With 198 scientifically recognized viruses starting with the letter “P,” this comprehensive list covers a wide range of viral families and host species from around the world. These viruses include those that affect humans, animals, plants, and even microorganisms, showing the vast diversity of viruses classified under this letter. Many are transmitted by insects or rodents, while others infect plants or aquatic life, highlighting important ecological and health connections across species.
Explore the detailed table below to learn more about each virus, its classification, hosts, symptoms, and transmission methods.
Virus Name This column lists the official name of each virus, providing a clear identifier that helps distinguish it from others.
Family Here, find the viral family or order to which the virus belongs. This classification groups viruses by shared genetic and structural traits.
Primary Hosts This column shows which organisms the virus mainly infects, such as humans, animals, plants, or bacteria.
Associated Illness/Symptoms Learn about the common signs or diseases linked to infections from each virus, giving insight into their impact on hosts.
Transmission Method This explains how the virus spreads, whether by direct contact, vectors like mosquitoes or ticks, airborne routes, mechanical means, or other specific ways.
Descripción A brief description provides additional context, such as specifics of the virus’s effects, ecology, and current scientific understanding.
Viruses that start with P
| Virus Name | Classification | Affects Humans? | Symptoms | Transmission Method |
|---|---|---|---|---|
| Pacao virus | Orthobunyavirus (Peribunyavirales) | Rarely (Zoonotic) | Febrile illness | Mosquito vector |
| Pacheco’s disease virus | Alphaherpesvirus (Herpesviridae) | No | Fatal liver disease in parrots | Direct contact, oral-fecal |
| Pactoli virus | Orthobunyavirus (Peribunyavirales) | Unknown | Febrile illness | Unknown vector |
| Pajuçara virus | Flavivirus | Unknown | Unknown | Mosquito vector |
| Panamanian Fruit-eating Bat Reovirus | Reovirus | No | Specific to bats; often asymptomatic | Bat-to-bat (likely fecal-oral) |
| Pandoravirus | Giant DNA virus | No | Infects amoebas | N/A (infects amoebas) |
| Panjin ranavirus | Ranavirus (Iridoviridae) | No | Haemorrhagic disease, systemic necrosis in amphibians/fish | Water, direct contact |
| Panlongavirus | Phycodnaviridae | No | Infects algae | N/A (infects algae) |
| Panshi hantavirus | Hantavirus (Peribunyavirales) | Yes (Zoonotic) | Hantavirus Pulmonary Syndrome (HPS), HFRS | Rodent excreta (aerosolized) |
| Panthera pardus papillomavirus 1 | Papillomavirus | No | Skin lesions, warts in leopards | Direct contact |
| Pantoea phage LIMElight | Bacteriophage | No | Infects *Pantoea* bacteria | N/A (bacterial infection) |
| Papaya leaf curl virus | Begomovirus (Geminiviridae) | No | Leaf curling, stunting, reduced fruit yield in papaya | Whiteflies |
| Papaya mosaic virus | Potyvirus | No | Mosaic patterns, blistering on papaya leaves | Mechanical, possibly aphids |
| Papaya ringspot virus | Potyvirus | No | Ringspots on fruit, mosaic on leaves, stunting in papaya | Aphids |
| Papillomaviridae | Viral Family | Yes (some genera) | N/A (family); warts, some cancers (in specific viruses) | N/A (family); direct contact |
| Papillomavirus | Viral Genus | Yes | N/A (genus); warts, some cancers | Direct contact |
| Paracaryophanon virus | Bacteriophage | No | Infects *Paracaryophanon* bacteria | N/A (bacterial infection) |
| Paracineta phage Pcla-A | Bacteriophage | No | Infects *Paracineta* bacteria | N/A (bacterial infection) |
| Parramatta River virus | Alphavirus (Togaviridae) | Yes (Potential) | Arthralgia, rash, fever | Mosquito vector |
| Parana virus | Mammarenavirus (Arenaviridae) | Rarely (Zoonotic) | Febrile illness, haemorrhagic fever | Rodent excreta (aerosolized) |
| Parainfluenza virus | Rubulavirus/Respirovirus (Paramyxoviridae) | Yes | Respiratory illness (croup, bronchitis, pneumonia) | Airborne, direct contact |
| Paramyxoviridae | Viral Family | Yes (many genera) | N/A (family); respiratory illness, measles, mumps (in specific viruses) | N/A (family); airborne, direct contact |
| Parapoxvirus | Viral Genus (Poxviridae) | Yes (Zoonotic) | Skin lesions (nodules, pustules) | Direct contact with infected animals |
| Paravaccinia virus | Parapoxvirus | Yes (Zoonotic) | Milker’s nodule (skin lesions) | Direct contact with infected cattle |
| Parechovirus | Viral Genus (Picornaviridae) | Yes | Respiratory, gastrointestinal, rash, neurological (in infants) | Fecal-oral, respiratory droplets |
| Partitiviridae | Viral Family | No | N/A (family); plant/fungal symptoms | N/A (family); fungal spores, seed-borne |
| Parvoviridae | Viral Family | Yes (some genera) | N/A (family); fifth disease, anemia (in specific viruses) | N/A (family); respiratory droplets, direct contact |
| Parvovirus | Viral Genus | Yes (some species) | N/A (genus); depends on species (e.g., B19 causes fifth disease) | N/A (genus) |
| Parvovirus B19 | Parvovirus (Parvoviridae) | Yes | Fifth disease (rash), arthralgia, transient aplastic crisis | Respiratory droplets, blood products |
| Passiflora latent virus | Potyvirus | No | Latent/mild symptoms in passionfruit | Aphids |
| Passiflora ringspot virus | Potyvirus | No | Ringspots, leaf distortion, reduced yield in passionfruit | Aphids |
| Pastinaca sativa umbra-like virus | Umbra-like virus | No | Unknown in parsnip | Unknown |
| Patas monkey cytomegalovirus | Cytomegalovirus (Herpesviridae) | No | Unknown/mild in patas monkeys | Direct contact, body fluids |
| Patas monkey polyomavirus 2 | Polyomavirus | No | Unknown/mild in patas monkeys | Unknown |
| Patate virus | Plant virus (unclassified) | No | Unknown in potatoes | Unknown |
| Pathum Thani virus | Unclassified (arbovirus-like) | Unknown | Unknown | Unknown (likely arthropod vector) |
| Pea enation mosaic virus | Enamovirus (Luteoviridae) | No | Enations (outgrowths), mosaic, stunting in peas | Aphids |
| Pea mild mosaic virus | Potyvirus | No | Mild mosaic symptoms in peas | Aphids, seed-borne |
| Pea seed-borne mosaic virus | Potyvirus | No | Mosaic, stunting, pod malformation in peas | Seed-borne, aphids |
| Pea stem necrosis virus | Tombusviridae | No | Stem necrosis, stunting in peas | Soil-borne |
| Peach latent mosaic viroid | Viroid | No | Latent/mild mosaic, fruit deformation in peaches | Mechanical, budding |
| Peach mosaic virus | Prunusvirus (Betaflexiviridae) | No | Mosaic patterns on leaves, fruit deformation, stunting in peaches | Peach bud mite |
