Non-gonococcal urethritis (NGU); Non-specific urethritis (NSU); Urethritis Waelsch; Waelsch's disease
Chlamydia are obligatory intracellular bacteria. The most important species is Chlamydia trachomatis with 15 serotypes, which are responsible for various diseases. The serotypes A–C cause endemic trachoma, which is primarily found in tropical regions and often leads to blindness. The serotypes D-L cause genital infections and conjunctivitis as well as neonatal infections. Lymphogranuloma venereum is due to an infection with the serotypes L1–L3. Worldwide, Chlamydia associated urogenital infections, which belong to the non‐gonococcal urethritis (NGU) group, are very common. The incubation period lasts 1–3 weeks. In 75% of the women and 25% of the men, the infection is asymptomatic. Possible symptoms are vaginal discharge and – especially in men – pa...