Occurrence of pathogenic and faecal Escherichia coli in layer hens
A total of 117 Escherichia coli from colibacillosis elbeco adu ripstop pants affected (APEC) and clinically healthy birds (AFEC) were serotyped and tested for the presence of virulence genes: iss, tsh, cva.A total of 54.5% E.Coli were typeable and 15 different serogroups were identified.The most common serogroups among APEC strains were O78, O2 and