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: Microbiology
[{'content': 'All of the following are true about Listeria except ? \nSelect and explain. \nA. Transmitted by contaminated milk, B. Gram negative bacteria, C. Cause aboion in pregnancy, D. Causes meningitis in neonates', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Gram negative bacteria Listeria mococytogenes Morphology . Gram positive . Coccobacillus with tendency to occur in chains. . Exhibits characteristic, slow, tumbling motility when grown at 25degC but at 37degC is non motile. This is because peritrichous flagella are produced by the bacillus optimally at 20-30degC but only scantily or not at all at 37degC.", 'role': 'assistant'}]