2.6. Human stool and hand swabs samples examination
The collected swabs in BPW were incubated at 37 C for 24 h
then all samples were subjected to the same laboratory diagnostic
techniques as done in milk samples as mentioned
before.
2.7. Serological identification of E. coli isolates
Serological identification of the strains was carried out in the
Clinical Microbiology Unite, Central Health Laboratories of
Ministry of Health, Egypt.