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 an  inflamatory response to infection, it is found that the inflamatory infilterate is predominated by neutrophils for several days beyond the usual 24-48 hours. Which of the following organisms is most likely the cause of infection? \nSelect and explain. \nA. Pseudomonas, B. Staphylococci, C. Fungi, D. Virus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In most forms of acute inflammation, neutrophils predominate in the inflammatory infiltrate during the first 6 to 24 hours and are gradually replaced by monocyte-derived macrophages over 24 to 48 hours.\nIn\xa0 certain infections—for\xa0 example,\xa0those\xa0 produced\xa0by\xa0Pseudomonas bacteria—the cellular infiltrate is dominated by neutrophils for several days.\nIn viral infections, lymphocytes may be the first cells to arrive.\nIn allergic reactions, eosinophils may be a prominent cell type.\nSome hypersensitivity reactions are dominated by activated lymphocytes, macrophages, and plasma cells (reflecting the immune response).', 'role': 'assistant'}]