Regarding to E. coli isolated from the examined raw market milk samples and as recorded in Table 3, 11(55%) out of 20 isolates were untypable, and the remaining isolates 9(45%) were serologically typed as O166. On the other hand 10 (83.3%) out of 12 isolates from the examined raw farm milk samples were untypable and the remaining isolates 2(16.7%) were serologically typed as O166.