| No. (%) of positive strains |  | |||
---|---|---|---|---|---|
Virulence-associated gene/antimicrobial | A | B1 | B2 | D | Total |
(n = 35) | (n = 28) | (n = 1) | (n = 14) | (n = 78) | |
iutA | 6 (17.1)a | 7 (25.0)a | Â | 10 (71.4)b | 23 (29.5) |
iss | 2 (5.7)a | 8 (28.6) | Â | 6 (42.9)b | 16 (20.5) |
cvaC | 2 (5.7)a | 2 (7.1)a | Â | 5 (35.7)b | 9 (11.5) |
tsh | 1 (2.9) | 1 (3.6) | Â | 3 (21.4) | 5 (6.4) |
iroN | 4 (11.4)a | 8 (28.6) | Â | 7 (50.0)b | 19 (24.4) |
hlyF | 4 (11.4)a | 9 (32.1) | Â | 9 (64.3)b | 22 (28.2) |
ompT | 5 (14.3)a | 9 (32.1) | Â | 9 (64.3)b | 23 (29.5) |
Ampicillin | 16 (45.7) | 10 (35.7) | 1 | 7 (50.0) | 34 (43.6) |
Cefazolin | 6 (17.1) | 4 (14.3) | Â | 4 (28.6) | 14 (17.9) |
Ceftiofur | 4 (11.4) | 4 (14.3) | Â | 4 (28.6) | 12 (15.4) |
Dihydrostreptomycin | 11 (31.4) | 10 (35.7) | Â | 7 (50.0) | 28 (35.9) |
Gentamicin | 2 (5.7) | 1 (3.6) | Â | Â | 3 (3.8) |
Kanamycin | 7 (20.0) | 2 (7.1) | Â | 3 (21.4) | 12 (15.4) |
Oxytetracycline | 19 (54.3) | 13 (46.4) | 1 | 9 (64.3) | 42 (53.8) |
Chloramphenicol | 5 (14.3) | 4 (14.8) | Â | 1 (7.1) | 10 (12.8) |
Colistin | 1 (2.9) | Â | Â | Â | 1 (1.3) |
Nalidixic acid | 11 (31.4) | 10 (35.7) | Â | 9 (64.3) | 30 (38.5) |
Enrofloxacin | 5 (14.3) | 4 (14.3) | Â | 1 (7.1) | 10 (12.8) |
Trimethoprim | 9 (25.7) | 12 (42.9) | Â | 3 (21.4) | 24 (30.8) |