Effect of heat stress on the endogenous intestinal loss of amino acids in growing pigs

Journal of Animal Science
A MoralesM Cervantes

Abstract

Heat stress (HS) increases the death of intestinal cells in pigs, which, in turn, may elevate the endogenous intestinal loss (EIL) of proteins and AA. An experiment was conducted to analyze the effect of HS on the AA composition of intestinal endogenous proteins and the EIL of AA in pigs. Eight pigs (25.2 ± 1.2 kg initial BW) were surgically implanted with T-type cannulas at the end of the small intestine. After surgery recovery, during the subsequent 7 d, all pigs were adapted to a protein- and AA-free diet and trained to consume the same amount of feed twice a day. All pigs were housed under thermoneutral (TN) conditions (22 ± 2°C) during this time. The following day, all pigs were still under TN conditions and ileal content was collected during 12 consecutive hours, at the end of which and for the following 8 d the pigs were exposed to natural HS conditions (31 to 37°C). Ileal content was collected again on d 2 (HS at d 2 [HSd2]) and 8 (HS at d 8 [HSd8]). Body temperature (BT) was measured in another group of 8 pigs every 15 min during the whole study. The average BT at HSd2 (39.6°C) was higher ( < 0.05) compared with both TN conditions (38.6°C) and HSd8 (38.8°C), but it did not differ between TN conditions and HSd8. The AA ...Continue Reading

References

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Citations

Jan 14, 2020·Journal of the Royal Statistical Society. Series C, Applied Statistics·Ana-Maria StaicuEric van Heugten
Dec 28, 2018·PeerJ·Manuel LachicaIgnacio Fernández-Fígares
Jan 25, 2018·Translational Animal Science·Nicholas K GablerNicole Reisinger
Oct 11, 2017·Journal of Animal Physiology and Animal Nutrition·A MoralesM Cervantes

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