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Table 5 Distribution of antibiotic resistance genes in STEC serogroups isolated from fermented dairy products in Iran

From: Virulence factors, serogroups and antimicrobial resistance properties of Escherichia coli strains in fermented dairy products

STEC serotypes Antibiotic resistance genes
aadA1 tetA tetB dfrA1 qnr aac( 3)-IV Sul1 blaSHV CITM ereA cat1 cmlA
O157 (13) 4 9 11 1 1 5 2 6 6 4 3 3
O145 (3) 2 3 2 1 1 1 1 3 2 1 1 1
O128 (4) 1 4 4 - 1 2 1 1 1 1 1 1
O121 (2) - 2 2 - - - 1 2 - - 1 1
O113 (3) - 2 1 - - - - - - - - -
O111 (3) - 1 1 - - - - - - - - -
O103 (3) - 1 1 - - - - - - - - -
O91 (2) - 1 - - - - - - - - - -
O45 (2) - 2 1 - - - - - 1 - - -
O26 (6) 2 5 6 1 1 2 1 3 2 1 1 1
Non detected (9) 6 8 6 2 2 6 3 4 6 2 4 5
Total (50) 15 (30) 38 (76) 35 (70) 5 (10) 6 (12) 16 (32) 9 (18) 19 (38) 18 (36) 9 (18) 11 (22) 12 (24)