Departament de Producció Animal, Universitat de Lleida, Avenida Rovira Roure, 191, 25198 Lleida, Spain.
Vet Rec. 2010 Nov 20;167(21):815-9. doi: 10.1136/vr.c6226.
Factors affecting the number of weaned piglets found dead after commercial transport between farms were studied by means of multilevel Poisson regression. Information relating to 58,682 piglets during 109 journeys in different EU countries was collected at the end of each journey by means of questionnaires. Overall, 0.07 per cent of all the transported piglets were found dead on arrival, and deaths of piglets were recorded in 13.8 per cent of journeys. The final regression model, which was calculated using the complete records from 105 journeys, included the total duration of the journey, the mean outside temperature during the journey, whether the piglets were fasted before transport, whether drinking water was provided, the type of ventilation in the vehicle and the interaction between journey duration and the mean outside temperature. The duration of the journey and the mean outside temperature showed a significant interaction effect, with a gradual increase in the predicted number of dead piglets with increasing journey duration as the outside temperature increased. Providing the piglets with drinking water and having mechanically assisted ventilation (fans) in the vehicle during the journey significantly reduced the number of deaths, as did fasting the piglets before transport.
采用多水平泊松回归分析研究了影响农场间商业运输后死亡断奶仔猪数量的因素。通过问卷调查，在欧盟不同国家的 109 次运输过程结束时收集了与 58682 头仔猪相关的信息。总的来说，所有运输仔猪中有 0.07%在到达时被发现死亡，在 13.8%的运输中记录了仔猪死亡。最终的回归模型是使用 105 次完整记录计算得出的，其中包括运输总时长、运输过程中的平均外部温度、运输前仔猪是否禁食、是否提供饮用水、车辆的通风类型以及运输时长与平均外部温度之间的相互作用。运输时长和平均外部温度显示出显著的交互作用，随着外部温度的升高，预测死亡仔猪数量随着运输时长的增加而逐渐增加。在运输过程中为仔猪提供饮用水和在车辆中使用机械辅助通风（风扇）显著降低了死亡率，运输前禁食仔猪也有同样效果。
