PT - JOURNAL ARTICLE AU - Paavonen, J TI - P2.140 Time Trends of C. Trachomatis Serotype Distributions in Fertile-Aged Women in Finland AID - 10.1136/sextrans-2013-051184.0404 DP - 2013 Jul 01 TA - Sexually Transmitted Infections PG - A130--A131 VI - 89 IP - Suppl 1 4099 - http://sti.bmj.com/content/89/Suppl_1/A130.4.short 4100 - http://sti.bmj.com/content/89/Suppl_1/A130.4.full SO - Sex Transm Infect2013 Jul 01; 89 AB - The National Institute of Health and Welfare, Oulu, Universities of Oulu, Tampere and Helsinki, Finland. We studied C. trachomatis (CT) serotype-specific antibodies in Finnish women between 1980’s and 2000’s. C. trachomatis seropositive women (1,169) were available from a subcohort (11,067) of the Finnish Maternity Cohort representing the 1980’s (N = 480) and 2000’s (N = 331) for serotype specific classification by microimmunofluorescence test. Serotype distributions were comparable in the 1980’s and 2000’s, G, E and J being the most prevalent. Serotype D peaked in the 1990’s. The overall serotype profile changed first between 1980’s and 1990’s but changed back in the 2000’s. The rates of women with antibodies against two or more serotypes increased in the 1990’s, but then decreased again. In conclusion, we analysed the rates and distributions of CT serotype-specific antibodies from the 1980’s to 2000’s in fertile-aged female population in Finland. We found that CT serotype distributions varied considerably over time.