<prompt> In a patient with urethral syndrome, urine microscopy shows full of polymorph, but no bacteria. The most appropriate culture medium is__PPLO brothMcCoy cellsRobesons cooked meatThayer main agar  <response>: The clinical picture is suggestive of Chlamydial infection hence the most appropriate culture medium is McCoy cellshuman synol carcinoma cell line. Abnormal urethral Grams stains showing 10 PMNs1000A field in women with dysuria but without coliform bacteriuria suppo the diagnosis of chlamydial urethritis. Thayer-Main agar: Neisseria Robesons 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 