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Racial Differences in Chlamydia Reported

Researchers Say Socioeconomic Differences Are the Most Likely Cause
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May 11, 2004 -- Young blacks are six times as likely as young whites to be infected with chlamydia, and infection rates are nearly twice as high in the South as in the Northeast, according to a study of how common these sexual transmitted diseases are in young adults in the U.S.

Overall, the study shows that approximately 4% of young adults in the U.S. are infected with Chlamydia, a common sexually transmitted disease (STD). Women were only slightly more likely to be infected than men, but the difference was not highly significant, researcher William C. Miller, MD, PhD, tells WebMD. For this reason, he says infection control efforts -- such as screening for infection -- should include both sexes instead of targeting females alone, as is now the case.

Untreated chlamydial infection in women can lead to pelvic inflammatory disease, infertility, ectopic pregnancy, and possibly cervical cancer. It can also increase the risk of infection with HIV.

"This is a sexually transmitted disease, so unless infection control efforts include both sexes they probably won't have a major impact on infection rates," he says.

STD expert David Eschenbach, MD, of the University of Washington, agrees.

"The only hope we have of reducing the overall rate of chlamydial infections is to screen both men and women," says Eschenbach, who chairs the university's obstetrics and gynecology department. "Screening men isn't even on most people's radar screen, but it should be."

Healthcare Access Is Key

The study by Miller and colleagues from the University of North Carolina at Chapel Hill involved a nationally representative sample of more than 14,000 young adults between the ages of 18 and 26. The young adults were tested for Chlamydia infection.

Infection rates varied little by age, but widely by ethnicity. Approximately 2% of young, white adults participating in the study were infected with chlamydia, compared with 12% of blacks and 6% of Latinos. Asian men had the lowest rate of infection -- roughly 1%.

The study also looked at rates of infection of another STD -- gonorrhea. Overall the rates of infection were low but again higher infection rates were seen among young blacks (2%) than young whites (0.10%).

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