Hemagglutination patterns of Aeromonas spp. in relation to biotype and source

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Abstract
Aeromonas spp. showed patterns of hemagglutination with human group O cells in the presence of fucose, galactose and mannose. These patterns were related to biotype and the source of isolates. There was good correlation between hemagglutination pattern and the presence of diarrhea among strains isolated in Western Australia, which was the only source with adequate data for classification of children with and without diarrhea. Most of the environmental and other nonfecal isolates produced patterns different from those in strains associated with diarrhea. Evidently, hemagglutinins should be considered with enterotoxins as virulence factors in Aeromonas spp.