고온 스트레스 조건에서 Limosilactobacillus reuteri 첨가가 포유 모돈의 생산성, 염증 반응 및 장 건강에 미치는 영향

초록

This study was conducted to evaluate the effects of dietary supplementation with Limosilactobacillus reuteri (L. reuteri) on sow performance, litter growth, inflammatory and oxidative stress status, intestinal barrier function, endocrine responses, and fecal microbial composition under heat stress. Thirty multiparous sows (Landrace × Yorkshire) were assigned to one of three treatments: thermoneutral condition (TN), heat stress without supplementation (CN), or heat stress with 0.05% L. reuteri supplementation (LR5). Heat stress increased hair cortisol concentrations and reduced average daily feed intake (ADFI), litter weight at weaning, and piglet body weight. In addition, serum concentrations of TNF-α, IL-10, and IL-1β were elevated in heat-stressed sows compared to those under thermoneutral conditions. Overall, dietary supplementation with L. reuteri exhibited protective effects against heat stress–induced metabolic, inflammatory, and microbial alterations in lactating sows, suggesting its potential use as a functional probiotic to enhance heat stress resilience. These findings indicate that probiotic supplementation may alleviate physiological disturbances caused by heat stress by improving feed intake and modulating immune responses, and thus serve as an effective nutritional strategy to enhance lactation performance and litter growth under heat stress.

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