NDLI: Gut microbiota and transportation stress response affected by tryptophan supplementation in broiler chickens

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Gut microbiota and transportation stress response affected by tryptophan supplementation in broiler chickens

Content Provider	Taylor & Francis Online
Author	Bello, Alhassan U. Farjam, Abdoreza Soleimani Idrus, Zulkifli Meng, Goh Yong Awad, Elmutaz Atta
Abstract	Stimulation of serotonergic activity by tryptophan (TRP) supplementation is known to influence behavioural and physiological processes. One hundred and twenty male broiler chicks were assigned in groups of 5–24 battery cage and fed experimental diets with 0.22, 0.42 and 0.62% of digestible TRP during 21–42 d. On 42 d, birds were challenged with 2 h of transportation stress and samples were collected before or after the transportation. The results revealed that TRP increased feed intake, but had no significant effect on growth performance. Regardless of transportation, heat shock protein 70 (HSP70) and corticosterone (CORT) decreased and serotonin (5-HT) elevated by increasing TRP level in diet. Breast muscle pH and colour were not affected by elevation in dietary TRP, but drip loss decreased and shear force increased. Quantification of gut microflora showed that supplementation of TRP increased Enterococci, and Bifidobacteria populations, while E. coli, Clostridia, Campylobacter and Enterobacteria populations decreased. The effect of diet on Lactobacilli population was not significant. In conclusion, feeding broilers with higher levels of TRP improves their welfare condition both before and after transportation stress, as measured by lower serum CORT and HSP70 and higher 5-HT. Increasing dietary TRP level may shift the balance of pathogenic/non-pathogenic bacteria in gut to a favourable state.
Starting Page	107
Ending Page	113
Page Count	7
File Format	PDF HTM / HTML
ISSN	1828051X
DOI	10.1080/1828051X.2017.1340814
Journal	Italian Journal of Animal Science
Volume Number	17
Issue Number	1
Language	English
Publisher	Taylor & Francis
Publisher Date	2017-06-30
Access Restriction	Open
Subject Keyword	Tryptophan Meat quality Corticosterone Microflora Transportation
Content Type	Text
Resource Type	Article

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