Protection of zebrafish infected with A. hydrophila NJ-1 by AiiAAI96. Groups were as follows: group A was fed the CK diet and immersed in clean water, group B was fed the CK diet and immersed in A. hydrophila NJ-1-containing water, group C was fed the CK diet supplemented with 3.74 U AiiAB546 per gram of feed and immersed in clean water, group D was fed the CK diet supplemented with 3.74 U AiiAAI96 per gram of feed and immersed in clean water, group E was fed the CK diet supplemented with 3.74 U AiiAB546 per gram of feed and immersed in A. hydrophila NJ-1-containing water, and group F was fed the CK diet supplemented with 3.74 U AiiAAI96 per gram of feed and immersed in A. hydrophila NJ-1-containing water. Each value is the mean ± SD (n = 4). Data marked with * (0.01 < P < 0.05) and ** (P < 0.01) are significantly different between groups B and F; data marked with # (0.01 < P < 0.05) and ## (P < 0.01) are significantly different between groups E and F.