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: Pathology
[{'content': 'In community-acquired acute bacterial sialadenitis, the most common causative pathogen is: \nSelect and explain. \nA. S. aureus, B. S. albus, C. S. salivarius, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In community-acquired acute bacterial sialadenitis, the most common causative pathogen is S. aureus, which can be eradicated using an antibiotic with Gram-positive coverage such as amoxicillin with clavulanate or clindamycin.', 'role': 'assistant'}]