BIOLOGICAL AND IDENTIFICATION CHARACTERISTICS OF BACILLUS SUBTILIS KT 42 USING AS BACTERIAL CANDIATE FOR PROBIOTIC PRODUCTION IN AQUACULTURE

Abstract

Among hundreds of Bacillus strains isolated from soil samples, a strain KT42 was selected basing on its high activity to producing a series of exoenzymes, such as amylase, protease, cenllulase, chitinase and lipase. The strain was also inhibited antibiotic activity with wide spectrum against Grampositive, Gramnegative bacteria and fungi, especially, Vibrio parahaemolyticus – a most common pathogen in shrimp. Ovioustly, this strain was capable of rapidly degrading undesirable organic substances in aquaculture pond and possess antibacterial properties against common diseases in shrimp. With aboved properties, the strain Bacillus subtilis KT42 was worthy to be under consideration as candidate strain for probiotic production.