Table 1 Percentage of fecal Escherichia coli isolates from Ontario small poultry flocks that were resistant to 14 selected antimicrobials, as determined by a broth microdilution technique, by poultry species
Antimicrobial class | AntimicrobialA | Chicken (N = 358) | Turkey (N = 27) | Duck (N = 24) | Game birds (N = 24) |
|---|---|---|---|---|---|
n (%)B [CI]C | n (%) [CI] | n (%) [CI] | n (%) [CI] | ||
Aminoglycosides | GEN | 23 (6.42) [4.12–9.48] | 1 (3.70) [0.09–18.97] | 0 | 0 |
STR | 105 (29.33) [24.66–34.34] | 10 (37.04) [19.40–57.63] | 2 (8.33) [1.03–27.00] | 8 (33.33) [15.63–55.32] | |
β-Lactams | AMP | 57 (15.92) [12.29–20.13] | 11 (40.74) [22.39–61.20] | 1 (4.17) [0.11–21.12] | 1 (4.17) [0.11–21.12] |
AMC | 8 (2.23) [0.97–4.36] | 2 (7.41) [0.91–24.29] | 0 | 0 | |
CRO | 4 (1.12) [0.31–2.84] | 2 (7.41) [0.91–24.29] | 0 | 0 | |
FOX | 5 (1.40) [0.46–3.23] | 1 (3.70) [0.09–18.97] | 0 | 0 | |
MER | 0 | 0 | 0 | 0 | |
Folate inhibitors | SSS | 61 (17.04) [13.29–21.34] | 10 (37.04) [19.40–57.63] | 5 (20.83) [7.13–42.15] | 2 (8.33) [1.03–27.00] |
STX | 30 (8.38) [5.73–11.75] | 3 (11.11) [2.35–29.16] | 4 (16.67) [4.74–37.38] | 0 | |
Macrolides | AZM | 5 (1.40) [0.46–3.23] | 0 | 2 (8.33) [1.03–27.00] | 0 |
Phenicols | CHL | 17 (4.75) [2.79–7.49] | 3 (11.11) [2.35–29.16] | 1 (4.17) [0.11–21.12] | 0 |
Quinolones | CIP | 1 (0.28) [0.007–1.55] | 3 (11.11) [2.35–29.16] | 1 (4.17) [0.11–21.12] | 0 |
NAL | 8 (2.23) [0.97–4.36] | 3 (11.11) [2.35–29.16] | 1 (4.17) [0.11–21.12] | 0 | |
Tetracyclines | TET | 155 (43.30) [38.10–48.61] | 22 (81.48) [61.92–93.70] | 10 (41.67) [22.11–63.36] | 9 (37.50) [18.80–59.41] |