| Peacockpox virus | Avipoxvirus (Poxviridae) | No | Pox lesions on skin, mucous membranes in peacocks | Direct contact, fomites, mosquitoes |
| Peanut clump virus | Pecluvirus (Tombusviridae) | No | Clumping, stunting, chlorosis in peanuts | Soil-borne fungus (*Polymyxa graminis*) |
| Peanut mottle virus | Potyvirus | No | Mottle, mosaic patterns on peanut leaves | Aphids, seed-borne |
| Peanut stripe virus | Potyvirus | No | Distinctive striping, mosaic on peanut leaves | Aphids, seed-borne |
| Peanut stunt virus | Cucumovirus (Bromoviridae) | No | Stunting, mosaic, reduced yield in peanuts | Aphids, seed-borne |
| Pear blister canker viroid | Viroid | No | Blister cankers on pear trees | Mechanical, budding |
| Pecan shell-bark virus | Plant virus (unclassified) | No | Shell-bark disease in pecan trees | Unknown (likely mechanical or vector) |
| Pecan yellow mosaic virus | Potyvirus | No | Yellow mosaic patterns on pecan leaves | Unknown (likely insect vector) |
| Pectinatus phage PM1 | Bacteriophage | No | Infects *Pectinatus* bacteria | N/A (bacterial infection) |
| Pegivirus | Viral Genus (Flaviviridae) | Yes (Pegivirus A) | Generally asymptomatic in humans; possible chronic fatigue | Blood-borne |
| Pelargonium flower break virus | Tospovirus (Peribunyavirales) | No | Flower break (color breaking), necrotic spots in pelargoniums | Thrips |
| Pelargonium line pattern virus | Carlavirus | No | Line patterns, mosaic on pelargonium leaves | Mechanical, aphids |
| Pelargonium zonate spot virus | Tombusviridae | No | Zonate spots, ringspots, stunting in pelargoniums | Fungal spores (*Olpidium brassicae*) |
| Penaeus monodon nudivirus | Nudivirus | No | White spot syndrome in shrimp | Water, direct contact |
| Penguinpox virus | Avipoxvirus (Poxviridae) | No | Pox lesions on skin, mucous membranes in penguins | Direct contact, fomites, mosquitoes |
| Penicillifer virus | Mycovirus | No | Affects fungi (*Penicillifer* species), often asymptomatic | Fungal spores |
| Pennisetum mosaic virus | Potyvirus | No | Mosaic, streaking on Pennisetum grasses | Aphids |
| Pentapartitivirus | Viral Genus (Partitiviridae) | No | N/A (genus); plant/fungal symptoms | N/A (genus); fungal spores, seed-borne |
| Pepper chat fruit viroid | Viroid | No | Small, malformed fruit in peppers | Mechanical |
| Pepper golden mosaic virus | Begomovirus (Geminiviridae) | No | Golden mosaic, stunting, reduced yield in peppers | Whiteflies |
| Pepper huasteco yellow vein virus | Begomovirus (Geminiviridae) | No | Yellow vein, stunting, reduced yield in peppers | Whiteflies |
| Pepper mild mottle virus | Tobamovirus | No | Mild mottle, mosaic on peppers | Mechanical, seed-borne |
| Pepper mottle virus | Potyvirus | No | Mottle, distortion, stunting in peppers | Aphids |
| Pepper ringspot virus | Tobamovirus | No | Ringspots, necrosis on peppers | Mechanical, seed-borne |
| Pepper veinal mottle virus | Potyvirus | No | Veinal mottle, distortion, stunting in peppers | Aphids |
| Pepino mosaic virus | Potexvirus | No | Mosaic, bubbling, fruit blotch on tomatoes/pepinos | Mechanical |
| Perch iridovirus | Iridovirus | No | Haemorrhagic septicaemia, necrosis in perch | Water, direct contact |
| Perch rhabdovirus | Rhabdovirus | No | Swim bladder inflammation, ascites in perch | Water, direct contact |
| Peribunyavirales | Viral Order | Yes (some families) | N/A (order); febrile illness, hemorrhagic fevers (in specific viruses) | N/A (order); arthropod vectors, rodent excreta |
| Perinet virus | Phlebovirus (Peribunyavirales) | Yes (Potential) | Febrile illness | Mosquitoes |
| Perkinsus marinus virus | Unclassified (Protist virus) | No | Infects *Perkinsus marinus* (oyster parasite) | N/A (infects protozoan) |
| Permutotetraviridae | Viral Family | No | N/A (family); insect symptoms (if any) | N/A (family) |
| Persimmon virus A | Vitivirus (Betaflexiviridae) | No | Mild symptoms, possibly associated with decline in persimmon | Mechanical, grafting |
| Persimmon viroid | Viroid | No | Symptoms not well-defined in persimmon, potentially mild | Mechanical, grafting |
| Pestivirus | Viral Genus (Flaviviridae) | No | N/A (genus); mucosal disease, classical swine fever (in specific viruses) | N/A (genus); direct contact |
| Petunia asteroid mosaic virus | Tymovirus (Tymoviridae) | No | Asteroid mosaic, ringspots in petunias | Beetles |
| Phage G | Bacteriophage | No | Infects *Bacillus megaterium* | N/A (bacterial infection) |
| Phage P1 | Bacteriophage | No | Infects *E. coli* | N/A (bacterial infection) |
| Phage P2 | Bacteriophage | No | Infects *E. coli* | N/A (bacterial infection) |
| Phage P22 | Bacteriophage | No | Infects *Salmonella typhimurium* | N/A (bacterial infection) |
| Phage phi-X174 | Bacteriophage | No | Infects *E. coli* | N/A (bacterial infection) |
| Phaeovirus | Phaeovirus (Phycodnaviridae) | No | Infects brown algae | N/A (infects algae) |
| Phalaenopsis chlorotic spot virus | Orthotospovirus (Peribunyavirales) | No | Chlorotic spots, necrosis in orchids | Thrips |
| Phaseolus vulgaris endornavirus 1 | Endornavirus | No | Often asymptomatic, some mild leaf symptoms in common bean | Seed-borne |
| Pheasant virus | Avian virus (general term) | No | Respiratory disease, inclusion body hepatitis in pheasants | Direct contact, fecal-oral |
| Phellinus giganteus mycovirus 1 | Mycovirus | No | Affects *Phellinus giganteus* fungus, potentially altering growth | Fungal spores |
| Phlebovirus | Viral Genus (Peribunyavirales) | Yes | Febrile illness, Rift Valley fever, sandfly fever | Arthropod vectors (mosquitoes, sandflies) |
| Phocid alphaherpesvirus 1 | Alphaherpesvirus (Herpesviridae) | No | Respiratory disease, neurological signs in seals | Direct contact |
| Phocine distemper virus | Morbillivirus (Paramyxoviridae) | No | Respiratory, neurological, immunosuppression in seals | Direct contact, airborne |
| Phycodnaviridae | Viral Family | No | N/A (family); infects algae | N/A (family) |
| Picobirnavirus | Picobirnavirus | Yes (Potential) | Diarrhea | Fecal-oral |
| Picornavirales | Viral Order | Yes (many families) | N/A (order); wide range from mild to severe (polio, common cold, hepatitis A) | N/A (order); fecal-oral, respiratory |
| Picornaviridae | Viral Family | Yes (many genera) | N/A (family); common cold, polio, hepatitis A (in specific viruses) | N/A (family); fecal-oral, respiratory |
| Pichinde mammarenavirus | Mammarenavirus (Arenaviridae) | No (Lab model) | Asymptomatic in natural host (rodent), causes disease in lab animals | Rodent excreta |
| Pichinde virus | Mammarenavirus (Arenaviridae) | No (Lab model) | Asymptomatic in natural host (rodent) | Rodent excreta |
