Serotypes of Chlamydia trachomatis and risk for development of cervical squamous cell carcinoma

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Abstract

Context: Human papillomavirus (HPV) infection has been established as a cause of cervical cancer. Epidemiologic studies suggest that Chlamydia trachomatis infection also confers increased risk for cervical squamous cell carcinoma (SCC), Whether this risk is serotype-specific is unknown. Objective: To study the association between exposure to different C trachomatis serotypes and subsequent development of cervical SCC. Design and Setting: Longitudinal, nested case-control study within a cohort of 530000 women who provided samples to serum banks in Finland, Norway, and Sweden. The data files were linked to respective national cancer registries. Subjects: One hundred twenty-eight women who had developed invasive cervical SCC at least 12 months following Serum donation. Each case had 3 matched controls. Main Outcome Measure: Risk for the development of cervical SCC by IgG antibodies to 10 different C trachomatis Serotypes, adjusted for antibodies to HPV types 16, 18, and 33 and for serum cotinine levels. Results: Of specific C trachomatis serotypes, serotype G was most strongly associated with SCC (adjusted odds ratio [OR], 6.6; 95% confidence interval [CI], 1.6-27.0). Other serotypes associated with SCC were I (OR, 3.8; 95% CI, 1.3-11.0) and D (OR, 2.7; 95% CI, 1.3-5.6). Presence of serum IgG antibodies to more than 1 serotype increased the adjusted ORs for SCC (P

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Anttila, T., Saikku, P., Koskela, P., Bloigu, A., Dillner, J., Ikäheimo, I., … Paavonen, J. (2001). Serotypes of Chlamydia trachomatis and risk for development of cervical squamous cell carcinoma. JAMA, 285(1), 47–51. https://doi.org/10.1001/jama.285.1.47

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