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chlamydia
most common sexually transmitted bacterial infection in North America; often occurs with no symptoms and is treated only after it has spread
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gonorrhea
contagious inflammation of the genital mucous membranes caused by invasion of the gonococcus, neisseria gonorrhoeae
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syphilis
infectious disease caused by a spirochete transmitted by direct intimate contact that may involve any organ or tissue over time; usually manifested first on the skin with the appearance of small, painless red papules that erode and form bloodless ulcers called chancres
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hepatitis B virus (HBV)
virus that causes inflammation of the liver as a result of transmission through any body fluid, including vaginal secretions, semen, and blood
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herpes simplex virus type 2 (HSV-2)
virus that causes ulcer-like lesions of the genital and anorectal skin and mucosa; after initial infection, the virus lies dormant in the nerve cell root and may recur at times of stress
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human immunodeficiency virus (HIV)
virus that causes acquired immunodeficiency syndrome (AIDS), which permits various opportunistic infections, malignancies, and neurological diseases; contracted through exposure to contaminated blood or body fluid
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human papilloma virus (HPV)/condyloma acuminatum
virus transmitted by direct sexual contact that causes an infection that can occur on the skin or mucous membranes of the genitals; on the skin, the lesions appear as cauliflower-like warts, and on the mucous membranes, they have a flat appearance
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