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Reported cases of chlamydia and gonorrhea in the United States exceeded 1.4 million in 2007, according to an annual report by the Centers for Disease Control and Prevention (CDC). These diseases continue to be the most commonly reported infectious diseases in the nation and pose persistent and preventable threats to fertility in the United States.
The report, Sexually Transmitted Disease Surveillance, 2007, shows persistent racial disparities across these and other sexually transmitted diseases (STD), and a particularly heavy burden of disease among women. The report also finds continued increases in syphilis. This disease, while once on the verge of elimination, began re-emerging as a threat in 2001 and increased 15.2 percent between 2006 and 2007.
"The widespread occurrence of these diseases should serve as a stark reminder that STDs remain a serious health threat in the United States, especially for women and racial and ethnic minorities," said John M. Douglas, Jr., MD, director of CDC's Division of STD Prevention. "Left untreated, chlamydia and gonorrhea can cause infertility, affecting a woman's chance to bear children later in life. Such a severe consequence is entirely avoidable, if as a nation we work together to increase the use of proven prevention tools and make them widely available to those who need them."
Women continue to bear a disproportionate burden of the long-term health consequences of STDs. In 2007, the chlamydia rate among women was three times that of men (543.6 cases per 100,000 women, compared to 190 cases per 100,000 men). The gonorrhea rate was also higher among women (123.5 per 100,000 women, compared to 113.7 per 100,000 among men).
Although the two diseases can be easily diagnosed and treated, they often have no symptoms and go undetected. If left untreated, up to 40 percent of chlamydia and gonorrhea infections in women can result in pelvic inflammatory disease - a condition that causes as many as 50,000 women to become infertile each year. Untreated chlamydia or gonorrhea can also cause ectopic pregnancy, chronic pelvic pain, and other serious health problems.
The report found that there were more than 1.1 million chlamydia cases reported in 2007, up from about one million in 2006, making it the largest number of cases ever reported to CDC for any condition. Gonorrhea, the second most commonly reported infectious disease, had more than 350,000 cases reported in 2007. However, it is estimated that more than half of all new infections with chlamydia and gonorrhea continue to go undiagnosed, underscoring the importance of increased screening. CDC recommends annual chlamydia screening for all sexually active women under 26 years old, and supports U.S. Preventive Services Task Force recommendations to screen high-risk, sexually active women for gonorrhea.
CDC's 2007 STD surveillance report also indicates ongoing racial disparities in the three most common reportable STDs, with African-Americans bearing the greatest burden. While representing 12 percent of the U.S. population, blacks had about 70 percent of reported gonorrhea cases and almost half of all chlamydia and syphilis cases (48 percent and 46 percent respectively) in 2007. STDs take an especially heavy toll on black women 15 to 19 years of age, who account for the highest rates of both chlamydia (9,646.7 per 100,000 population) and gonorrhea (2,955.7 per 100,000 population) of any group. STDs in this age group are of particular concern because of the potential threat of these two diseases to a woman's fertility.
Studies have shown that one of the most important social determinants of sexual health is socioeconomic status. Higher rates of poverty among blacks than whites, and socioeconomic barriers to quality healthcare and STD prevention and treatment services have been associated with higher prevalence and incidence of STDs among racial and ethnic minorities.
"The racial disparities in rates of STDs are among the worst health disparities in the nation for any health condition," stressed Douglas. "We must intensify efforts to reach these communities with needed screening and treatment services. Testing and the knowledge of infection is a critical first step toward reducing the continued consequences of these diseases."
Syphilis, a disease close to being eliminated as a public health threat less than a decade ago, has increased each year since 2000 and remains a serious threat to the health of gay and bisexual men.
In 2007, men who have sex with men (MSM) continued to account for the majority of primary and secondary (P&S) syphilis cases, representing 65 percent of the 11,466 P&S syphilis cases reported. Increased transmission among MSM is believed to be the primary driver of increased rates of syphilis overall in the United States. Syphilis among MSM is of particular concern because it can facilitate HIV transmission and lead to irreversible complications such as strokes, especially in those who already have HIV. CDC recommends that all MSM be tested for syphilis at least annually.
Additionally, while P&S syphilis continues to occur at substantially lower levels among women than men (1.1 cases per 100,000 among females compared to 6.6 among males), syphilis rates have been increasing among women and infants in recent years, reversing years of decline in these populations. Syphilis rates among women have increased since 2004, and the rate of congenital syphilis increased for the second consecutive year in 2007. Because untreated syphilis can be transmitted from a pregnant woman to her infant and result in stillbirths, infant deaths, or severe complications in children who survive, CDC recommends that all women be screened for syphilis during the early stages of pregnancy.
To reduce the toll of STDs and protect the health of millions of Americans, expanded prevention efforts are urgently needed. CDC estimates that almost 19 million new sexually transmitted infections occur each year, and almost half of those are among 15- to 24-year-olds. In addition to the threat of infertility, increased risk of HIV acquisition, and other health risks, STDs also have a substantial economic impact. CDC estimates STDs cost the U.S. healthcare system as much as $15.3 billion annually.
CDC supports a comprehensive approach to STD prevention through screening, treatment, and behavioral interventions, with a focus on reducing health disparities, especially those occurring among racial and ethnic groups. To further progress against the most widespread reportable STDs, CDC, along with the Partnership for Prevention and eight other leading STD organizations, recently established the National Chlamydia Coalition. CDC also has been working with partners and community leaders across the nation on syphilis elimination efforts since 1999, yet successes in some areas and populations continue to be offset by increases in others, as programs must continually shift efforts to address emerging needs. Ultimately, successful elimination of this disease will require intensified efforts at the federal, state and local level to reach the diverse and expanded populations now at risk.
The full report is available at http://www.cdc.gov/std/stats07/
Source: U.S. Department of Health and Human Services