Difference in the extracellular products of two strains of Aeromonas hydrophila virulent and weakly virulent for fish
1984
In this study we first compared the toxigenic profile of Aeromonas hydrophila strains virulent and weakly virulent for rainbow trout. The separation of the toxic factor for fish is also described. Both strains produced hemolytic, enterotoxic, and dermonecrotic activities; the weakly virulent strain produced 20 times more hemolysin. Only the cell-free supernatant of the virulent strain produced a toxic factor for fish. After passage on Sephacryl S-200, the toxic factor for fish was separated from the hemolysin. This toxic factor is heat labile.
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