Fig. 3
From: A probiotic Brevibacillus laterosporus promotes chicken growth performance immunity and gut health

Digestive enzyme activity in intestine of chickens on day 63. (a) Protease activity, (b) Cellulase activity, (c) Amylase activity. a, b, c Different superscript small letters within a row indicated a significant difference (p < 0.05). A, B, C Different superscript uppercase letters within a row indicated a highly significant difference (p < 0.01), three groups (n = 6 per group) on day 63.