| Pigeon circovirus | Circovirus | No | Immunosuppression, weight loss, feather abnormalities in pigeons | Fecal-oral, feather dust |
| Pigeonpox virus | Avipoxvirus (Poxviridae) | No | Pox lesions on skin, mucous membranes in pigeons | Direct contact, fomites, mosquitoes |
| Pike fry rhabdovirus | Rhabdovirus | No | Haemorrhagic septicaemia, ascites in pike fry | Water, direct contact |
| Pike herpesvirus | Herpesvirus | No | Tumors (lymphosarcoma) in pike | Direct contact |
| Pilchard calicivirus | Calicivirus | No | Affects pilchards (sardines) | Water, direct contact |
| Pinal virus | Orthobunyavirus (Peribunyavirales) | Yes (Potential) | Febrile illness | Mosquitoes |
| Pine-tree lappa-like virus | Plant virus (unclassified) | No | Unknown in pine trees | Unknown |
| Pineapple mealybug wilt-associated virus | Ampelovirus (Closteroviridae) | No | Wilt, reddening, necrosis in pineapple | Mealybugs |
| Pineapple yellow spot virus | Orthotospovirus (Peribunyavirales) | No | Yellow spots, necrosis, stunting in pineapple | Thrips |
| Pingbian virus | Orthobunyavirus (Peribunyavirales) | Yes (Potential) | Febrile illness | Mosquitoes |
| Pipistrellus bat coronavirus | Coronavirus | No | Affects bats, mild to asymptomatic | Bat-to-bat |
| Pipistrellus kuhlii coronavirus 3398 | Coronavirus | No | Affects bats, mild to asymptomatic | Bat-to-bat |
| Pirital virus | Mammarenavirus (Arenaviridae) | Yes (Zoonotic) | Febrile illness, haemorrhagic fever | Rodent excreta (aerosolized) |
| Piry virus | Vesiculovirus (Rhabdoviridae) | Yes (Potential) | Febrile illness | Mosquitoes |
| Pisang lilin badnavirus | Badnavirus (Caulimoviridae) | No | Mosaic, streaking on banana (*Pisang lilin*) | Mealybugs, mechanical |
| Piscine myocarditis virus | Orthomyxovirus | No | Myocarditis (heart inflammation) in salmon | Water, direct contact |
| Pisum sativum cryspovirus 1 | Cryspovirus (Partitiviridae) | No | Affects pea fungus (*Pisum sativum* fungus) | Fungal spores |
| Pithovirus | Giant DNA virus | No | Infects amoebas | N/A (infects amoebas) |
| Pixuna virus | Alphavirus (Togaviridae) | Yes (Potential) | Febrile illness, arthralgia | Mosquitoes |
| Placa de virus | Not a virus name | N/A | N/A | N/A |
| Plantago asiatica mosaic virus | Potexvirus | No | Mosaic, necrosis in plantain | Mechanical, sap |
| Plantago mottle virus | Tymovirus (Tymoviridae) | No | Mottle, distortion in plantain | Beetles |
| Plasmodium falciparum gemycircularvirus | Gemycircularvirus | No (infects parasite) | Infects *Plasmodium falciparum* (malaria parasite) | N/A (infects protozoan) |
| Plasmodium vivax gemycircularvirus | Gemycircularvirus | No (infects parasite) | Infects *Plasmodium vivax* (malaria parasite) | N/A (infects protozoan) |
| Plasmaviridae | Viral Family | No | N/A (family); infects bacteria | N/A (family) |
| Platalea alphaherpesvirus 1 | Alphaherpesvirus (Herpesviridae) | No | Affects spoonbills (*Platalea* species) | Direct contact |
| Plautia stali intestine virus | Dicistroviridae | No | Affects *Plautia stali* insect (stink bug relative) | Oral |
| Pleurotus ostreatus virus 1 | Mycovirus | No | Affects oyster mushroom (*Pleurotus ostreatus*), potentially influencing growth | Fungal spores |
| Pleven virus | Orthobunyavirus (Peribunyavirales) | Yes (Potential) | Febrile illness | Mosquitoes |
| Plum bark necrosis stem pitting-associated virus | Ampelovirus (Closteroviridae) | No | Bark necrosis, stem pitting in plums | Mechanical, grafting |
| Plum pox virus | Potyvirus | No | Ringspots on leaves/fruit, deformation, reduced yield in plums | Aphids, grafting |
| Pneumonia of mice virus | Pneumovirus (Paramyxoviridae) | No | Pneumonia, respiratory distress in mice | Airborne, direct contact |
| Pneumoviridae | Viral Family | Yes (some genera) | N/A (family); respiratory illness (in specific viruses) | N/A (family); airborne, direct contact |
| Pneumovirus | Viral Genus (Pneumoviridae) | Yes | Respiratory illness | Airborne, direct contact |
| Poa semilatent virus | Sobemovirus | No | Semilatent, mild mosaic in *Poa* grasses | Mechanical, seed-borne |
| Poinsettia mosaic virus | Tymovirus (Tymoviridae) | No | Mosaic, distortion in poinsettias | Mechanical |
| Poinsettia latent virus | Tymovirus (Tymoviridae) | No | Latent/mild in poinsettias | Mechanical |
| Podoviridae | Viral Family | No | N/A (family); infects bacteria | N/A (family) |
| Polerovirus | Viral Genus (Luteoviridae) | No | N/A (genus); phloem-limited, stunt, yellowing in plants | N/A (genus); aphids (circulative) |
| Poliovirus | Enterovirus (Picornaviridae) | Yes | Asymptomatic, mild flu-like, paralytic poliomyelitis | Fecal-oral, respiratory droplets |
| Polyomaviridae | Viral Family | Yes (some genera) | N/A (family); asymptomatic, opportunistic infections, some cancers (in specific viruses) | N/A (family); respiratory, direct contact |
| Polyomavirus | Viral Genus | Yes | N/A (genus); typically asymptomatic, some linked to opportunistic infections or cancers | N/A (genus) |
| Pome fruit viroid 1 | Viroid | No | Stunting, fruit deformation in pome fruits | Mechanical, grafting |
| Pongine alphaherpesvirus 3 | Alphaherpesvirus (Herpesviridae) | No | Affects great apes (pongines) | Direct contact |
| Pongine betaherpesvirus 4 | Betaherpesvirus (Herpesviridae) | No | Affects great apes (pongines) | Direct contact |
| Pongine lymphocryptovirus 1 | Lymphocryptovirus (Herpesviridae) | No | Affects great apes (pongines) | Direct contact |
| Pont-Saint-Esprit-La-Blache virus | Orthobunyavirus (Peribunyavirales) | Yes (Potential) | Febrile illness | Mosquitoes |
| Poplar mosaic virus | Potexvirus | No | Mosaic, ringspots on poplar leaves | Mechanical, grafting |
| Porcine astrovirus | Astrovirus | No | Diarrhea in pigs | Fecal-oral |
| Porcine bocavirus | Bocaparvovirus (Parvoviridae) | No | Diarrhea, respiratory illness in pigs | Fecal-oral, respiratory |
| Porcine circovirus | Circovirus | No | Postweaning multisystemic wasting syndrome (PMWS), reproductive failure in pigs | Direct contact, fecal-oral, aerosols |
| Porcine cytomegalovirus | Cytomegalovirus (Herpesviridae) | No | Rhinitis, pneumonia, reproductive issues in pigs | Direct contact, body fluids |
| Porcine epidemic diarrhea virus | Alphacoronavirus (Coronaviridae) | No | Severe diarrhea, vomiting, dehydration in pigs | Fecal-oral |
| Porcine enterovirus | Enterovirus (Picornaviridae) | No | Reproductive failure, neurological disease, diarrhea in pigs | Fecal-oral |
