Table 4.
Generation and lag-phase times (±standard deviation) (min) for nine independent intestinal enterococci isolates from three CIP resistance classes in different ciprofloxacin concentrations (µg l−1)
| 0 (µg l−1) | 100 (µg l−1) | 500 (µg l−1) | 1000 (µg l−1) | 4000 (µg l−1) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CIP resistance class | Generation time (min) | Lag-phase time (min) | Generation time (min) | Lag-phase time (min) | Generation time (min) | Lag-phase time (min) | Generation time (min) | Lag-phase time (min) | Generation time (min) | Lag-phase time (min) |
| Resistant | 39.8±0.2 | 127±12 | 39.8±0.1 | 127±12 | 40.2±0.4b’ | 130±17 | 46.6±3.9b,c’ | 138±19 | 52.8±6.6 | 150±17 |
| Intermediate | 40.4±11 | 133±21 | 40.4±0.1 | 133±21 | 43.9±0.3b’ | 133±7.6 | 109±18 | 120±20 | – | – |
| Sensitive | 40.4±11 | 97±6a | 42.1±14 | 97±6a | 61.2±9.6 | 90±10b | 175±21 | 90±10a’ | – | – |
aStatistically shorter time (P<0.05).
a’Statistically shorter time than the longer of the other two (P<0.05).
bStatistically shorter time (P<0.01).
b'Statistically shorter time than the longer of the other two (P<0.01).
c’Statistically shorter time than the longer of the other two (P<0.001).