Comparison of production losses caused by chronic Fasciola gigantica infection in yearling Friesian and Boran cattle
Comparison of production losses caused by chronic Fasciola gigantica infection in yearling Friesian and Boran cattle
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一岁弗里斯兰牛和博兰牛慢性巨大片形吸虫感染造成的生产损失比较
DOI：
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发表时间：
1998
影响因子：
1.7
通讯作者：
J. A. Onyango
中科院分区：
文献类型：
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作者：
L. Wamae;J. Hammond;L. Harrison;J. A. Onyango
一岁的弗里西亚牛和博兰牛被注射了标准剂量的巨型片吸虫囊虫，旨在产生慢性感染。然后在感染后对它们的体重进行了23周的监测。按照标准的肉类检验程序，所有来自受感染牛的肝脏都被宣布不合格。在每只动物22公斤的情况下，受感染的波兰人的平均减重幅度明显大于受感染的弗里斯人。与对照牛相比，根据肯尼亚目前的销售价格，肝脏报废和增重减少共同造成的生产损失对Friesians和Borans来说分别为12.11美元(4.92%)和23.41美元(10.34%)。这些数据表明，一岁的博兰牛的生产力损失和肝片吸虫病的经济后果比弗里斯牛严重得多。这些发现对评估对这种寄生虫的控制措施可能带来的好处有一定的意义。
Yearling Friesian and Boran cattle were given a standard dose of Fasciola gigantica metacercariae designed to produce chronic infection. Their liveweights were then monitored for 23 weeks post-infection. Following standard meat inspection procedures, all the livers from the infected cattle were condemned. At 22 kg per animal, the mean reduction in liveweight gain in infected Borans was significantly greater than in infected Friesians. Compared to the control cattle and based on current sale prices in Kenya, the production losses from the combination of liver condemnations and reduction in liveweight gain constituted a loss in value of US$12.11 (4.92%) and US$23.41 (10.34%) for Friesians and Borans respectively. These data indicate that productivity losses and the economic consequencies of fasciolosis in yearling Boran cattle are much more severe than in Friesians. These findings have implications for assessing the likely benefits of control measures against this parasite.