| Porcine hemagglutinating encephalomyelitis virus | Gammacoronavirus (Coronaviridae) | No | Vomiting and wasting disease, encephalomyelitis in pigs | Nasal secretions, direct contact |
| Porcine kobuvirus | Kobuvirus (Picornaviridae) | No | Diarrhea in pigs | Fecal-oral |
| Porcine parvovirus | Parvovirus (Parvoviridae) | No | Reproductive failure (SMEDI syndrome) in pigs | Fecal-oral |
| Porcine reproductive and respiratory syndrome virus | Arterivirus (Arteriviridae) | No | Reproductive failure, respiratory disease in pigs | Airborne, direct contact, semen |
| Porcine sapovirus | Sapovirus (Caliciviridae) | No | Diarrhea in pigs | Fecal-oral |
| Porcine torovirus | Torovirus (Coronaviridae) | No | Diarrhea in pigs | Fecal-oral |
| Porcine teschovirus | Teschovirus (Picornaviridae) | No | Encephalomyelitis, polioencephalomyelitis in pigs | Fecal-oral |
| Porton virus | Hantavirus (Peribunyavirales) | No (Found in rodents) | Asymptomatic in rodents | Rodent excreta |
| Potexvirus | Viral Genus | No | N/A (genus); mosaic, mild symptoms in plants | N/A (genus); mechanical |
| Potato aucuba mosaic virus | Potexvirus | No | Aucuba (yellow) mosaic on potato leaves, necrosis | Mechanical, contact |
| Potato black ringspot virus | Nepovirus (Secoviridae) | No | Black ringspots, necrosis, stunting in potatoes | Nematodes, seed-borne |
| Potato deforming mosaic virus | Plant virus (unclassified) | No | Deforming mosaic on potato leaves, stunting | Aphids, mechanical |
| Potato leafroll virus | Polerovirus (Luteoviridae) | No | Leafrolling, stunting, net necrosis in potato tubers | Aphids (persistent) |
| Potato mop-top virus | Pomovirus (Virgaviridae) | No | Mop-top, spraing (internal necrosis) in potato tubers | Soil-borne fungus (*Spongospora subterranea*) |
| Potato spindle tuber viroid | Viroid | No | Spindle-shaped tubers, stunting, cracking in potatoes | Mechanical, seed-borne, pollen |
| Potato virus A | Potyvirus | No | Mild mosaic, crinkling on potato leaves | Aphids, mechanical |
| Potato virus M | Carlavirus | No | Mild mosaic, crinkle, deformation on potato leaves | Aphids, mechanical |
| Potato virus P | Potyvirus | No | Mild mosaic on potato leaves | Aphids, mechanical |
| Potato virus S | Carlavirus | No | Usually asymptomatic or very mild mosaic in potatoes | Aphids, mechanical |
| Potato virus T | Tritimovirus | No | Mild mosaic on potato leaves | Mechanical |
| Potato virus V | Potyvirus | No | Mild mosaic, necrosis in potatoes | Aphids |
| Potato virus X | Potexvirus | No | Mild mosaic, sometimes asymptomatic in potatoes | Mechanical |
| Potato virus Y | Potyvirus | No | Severe mosaic, necrosis, leaf drop, stunting in potatoes | Aphids |
| Potato yellow dwarf virus | Cytorhabdovirus (Rhabdoviridae) | No | Yellow dwarf, stunting, necrosis in potatoes | Leafhoppers |
| Potato yellow vein virus | Crinivirus (Closteroviridae) | No | Yellow vein, stunting in potatoes | Whiteflies |
| Potyviridae | Viral Family | No | N/A (family); mosaic, ringspot, stunt in plants | N/A (family); aphids, mechanical |
| Potyvirus | Viral Genus | No | N/A (genus); mosaic, ringspot, stunt in plants | N/A (genus); aphids, mechanical |
| Powassan virus | Flavivirus | Yes | Asymptomatic, febrile illness, encephalitis | Ticks |
| Poxviridae | Viral Family | Yes (some genera) | N/A (family); skin lesions, pox (in specific viruses) | N/A (family); direct contact, aerosols |
| Premnobius virus | Reovirus | No (Insect virus) | Affects *Premnobius* insects | N/A |
| Prospect Hill virus | Hantavirus (Peribunyavirales) | No (Found in rodents, low human pathogenicity) | Asymptomatic in rodents, potentially mild febrile illness in humans | Rodent excreta (aerosolized) |
| Providence virus | Flavivirus | Yes (Potential) | Febrile illness | Mosquitoes |
| Prune dwarf virus | Ilarvirus (Bromoviridae) | No | Dwarfism, leaf distortion, reduced yield in stone fruits | Pollen, seed-borne, mechanical |
| Prunus virus I | Betaflexiviridae | No | Mild or asymptomatic in stone fruits | Mechanical, grafting |
| Prunus necrotic ringspot virus | Ilarvirus (Bromoviridae) | No | Necrotic ringspots, shothole, reduced yield in stone fruits | Pollen, seed-borne, mechanical |
| Psittacid alphaherpesvirus 1 | Alphaherpesvirus (Herpesviridae) | No | Pacheco’s disease (fatal liver disease) in parrots | Direct contact, oral-fecal |
| Psittacine adenovirus | Adenovirus | No | Hepatitis, enteritis, sudden death in parrots | Fecal-oral |
| Psittacinepox virus | Avipoxvirus (Poxviridae) | No | Pox lesions on skin, mucous membranes in parrots | Direct contact, fomites, mosquitoes |
| Pteromalus puparum bracovirus | Bracovirus (Polydnaviridae) | No | Suppresses host insect immune system | Via parasitic wasp (symbiotic) |
| Pteropine orthoreovirus | Orthoreovirus (Reoviridae) | Yes (Potential zoonotic) | Febrile illness, respiratory symptoms | Bat-to-human (potentially via aerosolized bat droppings) |
| Pteropus bat coronavirus HKU9 | Coronavirus | No | Affects bats, mild to asymptomatic | Bat-to-bat |
| Pteropus lylei-associated cyclovirus | Cyclovirus (Circoviridae) | No | Affects bats, specific symptoms unknown | Bat-to-bat |
| Puffinosis virus | Orthobunyavirus (Peribunyavirales) | No | Debilitation, neurological signs in puffins | Ticks |
| Pultovi virus | Orthobunyavirus (Peribunyavirales) | Yes (Potential) | Febrile illness | Mosquitoes |
| Pumpkin yellow mosaic virus | Begomovirus (Geminiviridae) | No | Yellow mosaic, leaf distortion, stunting in pumpkins | Whiteflies |
| Puumala virus | Hantavirus (Peribunyavirales) | Yes (Zoonotic) | Nephropathia epidemica (mild HFRS), fever, kidney dysfunction | Rodent excreta (aerosolized) |
| Pygoscelis adeliae papovavirus | Polyomavirus (Polyomaviridae) | No | Affects Adelie penguins (*Pygoscelis adeliae*) | Unknown |
Descriptions
Pacao virus
A largely uncharacterized orthobunyavirus found in bats, with potential for zoonotic transmission causing febrile illness. Its full impact is still under investigation.
Pacheco’s disease virus
A highly pathogenic herpesvirus causing Pacheco’s disease, a severe and often fatal liver condition primarily affecting psittacine birds like parrots.
Pactoli virus
A lesser-known orthobunyavirus, its full impact on humans and specific transmission methods are still being investigated. It has been isolated from rodents.
Pajuçara virus
A mosquito-borne flavivirus discovered in Brazil. The clinical significance and host range of Pajuçara virus are not fully established.
Panamanian Fruit-eating Bat Reovirus
A reovirus identified in fruit-eating bats in Panama. It belongs to a diverse group of viruses with generally low pathogenicity in their natural bat hosts.
