Medycyna Wet. 62 (7), 814-816, 2006
Guz L.
Influence of metal ions on Aeromonas supernatant protease activity
Aeromonas organisms are widely distributed in aquatic environments and are also recognized as being pathogens in a variety of animals and humans. The aim of the study was to determine the effect of metal ions (Ca+2, Cu+2, Fe+2, Mg+2, Zn+2) and protease inhibitors (PMSF, EDTA, E-64) on the activity of Aeromonas supernatant caseinase and elastase activity. Sixteen strains of bacteria isolated from MAI/MAS diseased carp, identified as A. hydrophila (n=13) and A. sobria (n=3) were used in the study. Zinc and copper inhibited Aeromonas supernatant caseinase activity, where zinc, copper and iron inhibited elastase activity.
Keywords: Aeromonas, fish, protease