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Distribution of Indigenous Lactobacilli in the Digestive Tract of Conventional and Gnotobiotic Rats
Author(s) -
Watanabe Tsugio,
Morotomi Masami,
Suegara Nobuo,
Kawai Yasuo,
Mutai Masahiko
Publication year - 1977
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.1977.tb00280.x
Subject(s) - lactobacillus fermentum , biology , lactobacillus acidophilus , gastrointestinal tract , lactobacillus , population , caecum , stomach , microbiology and biotechnology , small intestine , large intestine , medicine , fermentation , bacteria , probiotic , food science , endocrinology , lactic acid , biochemistry , lactobacillus plantarum , genetics , environmental health
Distribution of indigenous lactobacilli in the gastrointestinal tracts of rats was investigated at the species level. The indigenous lactobacilli isolated from conventional rats were divided into three groups, Lactobacillus acidophilus and its related strains, L. fermentum , and L. murini . Localization of the Lactobacillus groups in the gastrointestinal tracts could be distinguished clearly based on arabinose and glucose fermentation reaction of isolates from each part of the gastrointestinal tract. Group I ( L. acidophilus and the related strains) and Group II ( L. fermentum ) were the major populations of lactobacilli on the walls of the non‐glandular part and in the contents of the stomachs of both conventional and gnotobiotic rats. Group I predominated in all the parts of the digestive tract of conventional rats, whereas Group II was in the minority in the lower part of the gastrointestinal tracts of both groups of rats. Group III ( L. murini ) was the predominant population of Lactobacillus in the lower part of small intestine of conventional rats and in all parts of the gastrointestinal tracts of gnotobiotic rats except for the wall of the non‐glandular part of the stomach.