TABLE 1.
Distribution of the 75 N. meningitidis strains tested in this study according to PCR-RFLP and susceptibility to penicillin (MICs)
| Penicillin MIC (μg/ml) for N. meningitidis | No. of strains in PCR-RFLP
|
|||||
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| Pens(n = 39): MIC < 0.125 | 39 | |||||
| Peni(n = 36): 0.125 ≤ MIC ≤ 1 | ||||||
| 0.125 | 5a | 1 | 3 | 2 | 1 | |
| 0.19 | 1 | 2 | 1 | |||
| 0.25 | 4 | 1 | 1 | |||
| 0.38 | 3 | 3 | ||||
| 0.5 | 1 | 1 | 1 | |||
| 0.75 | 1 | |||||
| 1b | 2b | |||||
| 1.5 | 1b | |||||
| >32c | 1 | |||||
a
Strains susceptible to amoxicillin (MIC = 0.125 or 0.19 μg/ml).
b
Strains isolated in 1999 and 2000.
c
β-Lactamase-positive strain.