title: Differentiation of Pasteurella haemolytica biotypes A and T with growth inhibitors.
abstract: Differentiation of type A and type T cultures of Pasteurella haemolytica was accomplished by paper disks containing 0.3 microgram of penicillin G, which produced zones of inhibition larger than 10 mm with type A but not with type T strains. Basic fuchsin (0.2 microgram/ml), brilliant green (0.005 microgram/ml), methylene blue (3.1 micrograms/ml) in brain heart infusion broth permitted the growth of type T but that of type A isolates.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology; D004396:Coloring Agents / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D010325:Pasteurella / Q000145:classification* / Q000187:drug effects / Q000254:growth & development; D010326:Pasteurella Infections / Q000382:microbiology / Q000662:veterinary; D010400:Penicillin G / Q000494:pharmacology; D010403:Penicillin Resistance; D012756:Sheep; D012757:Sheep Diseases / Q000382:microbiology
chemical_list: D000900:Anti-Bacterial Agents; D004396:Coloring Agents; D010400:Penicillin G
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