Molecular Characterization of Shiga Toxin-Producing Escherichia coli Isolated from Ruminant and Donkey Raw Milk Samples and Traditional Dairy Products in Iran

Table 4

Distribution of virulence genes in E. coli isolated from raw animal milk samples and traditional dairy products in Iran.

Samples	Virulence genes
	stx1	stx2	eae	ehly	cnf1	cnf2	iutA	cdtB	papA	traT	sfaS	fyuA
Bovine milk	9	3	4	1	4	3	2	2	2	3	—	1
Ovine milk	3	1	2	—	2	1	5	—	2	2	—	—
Caprine milk	3	1	1	—	2	1	1	—	5	2	—	—
Buffalo milk	4	2	3	1	2	4	2	1	2	2	—	—
Camel milk	2	1	1	2	1	3	—	2	5	1	—	1
Donkey milk	1	1	1	2	6	1	—	1	1	3	1	2
Total milk	22	9	12	6	17	13	10	6	17	13	1	4
Soft cheese	2	1	2	2	2	1	2	—	2	6	—	—
Soft butter	—	—	2	1	2	1	2	1	2	1	—	—
Soft ice cream	1	1	2	—	1	3	1	1	4	1	—	—
Total dairy products	3	2	6	3	5	5	5	2	8	8	—	—
Total	25	11	18	9	22	18	15	8	25	21	1	4