Papillomaviridae

Papillomaviridae is a family of DNA viruses that infect the skin and mucous membranes of humans and a variety of animals. The name is derived from papilloma, which describes the benign tumor type that human papillomaviruses can cause.

Taxonomy

Papillomaviridae is a family of viruses that includes five subfamilies: Firstpapillomavirinae, Secondpapillomavirinae, Thirdepapillomavirinae, Fourthpapillomavirinae, and Fifthpapillomavirinae. These subfamilies are further divided into genera, species, and individual viruses.

Structure

Papillomaviruses are non-enveloped viruses with an icosahedral capsid. The capsid is made up of 72 capsomeres, each of which is composed of the viral protein L1. Inside the capsid is a circular, double-stranded DNA genome.

Life cycle

The life cycle of papillomaviruses is closely tied to the differentiation of the host cell. Infection begins when the virus binds to the basement membrane of a stratified squamous epithelium. The virus then enters the basal cell layer, where it begins to replicate.

Disease

Papillomaviruses are best known for causing warts or papillomas. However, some types of papillomaviruses, particularly certain types of human papillomaviruses, can lead to cancer.

Prevention and treatment

Prevention of papillomavirus infection can be achieved through vaccination. The HPV vaccine is effective against the most common types of human papillomaviruses that cause cervical cancer. Treatment of papillomavirus infections is primarily focused on the removal of warts and the treatment of cancers.

See also

• HPV vaccine
• Human papillomavirus infection
• Cervical cancer

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