Vulvar and vaginal disorders.

Vulvovaginitis is the most common reason for a woman to see her gynecologist. The most common causes are bacterial vaginosis, Candida species, and Trichomonas vaginals, respectively. Human papillomavirus has become a major diagnostic and therapeutic problem. Human papillomavirus DNA testing suggests that exposure to human papillomavirus occurs frequently at birth and intermittently throughout a woman's life after the onset of sexual activity. Interferon has been shown to be effective in treating some forms of human papillomavirus.