Prevalence of Salmonella and Campylobacter in beef cattle from transport to slaughter
Prevalence of Salmonella and Campylobacter in beef cattle from transport to slaughter
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DOI：
10.4315/0362-028x-65.11.1687
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发表时间：
2002-11-01
影响因子：
2
通讯作者：
Acuff, GR
中科院分区：
文献类型：
--
作者：
Beach, JC;Murano, EA;Acuff, GR
本研究的目的是评估牛运输过程中典型生产实践对这些牛的粪便、毛皮、尸体和环境（卡车）中沙门氏菌和弯曲杆菌发生率的影响。圈养栏和敲击箱）。评估了各种因素，包括动物的类型（饲养场牛与成年牧场牛）、牛的品种、动物的身体状况、动物的年龄、饲料和水的取出时间、饲养场或农场的运输车辆的污染水平、运输时间、牛在工厂的饲养围栏中饲养的时间以及饲养围栏的污染水平。在不同日期对每种类型动物的四组进行采样。在运输前和运输后从牛以及这些牛的尸体中采集样本（直肠和兽皮拭子）。还从运输车辆以及屠宰设施的保存围栏和敲击箱中采集运输前和运输后样本。对于饲养场牛，运输前后两种微生物的粪便脱落保持相当恒定（沙门氏菌为3 - 5%，弯曲杆菌为64 - 68%）。然而，成年牛的沙门氏菌散毒率从1%增加到21%，但弯曲杆菌保持不变（6%至7%）。这两种动物的生皮沙门氏菌污染从18%至20%的水平增加到50%至56%的水平。对于弯曲杆菌，饲养场牛的污染水平从25%降至13%，但成年动物的污染水平保持不变（1至2%）。19%的饲养场牛尸体和54%的成年牛尸体检测沙门氏菌呈阳性，而只有2%的饲养场牛尸体和没有成年牛尸体检测弯曲杆菌呈阳性。因此，对于饲养场牛，本研究中考虑的因素不影响任何一种微生物的散毒，但确实影响了生皮的污染。对于成年动物，这些因素只增加了沙门氏菌的脱落和隐藏污染，而不是弯曲杆菌。
The objective of this study was to evaluate the effect of typical production practices during the transport of cattle on the resulting incidence of Salmonella and Campylobacter in the feces, on the hides, and on the carcasses of these cattle and in the environment (trucks, holding pens, and knock boxes). Various factors were evaluated, including the type of animal (feedlot cattle vs. adult pasture cattle), the breed of cattle, the body condition of the animal, the age of the animal, the time of feed and water withdrawal, the contamination level of the transport vehicle at the feedlot or farm, the transport time, the time cattle were held in the holding pen at the plant, and the contamination level of the holding pen. Four groups of each type of animal were sampled on different days. Samples were collected from cattle prior to transport and after transport (rectal and hide swabs) as well as from the carcasses of these cattle. Pre- and posttransit samples were also taken from the transport vehicle and from the holding pen and knock box at the slaughter facility. For feedlot cattle, fecal shedding stayed fairly constant for both organisms before and after transport (3 to 5% for Salmonella and 64 to 68% for Campylobacter). However, the shedding rate for adult cattle increased from I to 21% for Salmonella but stayed constant for Campylobacter (6 to 7%). Contamination of hides with Salmonella increased for both animal types from a level of 18 to 20% to a level 50 to 56%. For Campylobacter, the contamination level decreased from 25 to 13% for feedlot cattle but remained unchanged for adult animals (I to 2%). Nineteen percent of feedlot cattle carcasses and 54% of adult cattle carcasses tested positive for Salmonella, while only 2% of feedlot cattle carcasses and none of the adult cattle carcasses tested positive for Campylobacter. Thus, for feedlot cattle, the factors considered in this study did not affect the shedding of either organism but did affect the contamination of hides with both. For adult animals, the factors increased both shedding of and hide contamination with Salmonella only, not Campylobacter.