Aeromonas species in a municipal water supply of a central European city: biotyping of strains and detection of toxins.

In the course of a one-year study, 78 out of 239 samples from a Central European municipal water supply were found to contain Aeromonas species. Biotyping and hemolysin titers according to the criteria of Burke et al. (1) showed that almost 50% of the tested strains can be presumed to be enterotoxin-producing. The remaining microbiological parameters met international standards (20).