This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sexually Transmitted Disease in the Female, Subject name: Gynaecology & Obstetrics
Nongonococcal urethritis is caused by: 
Select and explain. 
A. Chlamydia, B. LGV, C. Syphilis, D. Gardnerella vaginalis
A: Chlamydia
Answer: A: Chlamydia 
Explanation: Ans. is a, i.e. ChlamydiaRef: Harrison 17th/ed, p823; Current diagnosis and treatment of STI p15Non gonococcal urethritis is caused by:* Chlamydia trachomatis (30-40%)* Ureaplasma urealyteum* Mycoplasma genitalium* E coli* Ureaplasma urealyticum* Trichomonas vaginalis* Herpes simplex virusRare Cases:* Anaerobic bacteria* AdenovirusManagement:Azithromycin 1g orally in a single dose or doxycycline 100mg orally twice a day x7 daysAlternative = Erythromycine 500mg four times a day x7 days