Korean Journal of Veterinary Pathology (한국수의병리학회지)
- Volume 2 Issue 1
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- Pages.53-60
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- 1998
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- 1226-766X(pISSN)
A case report of blackleg in a Holstein bull
비육유에서 발생한 기종저의 병리학적 관찰
- Hwang, Eui-Kyung (National Veterinary Research Institute, MAF) ;
- Kim, Jae-Hoon (National Veterinary Research Institute, MAF) ;
- Yoon, Soon-Seek (National Veterinary Research Institute, MAF) ;
- Sohn, Hyun-Joo (National Veterinary Research Institute, MAF) ;
- Cho, Yun-Sang (National Veterinary Research Institute, MAF) ;
- Yoo, Han-Sang (College of Veterinary medicine, Seoul National University) ;
- Park, Kyung-Ae (Southern Branch, Kyunggi Provincial Vet. Service Lab.) ;
- Jean, Young-Hwa (National Veterinary Research Institute, MAF) ;
- Choi, Sang-Ho (National Veterinary Research Institute, MAF)
- 황의경 (수의과학연구소) ;
- 김재훈 (수의과학연구소) ;
- 윤순식 (수의과학연구소) ;
- 손현주 (수의과학연구소) ;
- 조윤상 (수의과학연구소) ;
- 유한상 (서울대학교 수의과대학) ;
- 박경애 (경기도 가축위생시험소 남부지소) ;
- 진영화 (수의과학연구소) ;
- 최상호 (수의과학연구소)
- Published : 1998.06.01
Abstract
A fourteen-month-old Holstein bull from a private cattle fattening farm at Ansung county in Kyunggi Province Korea was submitted on August 2nd 1997, for examination at the Pathology Division of the National Veterinary Research Institute. The bull died within 24 hours after developing clinical signs of abrupt inertia, complete anorexia high fever(40.3℃) diffuse severe emphysematous swelling of upper part of the right hind leg lateral recumbancy and paralysis. At necropsy diffuse severe subcutaneous redness and influx of serosanguinous exudate containing gas bubbles had accumulated under the thorax right hip and upper region of right hind leg. Muscles in upper right hind leg were blackish to dark red and yellowish brown in color. Muscle bundles were dry and separated by gas bubbles and serosanguinous fluids and muscles sections from affected regions floated in water. Histopathologically muscle fibers were partially or entirely degenerated fragmented and separated by exudate and gaseous substance mixed with polymorphonuclear cells. Blood vascular walls in affected regions showed severe acute fibrinoid necrosis. Typical large rod-shaped bacteria with or without oval central to subterminal spores were frequently observed in tissue sections stained with H-E and Gram stain. The large Gram-positive anaerobic endospore-producing rods were isolated from the suspension of muscle lesions. Isolated bacteria were identified as Clostridium(CL) chauvoei and CL. sordellii by biochemical tests. This case was diagnosed as blackleg based on the typical clinical signs gross finding histopathological observation and bacteriological results. This is the first case report on blackleg associated with Cl. chauvoei and Cl. sordellii in Holstein cattle in Korea.