Chlamydia - the risks to women

They found:

"Compared with women with uncircumcised partners, those with circumcised
partners had a 5.6-fold reduced risk of testing seropositive for C.
trachomatis"

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Chlamydia trachomatis Infection in Female Partners of Circumcised and
Uncircumcised Adult Men.

Castellsague X, Peeling RW, Franceschi S, de Sanjose S, Smith JS, Albero
G, Diaz M, Herrero R, Munoz N, Bosch FX.

Cancer Epidemiology and Registration Unit, Institut d'Investigacio
Biomedica de Bellvitge (IDIBELL), Institut Catala d'Oncologia,
L'Hospitalet de Llobregat, Barcelona, Spain.

Male circumcision has been shown to reduce the risk of acquiring and
transmitting a number of venereal infections. However, little is known
about the association between male circumcision and the risk of
Chlamydia trachomatis infection in the female partner. The authors
pooled data on 305 adult couples enrolled as controls in one of five
case-control studies of invasive cervical cancer conducted in Thailand,
the Philippines, Brazil, Colombia, and Spain between 1985 and 1997.
Women provided blood samples for C. trachomatis and Chlamydia pneumoniae
antibody detection; a type-specific microfluorescence assay was used.
Multivariate odds ratios were computed for the association between male
circumcision status and chlamydial seropositivity in women. Compared
with women with uncircumcised partners, those with circumcised partners
had a 5.6-fold reduced risk of testing seropositive for C. trachomatis
(82% reduction; odds ratio = 0.18, 95% confidence interval: 0.05, 0.58).
The inverse association was also observed after restricting the analysis
to monogamous women and their only male partners (odds ratio = 0.21, 95%
confidence interval: 0.06, 0.72). In contrast, seropositivity to C.
pneumoniae, a non-sexually-transmitted infection, was not significantly
related to circumcision status of the male partner. These findings
suggest that male circumcision could reduce the risk of C. trachomatis
infection in female sexual partners.

http://www.ncbi.nlm.nih.gov/entrez/q...149&query_hl=1