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    Chlamydia May Affect 10% of Young Men

    Study: Most Common STD Produced No Symptoms in 90% of Those Infected
    WebMD Health News

    May 22, 2003 -- The most common sexually transmitted bacterial infection may be even more common than previously believed. Although often considered primarily a woman's health problem, a new study by British researchers suggests that chlamydia may also afflict one in 10 young men -- a rate at least five times higher than noted in some previous research.

    What's more, in studying infection rates of chlamdyia among 800 army recruits, the researchers found that nearly 90% of those who tested positive for chlamydia showed no obvious symptoms. In other studies in both the U.S. and U.K., only about half of infected men, along with three in four women, displayed no symptoms.

    "The clear message is that most men with chlamydia have no symptoms," says the study's lead researcher, Gordon Scott, FRCP, of Edinburgh Royal Infirmary, whose findings appear in the May 24 issue of The Lancet. "Many studies have shown about one in 10 women are infected, and now we have some evidence that shows, not surprisingly, that men are just as likely to be infected."

    What is surprising, however, is that his study participants -- men in their late teens and 20s -- reported having an average of only one sexual partner in the previous six months, the typical rate for other men living in the U.K. The highest rates of infection are usually seen in persons with multiple sex partners and not using barrier contraception. "This confirms that you don't have to have a lot of partners to pick up a chlamydia infection," Scott tells WebMD.

    But it does indicate the importance of wearing condoms -- and being screened regularly for the infection, which is caused by the Chlamydia trachomatis bacterium and spread through unprotected sex. Chlamydia infects about 3 million Americans each year -- occurring 30 times more often than syphilis and six times more frequently than genital herpes, according to the CDC.

    "While chlamydia doesn't carry the same serious consequences for men as HIV or some of the other sexually transmitted diseases, it's further assurance that condoms should be utilized in sexual activity," says Martin Resnick, MD, president of the American Urological Association and chairman of urology at Case Western Reserve School of Medicine.

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