Table 2.
Distribution of β-lactamase genes in ESBL/AmpC-producing E. coli isolates (n = 342) from food.
| Food | Sampling place | Number of isolates | ESBL genes | pAmpC genes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CTX-M-9 group | CTX-M-1 group | SHV12 | CIT group | DHA | |||||||||
| − | +TEMa | − | +TEMa | +CIT group | − | +TEMb | − | +TEMa | − | +TEMa | |||
| Chicken | 185 | 44 (23.8%) | 62 (33.5%) | 1 (0.5%) | 77 (41.6%) | 1 (0.5%) | |||||||
| Slaughterhouse | 111 | 6 | 19 | 0 | 22 | 0 | 0 | 1 | 11 | 52 | 1 | 0 | |
| Supermarkets | 73 | 5 | 14 | 8 | 30 | 2 | 0 | 0 | 1 | 13 | 0 | 0 | |
|
| |||||||||||||
| Pork | 75 | 41 (54.7%) | 15 (20.0%) | 0 (0%) | 19 (25.3%) | 0 (0%) | |||||||
| Slaughterhouse | 31 | 11 | 11 | 3 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | |
| Supermarkets | 44 | 14 | 5 | 2 | 10 | 0 | 0 | 0 | 3 | 10 | 0 | 0 | |
|
| |||||||||||||
| Beef | 38 | 12 (31.6%) | 10 (26.3%) | 2 (3.4%) | 14 (36.8%) | 0 (0%) | |||||||
| Slaughterhouse | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Supermarkets | 38 | 9 | 3 | 4 | 6 | 0 | 2 | 0 | 5 | 9 | 0 | 0 | |
|
| |||||||||||||
| Fish | 44 | 13 (29.5%) | 15 (34.1%) | 0 (0%) | 8 (18.2%) | 8 (18.2%) | |||||||
| Wholesale market | 24 | 3 | 2 | 7 | 5 | 0 | 0 | 0 | 2 | 2 | 2 | 1 | |
| Supermarkets | 20 | 5 | 3 | 0 | 3 | 0 | 0 | 0 | 1 | 3 | 2 | 3 | |
|
| |||||||||||||
| Total (number of isolates) | 342 | 110 (31.2%) | 102 (29.8%) | 3 (0.9%) | 118 (34.5%) | 9 (2.6%) | |||||||
a10 tested isolates harbored TEM-1 gene.
bOne isolate harbored TEM-135 gene.