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The susceptibility pattern of penicillin over the 2 periods.
| Period 1 | Period 2 | |||
|---|---|---|---|---|
| Penicillin % | Oral penicillin % | Penicillin nonmeningeal % | Penicillin meningeal % | |
|
| ||||
| Susceptible | 26.3 | 22 | 94.2 | 22.7 |
| Intermediate | 61.8 | 57.6 | 0.8 | 0 |
| Resistant | 6.6 | 7.6 | 1.5 | 68.2 |
| P value | .0001 | .0001 | .0001 | .0001 |
