Original research Effects of a nursery feed regimen with spray-dried  bovine plasma on performance and mortality of  weaned pigs positive for porcine reproductive and  respiratory syndrome virus.




Objective: To compare performance and  mortality of weaned pigs positive for porcine  reproductive and respiratory syndrome virus  (PRRSV) provided either a feed regimen  with spray-dried bovine plasma (SDBP) or a  feed regimen with a combination of alterna tive proteins and additives (ALT). 


Materials and methods: Pigs (n = 960)  weaned at 21 days of age were allotted by sex  and initial body weight (BW) into four nurs ery rooms, each with 10 pens and 24  pigs per  pen. Pigs were provided either the SDBP or  ALT regimen, each with three phases.


Results: Pigs fed the SDBP regimen had  higher (P < .05) average BW at days 14, 21,  28, 35, 42, and 48 post weaning. Cumulative  average daily weight gain and average daily  feed intake were higher (P < .05) for pigs fed  the SDBP regimen. There was a tendency 


Implications: Under these conditions,  PRRSV-positive pigs fed the SDBP regimen  have greater final BW and tend to have lower  mortality compared to pigs fed the ALT  regimen. 

Keywords: swine, specialty proteins, spray dried bovine plasma, porcine reproductive  and respiratory syndrome virus, mortality