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
[{'content': 'Which of the following organisms would typically be found in a patient with atypical community-acquired pneumonia? \nSelect and explain. \nA. Staphylococcus aureus, B. Pseudomonas spp., C. Streptococcus pneumonia, D. Legionella pneumophilia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: H. influenza and S. pneumonia are organisms which are usually responsible for community-acquired pneumoniA. S. aureus and Pseudomonas spp. are usually found in patients with hospital-acquired pneumoniA. L. pneumophilia, along with Chlamydia spp. and Mycoplasma pneumonia, are the atypical pneumonia-causing organisms. A urinary antigen test is routinely used for the detection of Legionella spp. Serological tests can be used for the detection of Mycoplasma and Chlamydia spp. and also Legionella spp.', 'role': 'assistant'}]