This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': "In a patient with urethral syndrome, urine microscopy shows full of polymorph, but no bacteria. The most appropriate culture medium is__ \nSelect and explain. \nA. PPLO broth, B. McCoy cells, C. Robeson's cooked meat, D. Thayer main agar", 'role': 'user'}, {'content': "Answer: B \nExplanation: The clinical picture is suggestive of Chlamydial infection hence the most appropriate culture medium is McCoy cells(human synol carcinoma cell line). Abnormal urethral Gram's stains showing >10 PMNs/1000A~ field in women with dysuria but without coliform bacteriuria suppo the diagnosis of chlamydial urethritis. Thayer-Main agar: Neisseria Robeson's cooked meat: Anaerobes, especially Clostridia Pleuropneumonia-like organisms (PPLO) broth: Mycoplasma spp. and Ureaplasma spp. Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition", 'role': 'assistant'}]