Recurrence of group B streptococci colonization in subsequent pregnancy.

Abstract:

OBJECTIVE:To estimate the prevalence of group B streptococci (GBS) colonization in a subsequent pregnancy in women with and without GBS colonization in an index pregnancy. METHODS:A retrospective cohort study of women who had two consecutive deliveries with the availability of GBS culture result at 35 to 37 weeks of gestation or the diagnosis of GBS colonization by urine culture for both pregnancies was undertaken. Women in the index pregnancy with GBS genitourinary tract colonization were compared by culture date with the next woman that screened negative for GBS colonization. To detect a doubling of GBS colonization from 20% to 40% would require 91 women in each arm at P<.05 with a power of 80%. Risk factors for GBS colonization were ascertained. Univariable and conditional logistic regression analyses were performed. P<.05 was considered statistically significant. RESULTS:A total of 102 women positive for GBS genitourinary colonization were compared with controls. The rate of recurrence for GBS colonization (53%) was significantly higher when judged against women GBS negative in their index pregnancy (15%) (adjusted odds ratio 11.7, 95% confidence interval 3.5-38.9, P<.01). Women who were GBS positive in the index pregnancy were more often of African-American race and less likely to be nulliparous or smoke tobacco. CONCLUSION:Women with GBS colonization are at increased risk of GBS colonization in a subsequent pregnancy. Prior GBS colonization should be considered in the algorithm to treat unknown GBS status during term labor.

journal_name

Obstet Gynecol

authors

Turrentine MA,Ramirez MM

doi

10.1097/AOG.0b013e31817f5cb9

subject

Has Abstract

pub_date

2008-08-01 00:00:00

pages

259-64

issue

2 Pt 1

eissn

0029-7844

issn

1873-233X

pii

112/2/259

journal_volume

112

pub_type

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