Applied Evidence

An STI upsurge requires a nimble approach to care

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References

Human papillomavirus

Condylomata acuminata (genital warts) are caused by human papillomavirus (HPV), most commonly types 6 and 11, which manifest as soft papules or plaques on the external genitalia, perineum, perianal skin, and groin. The warts are usually asymptomatic but can be painful or pruritic, depending on size and location.

Diagnosis is made by visual inspection and can be confirmed by biopsy if lesions are atypical. Lesions can resolve spontaneously, remain unchanged, or grow in size or number.

Treatment. The aim of treatment is relief of symptoms and removal of warts. Treatment does not eradicate HPV infection. Multiple treatments are available that can be applied by the patient as a cream, gel, or ointment or administered by the provider, including cryotherapy, surgical removal, and solutions. The decision on how to treat should be based on the number, size, and location of lesions; patient preference; cost; convenience; and the modality’s adverse effects (TABLE 214).

HPV-associated cancers and precancers. This is a broad (and separate) topic. HPV types 16 and 18 cause most cases of cervical, penile, vulvar, vaginal, anal, and oropharyngeal cancer and precancer.39 The USPSTF, the American Cancer Society, and the American College of Obstetricians and Gynecologists all have recommendations for cervical cancer screening in the United States.40 Refer to guidelines of the ASCCP for recommendations on abnormal screening tests.41

Prevention of genital warts. The 9-­valent HPV vaccine available in the United States is safe and effective and helps protect against viral types 6, 11, 16, 18, 31, 33, 45, 52, and 58. Types 6 and 11 are the principal causes of genital warts. Types 16 and 18 cause 66% of cervical cancer. The vaccination series can be started at age 9 years and is recommended for everyone through age 26 years. Only 2 doses are needed if the first dose is given prior to age 15 years; given after that age, a 3-dose series is utilized. Refer to CDC vaccine guidelines42 for details on the exact timing of vaccination.

Trichomoniasis can manifest as a yellowgreen vaginal discharge with or without vaginal discomfort, dysuria, epididymitis, and prostatitis; most cases, however, are asymptomatic.

Vaccination for women ages 27 to 45 years is not universally recommended because most people have been exposed to HPV by that age. However, the vaccine can still be administered, depending on clinical circumstances and the risk for new infection.42

Syphilis

Caused by the spirochete Treponema pallidum, syphilis manifests across a spectrum—from congenital to tertiary. The inability of medical science to develop a method for culturing the spirochete has confounded diagnosis and treatment.

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