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Lectin Activity and Chemical Characteristics of Escherichia coli, Lactobacillus spp. and Bifidobacterium spp. from Gastrointestinal Mucosa of Growing Pigs
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 Title & Authors
Lectin Activity and Chemical Characteristics of Escherichia coli, Lactobacillus spp. and Bifidobacterium spp. from Gastrointestinal Mucosa of Growing Pigs
Gao, W.; Meng, Q.X.;
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 Abstract
Lectin activities and chemical characteristics of Escherichia coli, Lactobacillus spp. and Bifidobacterium spp. originating from the porcine cecal mucosal layer were studied based on hemagglutination assay (HA) and hemagglutination inhibition assay (HIA). Although all the bacterial strains were able to agglutinate erythrocytes of porcine or rabbit origin, much higher HA titers were consistently observed for Lactobacillus spp. than for E. coli or for Bifidobacterium spp. A remarkable reduction in HA titers occurred by the treatment of E. coli and Lactobacillus spp. with protease or trypsin and of Bifidobacterium spp. with protease, trypsin or periodate. There were no significant effects on the HA titers of the three groups of bacteria after the treatment with lipase. Hemagglutination of E. coli was strongly inhibited by D (+)-mannose and D (+)-galactose; Lactobacillus spp. by -L-rhamnose and methyl--galactopyranoside; Bifidobacterium spp. by D (+)-alactose, -L-rhamnose, -L-fucose, L (+)-arabinose, D (+)-mannose, D (-)-fructose at a relatively low concentration (1.43 to 3.75 mg/ml). These results, combined with the enhanced HA activities of the three bacterial strains by modification of rabbit erythrocytes with neuraminidase and abolished HA activity of E. coli after treatment with -galactosidase, indicate that it might be the glycoproteinous substances surrounding the surface of the bacterial cells that are responsible for the adhesions of these microorganisms by recognizing the specific receptors on the red blood cell.
 Keywords
Indigenous Gastrointestinal Bacteria;Escherichia coli;Lactobacillus spp.;Bifidobacterium spp.;Lectins;Growing Pigs;
 Language
English
 Cited by
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