[Infectious non-gonococcal urethritis in males (author's transl)].

Infectious non-gonococcal urethritis (NGU) is a sexually transmitted disease of considerable importance. The etiologic agents are bacteria, to lesser extent yeasts, parasites (Trichomonas) or viruses. A considerable part of NGU is caused by bacterial groups with peculiar properties: Mycoplasmas, which lack a rigid cell wall, and chlamydiae, which are intracellular parasites. Because of the diversity of etiologic agents and qualified microbiological diagnosis is a prerequisite for a specific and successful therapy.