Patients with nongonococcal urethritis usually have four or more polymorphonuclear leukocytes per high powered field when a stained smear of their urethral exudate (by swab) is done. In addition, asymptomatic sexually active men with such findings on urethral swab stain have Chlamydia trachomatis isolated in a significant proportion. A urethral Gram-stained smear showing four or more pohymorphonuclear leukocytes per high powered field, in the absence of gonorrhea, is good evidence for C trachomatis urethritis whether or not the patient is symptomatic.(R.H.R.)

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