[Maternal chemoprophylaxis against group B Streptococcus colonization. The consequences of not adopting the international recommendation]
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Updated: Jul 6, 2026

A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
Jesús Reyna-Figueroa1, Federico Javier Ortiz-Ibarra, Beatriz Pérez-Antonio
1Departamento de Infectología e Inmunología Perinatal, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Montes Urales 800, Colonia Lomas Virreyes, 11000 Delegación Miguel Hidalgo, México, DF. jesusreynaf@prodigy.net.mx
Objective:
To know the criteria which determine the chemoprophylaxis on pregnant women colonized by Streptococcus agalactiae (GBS) and the impact in our environment.
Material And Methods:
A retrospective analysis, identifying pregnant women with isolation of Streptococcus agalactiae on screening cultures, cervical swabs and urine culture. Two groups were analyzed, group 1 received chemoprophylaxis, and group 2 without chemoprophylaxis. Chi square was used to asses the difference between proportions. Chi square approximation to Poisson distribution was used to compare the means of neonatal infection.
Results:
A total of 274 cultures were reported with GBS isolation, on 261 patients; 165 (60.2%) cervical swabs, 109 (39.7%) urine culture and 13 patients from 274 (4.7%) had positive culture on both specimens. Of this 261 patients, 53 (5.6%) received chemoprophylaxis during labor (p<0.05). The CDC criteria were followed accuracy on 29.2%.
Conclusions:
There have not been established criteria for screening colonization by GBS in Mexican pregnant women.
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