Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/29320
Title: Reducing protein and supplementing crystalline amino acids, to alter dietary amino acid profiles in birds challenged for subclinical necrotic enteritis
Contributor(s): Hilliar, M  (author)orcid ; Keerqin, C  (author)orcid ; Girish, C K (author); Barekatain, R  (author); Wu, S-B  (author)orcid ; Swick, R A  (author)orcid 
Publication Date: 2020-04
Early Online Version: 2020-02-22
Open Access: Yes
DOI: 10.1016/j.psj.2019.11.042
Handle Link: https://hdl.handle.net/1959.11/29320
Abstract: 

Necrotic enteritis (NE) is an infection of the gastrointestinal tract and is estimated to cost the global poultry industry billions of dollars annually. A study was conducted to examine whether reducing the crude protein might offset the severity of NE in broilers experimentally challenged with Eimeria spp. on day 9 and Clostridium perfringens on days 14 and 15. Furthermore, increasing the dietary amino acid (AA) density of the diet was also examined owing to identified benefits of improving performance compromised from low protein (LP) diets or NE. A 2 × 2 × 3 factorial arrangement of treatments at 6 replicates per treatment was used with 972 Ross 308 cockerels fed wheat-sorghum-soy-based diets to 35 D. Factors were NE challenge: no or yes; protein: standard (SP) or LP; and AA density: 100% AA, 115% with only essential AA (115% EAA) increased, and 115% AA with both essential and nonessential AA (115% AA) increased. The performance was measured in grower (days 7-21), finisher (days 21-35), and overall (day 7-35) periods. In addition, on day 16, intestinal lesion score and cecal short-chain fatty acids were measured. Only in nonchallenged birds fed LP diets, 115% AA increased grower feed intake (P < 0.01) and body weight gain (P < 0.05) compared to 115% EAA treatments. Challenge increased jejunal lesions (P < 0.001) with no difference between dietary treatments. Finisher body weight gain was greater in nonchallenged birds fed the 115% AA diets than in challenged birds (P < 0.05). Feeding diets with higher nonessential AA encouraged faster recovery from NE challenge. When fed the SP diets, NE challenge increased cecal butyric acid (P < 0.01) and total short-chain fatty acids (P < 0.05). The nutrient matrix used in LP diets does not favor beneficial butyric acid-producing bacteria. Using LP diets to mitigate NE severity does not offset the predisposing effect of E. spp. when attacking the gastrointestinal tract, and NE recovery is favored when feeding SP diets or additional AA.

Publication Type: Journal Article
Source of Publication: Poultry Science, 99(4), p. 2048-2060
Publisher: Elsevier BV
Place of Publication: Netherlands
ISSN: 1525-3171
0032-5791
Fields of Research (FoR) 2008: 070204 Animal Nutrition
070205 Animal Protection (Pests and Pathogens)
Fields of Research (FoR) 2020: 300303 Animal nutrition
300304 Animal protection (incl. pests and pathogens)
Socio-Economic Objective (SEO) 2008: 830309 Poultry
Socio-Economic Objective (SEO) 2020: 100411 Poultry
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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