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Show Infectious Diseases Chlamydia (ICD-9=99.5, ICD-10=A55-A56) Compiled by Jennifer Ha and Jackie Grant 2002 Utah Chlamvdia Cases: 3,078 Chlamydia is a sexually transmitted infection caused by the bacteria Chlamydia trachomatis, and is the most commonly reported notifiable disease in the country. A large majority of infected patients are asymptomatic (75% of women, 50% of men). Women who do show signs of an infection generally experience a vaginal discharge, lower abdominal pain, and bleeding between menstrual periods. Men will generally experience a urethral discharge. If left untreated, Chlamydia may produce serious complications, such as pelvic inflammatory disease, premature labor, ectopic pregnancy (which is the leading cause of death in the first trimester), infertility, and epididymitis in men. From 1987 through 2001, the national incidence of Chlamydia increased from 50.8 to 278.3 cases per 100,000 population. This dramatic increase likely reflects expanded and more sensitive screening, and improved reporting. Historically, the incidence of Chlamydia in Utah is less than one half that of the nation (Table 1). In 2001, Utah saw an increase in reported cases, with an incidence rate of 134.5, up 37% from 2000's 98.1 rate, but still less than half the national rate of 278.3. This increase was mostly due to increases in detection and reporting. In both the state and the U.S., women test positive for Chlamydia at about four times the rate of men (Table 2). This may be because women are more regularly screened for the infection. Most infections are reported in 15-24 year-old females. Table 1. Incidence per 100,000 Population of Chlamydia, Utah and I I.S. 1997-2001. Incidence (per 100,000) Year Utah U.S. Utah/U.S. 1997 86.2 209.4 0.41/1 1998 105.2 236.7 0.44/1 1999 104.2 253 0.41/1 2000 98.1 252.1 0.39/1 2001 134.5 278.3 0.48/1 Table 2. Incidence per 100,00 Population of Chlamydia by Sex, Utah and U. S. 1997-2001. Males Females (per 100,000) (per 100,000) Year Utah U.S. Utah US. 1997 40.7 70.5 131.3 341.8 1998 56.8 84.1 153.0 380.8 1999 56.8 94.1 151.0 403.1 2000 51.8 99.9 144.5 397.3 2001 78.8 113.9 190.2 435.2 Sources Centers for Disease Control, Division of Sexually Transmitted Diseases. STD Surveillance, 2001. [Online] http://www.cdc Tahles2001 .pdl; http://wwvv.cdc.g{>v/richstp/dstd/diseasejnl:aht3n. Attained 8/2/2003. lW M.s/20 >jJ!iL Utah's Health: An Annual Review Volume DC |
