This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Treatment of sexual partner is required for all except: 
Select and explain. 
A. Gardnerella vaginalis, B. Mycoplasma genitalium, C. Trichomonas vaginalis, D. Chlamydia trachomatis
A: Gardnerella vaginalis
Answer: A: Gardnerella vaginalis 
Explanation: Ans. A. Gardnerella vaginalisGardnerella vaginalis and Mobiluncus cause bacterial vaginosis which is not a sexually transmitted disease