This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'In pontaic fever, which antigen is seen in urine- \nSelect and explain. \nA. Group specific antigen of Legionella serogroup- 1 (LP 1), B. Group specific antigen of L egionella serogroup- 1. (LP 2), C. Group specific antigen of Legionella serogroup- 4 (LP 4), D. Group specific antigen of Legionella serogroup- 6 (LP 6)', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Group specific antigen of Legionella serogroup-1 (LP1) o The examination of urine for legionella antigen by ELISA is a rapid and specific method for identifying L pneumophila,o However, disadvantage of urine antigen test is that it only detects Legionella pneumophila serogroup 1 (LP-1) and negative urinary antigen test does not exclude infection with Iegionellae other than L pneumophila serogroup-1.o Only culture can detect non-LPl strains (strains other than serogroup-1).", 'role': 'assistant'}]