TABLE 2.
Identification confidence level of isolates as determined by API-20E enterobacterial identification strips, stratified by isolate source
| Isolate source | No. of isolates | No. (%) of isolates at each confidence level |
No. (%) of isolates identified to genus level | No. (%) of isolates that were not E. coli | ||||
|---|---|---|---|---|---|---|---|---|
| Excellent (≥99.9%) | Very good (99.0–99.8%) | Good (90.0–98.9%) | Acceptable (80.0–89.9%) | Low | ||||
| Fecal composites | 92 | 10 (11) | 52 (57) | 16 (17) | 0 (0) | 5 (8) | 7 (5) | 2 (2) |
| Cattle | 32 | 6 (19) | 16 (50) | 5 (16) | 0 (0) | 4 (13) | 0 (0) | 1 (3) |
| Chicken | 32 | 1 (3) | 21 (66) | 6 (19) | 0 (0) | 3 (9) | 0 (0) | 1 (3) |
| Human | 28 | 3 (11) | 15 (54) | 5 (18) | 0 (0) | 0 (0) | 5 (18) | 0 (0) |
| Hand | 95 | 21 (22) | 48 (51) | 17 (18) | 0 (0) | 0 (8) | 8 (0) | 1 (1) |
| Soil | 95 | 12 (13) | 56 (59) | 17 (18) | 1 (1) | 7 (7) | 2 (2) | 0 (0) |
| Total | 282 | 43 (15) | 156 (55) | 50 (18) | 1 (0) | 7 (8) | 22 (2) | 4 (1) |