SUMMARY Trichomonas vaginalis infections have been associated with other diseases so that epidemiological studies of the parasite are important and help to prevent the spread of the disease. This study aimed to determine the prevalence of T. vaginalis in female patients of 19 counties in southwestern Rio Grande do Sul, Brazil. For diagnosis, was used direct examination, followed by applying a socio-epidemiological questionnaire. We analyzed 300 women and 9% were infected by Trichomonas vaginalis. The highest frequency occurred in women between 18 and 39 years old, single/divorced/widowed, whose family income was at one minimum wage or less, and they had not completed the primary school. Statistically significant risk factors were: women reporting two or more sexual partners in the last year were 3.3 times more likely to acquire the parasite, and those in use of oral contraceptives were 2.7 times more likely to have T. vaginalis. Importantly, 33% of the asymptomatic women were infected, and most of the negative results were from women presenting symptoms consistent with the infection. The findings emphasize that it is necessary to expand the knowledge of individuals about the disease, especially among women with the above mentioned risk factors and also to include the regular screening of Trichomonas vaginalis infections in health centers.

This study aimed to measure the level of awareness of Trichomonas vaginalis / trichomoniasis and other sexually transmitted diseases (STDs), in 300 women from 19 municipalities in the southwest region of Rio Grande do Sul, Brazil, who sought the gynecology sector of the Basic Healthcare Centers in the Municipality of Bagé from January to June 2013. The data were collected through a semi-structured questionnaire, and the results were tabulated and organized using Excel® 2010 software. Only 5.7% of the participants said they were aware of T. vaginalis / trichomoniasis and had a little information on HIV and Aids in reference to other STDs. Schooling alone was significant (p = 0.0135), as women who had a high school diploma or higher education were 6.6 times more likely to be aware of T. vaginalis. There is, therefore, a need to devise better educational campaigns, addressing this and other STDs, such as trichomoniasis, given the lack of knowledge about this parasite, its high frequency and possible escalation.

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