What term describes animals that were originally germ-free but were given a known group of bacteria?

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Multiple Choice

What term describes animals that were originally germ-free but were given a known group of bacteria?

Explanation:
This scenario describes defined flora. In lab animal work, a germ-free animal can be deliberately inoculated with a known, specific group of microorganisms, so the resulting microbiota is defined and trackable. This allows researchers to study host responses to particular microbes or microbial consortia with a controlled baseline. It differs from axenic, which means completely free of microbes; Specific Pathogen Free, which means free of certain listed pathogens but not necessarily a defined overall microbiota; and normal or conventional, which have an uncontrolled, mixed microbial community.

This scenario describes defined flora. In lab animal work, a germ-free animal can be deliberately inoculated with a known, specific group of microorganisms, so the resulting microbiota is defined and trackable. This allows researchers to study host responses to particular microbes or microbial consortia with a controlled baseline. It differs from axenic, which means completely free of microbes; Specific Pathogen Free, which means free of certain listed pathogens but not necessarily a defined overall microbiota; and normal or conventional, which have an uncontrolled, mixed microbial community.

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