The effect of cross fostering on PRRS transmission and litter performance

摘要

Cross fostering is used in swine production to improve piglet growth performance and reduce piglet mortality during lactation.1 Cross fostering though has been shown to cause a possible increase of Porcine Respiratory and Reproductive Syndrome (PRRS)in initially non-infected piglets in a herd.2 Research shows, increases in pre-weaning mortality can be controlled by implementing minimal pig movement during an acute PRRS break.3 The objective of this study was to analyze the role of cross fostering intransmission of PRRS at 10 weeks after a live virus inoculation (LVI). In addition, the effects of pig movement on average daily gain (ADG) at weaning and pre-wean mortality (PWM) in a commercial facility was investigated.