Prevalence rate of E. coli among different ages of the examined ducks 

Detection of DNA virulence-associated genes in E. coli serotypes isolated from ducks. A representative DNA gel electrophoresis image for a multiplex PCR reaction for virulence-associated genes including tsh (284 bp), astA (422 bp) and iroN (617 bp) in E. coli serotypes (O55, O127, 0111, O114, O78 and O26). M refers to a 100 bp DNA marker, C- refers to a negative control while C+ refers to a positive control. 

Tissue distribution of the identified E. coli serotypes isolated from ducks. Incidence (%) of the identified E. coli serotypes from different tissues of the diseased ducks collected from Sharkia Governorate, Egypt (n=40).