2005, Number 73
Risk of early neonatal infection in newborns of pregnant women colonized with Streptococcus agalactie serotype III
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ABSTRACTObjective: To establish the index of association between the genital colonization with Group B Strep (GBS) serotype III from pregnancy women and early neonatal sepsis.
Material and methods: We studied, stocks of GBS corresponding to pregnant women. Later the clinical files of mothers’ products were reviewed. We defined 2 groups: Exposed, new born from mothers with GBS serotype III infection documented, in cervical or urinary culture, and not exposed: newborns from mothers with serotypes Ia, Ib, II, IV, V or VI infection documented.
The sample size was obtained calculating difference of proportions, with a relation from 1 to 2. The statistical analysis was made by means of measures of central tendency and dispersion. The comparison between groups was made through Students T and Chi square or exact Fisher tests, depending on the variables and the expected values in the 2 tables of 2 x 2. The association force was considered.
Results: We serotype a total of 134 stocks of SGB. In the exposed group we included 42 NB of pregnant women colonized with SGB serotype III, whereas in not exposed group 92 products of pregnant women colonized with serotypes different from III.
By means of the bivaried analysis was that the SGB presence serotype III, has a RR of 5,5 (2,0 - 14, IC 95%) p ‹0.05
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