Biochemical characteristics and serotypes of Actinobacillus pleuropneumoniae isolated from pneumonic lungs of pigs |
Byeong-yeal Jung1, Gil-jae Cho2, Bong-hwan Kim2, Kwang-hyun Cho2 |
1Veterinary Research Institute 2College of Veterinary Medicine, Kyungpook National University |
돼지 폐렴병소에서 분리한 Actinobacillus pleuropneumoniae의 특성에 관한 연구 |
정병열1, 조길재2, 김봉환2, 조광현2 |
1수의과학연구소 2경북대학교 수의과대학 |
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Abstract |
The present study was conducted to investigate the biochemical and serologic characteristic of Actinobacillus pleuropneumoniae isolated from pneumonic lungs of pigs during the period from January 1992 to April 1993. A pleuropneumoniae was isolated from 17(27.0%) of 63 growing pigs with respiratory signs and 21(6.4%) of 330 pneumonic lungs of slaughtered pigs. The seasonal isolation frequency of A pleuropneumoniae was higher in winter and spring than that in summer or fall. The biochemical and cultural properties of A pleluropneumoniae isolated from the pneumonic lungs of pigs were identical to those of the reference strains used. The isolates were highly susceptible to ampicillin, cephalothin, ceftiofur, ciprofloxacin(MIC : ${leq}0.39{mu}g/ml$) and moderately susceptible to amikacin, chloramphenicol, erythromycin, kanamycin, methicillin, penicillin-G, streptomycin(MIC : 0.78~25IU or ${mu}g/ml$), respectively. Sulfadimethoxine, sulfamerazine, tylosine showed no response to the isolates(MIC : ${geq}100{mu}g/ml$). Among the 38 isolates, 21(55.3%) and 13(34.2%) were resistant to oxytetracycline aid lincomydn, respectively(MIC : ${geq}50IU$ or ${mu}g/ml$). The majority of 38 A pleuropneumoniae isolates were turned out as serotype 2(47.4%) or serotype 5(54.7%) and the remaining 3 isolates were evenly classified to serotype 7, 10 or 12. It was noted A pleuropneumonine serotype 5 isolates were more resistant to oxytetracycline than serotype 2 isolates. |
Key Words:
Actinobacillus pleuropneumoniae, serotype, antibiotics susceptibility |
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