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Memorias del Instituto de Investigaciones en Ciencias de la Salud

versão On-line ISSN 1812-9528


ORTIZ, ME et al. Frequency of group B Streptococcus colonization in 35 to 37 weeks pregnant women in the San Pablo Maternal-Child Hospital. Mem. Inst. Investig. Cienc. Salud [online]. 2013, vol.11, n.2, pp.32-40. ISSN 1812-9528.

The colonization of Group B streptococcal in pregnant women is related to perinatal pathologies, being an important cause of neonatal morbi-mortality. In order to reduce this morbi-mortality, the Control Center for Infectious Diseases of United States developed a strategy that consisted in making culture of both vaginal and anal-rectal samples of all pregnant women who were in the 35-37 weeks of pregnancy. The objective of this work was to determine the colonization frequency of Group B βhemolytic streptococcus in pregnant women who were in the 35-37 weeks of pregnancy that attended the San Pablo Maternal-Child Hospital, Health Center No. 5 from April 2010 to August 2011. A cross-sectional descriptive observational study was performed. Sample collection was made by vaginal introitus and anal-rectal swabs, and then samples were placed in Stuart medium and sent to the Instituto de Investigaciones en Ciencias de la Salud for culture in blood agar, previously enriched in Todd Hewitt broth. The identification of the bacteria was made by conventional biochemical tests and confirmation by latex agglutination. The frequency of colonization found was relatively high (23.6%). The results obtained in this study allow dimensioning the problem in our country and show the necessity of the implementation of a national program for the routine detection of Group B streptococcus in pregnant women, in order to prevent perinatal and maternal morbidity and mortality by the opportune administration of prophylactic treatment.

Palavras-chave : pregnant; group B streptococcus; colonization; frequency.

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