Capsular serogrouping and antimicrobial drug susceptibility of pasteurella multocida isolated from Youngnam swine herds
1989
Cho, G.J. | Kim, B.H. | Tak, R.B. (Kyongbuk National Univ., Taegu (Korea R.). Coll. of Veterinary Medicine)
The capsular serogroupes and drug susceptibility of 111 isolates of Pasteurella multocida from pigs with atrophic rhinitis and pneumonic lesions were investigated. Of the 111 P multocida isolates, 42 were from lung lesions, 47 from nasal turbinate lesions and the remaining 22 from the nasal swabs. P multocida isolates were typed for capsular serogroupes A by hyaluronidase inhibition of capsule and D by acriflavine auto-agglutination. Most isolates (64.9 %) were type A, 23.4 % were type D and the remaining 11.7 % were untypable. Resistance to triple sulfa (97.3 %) was most frequent, followed by resistance to tiamulin (71.2 %), tylosin (56.8 %), streptomycin (36.9 %), and neomycin (36.0 %). The majority of the organisms were susceptible in order of prevalence to baytril (100 %), ampicillin (98.2 %), linsmycin (97.3 %), cephalothin (94.6 %), gentamycin (93.7 %), amikacin (92.3 %), tetracycline (91.9 %), trimethoprim/sulfamethoxazole (91.0 %), and kanamycin (90.1 %). No differneces in drug resistance in relation to capsular serogroupes of P multocida and the origin of lesions were noted. A high prevalence of multiple drug resistance was observed and the most common resistant patterns were Sss, Tm, Ty (12.6 %) and Sm, Sss, Tm, Ty (8.1 %) patterns
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