ABSTRACT
EPIDEMIOLOGY/INCIDENCE Worldwide, it is estimated that the incidence of trichomoniasis is 240 million new cases annually between men and women. The prevalence worldwide was estimated to be around 152 million [1]. Developing countries account for a disproportionate number of cases. Trichomoniasis affects approximately 3.7 million and 80,000 nonpregnant and pregnant women in the United States annually [2]. The frequency of infection in European women is similar. The WHO estimates 78 million new infections annually in Africa [3]. In contrast to bacterial sexually transmitted infections (STIs), such as Neisseria gonorrhoeae and Chlamydia trachomatis, T. vaginalis infection rates are as high or higher in middle-aged women when compared to adolescents. Incidence is highest among women with multiple sexual partners and in populations with high rates of other sexually transmitted infections.
