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