Pandoravirus
An exceptionally large DNA virus known for its massive genome and infecting amoebas. It challenges traditional definitions of viruses due to its immense size and complexity.
Panjin ranavirus
A ranavirus impacting amphibians and fish, causing severe systemic infections and significant mortality in affected populations. It is a major threat to aquatic biodiversity.
Panlongavirus
A giant DNA virus from the Phycodnaviridae family, known to infect marine algae. These viruses play an ecological role in marine ecosystems by lysing algal blooms.
Panshi hantavirus
A hantavirus strain, carried by rodents, that can cause severe Hantavirus Pulmonary Syndrome (HPS) or Hemorrhagic Fever with Renal Syndrome (HFRS) in humans.
Panthera pardus papillomavirus 1
A papillomavirus specifically found in leopards (*Panthera pardus*), causing benign skin lesions such as warts. It is species-specific.
Pantoea phage LIMElight
A bacteriophage that specifically infects *Pantoea* bacteria. Phages are viruses that replicate inside bacteria and archaea, potentially useful in antibacterial therapies.
Papaya leaf curl virus
A devastating plant virus affecting papaya, causing severe leaf curling and distortion, and significantly impacting fruit production. It is transmitted by whiteflies.
Papaya mosaic virus
A common plant virus causing mosaic patterns and blistering on papaya leaves. It can lead to reduced fruit quality and yield, and is easily spread mechanically.
Papaya ringspot virus
A highly destructive potyvirus severely impacting papaya crops worldwide, known for causing characteristic ringspots on fruit and mosaic patterns on leaves.
Papillomaviridae
A family of DNA viruses known for causing papillomas (warts) in various animals, including humans. Some types are linked to certain cancers.
Papillomavirus
A genus within the Papillomaviridae family, comprising numerous types that infect epithelial cells and can cause skin or mucosal warts, with some leading to cancer.
Paracaryophanon virus
A bacteriophage specifically infecting *Paracaryophanon* bacteria. Bacteriophages are viruses that target and replicate within bacterial hosts, often used in research.
Paracineta phage Pcla-A
A bacteriophage that targets *Paracineta* bacteria. Bacteriophages are viral agents that infect and replicate within bacterial cells, playing roles in microbial ecology.
Parramatta River virus
An arbovirus detected in Australia, related to Ross River virus, causing arthralgia, rash, and fever in humans. It is transmitted by mosquitoes.
Parana virus
A rodent-borne mammarenavirus, typically carried by rodents, with potential to cause febrile illnesses and, in rare cases, hemorrhagic fever in humans.
Parainfluenza virus
A common cause of respiratory infections in humans, particularly young children, leading to illnesses like croup, bronchitis, and pneumonia. There are multiple types.
Paramyxoviridae
A large family of RNA viruses that includes significant human and animal pathogens such as measles, mumps, and respiratory syncytial virus.
Parapoxvirus
A genus of zoonotic DNA viruses causing localized skin lesions in humans, typically acquired through contact with infected animals like sheep, goats, or cattle.
Paravaccinia virus
A parapoxvirus causing “milker’s nodule” in humans, an occupational infection characterized by benign skin lesions, transmitted from infected cattle.
Parechovirus
A genus of RNA viruses primarily affecting infants and young children, causing a range of symptoms from mild respiratory or gastrointestinal illness to more severe neurological complications.
Partitiviridae
A family of double-stranded RNA viruses primarily infecting plants and fungi. They are often persistent in their hosts and not typically associated with severe disease.
Parvoviridae
A family of small, single-stranded DNA viruses, some of which infect humans (e.g., Parvovirus B19), while others infect animals, causing a variety of diseases.
Parvovirus
A genus of small DNA viruses, widely distributed, with various species infecting a broad range of animal hosts, including humans (e.g., Parvovirus B19).
Parvovirus B19
A human parvovirus known for causing “fifth disease” in children, characterized by a distinctive facial rash. It can also lead to arthritis or anemia in adults.
Passiflora latent virus
A plant virus affecting passionfruit, often causing asymptomatic or mild infections, but can sometimes contribute to reduced plant vigor and yield.
Passiflora ringspot virus
A potyvirus causing ringspot symptoms on passionfruit leaves and fruit, leading to significant yield losses in infected crops. It is aphid-transmitted.
Pastinaca sativa umbra-like virus
A plant virus identified in parsnip (*Pastinaca sativa*). Its specific effects on the plant and transmission methods are still being researched and characterized.
Patas monkey cytomegalovirus
A species-specific cytomegalovirus infecting patas monkeys. It typically causes asymptomatic or mild infections in its natural host population.
Patas monkey polyomavirus 2
A polyomavirus identified in patas monkeys. Its specific pathogenicity and transmission dynamics within its host population are currently under investigation.
Patate virus
A general term for a plant virus that can impact potato crops, potentially causing various symptoms depending on the specific strain or type.
Pathum Thani virus
A newly identified virus, likely an arbovirus, discovered in Thailand. Its full host range and clinical implications for humans are currently under investigation.
Pea enation mosaic virus
A plant virus causing distinctive enations and mosaic patterns on pea plants, leading to reduced yields. It is transmitted persistently by aphids.
Pea mild mosaic virus
A plant virus affecting pea plants, typically causing mild mosaic symptoms and potentially impacting yield. It is often transmitted by aphids and through seeds.
Pea seed-borne mosaic virus
A significant plant virus for pea crops, causing mosaic symptoms and stunting, notably transmitted through seeds, making it challenging to control.
Pea stem necrosis virus
A plant virus affecting pea plants, characterized by stem necrosis and stunting. It is primarily transmitted through the soil.
Peach latent mosaic viroid
A viroid affecting peach trees, often causing latent infections but can lead to mild mosaic symptoms and fruit deformation, particularly in sensitive cultivars.
Peach mosaic virus
A plant virus causing distinct mosaic patterns on peach leaves, leading to deformed fruit and reduced tree vigor. It is transmitted by a mite.
Peacockpox virus
An avipoxvirus causing pox-like lesions in peacocks and other avian species, leading to skin and respiratory issues.
Peanut clump virus
A soil-borne plant virus affecting peanut crops, causing severe stunting and reduced yield. It is transmitted by a fungal vector in the soil.
Peanut mottle virus
A common plant virus impacting peanut crops, causing mottle and mosaic patterns on leaves, and can significantly reduce yield.
Peanut stripe virus
A widespread plant virus in peanuts, known for causing distinctive stripe patterns on leaves and substantial yield losses. It is both aphid and seed-borne.
Peanut stunt virus
A cucumovirus causing significant stunting and yield reduction in peanut plants, also affecting other legumes, transmitted by aphids and through seeds.
Pear blister canker viroid
A viroid affecting pear trees, causing characteristic blister cankers on the bark. It can weaken the tree and reduce fruit quality.
Pecan shell-bark virus
A plant virus associated with shell-bark disease in pecan trees, causing bark abnormalities and potentially impacting tree health and nut production.
Pecan yellow mosaic virus
A plant virus causing distinctive yellow mosaic patterns on the leaves of pecan trees, which can affect photosynthesis and tree vigor.
Pectinatus phage PM1
A bacteriophage that specifically infects *Pectinatus* bacteria. Bacteriophages are viruses that target and replicate within bacterial hosts, with potential applications.
Pegivirus
A genus of RNA viruses, including Pegivirus A, which commonly infects humans but is generally considered asymptomatic, though its full clinical impact is still being studied.
