Abstract
A transposon mutant from Aeromonas hydrophila AH-3 was obtained which was highly resistant to opsonophagocytosis. The mutation was identified in the ftsE gene and we characterised the operon ftsY, E and X from this bacterium. These genes, as in enteric bacteria, are neighbours to rpoH. The A. hydrophila ftsE and X genes were fully able to complement Escherichia coli ftsE mutants, and also complement the opsonophagocytosis-resistant phenotype of the A. hydrophila mutant strain. This phenotype seems to be related to the filamentous phenotype at 37°C exhibited by the A. hydrophila ftsE mutant.
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