The widespread use of broad-spectrum chemotherapeutics to
combat such health related problems has led to the development
and spread of drug resistant pathogens, environmental hazards and
food security problems [5]. Use of probiotics has been gaining
importance for disease prevention in aquaculture as an eco-friendly
alternative to antibiotics and other drugs [6]. Probiotics exert
beneficial effects on the host by providing nutrients and enzymatic
contribution to digestion, improving water quality, enhancing
growth, inhibiting pathogenic microorganisms and enhancing immune
response [7,8]. The most commonly used probiotics in fish
farming belong to gram positive spore forming Bacillus spp [6].