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Table 5 Prevalence of antibiotic resistance genes in the STEC strains isolated from raw milk and traditional dairy product samples

From: Prevalence, identification of virulence factors, O-serogroups and antibiotic resistance properties of Shiga-toxin producing Escherichia coli strains isolated from raw milk and traditional dairy products

Samples (No. STEC strains) Distribution of antibiotic resistance genes (%)
aadA1 tetA tetB dfrA1 qnr aac(3)-IV sul1 blaSHV CITM cat1 cmlA
Raw bovine milk (9) 3 (33.33) 7 (77.77) 1 (11.11) 5 (55.55) 1 (11.11) 9 (100) 4 (44.44) 3 (33.33) 9 (100) 1 (11.11)
Raw ovine milk (5) 3 (60) 4 (80) 1 (20) 3 (60) 1 (20) 5 (100) 2 (40) 1 (20) 5 (100) 1 (20)
Raw caprine milk (7) 4 (57.14) 5 (71.42) 2 (28.57) 4 (57.14) 2 (28.57) 7 (100) 2 (28.57) 2 (28.57) 7 (100) 1 (14.28)
Raw buffalo milk (10) 3 (30) 8 (80) 2 (20) 6 (60) 3 (30) 10 (100) 5 (50) 3 (30) 9 (90) 2 (20)
Cheese (17) 7 (41.17) 12 (70.58) 4 (23.52) 8 (47.05) 4 (23.52) 17 (100) 7 (41.17) 5 (29.41) 16 (94.11) 4 (23.52) 1 (755.88
Yoghurt (2) 1 (50) 2 (100) 1 (50) 2 (100) 1 (50) 1 (50) 2 (100)
Butter (4) 3 (75) 3 (75) 1 (25) 2 (50) 1 (25) 4 (100) 2 (50) 1 (25) 4 (100) 1 (25)
Cream (6) 4 (66.66) 5 (83.33) 1 (16.66) 3 (50) 1 (16.66) 6 (100) 2 (33.33) 2 (33.33) 6 (100) 1 (16.66)
Ice-cream (4) 3 (75) 3 (75) 1 (25) 3 (75) 1 (25) 4 (100) 2 (50) 2 (50) 4 (100) 1 (25)
Total (64) 31 (48.43) 49 (76.56) 13 (20.31) 35 (54.68) 14 (21.87) 64 (100) 27 (42.18) 20 (31.25) 62 (96.87) 12 (18.75) 1 (1.56)