| Cervical erosion is a pathological change of chronic cervicitis,it is one of the commonly pathological change in department of gynaecology and obstetrics. The cause of cervical erosion is complex.It hasn't been elucidated up to now. some researchers suspect the cause of bacterial infection from mechanical injury of deliver, operation and others.While other researchers thought it relates to endocrine disturbance . Recently ,with the development and application of technique of viral isolation and cultivation,more and more evidence indicate that viral infection is one of the main reasons that causes cervical erosion .HPV,HSV-â…¡and HCMV are the common virus.HPV is usually one of virus infecting the female genital tract .It is a set of pathogenicity DNA virus that multiply in the host cell. Study indicates infection of HPV to cervix is usually in the transition zones of cervix endepidermis which easily develops squamo- stele dystopy,so it can result in cervical erosion.HPV can infect cervix reserve cell or metaplasia epithelize through little erosio.Now HPV DNA has diverged more than 100 species, more than 30 species are related to cervix infection and pathological changes.Accordingly virulence is divided into two types .one is high risk type(HPV16.18 type)and the other is hypo- risk type(HPV6.11 type) . HPV6.11 type is mainly result to scyto- mucous membrane cell mamilla pathological changes,is related to condyloma accuminatum,HPV16.18 type mainly can cause cellula epithelialis... |