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

Table 6.

Effect of GRE on the concentration of indicator microorganisms in the ceca of broiler chicks (Log₁₀ CFU/g cecal content) at d 27.

Treatments¹	Total bacteria	E. coli	Lactobacillus	Bifidobacteria
CON	7.38^a	7.94^a	6.33^c	6.37^c
MX	6.73^bc	7.89^a	6.40^c	6.46^c
GRE-0.375%	6.97^b	7.31^b	6.48^bc	6.84^b
GRE-0.75%	6.92^b	7.04^b	6.59^b	7.29^a
GRE-1.5%	6.40^c	6.99^bc	7.14^a	7.26^a
GRE-3%	6.33^c	6.63^c	6.99^a	7.03^ab
SEM	0.071	0.072	0.031	0.055
P-value	0.0001	0.0001	0.0001	0.0001

^a-c

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 0.055 g/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.