Summary and Implications
Average daily gain (ADG) and viral load (VL) were evaluated for pigs co-infected with porcine reproductive and respiratory syndrome (PRRS) virus (PRRSV) and porcine circovirus type 2b (PCV2b). Pigs were pre-selected for WUR genotype (a marker on chromosome 4 associated with weight gain and VL under PRRSV-challenge), half were vaccinated for PRRS, and half were not. Results indicate that vaccination for PRRS resulted in slower growth prior to co-infection and that the AB WUR genotype was associated with faster growth prior to co-infection, lower PRRS VL, and lower PCV2b VL in vaccinated pigs.
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Dunkelberger, Jenelle R.; Serão, Nick V. L.; Kerrigan, Maureen; Lunney, Joan; Rowland, Bob; and Dekkers, Jack C. M.
"Effect of WUR Genotype and PRRS Vaccination on Pigs Co-Infected with PRRS and PCV2b,"
Animal Industry Report:
AS 661, ASL R3031.
Available at: http://lib.dr.iastate.edu/ans_air/vol661/iss1/94