Physiological Stress Mediated by Corticosterone Administration Alters Intestinal Bacterial Communities and Increases the Relative Abundance of Clostridium perfringens in the Small Intestine of Chickens

被引:14
作者
Zaytsoff, Sarah J. M. [1 ,2 ]
Uwiera, Richard R. E. [2 ]
Inglis, G. Douglas [1 ]
机构
[1] Agr & Agri Food Canada, Lethbridge, AB T1J 4B1, Canada
[2] Univ Alberta, Edmonton, AB T6G 2P5, Canada
关键词
physiological stress; microbiota; corticosterone; small intestine; cecum; Clostridium perfringens; NECROTIC ENTERITIS; BROILER-CHICKENS; SELECTIVE GROWTH; MICROBIOTA; COLONIZATION; MICROFLORA; RESISTANCE; DIVERSITY; POULTRY; TOXIN;
D O I
10.3390/microorganisms8101518
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
A model of physiological stress mediated by the administration of corticosterone (CORT) was used to investigate the impact of stress on the intestinal microbiota of chickens. Birds were administered CORT in their drinking water at 0, 10 (low dose CORT; LDC), and 30 (high dose CORT; HDC) mg/L. Digesta from the small intestine and ceca were examined after 1, 5, and 12 days post-initiation of CORT administration by 16S rRNA gene sequencing. A decrease in phylogenetic diversity and altered composition of bacteria were observed for HDC in the small intestine. Analysis by ANOVA-Like Differential Expression 2 (ALDEx2) showed that densities of Clostridium sensu stricto 1 bacteria were increased in the small intestine for LDC and HDC. Quantitative PCR confirmed that CORT administration increased densities of Clostridium perfringens in the small intestine, but only HDC was associated with increased densities of the bacterium in ceca. Predictive functional analysis by Phylogenetic Investigation of Communities by Reconstruction of Unobserved States 2 (PICRUSt2) showed pathways of carbohydrate metabolism to be enriched with CORT, and amino acid synthesis to be enriched in control birds in the small intestine. In conclusion, physiological stress mediated by CORT modulated bacterial communities in the small intestine and increased densities of C. perfringens. This implicates stress as an important mediator of this important enteric pathogen in poultry.
引用
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页码:1 / 16
页数:16
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