Pelargonium flower break virus
A plant virus infecting pelargoniums, causing distinctive color breaking and necrotic spots on flowers. It is transmitted by thrips.
Pelargonium line pattern virus
A plant virus found in pelargoniums, causing characteristic line patterns and mosaic symptoms on leaves, affecting plant aesthetics.
Pelargonium zonate spot virus
A plant virus infecting pelargoniums, leading to distinctive zonate spots and ringspots on leaves, transmitted through soil-borne fungal spores.
Penaeus monodon nudivirus
A nudivirus affecting the giant tiger prawn (*Penaeus monodon*), causing white spot syndrome, a highly lethal disease in aquaculture shrimp.
Penguinpox virus
An avipoxvirus causing pox-like lesions and other health issues in penguins, transmitted through direct contact or vectors.
Penicillifer virus
A mycovirus that infects filamentous fungi, potentially influencing their growth, development, and pathogenicity. Mycoviruses are viruses that infect fungi.
Pennisetum mosaic virus
A plant virus causing mosaic and streaking symptoms on various Pennisetum grasses, potentially impacting forage or grain yields.
Pentapartitivirus
A genus of double-stranded RNA viruses within the Partitiviridae family, primarily infecting plants and fungi. Their effects vary by host.
Pepper chat fruit viroid
A viroid affecting pepper plants, causing the fruit to be small and malformed, significantly impacting commercial value and crop yield.
Pepper golden mosaic virus
A begomovirus causing severe golden mosaic patterns on pepper leaves, leading to stunting and significant yield losses. It is transmitted by whiteflies.
Pepper huasteco yellow vein virus
A begomovirus causing severe yellow vein symptoms and stunting in pepper plants, a major problem in pepper cultivation. It is transmitted by whiteflies.
Pepper mild mottle virus
A highly contagious plant virus affecting peppers, causing mild mottle symptoms but can lead to significant yield losses. It is easily transmitted mechanically.
Pepper mottle virus
A common potyvirus impacting pepper plants, causing mottle and distortion of leaves, often leading to reduced plant vigor and yield.
Pepper ringspot virus
A plant virus affecting peppers, causing ringspot symptoms and necrotic lesions, impacting fruit quality and plant health. It can be mechanically transmitted.
Pepper veinal mottle virus
A widespread potyvirus infecting pepper plants, characterized by veinal mottle and leaf distortion, which can lead to significant crop losses.
Pepino mosaic virus
A highly contagious plant virus primarily affecting tomatoes and pepinos, causing mosaic symptoms, bubbling on leaves, and blotches on fruit, easily transmitted mechanically.
Perch iridovirus
An iridovirus causing severe systemic disease in perch and other fish species, leading to haemorrhage and necrosis, with high mortality rates.
Perch rhabdovirus
A rhabdovirus infecting perch, known to cause swim bladder inflammation and ascites, impacting the health and survival of fish populations.
Peribunyavirales
An order of RNA viruses containing several families, including Bunyaviridae, known for their arthropod-borne nature and causing diseases like hemorrhagic fevers in humans.
Perinet virus
A phlebovirus identified in mosquitoes, with potential to cause febrile illness in humans, though its full clinical significance is still being studied.
Perkinsus marinus virus
A virus that infects *Perkinsus marinus*, a protozoan parasite of oysters. Its impact on the parasite’s lifecycle and oyster health is under investigation.
Permutotetraviridae
A family of single-stranded RNA viruses primarily infecting insects. Their replication strategies are unique among positive-sense RNA viruses.
Persimmon virus A
A plant virus affecting persimmon trees, often causing mild or asymptomatic infections, but can sometimes contribute to overall tree decline.
Persimmon viroid
A viroid affecting persimmon trees. Its specific impact is still being studied, but viroids can cause disease and reduce yield.
Pestivirus
A genus of RNA viruses primarily infecting economically important animals like cattle, pigs, and sheep, causing diseases such as bovine viral diarrhea and classical swine fever.
Petunia asteroid mosaic virus
A plant virus causing distinctive asteroid-shaped mosaic patterns and ringspots on petunia leaves. It is transmitted by beetles.
Phage G
One of the largest known bacteriophages, infecting *Bacillus megaterium*. It is a complex virus that targets and replicates within bacterial cells.
Phage P1
A well-studied bacteriophage that infects *Escherichia coli*, known for its temperate lifecycle and its ability to carry host DNA, used in molecular biology.
Phage P2
A temperate bacteriophage infecting *Escherichia coli*, known for its detailed genetic mapping and its role as a model system in phage biology.
Phage P22
A temperate bacteriophage infecting *Salmonella typhimurium*, widely studied for its generalized transduction capabilities, transferring bacterial DNA.
Phage phi-X174
One of the first DNA-based organisms to have its entire genome sequenced. This small bacteriophage infects *Escherichia coli* and is a classic model in virology.
Phaeovirus
A type of giant DNA virus that infects brown algae. These viruses play a role in the ecology of marine environments by affecting algal populations.
Phalaenopsis chlorotic spot virus
A plant virus affecting Phalaenopsis orchids, causing chlorotic spots and necrotic lesions on leaves, severely impacting aesthetic value. It is transmitted by thrips.
Phaseolus vulgaris endornavirus 1
An endornavirus found in common bean (*Phaseolus vulgaris*). Endornaviruses replicate persistently within their plant hosts, often without causing overt disease symptoms.
Pheasant virus
A general term for viruses that can infect pheasants, potentially causing respiratory distress, inclusion body hepatitis, or other illnesses in these birds.
Phellinus giganteus mycovirus 1
A mycovirus that infects the giant bracket fungus (*Phellinus giganteus*). Mycoviruses are viruses that infect fungi, often without causing visible symptoms.
Phlebovirus
A genus of RNA viruses, many of which are arboviruses transmitted by mosquitoes or sandflies, causing febrile illnesses such as Rift Valley fever and sandfly fever in humans.
Phocid alphaherpesvirus 1
An alphaherpesvirus infecting seals (phocids), causing respiratory and neurological disease, particularly in young animals, leading to mortality.
Phocine distemper virus
A morbillivirus related to canine distemper, causing severe respiratory and neurological disease in seals, leading to mass mortality events.
Phycodnaviridae
A family of giant DNA viruses that infect a wide range of eukaryotic algae, playing crucial roles in aquatic ecosystems by lysing algal blooms.
Picobirnavirus
A family of double-stranded RNA viruses identified in various hosts, including humans, and associated with gastrointestinal infections and diarrhea.
Picornavirales
An order of RNA viruses encompassing several families, including Picornaviridae, known for their wide host range and diverse diseases, from the common cold to polio.
Picornaviridae
A large family of small RNA viruses that includes many significant human pathogens such as poliovirus, rhinoviruses (common cold), and enteroviruses.
Pichinde mammarenavirus
A mammarenavirus naturally found in rodents, often used as a laboratory model for studying hemorrhagic fevers due to its close relation to human pathogenic arenaviruses.
Pichinde virus
A mammarenavirus, discovered in Colombia, that primarily infects rodents. It serves as a non-pathogenic research model for studying more virulent arenaviruses.
Pigeon circovirus
A circovirus causing immunosuppression and various clinical signs in pigeons, including weight loss and feather abnormalities, affecting bird health.
Pigeonpox virus
An avipoxvirus that causes pigeonpox, characterized by proliferative lesions on the skin and mucous membranes of infected pigeons.
Pike fry rhabdovirus
A rhabdovirus causing a highly contagious and often fatal disease in young pike, characterized by internal haemorrhage and ascites.
Pike herpesvirus
A herpesvirus associated with lymphosarcoma, a type of tumor, in northern pike. Its specific mechanisms are under study.
