Hoffman D E, Spire M F, Schwenke J R, Unruh J A
Food Animal Health and Management Center, College of Veterinary Medicine, Kansas State University, Manhattan 66506, USA.
J Am Vet Med Assoc. 1998 Mar 1;212(5):668-72.
To determine the effect of source of cattle and distance cattle were transported to a commercial slaughter facility on prevalence and severity of carcass bruises in mature beef cows.
Epidemiologic investigation.
Carcasses from 3,955 beef cows from 11 states assembled in 89 procurement lots.
Each carcass was scored for bruise severity and location. Source of cattle was categorized. Distance from source to slaughter facility was determined. An ANCOVA was used to determine effects of variables on carcass bruises.
Mature beef cows marketed through livestock auctions conducting first-point testing for brucellosis, especially when transported longer distances (> 325 km) to slaughter facilities, had a greater number and severity of carcass bruises than cows originating from ranches or livestock auctions not conducting first-point testing. There was an increase in number of rib bruises in cows originating from livestock auctions not conducting first-point testing. Prevalence and severity of bruises were not significantly affected by transportation distance between cows originating from auctions not conducting first-point testing and cows originating from ranches.
A strong association existed between handling for brucellosis testing prior to sale for slaughter and distance transported to slaughter facility with carcass bruises in mature beef cows. Bruises are major quality defects that decrease carcass value and slaughter-cow prices. Repeated handling and restraint as well as long-distance transport are issues to consider regarding the responsibility of the livestock industry to provide for the safety and well-being of cattle sold for slaughter.
确定肉牛来源以及肉牛运输至商业屠宰场的距离对成年肉牛胴体瘀伤的患病率和严重程度的影响。
流行病学调查。
来自11个州的3955头肉牛的胴体，分为89个采购批次。
对每具胴体的瘀伤严重程度和位置进行评分。对牛的来源进行分类。确定从来源地到屠宰场的距离。使用协方差分析来确定变量对胴体瘀伤的影响。
通过对布鲁氏菌病进行首次检测的牲畜拍卖会销售的成年肉牛，尤其是在运输较长距离（>325公里）至屠宰场时，其胴体瘀伤的数量和严重程度高于来自牧场或未进行首次检测的牲畜拍卖会的牛。来自未进行首次检测的牲畜拍卖会的牛肋骨瘀伤数量有所增加。对于来自未进行首次检测的拍卖会的牛和来自牧场的牛，运输距离对瘀伤的患病率和严重程度没有显著影响。
在屠宰前进行布鲁氏菌病检测的处理方式以及运输至屠宰场的距离与成年肉牛胴体瘀伤之间存在密切关联。瘀伤是主要的质量缺陷，会降低胴体价值和屠宰牛价格。反复处理和限制以及长途运输是畜牧业在为出售供屠宰的牛提供安全和福利方面需要考虑的问题。
