Prevalence of bacterial respiratory diseases in cattle

Jeong, Byeong-yeal; Jeon, Yong-soo

Korean Journal of Veterinary Research 2004;44(3):427-432.

Byeong-yeal Jeong, Yong-soo Jeon

National Veterinary Research and Quarantine Service

소 세균성 호흡기 질병 분포도 조사

정병열, 전용수

국립수의과학검역원

Abstract

The objective of this study was to determine the prevalence of pneumonic bacteria in lungs and nasal swabs of cattle with respiratory diseases. From 95 pneumonic lungs of slaughtered cattle, 41 (43.2%) positive lungs were yielded with 54 pneumonic bacteria, which corresponded to P. multocida (n = 34), A. pyogenes (n = 14) and P. haemolytica (n = 6). One-hundred sixty seven pneumonic bacteria were isolated from 195 nasal swabs in calves, 64.7% (108 isolates) belonged to P. multocida, 16.2% to A. pyogenes, 13.8% to P. haemolytica and 5.4% to H. somnus. Fifty percents (n = 6) of isolates from pneumonic lungs of calves were identified as P. multocida. All isolates of P. multocida belonged to type A according to hyaluronidase test. Antimicrobial susceptibility tests showed that most isolates of P. multocida and P. haemolytica were sensitive to amoxicillin/clavulanic acid, cephalothin, ciprofloxacin, enrofloxacin, fluorophenicol and norfloxacin. The emergence of antimicrobial resistant Pasteurella spp. observed in this study, however, might limit such application. According to histopathological examination, pneumonia by mycoplasma or/and bacteria accounted for 92.8% among 69 pneumonic lungs of slaughtered cattle.

Key Words: prevalence, respiratory diseases, cattle, antimicrobial susceptibility