Indirect immunofluorescence staining of Chlamydia trachomatis inclusions in microculture plates with monoclonal antibodies.
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Indirect immunofluorescence (IF) staining, using a monoclonal antibody, detected two- to fourfold more inclusions than did iodine staining. Of 274 clinical specimens, 53 (19.3%) were positive by IF on passage 1 as compared with 33 (12%) by iodine staining (P less than 0.005). IF-stained inclusions in McCoy cells in the bottom of microculture wells were readily viewed with a long-focal-length objective at a magnification of 250 X.
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