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Ticks_bacteria_communities_Malaysia

ABSTRACT: Bacterial communities in Haemaphysalis, Dermacentor and Amblyomma ticks collected from wild boars of an Orang Asli Community in Malaysia

PROVIDER: PRJEB31681 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3219320.fastq.gz	Fastqsanger.gz
	ERR3219330.fastq.gz	Fastqsanger.gz
	ERR3219340.fastq.gz	Fastqsanger.gz
	ERR3219350.fastq.gz	Fastqsanger.gz
	ERR3219360.fastq.gz	Fastqsanger.gz

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Linking the effects of helminth infection, diet and the gut microbiota with human whole-blood signatures

Project description:Purpose: Helminth infection and dietary intake can affect the intestinal microbiota, as well as the immune system. Methods: Here we analyzed the relationship between fecal microbiota and blood profiles of indigenous Malaysians, referred to locally as Orang Asli, in comparison to urban participants from the capital city of Malaysia, Kuala Lumpur. Results: We found that helminth infections had a larger effect on gut microbial composition than did dietary intake or blood profiles. Trichuris trichiura infection intensity also had the strongest association with blood transcriptional profiles. By characterizing paired longitudinal samples collected before and after deworming treatment, we determined that changes in serum zinc and iron levels among the Orang Asli were driven by changes in helminth infection status, independent of dietary metal intake. Serum zinc and iron levels were associated with changes in the abundance of several microbial taxa. Conclusions: There is considerable interplay between helminths, micronutrients and the microbiota on the regulation of immune responses in humans.

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Project description:Background: Parasitic helminths influence the composition of the gut microbiome. However, the microbiomes of individuals living in helminth-endemic regions are understudied. The Orang Asli, an indigenous population in Malaysia with high burdens of the helminth Trichuris trichiura, display microbiotas enriched in Clostridiales, an order of spore-forming obligate anaerobes with immunogenic properties. We previously isolated novel Clostridiales that were enriched in these individuals and found that a subset promoted the Trichuris life cycle. In this study, we aimed to further characterize the functional properties of these bacteria.Results: Clostridiales isolates were profiled for their ability to perform 57 enzymatic reactions and produce short chain fatty acids (SCFAs) and hydrogen sulfide, revealing that these bacteria were capable of a range of activities associated with metabolism and host response. Consistent with this finding, monocolonization of mice with individual isolates identified bacteria that were potent inducers of regulatory T cell (Treg) differentiation in the colon. Comparisons between variables revealed by these studies identified enzymatic properties correlated with Treg induction and Trichuris egg hatching.

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