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Sexual Conditions Health Center

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Twice Yearly Chlamydia Tests Recommended for Young Women

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WebMD Health News

Feb. 9, 2001 -- Nearly one-third of young women who came to a medical clinic in Baltimore had a sexually transmitted infection that, if left untreated, could result in infertility. And not many of them knew it -- or had any symptoms.

This high rate of chlamydia, a bacterial infection that is easily cured with antibiotics, so alarmed researchers that they are recommending that all sexually active girls and women under age 25 have a test to detect the illness at least every six months. Their study appears in the February issue of the journal Sexually Transmitted Infections.

According to the researchers, an estimated 3 million cases of chlamydia are diagnosed in the U.S. each year, making it the most frequently reported infectious disease in the nation and the most common sexually transmitted disease caused by bacteria. Still, this number is believed to be lower than the actual number of cases. Chlamydia is also the most common preventable cause of serious gynecological problems such as infertility, chronic pelvic pain, and ectopic pregnancy, a potentially fatal condition in which the embryo is implanted outside of the uterus.

Seventy-five percent of women and 50% of men who have chlamydia show no symptoms and can spread the disease unknowingly. Current medical guidelines call for sexually active young women to be tested for this infection once a year or whenever they have a pelvic exam. However, newer tests have been developed that use a urine sample to determine if an infection is present, which means that women can more easily be screened than in the past. In addition, a one-dose antibiotic has also become available to treat this infection.

Researchers from the Johns Hopkins University and the CDC analyzed medical information from nearly 4,000 females aged 12-60 who sought care at a Baltimore facility or school clinic to determine the rate of chlamydia among the women. They found more than 30% of those under age 25 had the infection, compared to nearly 10% of women older than 25.

Baltimore City has one of the highest rates of sexually transmitted diseases in the nation. The study also showed that the younger women were frequently reinfected, some in a little more than 7 months from their first infection, most likely because they were reinfected by the same partner. The research was conducted from 1994 to 1997.

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