The Centers for Disease Control and Prevention released its annual report of sexually transmitted diseases compiling information on gonorrhea, chlamydia and syphilis from 2009.

According to the CDC, since 2000, the largest increase in syphilis cases have been among men who have sex with men. The CDC reports that MSM constitute for nearly two-thirds (62%) of all syphilis cases. In 2000, that number was just four percent. Syphilis is listed as a "major health problem" in the south and urban areas.

The CDC says it is working with local health partners to implement its Syphilis Elimination Plan using targeted information to reach those at greatest risk. The CDC urges sexually active MSM to get tested yearly for gonorrhea, chlamydia, syphilis and HIV.