Table 5.

Prevalence rates of E. coli isolates from milk and milk by-products.

Sample source	No. of examined samples	No. of recovered isolates of E. coli/total no. of original samples
		No.	%
Cairo	50	19	38.0d
Giza	50	22	44.0c
Fayoum	50	25	50.0b
Beni Suef	50	16	32.0e
Menofia	50	22	44.0c
Alexandria	50	16	32.0e
Qalyubia	50	28	56.0a
Total	350	148	42.3
p-value		0.000**

^a,b,c Means in the same column bearing different superscripts are significantly different.

^**Significant differences at p=0.01. E. coli=Escherichia coli