Growth performance and gut health of Escherichia coli-challenged weaned pigs fed canola meal-containing diet.

Autor:	Hong J; Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA., Ariyibi S; Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA., Antony L; Department of Veterinary and Biomedical Sciences, South Dakota State University, Brookings, SD 57007, USA., Scaria J; Department of Veterinary and Biomedical Sciences, South Dakota State University, Brookings, SD 57007, USA., Dilberger-Lawson S; Department of Veterinary and Biomedical Sciences, South Dakota State University, Brookings, SD 57007, USA., Francis D; Department of Veterinary and Biomedical Sciences, South Dakota State University, Brookings, SD 57007, USA., Woyengo TA; Department of Animal Science, South Dakota State University, Brookings, SD 57007, USA.; Department of Animal Science, Aarhus University, DK-8830 Tjele, Denmark.
Jazyk:	angličtina
Zdroj:	Journal of animal science [J Anim Sci] 2021 Aug 01; Vol. 99 (8).
DOI:	10.1093/jas/skab196
Abstrakt:	An experiment was conducted to evaluate the effects of including canola meal (CM) in diets for weaning pigs challenged with a F18 strain of Escherichia coli on growth performance and gut health. A total of 36 individually housed weaned pigs (initial body weight [BW] = 6.22 kg) were randomly allotted to one of the three diets (12 pigs/diet). The three diets were corn-soybean meal (SBM)-based basal diet (control diet) and the basal diet with 0.3% zinc oxide, 0.2% chlortetracycline, and 0.2% tiamulin (antibiotic diet) or with 20% CM diet. The diets were fed in two phases: Phase 1: days 0 to 7 and Phase 2: days 7 to 20. All pigs were given an oral dose of 2 × 109 CFU of F18 strain of E. coli on day 7. Fecal score was assessed daily throughout the trial. Dietary antibiotics increased (P < 0.05) overall average daily gain (ADG) and average daily feed intake (ADFI) compared by 48% and 47%, respectively. Dietary CM increased (P < 0.05) overall ADG and ADFI by 22% and 23%, respectively; but the ADG and ADFI values for CM-containing diet did not reach those for the antibiotics-containing diet. Dietary antibiotics reduced (P < 0.05) fecal score; however, dietary CM unaffected fecal score. Dietary antibiotics decreased (P < 0.05) liver weight per unit live BW by 16% at day 20, whereas dietary CM did not affect liver weight per unit live BW (29.2 vs. 28.6). Also, dietary antibiotics increased (P < 0.05) serum triiodothyronine and tetraiodothyronine levels for day 14, whereas dietary CM did not affect the serum level of these hormones. Dietary antibiotics reduced (P < 0.05) the number white blood cells and neutrophils by 38% and 43% at day 20, respectively, whereas dietary CM tended to reduce (P = 0.09) the number white blood cells by 19% at day 20. The number white blood cells for CM diet tended to be greater (P < 0.10) than that for antibiotics diet. The dietary antibiotics decreased (P < 0.05) the concentration of individual volatile fatty acids and hence of total volatile fatty acid in cecum by 61% at day 20, whereas dietary CM decreased (P < 0.05) cecal butyric acid concentration by 61% and tended to reduce (P < 0.10) total volatile fatty acid concentration by 30% at day 20. In conclusion, the dietary inclusion of 20% CM improved ADG and tended to reduce white blood cell counts. Thus, inclusion of CM in antibiotics-free corn-SBM-based diets for weaned pigs that are challenged with F18 strain of E. coli can result in their improved performance partly through a reduction of the inflammatory response. (© The Author(s) 2021. Published by Oxford University Press on behalf of the American Society of Animal Science.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu