The object of the investigation was to test, whether a significant reductio
n of mortality might occur in glucan-treated fish compared to controls cons
isting of fish fed a glucan-free diet. Five different diets were tested com
bined with six pathogen/fish species variations. Mortality was compared to
matching controls and the results were statistically analysed. Enhanced res
istance to challenge with, A. hydrophila or Ps. fluorescens was found in th
e glucan-fed ornamentals.