A 25 year old incarcerated gentleman presents with dysuria and urethral discharge. The discharge is watery, and microscopic examination is shown above. Although diagnostic tests include culture, direct immunofluorescence, ELISA, and nucleic acid amplification techniques (NAAT), you choose to do NAAT because it can be performed on a urine specimen and has the highest sensitivity and specificity.
Challenge: What's your diagnosis?
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Cloak.
This is Chlamydia trachomatis causing urethritis. Chlamydia comes from the Greek word for “cloak.” The image shows polymorphonuclear leukocytes.
Source: UpToDate; CDC.
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