Isolation of Branhamella (Neisseria) catarrhalis from men with urethritis.

Branhamella (Neisseria) catarrhalis was recovered from urethral exudates of three men with acute urethritis. In all cases gram stain of the urethral exudates revealed intracellular gram-negative diplococci morphologically compatible with Neisseria gonorrhoeae. Branhamella (Neisseria) catarrhalis should be considered as a potential cause of acute urethritis in men with urethral discharge microscopically consistent with, but culture-negative for, N. gonorrhoeae.