Pilchard calicivirus
A calicivirus identified in pilchards (sardines), whose specific effects on fish health and populations are still being investigated.
Pinal virus
An orthobunyavirus identified in mosquitoes, indicating its potential as an arbovirus that could cause febrile illness in humans.
Pine-tree lappa-like virus
A virus identified in pine trees, whose specific classification and impact on tree health are still under investigation. Its “lappa-like” description refers to its morphology.
Pineapple mealybug wilt-associated virus
A closterovirus complex causing wilt, reddening, and necrosis in pineapple plants, resulting in significant crop losses. It is transmitted by mealybugs.
Pineapple yellow spot virus
A tospovirus affecting pineapple, causing characteristic yellow spots and necrosis on leaves, transmitted by thrips, leading to reduced yield.
Pingbian virus
An orthobunyavirus identified in mosquitoes, potentially capable of causing febrile illness in humans. Its full clinical profile is under study.
Pipistrellus bat coronavirus
A coronavirus found in Pipistrellus bats, part of a diverse group of coronaviruses circulating in bat populations, with ongoing research on zoonotic potential.
Pipistrellus kuhlii coronavirus 3398
A specific strain of coronavirus identified in Pipistrellus kuhlii bats, contributing to the understanding of coronavirus diversity in natural hosts.
Pirital virus
A rodent-borne mammarenavirus, primarily infecting rodents, that can cause febrile illness and, in severe cases, hemorrhagic fever in humans.
Piry virus
A rhabdovirus primarily infecting rodents, but also detected in humans, where it can cause febrile illness, transmitted by mosquitoes.
Pisang lilin badnavirus
A badnavirus affecting “Pisang lilin” banana cultivars, causing mosaic and streaking symptoms on leaves, impacting fruit production.
Piscine myocarditis virus
An orthomyxovirus causing heart inflammation (myocarditis) in farmed salmon, leading to significant economic losses in aquaculture.
Pisum sativum cryspovirus 1
A cryspovirus that infects a fungal endophyte of pea plants (*Pisum sativum*). Mycoviruses primarily infect fungi, often with no adverse effects.
Pithovirus
A type of giant DNA virus, even larger than Pandoraviruses, that infects amoebas. It was discovered in Siberian permafrost, highlighting viral longevity.
Pixuna virus
An arbovirus transmitted by mosquitoes, found in South America, that can cause febrile illness and joint pain in humans.
Placa de virus
This term refers to a “virus plaque,” which is a zone of cellular destruction caused by viral infection in a cell culture, not a virus itself.
Plantago asiatica mosaic virus
A plant virus causing mosaic and necrotic symptoms on plantain leaves (*Plantago asiatica*), easily transmitted mechanically through plant sap.
Plantago mottle virus
A plant virus infecting plantain (*Plantago*) species, causing mottle and leaf distortion, transmitted by beetles.
Plasmodium falciparum gemycircularvirus
A gemycircularvirus that infects *Plasmodium falciparum*, the parasite responsible for the most severe form of malaria. Its role in the parasite’s life cycle is being investigated.
Plasmodium vivax gemycircularvirus
A gemycircularvirus that infects *Plasmodium vivax*, another malaria-causing parasite. Its discovery highlights viral diversity within eukaryotic parasites.
Plasmaviridae
A family of bacteriophages with lipid envelopes, infecting various Gram-positive bacteria, particularly Acholeplasma species. They have a unique virion morphology.
Platalea alphaherpesvirus 1
An alphaherpesvirus identified in spoonbills (*Platalea* species). Its specific pathogenic effects in these birds are currently under study.
Plautia stali intestine virus
A dicistrovirus found in the intestine of the bug *Plautia stali*, an insect pest. These viruses typically infect insects and can serve as biocontrol agents.
Pleurotus ostreatus virus 1
A mycovirus that infects the oyster mushroom (*Pleurotus ostreatus*), a commonly cultivated edible fungus. It may affect mushroom development.
Pleven virus
An orthobunyavirus identified in mosquitoes, suggesting its potential to cause febrile illness in humans. Its prevalence and clinical impact are under investigation.
Plum bark necrosis stem pitting-associated virus
A closterovirus associated with bark necrosis and stem pitting in plum trees, causing significant damage and reducing tree vigor and productivity.
Plum pox virus
Also known as Sharka virus, a devastating potyvirus affecting stone fruit trees like plums, causing characteristic ringspots and fruit deformation.
Pneumonia of mice virus
A pneumovirus naturally infecting mice, causing pneumonia and respiratory illness, often used as a model for respiratory virus research.
Pneumoviridae
A family of RNA viruses, including respiratory syncytial virus, which are major causes of respiratory infections in humans and animals.
Pneumovirus
A genus of RNA viruses within the Pneumoviridae family, encompassing human respiratory syncytial virus (RSV), a common cause of respiratory illness, especially in infants.
Poa semilatent virus
A sobemovirus affecting *Poa* grasses, often causing asymptomatic or mild mosaic infections, and can be transmitted through seeds.
Poinsettia mosaic virus
A plant virus causing mosaic symptoms and leaf distortion in poinsettia plants, affecting their ornamental value. It is easily transmitted mechanically.
Poinsettia latent virus
A plant virus often causing asymptomatic or very mild infections in poinsettia plants, but can become more apparent under certain environmental conditions.
Podoviridae
A family of bacteriophages with short tails, belonging to the Caudovirales order. They are lytic viruses that infect and lyse bacterial cells.
Polerovirus
A genus of plant viruses that are restricted to the phloem tissue, causing symptoms like stunting and yellowing, and are persistently transmitted by aphids.
Poliovirus
A highly contagious enterovirus that can cause poliomyelitis, a severe disease leading to paralysis, though most infections are asymptomatic or mild.
Polyomaviridae
A family of small DNA viruses, many of which are common in humans and animals, typically causing asymptomatic infections but can cause disease in immunocompromised individuals.
Polyomavirus
A genus of DNA viruses within the Polyomaviridae family, widely distributed in vertebrates. Many human polyomaviruses are common and usually cause asymptomatic infections.
Pome fruit viroid 1
A viroid affecting pome fruit trees (apples, pears), potentially causing stunting and fruit deformation, impacting crop quality and yield.
Pongine alphaherpesvirus 3
An alphaherpesvirus identified in great apes (pongines), contributing to the understanding of herpesvirus evolution and host specificity among primates.
Pongine betaherpesvirus 4
A betaherpesvirus found in great apes (pongines), part of the diverse herpesvirus family, typically causing latent infections in its primate hosts.
Pongine lymphocryptovirus 1
A lymphocryptovirus identified in great apes (pongines), related to Epstein-Barr virus, often causing asymptomatic infections but can be associated with lymphomas.
Pont-Saint-Esprit-La-Blache virus
An orthobunyavirus identified in mosquitoes in France, suggesting its potential to cause febrile illness in humans, though its exact pathogenicity is under study.
Poplar mosaic virus
A plant virus affecting poplar trees, causing mosaic patterns and ringspots on leaves, potentially impacting tree growth and wood quality.
Porcine astrovirus
An astrovirus causing gastrointestinal illness, specifically diarrhea, in pigs, contributing to economic losses in swine farming.
Porcine bocavirus
A bocavirus commonly found in pigs, associated with respiratory and gastrointestinal issues, especially in young animals.
Porcine circovirus
A major pathogen in swine, causing Postweaning Multisystemic Wasting Syndrome (PMWS) and reproductive failure, leading to significant economic losses.
Porcine cytomegalovirus
A species-specific cytomegalovirus infecting pigs, causing respiratory symptoms, pneumonia, and reproductive disorders in affected swine.
