Prevalência de streptococcus agalactiae em gestantes usuárias de um centro materno infantil em Santa Cruz do Sul.

Abstract

Group B Streptococcus (GBS) is a microorganism that is present in the genitourinary and intestinal tract, in about 10 to 30% of pregnant women, being generally asymptomatic and possibly contaminating newborns, which can cause serious cases of meningitis, pneumonia and septicaemia. The purpose of this study was to track the rate of pregnant women colonized by GBS up until the 35th week of gestation who were treated in a maternal center. 32 pregnant women had their vaginal and rectal swabs collected in the Centro Materno Infantil, in Santa Cruz do Sul (Rio Grande do Sul) September-November in 2015. The samples obtained were inoculated in Todd-Hewitt Broth and, subsequently, subcultured in sheep blood agar plates. The CAMP test was utilized to identify GBS, confirmed by the test of enzymatic hydrolysis of L-pyrrolidonyl-beta-naphthylamide. Socio-demographic variables were studied, as well as gynecological-obstetrical backgrounds. The prevalence ratio was utilized as a risk measure, considering the significance level to be p≤0,05. The prevalence of maternal colonization caused by GBS was 6,3%. A correlation between the socio-demographic variables or gynecological-obstetrical background and GBS wasn't found. The prevalence of maternal colonization by GBS was lower than the frequency of Brazil. However, an investigation with a larger group of pregnant women is necessary.