Germfree rats.
D000821:Animal Feed; D000818:Animals; D004032:Diet; D004780:Environment, Controlled; D005856:Germ-Free Life; D006799:Housing, Animal; D004364:Pharmaceutical Preparations / Q000378:metabolism; D051381:Rats; D011919:Rats, Inbred Strains; D013242:Sterilization
D004364:Pharmaceutical Preparations