a total of 729 asymptomatic men were screened for gonococcal urethritis with four techniques : culture of urethral specimens , culture of first-catch urine sediment ( fcus ) , an enzyme immunoassay method ( gonozyme , abbot laboratories ) for detection of gonococcal antigen in urethral specimens ( eia-sb ) and first-catch urine sediment ( eia-fcus ) .
C0018078
gonococcal urethritis
C0041967
urethral