This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection of Bones & Joints, Subject name: Orthopaedics
[{'content': 'Most common organism causing osteomyelitis: \nSelect and explain. \nA. Staph Aureus, B. Strep pneumonia, C. H. Influenza, D. E. coli', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Staph AureusRef: Maheshwari 5th ed. /168Note that responsible pathogens may be isolated in only 35- 40% of infections. Bacterial causes of acute hematogenous and direct osteomyelitis include the following:* Most common organism causing acute osteomyelitis: Staph. Aureus* MCC of osteomyelitis in sickle cell anemia patient: SALMONELLA* MCC of osteomyelitis in IV drug abuser: PSEUDOMONAS* MC organism causing osteomyelitis in open foot injury: PSEUDOMONAS* MC organism causing osteomyelitis in HIV patient: Staph. Aureus* MC organism causing osteomyelitis in case of animal bite: Pasteurella Multiocida* MC organism causing osteomyelitis in case of human bite: Eikenella Corrodens', 'role': 'assistant'}]