Clinical sialidase negativity suggests the absence of bacterial vaginosis. Bacterial vaginosis is a clinical syndrome characterized by a decrease in the normal flora of the genital tract and an increase in the number of bacteria such as Gardnerella and anaerobes in the vagina, and is the most common vaginal infection in women of childbearing age. Bacterial vaginosis is associated with microorganisms such as Gardnerella, which are unique to the vagina, and with the metabolized product salivary acid glycosidase. Therefore, a woman can be diagnosed with bacterial vaginosis by testing for the expression of salivary acid glycosidase, and a positive test result suggests that she has a positive test result for salivary acid glycosidase. This type of bacterial vaginitis, the treatment of drugs preferred metronidazole or ornidazole and other nitromidazole drugs, the course of treatment for 5-7 days, while in the treatment period should be prohibited from sexual intercourse.