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Gaceta médica de México

versão On-line ISSN 2696-1288versão impressa ISSN 0016-3813

Resumo

CABRERA-REYES, Azucena L. et al. Cervicovaginal and rectal colonization by group B Streptococcus in Mexican women with full-term pregnancies. Gac. Méd. Méx [online]. 2021, vol.157, n.5, pp.533-538.  Epub 13-Dez-2021. ISSN 2696-1288.  https://doi.org/10.24875/gmm.21000466.

Background:

A pregnant woman rectally or vaginally colonized by group B Streptococcus can infect her newborn.

Patients and methods:

Prospective, 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.

Results:

3,347 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.

Conclusion:

The 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.

Palavras-chave : Cervicovaginal colonization; Group B streptococcus; Pregnancy.

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