Table 1. Percentage (95% CI) of E. coli positive samples that demonstrate resistance by number of antimicrobial drugs and antimicrobial classes in raccoon fecal, paw, soil, and dumpster samples by location in southern Ontario.
| Number of Antimicrobial Drugs | Total | Conservation Area | Swine Farm | ||||||
|---|---|---|---|---|---|---|---|---|---|
| All Samples [n = 2752] a | Feces [n = 655] | Soil [n = 637] | Paw [n = 179] | Dumpster [n = 29] | Feces [n = 389] | Soil [n = 623] | Paw [n = 186] | Manure Pit [n = 54] | |
| 1 | 4.6 (3.8–5.4) | 4.3 (2.8–6.1) | 3.8 (2.4–5.6) | 3.9 (1.6–7.9) | 6.4 (0.8–22.8) | 2.3 (1.1–4.3) | 6.3 (4.5–8.4) | 2.7 (0.9–6.2) | 22.2 (12.0–35.6) |
| 2 | 1.8 (1.3–2.3) | 0.6 (0.2–1.6) | 0.8 (0.2–2.0) | 1.7 (0.3–4.8) | 0 (0–11.9) b | 2.0 (0.9–4.0) | 2.1 (1.1–3.5) | 0 (0–0.02) b | 24.1 (13.5–37.6) |
| 3–12 | 3.0 (2.4–3.7) | 2.9 (1.8–4.5) | 2.7 (1.6–4.2) | 3.9 (1.6–7.9) | 6.9 (0.8–22.8) | 2.3 (1.1–4.3) | 3.4 (2.1–5.1) | 0.5 (0.01–3.0) | 11.1 (4.2–22.6) |
| Number of Antimicrobial Drug Classes | |||||||||
| 1 | 5.6 (4.8–6.6) | 5.0 (3.5–7.0) | 5.3 (3.7–7.4) | 6.1 (3.1–10.7) | 6.9 (0.8–22.8) | 2.8 (1.4–5.0) | 7.4 (5.4–9.7) | 2.7 (0.9–6.2) | 22.2 (12.0–35.6) |
| 2 | 1.8 (1.4–2.4) | 1.1 (0.4–2.2) | 0.9 (3.5–2.0) | 2.2 (0.6–5.6) | 0 (0–11.9) b | 2.0 (0.9–4.0) | 2.2 (1.2–3.7) | 0 (0–0.02) b | 24.1 (13.5–37.6) |
| 3 | 0.8 (0.5–1.2) | 0.6 (0.2–1.6) | 0.8 (0.3–1.8) | 1.1 (1.4–4.0) | 3.4 (0.1–17.8) | 0.8 (0.2–2.2) | 0.8 (0.3–1.9) | 0.5 (0.01–3.0) | 5.5 (1.2–15.4) |
| 4 | 0.7 (0.0–1.1) | 0.6 (0.2–1.6) | 0.5 (0.1–1.4) | 0 (0–0.02) b | 0 (0–11.9) b | 0.8 (0.2–2.2) | 1.1 (0.4–2.3) | 0 (0–0.02) b | 3.7 (0.4–12.7) |
| 5 | 0.1 (0.04–0.4) | 0 (0–0.006) b | 0 (0–0.006) b | 0 (0–0.02) b | 3.4 (0.1–17.8) | 0.2 (0.01–1.4) | 0.2 (0.004–0.9) b | 0 (0–0.02) b | 1.9 (0.05–9.9) |
| 6 | 0.1 (0.04–0.4) | 0.4 (0.1–1.3) | 0 (0–0.006) b | 0 (0–0.02) b | 0 (0–11.9) b | 0 (0–0.009) b | 0 (0–0.006) b | 0 (0–0.02) b | 0 (0–0.7) b |
| Total Reduced Susceptibility to ≥ 1 Antimicrobial | 9.3 | 7.8 | 7.5 | 9.5 | 13.8 | 6.7 | 11.7 | 3.2 | 57.4 |
| (8.2–10.4) | (5.9–10.1) | (5.6–9.9) | (5.6–14.8) | (3.9–31.7) | (4.4–9.6) | (9.3–14.5) | (1.2–6.9) | (43.2–70.8) | |
| Total Susceptible | 90.7 | 92.2 | 92.5 | 90.5 | 86.2 | 93.3 | 88.3 | 96.8 | 40.7 |
| (89.6–91.8) | (89.9–94.1) | (90.1–94.4) | (85.2–94.4) | (68.3–96.1) | (90.4–95.6) | (85.5–90.7) | (93.1–98.8) | (27.6–55.0) | |
a n = total number of E. coli positive samples.
b One-sided, 97.5% confidence interval.