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Nongonococcal Urethritis
1996 Case Definition
Clinical description
Urethral inflammation that is not the result of
infection with Neisseria gonorrhoeae. Urethral inflammation
may be diagnosed by the presence of one of the following criteria:
- A visible abnormal urethral discharge, or
- A positive leukocyte esterase test from a male
aged less than 60 years who does not have a history of kidney
disease or bladder infection, prostate enlargement, urogenital
anatomic anomaly, or recent urinary tract instrumentation,
or
- Microscopic evidence of urethritis (greater
than or equal to 5 white blood cells per high-power field)
on a Gram stain of a urethral smear
Laboratory criteria for diagnosis
Case classification
Confirmed: a clinically
compatible case in a male in whom gonorrhea is not found, either
by culture, Gram stain, or antigen or nucleic acid detection
Comment
Nongonococcal urethritis is a clinical diagnosis
of exclusion. The syndrome may result from infection with any
of several agents (see Chlamydia
trachomatis, Genital Infection ). If gonorrhea and chlamydia
are excluded, a clinically compatible illness should be classified
as NGU. An illness in a male that meets the case definition of
NGU and C. trachomatis infection should be classified as chlamydia.
See also:
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