Härdi-Landerer M C, Grieder S, Mengelt R, Hillmann E
Institut für Agrarwissenschaften, D-USYS, ETH Zürich.
Schweiz Arch Tierheilkd. 2017 May;159(5):293-300. doi: 10.17236/sat00116.
Two flocks of ewes with lambs were compared for differences in performance. One group was permanently infected with footrot, the other one served as healthy control. They were kept in the same barn but in different bays during lambing and on pasture during the summer. Biweekly all animals were weighed and in the affected group all feet were scored for severity of footrot and if necessary the claws were treated. Furthermore the body condition was scored 4 times in the ewes. The lambs were slaughtered with 43 kg. At that time age and carcass quality were used as parameters. In 20 lambs of each group the lying behaviour was measured using a datalogger during 5 consecutive days. The results revealed significant differences in the performance of ewes and lambs between the two groups. The overall duration of fattening was 31.8 days longer in affected animals. Most importantly, even mild footrot led to significantly impaired growth of the lambs and an altered lying behaviour compared to the healthy controls. The lying periods were more frequent but of shorter duration in affected lambs.
对两组带羔羊的母羊的生产性能差异进行了比较。一组母羊持续感染腐蹄病，另一组作为健康对照。在产羔期间，它们被养在同一 barn 中，但处于不同区域，夏季则在牧场放牧。每两周对所有动物进行称重，对受感染组的所有蹄子按腐蹄病严重程度进行评分，必要时对蹄爪进行处理。此外，对母羊的体况进行了 4 次评分。羔羊在体重达到 43 千克时屠宰。此时，将年龄和胴体质量作为参数。在每组的 20 只羔羊中，使用数据记录器连续 5 天测量躺卧行为。结果显示，两组之间母羊和羔羊的生产性能存在显著差异。受感染动物的育肥总时长要长 31.8 天。最重要的是，与健康对照相比，即使是轻度腐蹄病也会导致羔羊生长显著受损以及躺卧行为改变。受感染羔羊的躺卧时段更频繁，但持续时间更短。
