Journal
JOURNAL OF INFECTIOUS DISEASES
Volume 192, Issue 3, Pages 394-398Publisher
OXFORD UNIV PRESS INC
DOI: 10.1086/430926
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- NIAID NIH HHS [1U01 AI 47785] Funding Source: Medline
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Lactobacilli colonizing the rectum may be a reservoir for vaginal lactobacilli. In a cross-sectional study of 531 females, vaginal and rectal colonization by lactobacilli were assessed by culture methods. A subset of isolates was identified to the species level by use of whole-chromosomal DNA probes. Lactobacillus crispatus (16%), L. jensenii (10%), and L. gasseri (10%) were the prevalent lactobacilli colonizing the rectums of 290 females. Only 13 (9%) of 147 females colonized by L. crispatus or L. jensenii vaginally and/or rectally had bacterial vaginosis (BV), compared with 12 (44%) of 27 females colonized by other H2O2-producing lactobacilli (P <.001). Cocolonization of the vagina and rectum by H2O2-producing lactobacilli was associated with the lowest prevalence of BV (5%), whereas females colonized only vaginally, only rectally, or at neither site had a successively increased risk of BV (P <.001). Lactobacillus species in the rectum may contribute to the maintenance of vaginal microflora.
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