Association of germ-free rats with different microfloras.
D000818:Animals; D004926:Escherichia coli / Q000254:growth & development*; D005260:Female; D005856:Germ-Free Life; D007422:Intestines / Q000382:microbiology*; D008297:Male; D008855:Microscopy, Electron, Scanning; D051381:Rats / Q000382:microbiology*; D011919:Rats, Inbred Strains