. 2023 Jul 11;102(10):102897. doi: 10.1016/j.psj.2023.102897

Table 7.

Effect of GRE on the concentration of indicator microorganisms in the ceca of broiler chicks (Log₁₀ CFU/g cecal content) at d 41.

Treatments¹	Total bacteria	E. coli	Lactobacillus	Bifidobacteria
CON	5.23^a	4.86^a	4.12^c	4.09^c
MX	4.52^b	4.23^cd	4.65^b	4.75^ab
GRE-0.375%	4.57^b	4.43^b	5.20^a	4.94^a
GRE-0.75%	4.58^b	4.29^c	4.70^b	4.82^ab
GRE-1.5%	4.55^b	4.14^de	4.63^b	4.70^ab
GRE-3%	4.35^b	4.09^e	4.57^b	4.58^b
SEM	0.073	0.022	0.033	0.059
P-value	0.0001	0.0001	0.0001	0.0001

^a-e

Mean values bearing different superscript letters within a column are significantly different (P < 0.05). n = 12 birds per treatment.

Treatment CON consisted of chicks fed unmedicated corn–soybean meal (SBM) basal without GRE; Treatment MX consisted of chicks given unmedicated corn–SBM basal into which bacitracin methylene disalicylate (BMD) was added at 0.055g/kg diet; Treatment GRE-0.375% consisted of chicks given unmedicated corn–SBM basal into which GRE was added at 0.375% level; Treatments GRE-0.75%, GRE-1.5%, and GRE-3% consisted of chicks that were given diets similar to GRE-0.375% consisted of chicks that were given diets similar to GRE1 at 0.75%, 1.5%, and 3%, respectively.