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: Surgery
All are true about septic ahritis except: 
Select and explain. 
A. Staph. Aureus is most common causative organism, B. Common in children, C. Affect growth plate, D. E. coli is the commonest causative organism
D: E. coli is the commonest causative organism
Answer: D: E. coli is the commonest causative organism 
Explanation: Ans. d. E. coli is the commonest causative organismIt is more common in children & malesStaphylococcus aureus is the commonest causative organism, other organism are strepto-pneumo & Gonococcus. Aspirate the joint & examine the fluid. A WBC & gram stain should be carried out immediately. Sample of fluid are also sent for full microbiological examination & tests for antibiotic sensitivity.