Characteristics of the intestinal flora of specific pathogen free chickens with age

Niu, Shichao; Tie, Kunyuan; Zhang, Qiuyang; Deng, Hewen; Gao, Chencheng; Yu, Tianhe; Lei, Liancheng; Feng, Xin

doi:10.1016/j.micpath.2019.05.014

Cited by 58 publications

(47 citation statements)

References 63 publications

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“…At genus level, the most predominant genera were Ruminococcus spp., Lactobacillus spp. and Bacteroides spp., in line with data reported by other authors [14,45,47]. In this experiment, statistically signi cant differences between breeds were found only for Lactobacillus spp.…”

Section: Discussionsupporting

confidence: 93%

“…It is well demonstrated that a greater complexity of the gut microbiota is observed as animals grow. However, in accordance with other studies, our ndings showed that the bacterial richness became relatively stable at mid-period for both breeds under the same production conditions [19,[39][40][41][42][43][44][45]. This fact evidences the importance of ock management during the production cycle in terms of the microbiota status, as the transmission between environmental and intestinal bacteria is proven [2,7,9,19,42,[46][47][48].…”

Section: Discussionsupporting

confidence: 91%

“…Regarding gut microbiota composition, the predominant phyla obtained in this study were Firmicutes and Bacteroidetes, followed by Proteobacteria [7,9,42,45,47,54]. Thus, any alteration in the microbiota balance could lead to an alteration on the health or productivity of the breed.…”

Section: Discussionmentioning

confidence: 75%

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Fast and slow-growing breeds: characterisation of broiler caecal microbiota development throughout the growing period

Dasí¹,

Villagrá²,

Toro³

et al. 2020

Preprint

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Background: The caecal microbiota and its modulation play an important role in animal health, productivity and disease control in poultry production. In this sense, it could be considered as a biomarker of poultry health. Furthermore, due to the emergence of resistant bacteria and the increasing social pressure to establish animal-friendly management on farms, producers are motivated to select more extensive and antibiotic-free breeds. It is therefore necessary to gain better knowledge on the development of major bacteria in healthy broilers, both in commercial fast-growing and in new slow-growing breeds. Hence, the aim of this study was to characterise caecal microbiota in two genetic poultry breeds throughout the growing period using 16S rRNA sequencing analysis. Results: A total of 50 caecal pools (25 per breed) were sequenced by the 16S rRNA method. The complexity of caecal microbiota composition increased significantly as animals grew. Furthermore, there were statistical differences between breeds at the end of the growing period. The dominant phyla throughout the production cycle were Firmicutes, Bacteroidetes and Proteobacteria. The predominantly identified genera were Ruminococcus spp., Lactobacillus spp. and Bacteroides spp.Conclusion: The results showed that the main caecal bacteria for both breeds were similar. Thus, these phyla or genera should be considered as biomarkers of poultry health in the evaluation of different treatments applied to animals.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 91%

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Fast and slow-growing breeds: characterisation of broiler caecal microbiota development throughout the growing period

Dasí¹,

Villagrá²,

Toro³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…In early life it is generally observed that the caeca contain high abundances of Enterobacteriales [9,10] and over the first few weeks of life these decline and members of the Clostridiales come to predominate [9][10][11][12][13][14][15][16], with some studies also showing a large increase in Bacteroidetes [12,17,18]. However, the results from some studies do not entirely follow this pattern [19,20] and variability in microbiota composition between flocks can be high [21,22]. Several studies have also examined samples from the small intestine which are less rich and diverse than caecal samples and contain a high abundance of Lactobacilli [12,14,17,18,20,[23][24][25].…”

Section: Introductionmentioning

confidence: 98%

Development of the duodenal, ileal, jejunal and caecal microbiota in chickens

Glendinning

Watson

2019

anim microbiome

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Background: The chicken intestinal microbiota plays a large role in chicken health and productivity and a greater understanding of its development may lead to interventions to improve chicken nutrition, disease resistance and welfare. Results: In this study we examine the duodenal, jejunal, ileal and caecal microbiota of chickens from day of hatch to 5 weeks of age (day 1, 3, 7, 14 and week 5). DNA was extracted from intestinal content samples and the V4 region of the 16S rRNA gene was amplified and sequenced. We identified significant differences in microbial community composition, diversity and richness between samples taken from different locations within the chicken intestinal tract. We also characterised the development of the microbiota at each intestinal site over time. Conclusions: Our study builds upon existing literature to further characterise the development of the chicken intestinal microbiota.

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“…Butyricicoccus is a butyrate-producing clostridial cluster IV genus. The abundance of Butyricicoccus increased significantly with age 37 .…”

Section: Relationship Between Faecal Microbial and Myofiber Types Or mentioning

confidence: 97%

Rearing pattern alters porcine myofiber type, fat deposition, associated microbial communities and functional capacity

Men

et al. 2019

Preprint

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Background: The Chinese believe that the meat of pigs reared in the past with free range tastes better than that of the pigs reared indoor on a large scale today. Gastrointestinal microflora is closely associated with the main factor of meat flavour, including fibre characteristics and lipid metabolism. Our method in this study involved different raising patterns within the semi free-grazing farm (FF) or indoor feeding farm (DF), the measurement of fat deposition and myofiber type by paraffin section and reverse transcription polymerase chain reaction and the identification of microbiome and functional capacities associated with meat quality through metagenomic sequencing. Results: Results showed that the fat area in muscle and adipose tissue and the myofiber density significantly increased in the pigs of the FF group. The relative abundance of bacteria associated with lipid metabolism, such as g_Oscillibacter, in the feces of the FF group was higher than that in DF group, and the relative abundance of some bacteria with probiotic function, including g_Lactobacillus and g_Clostridium, was lower than that in DF group. The abundance of g__Clostridium was significantly positively correlated with the intramuscular fat area, whereas health-related bacteria, such as g__Butyricicoccus, g__Eubacterium, g__Phascolarctobacterium and g__Oribacterium, was significantly negatively correlated with abdominal fat area, myofiber density and adipose triglyceride lipase (ATGL) mRNA expression. KEGG analysis showed that pigs raised in semi free-grazing farm can activate the pathway of inosine monophosphate (IMP) biosynthesis, glycolysis/gluconeogenesis and alanine, aspartate and glutamate metabolism. Conclusions: Free range feeding improves meat quality by changing the fibre type, myofiber density and metabolic pathways related to flavour amino acids, IMP or glycolysis/gluconeogenesis in muscle. However, prolonged feeding cycle increases fat deposition and associated microbial communities. Keywords: Rearing pattern, Myofiber type, Fat deposition, Gut micobiota

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Characteristics of the intestinal flora of specific pathogen free chickens with age

Cited by 58 publications

References 63 publications

Fast and slow-growing breeds: characterisation of broiler caecal microbiota development throughout the growing period

Fast and slow-growing breeds: characterisation of broiler caecal microbiota development throughout the growing period

Development of the duodenal, ileal, jejunal and caecal microbiota in chickens

Rearing pattern alters porcine myofiber type, fat deposition, associated microbial communities and functional capacity

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