• Azucena L Cabrera-Reyes, Ma Del Carmen Martínez-García, Gerardo Del C Palacios-Saucedo, Othón Rojas-Montes, Adriana Cajero-Avelar, and Fortino Solórzano-Santos.
• Department of Pediatrics, Zone 27 General Hospital, Tlatelolco Gynecology-Obstetrics Hospital, Instituto Mexicano del Seguro Social, Mexico City.
• Gac Med Mex. 2021 Jan 1; 157 (5): 516-521.

BackgroundA pregnant woman rectally or vaginally colonized by group B Streptococcus can infect her newborn.Patients And MethodsProspective, cross-sectional, analytical 24-month study in pregnant women. Women in labor with ≥ 36 weeks of gestation were included. Pregnancy was classified as normal or high-risk. Main risk factors of the pregnant women were analyzed. Rectal and vaginal samples were obtained, placed in Todd-Hewitt broth and subsequently inoculated in 5% sheep blood agar. Identification was carried out by biochemical tests and latex agglutination.Results3,347 pregnant women were included. Mean age was 25.6 ± 5.3 years, 95.5% received antenatal care; 2,213 (66%) had normal-risk pregnancies, and in 1,370 (41%), delivery was by cesarean section. Overall colonization was 4.3% (145/3,347), and it was higher in the 30-34 years age group (6.8%). Serotype I (58%) was the most common.ConclusionThe percentage of colonization in this population was low. A routine cervicovaginal and rectal culture program in pregnant women and the intrapartum antimicrobial prophylaxis program are controversial in our region.Copyright: © 2021 Permanyer.

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