Gonococcal, chlamydia, and syphilis infection positivity among MSM attending a large primary care clinic, Boston, 2003 to 2004.

Background:In the past decade, increases in syphilis and rectal gonorrhea have been reported among men who have sex with men (MSM) in the United States; however, limited sexually transmitted disease (STD) positivity data are available on MSM who receive their healthcare from primary care or general