Mice, Inbred C57BLMice, Inbred C3HAnimals, Outbred StrainsSpecies SpecificityMolecular Sequence DataAmino Acid SequencePhylogenySequence Homology, Amino AcidBase SequenceSequence Analysis, DNARNA, Ribosomal, 16SSequence AlignmentDNA, RibosomalCloning, MolecularDNA, BacterialSequence Homology, Nucleic AcidBase CompositionGenes, rRNABacterial Typing TechniquesBacterial Proteins