PMID- 32166330 OWN - NLM STAT- MEDLINE DCOM- 20200626 LR - 20231111 IS - 1525-3163 (Electronic) IS - 0021-8812 (Print) IS - 0021-8812 (Linking) VI - 98 IP - 4 DP - 2020 Apr 1 TI - Effect of porcine reproductive and respiratory syndrome virus infection and soy isoflavone supplementation on carcass cutability and meat quality of pigs. LID - 10.1093/jas/skaa080 [doi] LID - skaa080 AB - The objective was to evaluate the effects of porcine reproductive and respiratory syndrome virus (PRRSV) infection and dietary soy isoflavone (ISF) supplementation on carcass cutability and meat quality of commercial pigs. Barrows (21 d of age) were randomly allotted to experimental treatments that were maintained throughout the study: noninfected pigs received an ISF-devoid control diet (CON, n = 22) and infected pigs received either the control diet (PRRSV-CON, n = 20) or that supplemented with total ISF in excess of 1,500 mg/kg (PRRSV-ISF, n = 25). Pigs were penned by treatment, with six pigs within a pen. Following a 7-d adaptation, weanling pigs were inoculated once intranasally with either a sham-control (phosphate buffered saline [PBS]) or live PRRSV (1 x 105 tissue culture infective dose [TCID]50/mL, strain NADC20). Pigs were maintained on experimental diets for 166 d after inoculation and then slaughtered (192 or 194 d of age; approximately 120 kg body weight [BW]). At 1-d postmortem, left sides were separated between the 10th and 11th rib for the determination of loin eye area (LEA), backfat (BF) thickness, and loin quality (ultimate pH, instrumental color, drip loss, visual color, marbling, and firmness). Loin chops were aged 14 d postmortem prior to Warner-Bratzler shear force (WBSF) determination. Belly width, length, thickness, and flop distance were determined. Data were analyzed as a one-way ANOVA with pig as the experimental unit. Carcass yield, LEA, BF, and estimated lean percentage did not differ (P > 0.26) among treatments. Loins from CON pigs had increased ultimate pH (P = 0.01), reduced L* scores (P = 0.005) coupled with darker visual color scores (P = 0.004), were firmer (P < 0.0001), and exhibited reduced drip loss (P = 0.01) compared with PRRSV-CON and PRRSV-ISF pigs. However, WBSF did not differ (P = 0.51) among treatments after 14 d of aging. Bellies from CON pigs were more firm compared with bellies from PRRSV-CON and ISF pigs (P < 0.01). These data suggest PRRSV infection did not alter carcass characteristics but may have marginally reduced loin and belly quality. Supplementation with dietary soy isoflavones did nothing to mitigate the detrimental effects of PRRSV infection. CI - (c) The Author(s) 2020. Published by Oxford University Press on behalf of the American Society of Animal Science. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. FAU - Bryan, Erin E AU - Bryan EE AD - Department of Animal Sciences, University of Illinois, Champaign-Urbana, IL. FAU - Smith, Brooke N AU - Smith BN AD - Department of Animal Sciences, University of Illinois, Champaign-Urbana, IL. FAU - Honegger, Lauren T AU - Honegger LT AD - Department of Animal Sciences, University of Illinois, Champaign-Urbana, IL. FAU - Boler, Dustin D AU - Boler DD AD - Department of Animal Sciences, University of Illinois, Champaign-Urbana, IL. FAU - Dilger, Ryan N AU - Dilger RN AD - Department of Animal Sciences, University of Illinois, Champaign-Urbana, IL. FAU - Dilger, Anna C AU - Dilger AC AD - Department of Animal Sciences, University of Illinois, Champaign-Urbana, IL. LA - eng PT - Journal Article PT - Randomized Controlled Trial, Veterinary PL - United States TA - J Anim Sci JT - Journal of animal science JID - 8003002 RN - 0 (Isoflavones) SB - IM MH - Animal Feed/analysis MH - Animals MH - Body Composition/*drug effects MH - Body Weight MH - Diet/*veterinary MH - *Dietary Supplements MH - Isoflavones/*pharmacology MH - Male MH - Porcine Reproductive and Respiratory Syndrome/*pathology MH - Porcine respiratory and reproductive syndrome virus MH - Pork Meat/*standards MH - Swine PMC - PMC7344111 OTO - NOTNLM OT - cutability OT - meat quality OT - pork porcine reproductive OT - respiratory syndrome virus EDAT- 2020/03/14 06:00 MHDA- 2020/06/27 06:00 PMCR- 2021/03/13 CRDT- 2020/03/14 06:00 PHST- 2020/02/06 00:00 [received] PHST- 2020/03/11 00:00 [accepted] PHST- 2020/03/14 06:00 [pubmed] PHST- 2020/06/27 06:00 [medline] PHST- 2020/03/14 06:00 [entrez] PHST- 2021/03/13 00:00 [pmc-release] AID - 5804630 [pii] AID - skaa080 [pii] AID - 10.1093/jas/skaa080 [doi] PST - ppublish SO - J Anim Sci. 2020 Apr 1;98(4):skaa080. doi: 10.1093/jas/skaa080.