TABLE 1.
MICs for C. jejuni isolates from meat (n = 69) and raw water (n = 9)
| Substance | Origin of isolate | No. of isolates for which MIC (mg/liter) wasa:
|
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| <0.03 | 0.06 | 0.12 | 0.25 | 0.5 | 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | >128 | ||
| Nalidixic acid | Meat | — | 3 | 44 | 14 | 3 | — | — | — | 5 | |||||
| Water | — | 1 | 7 | 1 | — | — | — | — | |||||||
| Enrofloxacin | Meat | — | 4 | 51 | 9 | — | — | — | — | 5 | |||||
| Water | — | 2 | 7 | — | — | — | — | — | |||||||
| Ampicillin | Meat | 6 | 5 | 9 | 33 | 9 | 3 | 1 | 2 | 1 | |||||
| Water | — | — | 2 | 7 | — | — | — | — | |||||||
| Oxytetracycline | Meat | 47 | 15 | 2 | 1 | — | 3 | — | — | 1 | |||||
| Water | 4 | 2 | 2 | — | — | — | — | 1 | |||||||
| Erythromycin | Meat | — | 6 | 26 | 23 | 13 | 1 | — | — | ||||||
| Water | 1 | 1 | 3 | 2 | 2 | — | — | — | |||||||
| Gentamicin | Meat | — | 13 | 51 | 5 | — | — | ||||||||
| Water | — | 6 | 3 | — | — | — | |||||||||
a
Data in lightface type are for the range of concentrations tested for each substance. Data for MICs above the range (shown in boldface type) are given under the concentration closest to the range, and data for MICs equal to or less than the lowest concentration tested are given under the lowest tested concentration. —, no isolates. Breakpoints for resistance were as follows: for nalidixic acid, ampicillin, and erythromycin, >16 mg/liter; for oxytetracycline and gentamicin, >8 mg/liter; for enrofloxacin, >1 mg/liter.