Porcine epidemic diarrhea virus
A highly contagious alphacoronavirus causing severe diarrhea and vomiting in pigs, especially piglets, leading to high mortality rates and significant economic impact.
Porcine enterovirus
An enterovirus commonly found in pigs, causing a range of symptoms including reproductive failure, neurological disorders, and diarrhea.
Porcine hemagglutinating encephalomyelitis virus
A gammacoronavirus causing vomiting and wasting disease, and encephalomyelitis in young pigs, affecting their neurological system.
Porcine kobuvirus
A kobuvirus identified in pigs, associated with diarrhea and gastrointestinal issues, particularly in young piglets, impacting swine health.
Porcine parvovirus
A parvovirus causing reproductive failure in pigs, notably leading to Stillbirth, Mummification, Early embryonic death, and Infertility (SMEDI syndrome).
Porcine reproductive and respiratory syndrome virus
A major arterivirus causing significant reproductive failure and respiratory disease in pigs, leading to substantial economic losses in the swine industry.
Porcine sapovirus
A sapovirus associated with diarrhea in pigs, contributing to gastrointestinal illness in swine herds.
Porcine torovirus
A torovirus causing diarrhea in pigs, contributing to gastrointestinal disease, especially in young piglets.
Porcine teschovirus
A teschovirus causing Teschen disease, a severe neurological disorder (polioencephalomyelitis) in pigs, impacting their central nervous system.
Porton virus
A hantavirus detected in bank voles in the UK. While typically asymptomatic in its rodent hosts, hantaviruses are known for their zoonotic potential.
Potexvirus
A genus of filamentous plant viruses that are readily transmitted mechanically and cause mosaic or mild symptoms in a wide range of plant hosts.
Potato aucuba mosaic virus
A potexvirus causing distinctive aucuba (yellow) mosaic patterns on potato leaves and stems, and can also lead to necrosis.
Potato black ringspot virus
A nepovirus affecting potato plants, causing black ringspots and necrosis on leaves, transmitted by nematodes and through seeds.
Potato deforming mosaic virus
A plant virus causing deforming mosaic patterns on potato leaves and stunting of plants, impacting yield and tuber quality.
Potato leafroll virus
A polerovirus causing severe leafroll and stunting in potato plants, and characteristic net necrosis in tubers, transmitted by aphids.
Potato mop-top virus
A soil-borne plant virus causing mop-top symptoms (stunted, bushy growth) and internal necrosis (spraing) in potato tubers, transmitted by a fungal vector.
Potato spindle tuber viroid
The first viroid discovered, causing spindle-shaped, elongated, and cracked tubers in potatoes, leading to significant yield losses.
Potato virus A
A common potyvirus infecting potato plants, typically causing mild mosaic and crinkling symptoms on leaves, and can reduce yield.
Potato virus M
A carlavirus affecting potato plants, causing mild mosaic, crinkling, and deformation of leaves, impacting tuber yield and quality.
Potato virus P
A plant virus affecting potato plants, typically causing mild mosaic symptoms on leaves and potentially reducing tuber yield.
Potato virus S
A common carlavirus in potato plants, often asymptomatic or causing very mild mosaic symptoms, but can reduce yield, especially in combination with other viruses.
Potato virus T
A tritimovirus infecting potato plants, typically causing mild mosaic symptoms on leaves. It is readily transmitted mechanically.
Potato virus V
A potyvirus affecting potato plants, causing mild mosaic and sometimes necrotic symptoms, transmitted by aphids.
Potato virus X
A highly prevalent potexvirus in potato crops, often causing mild mosaic symptoms or being asymptomatic, but can significantly reduce yield in mixed infections.
Potato virus Y
One of the most economically damaging plant viruses for potato crops, causing severe mosaic, necrosis, and yield losses, transmitted by aphids.
Potato yellow dwarf virus
A rhabdovirus causing yellow dwarf disease in potatoes, characterized by severe stunting, yellowing, and necrosis, transmitted by leafhoppers.
Potato yellow vein virus
A crinivirus causing distinctive yellowing of veins and stunting in potato plants, leading to significant yield reductions, transmitted by whiteflies.
Potyviridae
The largest family of plant viruses, characterized by their filamentous particles. They cause a wide range of diseases, often leading to mosaic and ringspot symptoms.
Potyvirus
The largest genus within the Potyviridae family, comprising numerous plant viruses that cause significant crop diseases, typically transmitted by aphids.
Powassan virus
A tick-borne flavivirus causing neuroinvasive disease in humans, ranging from asymptomatic infection to severe encephalitis, with high fatality rates in serious cases.
Poxviridae
A large family of DNA viruses, including variola virus (smallpox). They are known for causing characteristic skin lesions (pox) in various animal hosts, including humans.
Premnobius virus
A reovirus identified in *Premnobius* insects, part of a diverse group of viruses that typically infect invertebrates.
Prospect Hill virus
A hantavirus found in meadow voles. While hantaviruses can cause severe disease, Prospect Hill virus is not strongly associated with human illness.
Providence virus
A flavivirus identified in mosquitoes, suggesting its potential to cause febrile illness in humans, though its full clinical significance is still under investigation.
Prune dwarf virus
An ilarvirus affecting stone fruit trees, causing dwarfism, leaf distortion, and reduced fruit yield, notably transmitted through pollen and seeds.
Prunus virus I
A plant virus affecting *Prunus* species (stone fruits), often causing mild or asymptomatic infections, though its long-term effects are studied.
Prunus necrotic ringspot virus
A highly prevalent ilarvirus affecting stone fruit trees, causing necrotic ringspots on leaves and fruit, leading to significant yield losses.
Psittacid alphaherpesvirus 1
An alphaherpesvirus causing Pacheco’s disease, a severe and often fatal liver disease in psittacine birds like parrots.
Psittacine adenovirus
An adenovirus specifically infecting psittacine birds, causing various conditions including hepatitis, enteritis, and sudden death, particularly in young birds.
Psittacinepox virus
An avipoxvirus causing pox-like lesions in psittacine birds (parrots), affecting their skin and mucous membranes.
Pteromalus puparum bracovirus
A bracovirus symbiotically integrated with the parasitic wasp *Pteromalus puparum*. The wasp injects the virus into its host caterpillar to suppress immunity.
Pteropine orthoreovirus
An orthoreovirus found in fruit bats, with potential to cause febrile and respiratory illnesses in humans, highlighting zoonotic spillover risks.
Pteropus bat coronavirus HKU9
A specific strain of coronavirus identified in fruit bats (Pteropus species), contributing to the extensive diversity of coronaviruses in wildlife.
Pteropus lylei-associated cyclovirus
A cyclovirus identified in Lyle’s flying fox bats. Cycloviruses are small, circular DNA viruses, commonly found in various animal species.
Puffinosis virus
A virus associated with “puffinosis,” a disease affecting puffins, causing debilitating neurological symptoms. It is transmitted by ticks.
Pultovi virus
An orthobunyavirus detected in mosquitoes, indicating its potential to cause febrile illness in humans.
Pumpkin yellow mosaic virus
A begomovirus causing severe yellow mosaic patterns and distortion of leaves in pumpkin plants, leading to significant yield reduction, transmitted by whiteflies.
Puumala virus
A hantavirus transmitted by bank voles, causing nephropathia epidemica in humans, a milder form of hemorrhagic fever with renal syndrome.
Pygoscelis adeliae papovavirus
A polyomavirus identified in Adelie penguins. Papovaviruses are a historical grouping that included papillomaviruses and polyomaviruses.