Drug Sensitivity and Serological Type of Pseudomonas aeruginosa of Animal Origin

Abstract

A total of 118 strains of Pseudomonas aeruginosa were examined for sensitivity to antibacterial drugs by a plate dilution method. Of them, 97 had been isolated from bovine mastitis and 21 from clinical specimens of cattle, dogs, pigs, and snakes. All the strains showed high sensitivity to colistin, polymyxin-B, and gentamicin (MIC: 1.56×12.5μg/ml). More than 80% of them were rclativcly sensitive to fradiomycin, oxolinic acid, dihydrostreptomycin, streptomycin, oxytetracycline, tetracycline, and flavophospholipol (MIC: 12.5-50.0μg/ml). No strains were sensitive to aminobenzylpenicillin, Kanamycin, Kasugamycin, erythromycin, oleandomycin, spiramycin, tylosin, chloramphenicol, macarbomycin, nitrofurans, sulfa drugs, or nalidixic acid. Serological typing was carried out by the agglutination test with 14 antisera. Of. 93 strains of bovine mastitis origin, 83 were classified into 8 monoserotyps: 25 into Type 1, 18 into Type 8, 14 into Type 6, and 10 into Type 4. Of 17 strains isolated from clinical specimens, 16 were classified into 8 serotype: 5 into Type 1, 4 into Type6, 2 into Type 8, and one each into T·2×T·5 and T·10.