ATLANTA – More than 1 million cases of chlamydia were reported in the United States last year – the most ever reported for a sexually transmitted disease, federal health officials said Tuesday.
Officials at the Centers for Disease Control and Prevention said they think better and more intensive screening accounts for much of the increase, but added that chlamydia was not the only sexually transmitted disease on the rise.
Gonorrhea rates are jumping again after hitting a record low, and an increasing number of cases are caused by a “superbug” version resistant to common antibiotics.
Syphilis is rising, too. The rate of congenital syphilis – which can deform or kill babies – rose for the first time in 15 years.
“Hopefully we will not see this turn into a trend,” said Dr. Khalil Ghanem, an infectious diseases specialist at Johns Hopkins University’s School of medicine.
The CDC releases a report each year on chlamydia, gonorrhea and syphilis, three diseases caused by sexually transmitted bacteria.
Chlamydia is the most common. Nearly 1,031,000 cases were reported last year, up from 976,000 the year before.
The count broke the single-year record for reported cases of a sexually transmitted disease, which was 1,013,436 cases of gonorrhea, set in 1978.
Putting those numbers into rates, there were about 348 cases of chlamydia per 100,000 people in 2006, up 5.6 percent from the 329 per 100,000 rate in 2005.
About three-quarters of women infected with chlamydia have no symptoms. Left untreated, the infection can spread and ultimately can lead to infertility. It’s easily treated if caught early.
Health officials believe as many as 2.8 million new cases may actually be occurring each year.
Chlamydia infection rates are more than seven times higher in black women then whites, and more than twice as high in black women than Hispanics. But it’s a risk women of all races should consider, CDC officials said.
“If (health care) providers think young women in their practice don’t have chlamydia, they should think again,” said Dr. Stuart Berman, a CDC epidemiologist.
The gonorrhea story is somewhat different.
In 2004, the nation’s gonorrhea rate fell to 112.4 cases per 100,000 people in 2004, the lowest level since the government started tracking cases in 1941.
But since then, health officials have seen two consecutive years of increases. The 2006 rate – about 121 per 100,000 – represents a 5.5 percent increase from 2005.
Health officials don’t know exactly how many superbug cases there were among the more than 358,000 gonorrhea cases reported in 2006. But a surveillance project of 28 cities found that 14 percent were resistant to ciprofloxacin and other antibiotics.
Dr. John M. Douglas Jr., director of the CDC’s Division of Sexually Transmitted Disease Prevention, said it doesn’t look like the superbugs are the reason for gonorrhea’s escalating numbers overall, but they’re not sure what is driving the increase.
Other doctors are worried. The superbug gonorrhea has been on the rise not only in California and Hawaii, where the problem has been most noticeable, but also in the South and Midwest.
Syphilis, a potentially deadly disease that first shows up as genital sores, has become relatively rare in the United States. About 9,800 cases of the most contagious forms or syphilis were reported in 2006, up from about 8,700 in 2005. The rate rose from 2.9 cases per 100,000 people to 3.3, a 14 percent increase.
For congenital syphilis, in which babies get syphilis from their mothers, the rate rose only slightly from the previous year to 8.5 cases per 100,000 live births.
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