This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Which one of the following gram positive organism is most common cause of UTI among sexually active women- \nSelect and explain. \nA. Staphylococcus epidermidis, B. Staphylococcus aureus, C. Staphylococcus saprophyticus, D. Enterococcus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Staphylococcus saprophyticus Staph saprophyticus . Staph saprophyticus may be present on normal human skin and the periurethral area and can cause urinary tract infection, paicularly in sexually active young women. . Staph saprophyticus strains causing UTI are usually sensitive to most antibiotics, except nalidixic acid. . Staph saprophyticus is novobiocin resistant.", 'role': 'assistant'}]