Changes to the microbiome in the gut may explain why related conditions are linked to different risk levels and types of gastric tumors, according to a new study.

What are the microbiota and microbiome?

The microbiota is an “ecological community of commensal, symbiotic and pathogenic microorganisms” found in and on all multicellular organisms. A microbiota includes various bacteria, archaea, protists, fungi, and viruses. The microbiota has been found to be crucial for the immunologic, hormonal and metabolic balance (homeostasis) of its host.

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