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Am J Reprod Immunol. 2004 Aug;52(2):106-12.

Relationship between cervical mucus interleukin-8 concentrations and vaginal bacteria in pregnancy.

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1
Department of Obstetrics and Gynecology, Toyama Medical and Pharmaceutical University, Toyoma, Japan.

Abstract

PROBLEM:

High interleukin (IL)-8 concentration in cervical mucus in the second trimester is a risk factor for premature birth. We investigated the relationship between vaginal pathogens and IL-8 in cervical mucus.

METHOD OF STUDY:

In 501 women with single pregnancy, vaginal secretions were cultured for bacteria and cervical mucus IL-8 concentrations were measured between 20 and 24 gestational weeks.

RESULTS:

Lactobacillus species were detected in 56.0% of 84 subjects with high IL-8 (> or =377 ng/mL), significantly less often than in 417 subjects with IL-8 below 377 ng/mL (84.7%; P < 0.0001). Anaerobic pathogens were detected in 83.3% of high IL-8 subjects, significantly more often than in normal IL-8 subjects (43.9%; P < 0.0001). By multivariate analysis, cervical IL-8 was significantly high only in subjects without Lactobacillus species; they showed a significantly higher prematurity rate than Lactobacillus-positive subjects.

CONCLUSIONS:

Absence of vaginal Lactobacilli was associated with increased cervical IL-8 and increased risk of premature delivery.

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