IPEC-1 cells were treated with different concentrations of puerarin(PR),ethyl pyruvate(EP),tyrosol(TS)or zinc oxide(ZnO),and then cell viability was detected by CCK-8 method.The lactate dehydrogenase(LDH)kit was used to detect the effect of functional substances on the cytotoxic effects of ETEC K88.Real-time PCR was used to detect the effects of different functional substances on the rel-ative expression levels of genes related to IPEC-1 cells infected with ETEC K88.Results ∶PR,EP and ZnO could promote the proliferation of IPEC-1 cells,and the...