Organic Acid Blends Improve Intestinal Integrity, Modulate Short-chain Fatty Acids Profiles and Alter Microbiota of Broilers Under Necrotic Enteritis Challenge

Overview

Journal Anim Nutr

Date 2022 Jan 3

PMID 34977378

Citations 16

Authors

Alip Kumar

Mehdi Toghyani

Sarbast K Kheravii

Lane Pineda

Yanming Han

Robert A Swick

Shu-Biao Wu

Affiliations

Soon will be listed here.

Abstract

Controlling enteric diseases of broilers is crucial. Among many additives, organic acids (OA) and their blends are gaining attention to combat diseases in the post-antibiotic era. The current study evaluated the potentials of short-chain fatty acids (SCFA) and medium-chain fatty acids (MCFA) blends and/or phenolic compounds on intestinal integrity, intestinal pH, caecal microbiota, and caecal SCFA profiles of broilers under necrotic enteritis (NE) challenge. The additives used were: (A) a blend of SCFA, MCFA, and a phenolic compound (SMP), (B) a blend of free and buffered SCFA with MCFA (SMF), and (C) a blend of free and buffered SCFA with a high concentration of MCFA (SHM). A total of 1,404 male parental chicks of Ross 308 broilers were randomly allocated to 78 floor pens on hatching day with 6 treatments replicated 13 times with 18 birds per pen. The treatments were: UCC, unchallenged control; CHC, challenged control; BAC, challenged group plus zinc bacitracin; SMP, challenged group plus additive SMP; SMF, challenged group plus additive SMF; SHM, challenged group plus additive SHM. Birds were challenged with field-strain spp. on d 9 and on d 14. Birds challenged with NE increased fluorescein isothiocyanate dextran (FITC-d) concentration in serum, reduced acetate and butyrate concentrations, and increased and load in the caeca ( < 0.05). Birds fed additives decreased FITC-d from gut to serum, reduced (d 16, < 0.05) and numerically reduced load compared to CHC group. Birds fed additive SHM had higher concentrations of acetate and butyrate (d 21, < 0.05) than CHC group but were not different from SMP and SMF groups. All the additives exhibited similar intestinal protection against NE compared to the BAC group indicated by FITC-d concentration in serum, acetate, propionate and butyrate concentrations in the caeca, and caecal bacterial loads except for the . ( > 0.05). The SMP group had a higher load compared to BAC ( < 0.05). These findings suggest the promising effects of OA blends as alternatives to BAC to ameliorate the impact of NE challenge of broilers as indicated by improved intestinal health.

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