Links between environment, diet, and the hunter-gatherer microbiome

Area of Science:

• Microbiology
• Human Ecology
• Anthropology

Background:

• Traditional populations offer insights into human-associated microbes unperturbed by industrialization.
• Studying these groups reveals the microbiota that co-evolved with humans.

Purpose of the Study:

• To characterize the microbiota of the Hadza hunter-gatherers in Tanzania.
• To investigate seasonal variations and lifestyle influences on the Hadza gut microbiome.

Main Methods:

• Microbiota analysis of the Hadza population.
• Comparative analysis with global microbiota data.
• Assessment of environmental and lifestyle factors.

Main Results:

• Significant seasonal shifts in bacterial taxa, diversity, and carbohydrate utilization were observed.
• The Hadza microbiota shares bacterial families with other traditional societies, distinct from industrialized nations.
• Microbiota composition varies with sex, age, and environmental exposures (hands, water, animals).

Conclusions:

• The Hadza microbiota provides a model for understanding human-microbe co-evolution.
• Dietary shifts, even short-term introduction of agricultural products, impact the microbiota.
• Future research should continue exploring the interplay between traditional lifestyles and microbial communities.