author(s)
Prakash Pavadi, Shivananda H Murthy, Badami R Honnananda and Binod Kumar Choudhary

abstract
Infectial trial, disease resistance against white muscle disease virus, phenoloxidase activity and respiratory burst were investigated during the year 2008-2009 at college of fisheries, Mangalore, India in Macrobrachium rosenbergii juveniles (1.5 ±1.20 g) which were fed diets containing 1.0, 1.5 and 2.0 g/kg ß-1, 3-glucan for three months in growth trial. In eight days of challenge study, prawn fed diet devoid of ß1-3 glucan lead to 60% mortality within five days. The mortality of prawn fed with 1.0, 1.5 and 2.0 g/kg of ß-1,3-glucan containing diet were 46.66, 26.60 and 40% respectively. In the present study, M. rosenbergii fed diet containing 1.5 g/ kg ß-1, 3-glucan had enhanced disease resistance against white muscle disease virus, phenoloxidase activity and respiratory burst.