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The Journal of Medical Microbiology, Vol 37, Issue 5 299-303, Copyright © 1992 by Society for General Microbiology

JOURNAL ARTICLE

Haemagglutination profiles of Helicobacter species that cause gastritis in man and animals

N. S. Taylor, A. T. Hasubski, J. G. Fox and A. Lee
Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge 02139.

Thirty-five Helicobacter pylori isolates, 21 H. mustelae isolates and four strains of H. felis were compared for their ability to agglutinate red blood cells (RBCs). Isolates were examined in a slide haemagglutination assay with RBCs from 11 animal species, including rodents, carnivores and primates, as well as man. RBCs were agglutinated by 65-90% of H. mustelae isolates and 16-57% of H. pylori isolates. Treatment of H. mustelae with pronase and heat inhibited haemagglutination (HA) whereas heating only of H. pylori inhibited HA. Treatment of all strains of H. mustelae with trypsin inhibited agglutination of human RBCs; 75% of the treated strains did not agglutinate ferret RBCs. These results suggested that protein(s) may be important haemagglutinins for these bacteria. Variable HA profiles together with varying results after treatment of RBCs with fetuin, D-mannose, and neuraminidase suggested that multiple receptors may be involved in HA reactions with H. pylori and H. mustelae. The observation that H. mustelae and H. pylori agglutinated RBCs of several species and closely adhered to gastric epithelium supported the hypothesis that adherence plays a role in the colonisation and pathogenicity of H. mustelae and H. pylori. H. felis did not adhere to gastric epithelium and did not agglutinate RBCs of any species; nevertheless, H. felis can readily colonise and produce gastritis in several mammals.


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