Production of Extracellular Enzymes by Pathogenic Vibrio spp. in Fish

Dhevendaran K.; Georgekutti M.I.

doi:10.56093/ft.v35i2.23140

Authors

Dhevendaran K. Department of Aquatic Biology and Fisheries, University of Kerala, Trivandrum
Georgekutti M.I. Department of Aquatic Biology and Fisheries, University of Kerala, Trivandrum

https://doi.org/10.56093/ft.v35i2.23140

Keywords:

Vibrio spp., extracellular enzymes, haemolysin, arylsulfatase

Abstract

Production of extracellular enzymes and haemolysin in a few species of Vibrio was examined. Majority of Vibrio spp. produced lipase, protease and arylsulfatase. More than 90% of the strains released haemolysin on fish blood agar and a few on calf blood and sheep blood agar. Representative strains isolated from fish showed lethality against white mice. Infected parts of fish harboured arylsulfatase producing bacteria. The pH activity curve of arylsulfatase showed a primary peak at pH 5.2 and secondary peak at pH 6.2.