Figure 5.

Effects of dietary CPCMP supplementation on the expression levels of tight junction-associated genes of broilers at 42 d. BC, blank control, basal diet; CPCMP, basal diet supplemented with 0.2% Chinese medicine–probiotic compound microecological preparation; PC, positive control, basal diet supplemented with 0.0035% chlortetracycline; commercial CPCMP, basal diet supplemented with 0.2% commercially available CPCMP; TCM, basal diet supplemented with 0.2% fermented traditional Chinese medicines; Probiotics, basal diet supplemented with 0.2% compound probiotics. The mRNA expression levels of (A) OCLN and (B) ZO-1 in the jejunal mucosa were determined by qRT-PCR. Results are presented as mean ± standard error (n = 5; 5 replicates/treatment, 2 broilers/replicate). ^a-dMeans that do not share common letters differ significantly (P < 0.05). Abbreviations: OCLN, occludin; ZO-1, zonula occludens-1.