Urethritis laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Seyedmahdi Pahlavani, M.D. [2]

Laboratory Findings

Urethritis is considered on the basis of any of the following:

1- Mucoid, mucopurulent, or purulent discharge on examination.

2- Gram stain of urethral secretions demonstrating ≥2 WBC per field

3- Positive leukocyte esterase test on first-void urine or microscopic examination of sediment from a spun first-void urine demonstrating ≥10 WBC per high power field.

Gram Stain

• The presence of PMNs without any visible organisms is consistent with nongonococcal urethritis.
• Presumed gonococcal infection is established by documenting the presence of WBC containing intracellular purple diplococci in gram stain.