title: Determination of Bacteroides melaninogenicus serogroups by fluorescent antibody staining.
abstract: Fluorescein isothiocyanate-labeled antibody reagents (conjugates) were prepared to one strain of each of the three subspecies of Bacteroides melaninogenicus: B. melaninogenicus subsp. melaninogenicus, B. melaninogenicus subsp. asaccharolyticus, and B. melaninogenicus subsp. intermedius. These three conjugates were specific; thus, they provided a new serological classification of B. melaninogenicus. The three serogroups were designated A, B, and C. Most test strains (98%) isolated from human clinical specimens were assigned to a specific serogroup by immunofluorescence, and the serogroup of these test strains corroborated the biochemical characterization of the three subspecies of B. melaninogenicus. The conjugates failed to cross-react with other anaerobes or aerobes tested. This fluorescent antibody technique provided a more rapid classification of the three subspecies of B. melaninogenicus than did conventional biochemical methods.
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D001431:Bacteriological Techniques; D001439:Bacteroides / Q000145:classification* / Q000302:isolation & purification; D001442:Bacteroides Infections / Q000382:microbiology; D005069:Evaluation Studies as Topic; D005260:Female; D005455:Fluorescent Antibody Technique; D006801:Humans; D007106:Immune Sera; D008297:Male; D011817:Rabbits / Q000276:immunology; D012703:Serotyping / Q000379:methods*
chemical_list: D007106:Immune Sera