Papillomaviridae
Alphapapillomavirus
Betapapillomavirus
Chipapillomavirus
Deltapapillomavirus
Dyodeltapapillomavirus
Dyoepsilonpapillomavirus
Dyoetapapillomavirus
Dyoiotapapillomavirus
Dyokappapillomavirus
Dyolambdapapillomavirus
Dyomupapillomavirus
Dyonupapillomavirus
Dyoomikronpapillomavirus
Dyopipapillomavirus
Dyorhopapillomavirus
Dyosigmapapillomavirus
Dyothetapapillomavirus
Dyoxipapillomavirus
Dyozetapapillomavirus
Epsilonpapillomavirus
Etapapillomavirus
Gammapapillomavirus
Iotapapillomavirus
Kappapapillomavirus
Lambdapapillomavirus
Mupapillomavirus
Nupapillomavirus
Omegapapillomavirus
Omikronpapillomavirus
Phipapillomavirus
Pipapillomavirus
Psipapillomavirus
Rhopapillomavirus
Sigmapapillomavirus
Taupapillomavirus
Thetapapillomavirus
Upsilonpapillomavirus
Xipapillomavirus
Zetapapillomavirus
Papillomaviridae is an ancient taxonomic family of non-enveloped DNA viruses, collectively known as papillomaviruses. Several hundred species of papillomaviruses, traditionally referred to as "types", have been identified infecting all carefully inspected mammals, but also other amniotes such as birds, snakes and turtles. Infection by most papillomavirus types, depending on the type, is either asymptomatic (e.g. most Beta-PVs) or causes small benign tumors, known as papillomas or warts (e.g. human papillomavirus1, HPV6 or HPV11). Papillomas caused by some types, however, such as human papillomaviruses 16 and 18, carry a risk of becoming cancerous.
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