Embryo Lethality Assay for Determining Virulence of Avian Escherichia coli

In order to determine the potential of ELA(embryo lethality assay) for determining virulence of avian E.coli,an embryo lethality assay of 20 isolates was linked with a chicken ethality assay to analyze their association.In this study,8 isolates from colisepticemia were higher virulent,with 40%-70% embryo lethality.10 of 12 from chicken feces were less virulent,with 0%-20% embryo lethality.And the embryo lethality was associated with chicken lethality.This study suggested that ELA may be correlated with virulence of avian E.coli,and may be a method for determining virulence of avian E.coli.