What symptom does human papillomavirus have

summary

Most people don't know about human papillomavirus, but many people will encounter it in their life. Therefore, we need to understand that human papillomavirus is a kind of papillomavirus, which can infect the epidermis and mucous membrane of human body. About 130 types of HPV are identified. Some types of HPV can cause warts or cancer after invading human body, but others have no symptoms. About 30 to 40 types of HPV can be transmitted to the genitals and surrounding skin through sexual behavior, and some of them can cause genital warts. If repeatedly infected with some high-risk HPV types without warts and other symptoms, they may develop into precancerous lesions, or even invasive cancer. After research, 99.7% of cervical cancer is caused by HPV infection. Let's share some experience.

What symptom does human papillomavirus have

First, HPV is a member of genus a of lactulovirus family. It is a small DNA virus that infects epidermis and mucous squamous epithelium. Human skin keratinocytes / mucosal squamous epithelial cells are the natural hosts of these cells.

Second: the diameter is 52-55nm, no coating, normal 20hedral structure, with 72 shells on the surface. The viral genome is a double stranded circular DNA molecule. It does not spread through the blood stream, does not produce viremia, and is not easy to be recognized by the immune system.

Third, it is highly species-specific, and its natural host is human keratinocytes / mucosal squamous epithelial cells. According to the homology of HPV, more than 120 types have been found.

matters needing attention

Actinic keratosis, cutaneous squamous cell carcinoma, basal cell carcinoma, malignant melanoma, seborrheic keratosis, trichothecal cyst, papillary syringocystadenoma, multiple plantar epidermal cyst, lichen sclerosus, arsenic keratosis, syringoma, eye tumor (papilloma, squamous cell carcinoma, retinoblastoma), cervical cancer, esophageal cancer, lung cancer.