Figure-6.

Reverse transcription-polymerase chain reaction analyses for the expression of pro-inflammatory cytokine (IL-6, IL-8, and IL-10) in the ileum of birds challenged with different serotypes of Escherichia coli (O78, O26, O55, and O44). Data were expressed as mean±standard error. The different letters indicate a significant difference (p<0.05) between experimental groups.