This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Legionella, Subject name: Microbiology
[{'content': 'True about legionella - \nSelect and explain. \nA. Readily grows in simple media, B. Non-motile, C. BCYE is selective medium, D. Capsulated', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., BCYE is selective medium Legionellao Legionella is gram-negative, noncapsulated coccobacillus which is motile by polar or subpolar flagella.o It is best visualized by direct flurescent antibody (DFA).o Most common species infecting man is L pneumophila (most common serogroup 1). Other important species is L. micdadei (Pittsburgh pneumonia agent) which is partial acid fast.o At least 14 serogroups of L. pneumophila have been identifiedo L. pneumophila serogroup l (SG 1) accounts nearly all severe infections.o L. pneumophila serogroup 6 is more commonly involved in hospital - acquired legionnaire's disease.Cultureo Strict aerobeo Has fastidious requirements and grow on complex media such as buffered charcol, yeast extract (BCYE) agar.", 'role': 'assistant'}]