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The Attachment of Bacteria to the Gastric Epithelium of the Pig and its Importance in the Microecology of the Intestine
Author(s) -
BARROW P. A.,
BROOKER B. E.,
FULLER R.,
NEWPORT M. J.
Publication year - 1980
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1980.tb05216.x
Subject(s) - lactobacillus fermentum , microecology , microbiology and biotechnology , bacteria , biology , adhesion , epithelium , streptococcus salivarius , protease , small intestine , escherichia coli , lactic acid , chemistry , streptococcus , biochemistry , lactobacillus plantarum , enzyme , genetics , organic chemistry , gene
Some characteristics of the association between lactic acid bacteria and pig squamous epithelial cells were studied. Strains from several sources were tested for adhesion in vitro but only those from pigs and chickens attached. The adhesion rate of pig isolates was very variable and, of the isolates tested, strains of Lactobacillus fermentum and Streptococcus salivarius attached in largest numbers. These strains were selected for further study. They did not attach to columnar epithelial cells from the small and large intestine. Adhesion was reduced by sodium periodate or protease. Both strains had a microcapsule with fibrils which stained with ruthenium red. The adhesive bond between lactobacilli and squamous tissue was strong enough to resist washing 50 times but there was a persistent release of bacteria during the washing process. When the strains of both species or of L. fermentum alone were fed to artificially reared pigs there was a statistically significant reduction in the numbers of Escherichia coli in the stomach.