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

Table 3

Prevalence of STEC serotypes isolated from raw animal milk samples and traditional dairy products in Iran.

Samples	E. coli positive (%)	O157 (%)	O145 (%)	O128 (%)	O121 (%)	O113 (%)	O111 (%)	O103 (%)	O91 (%)	O45 (%)	O26 (%)	Not detected (%)
Bovine milk (110)	23 (20.9)	3 (13.04)	1 (4.34)	2 (8.69)	1 (4.34)	1 (4.34)	3 (13.04)	1 (4.34)	1 (4.34)	3 (13.04)	2 (8.69)	5 (21.73)
Ovine milk (98)	9 (9.18)	1 (11.11)	—	—	—	—	—	1 (11.11)	1 (11.11)	1 (11.11)	1 (11.11)	4 (44.44)
Caprine milk (85)	8 (9.41)	1 (12.5)	—	1 (12.5)	—	—	1 (12.5)	—	—	1 (12.5)	1 (12.5)	3 (37.5)
Buffalo milk (52)	8 (15.38)	1 (12.5)	—	—	1 (12.5)	—	1 (12.5)	—	—	—	1 (12.5)	4 (50)
Camel milk (44)	3 (6.81)	1 (33.33)	—	—	—	1 (33.33)	—	—	—	—	—	1 (33.33)
Donkey milk (35)	6 (17.14)	4 (66.66)	—	—	—	—	1 (16.66)	—	—	—	—	1 (16.66)
Total milk (424)	57 (13.44)	11 (19.29)	1 (1.75)	3 (5.26)	2 (3.5)	2 (3.5)	6 (10.52)	2 (3.5)	2 (3.5)	5 (8.77)	5 (8.77)	18 (31.57)
Soft cheese (106)	25 (23.58)	2 (8)	1 (4)	1 (4)	1 (4)	1 (4)	2 (8)	1 (4)	—	1 (4)	8 (32)	7 (28)
Soft butter (99)	11 (11.11)	1 (9.09)	—	—	—	—	1 (9.09)	1 (9.09)	—	—	3 (27.27)	5 (45.45)
Soft ice cream (90)	9 (10)	—	—	—	—	—	1 (11.11)	2 (22.22)	—	—	2 (22.22)	4 (44.44)
Total dairy products (295)	45 (15.25)	3 (6.66)	1 (2.22)	1 (2.22)	1 (2.22)	1 (2.22)	4 (8.88)	4 (8.88)	—	1 (2.22)	13 (28.88)	16 (35.55)
Total (719)	102 (14.18)	14 (13.72)	2 (1.96)	4 (3.92)	3 (2.94)	3 (2.94)	10 (9.8)	6 (5.88)	2 (1.96)	6 (5.88)	18 (17.64)	34 (33.33)