TABLE 1.
Penicillin and cefotaxime MICs for the isolates analyzed in this study
| Strain | Serotype | Drug to which transformant resistance was selecteda | MIC (mg/liter)
|
Reference | |
|---|---|---|---|---|---|
| Penicillin | Cefotaxime | ||||
| TIGR4b | 4 | 0.032 | 0.047 | 4 | |
| GA71c | 19F | 1.5 | 1.0 | 19 | |
| TIGR19Fa | 19F | Penicillin | 0.125 | 1.0 | This study |
| TIGR19Fb | 19F | Penicillin | 0.125 | 1.0 | This study |
| TIGR19Fc | 19F | Cefotaxime | 0.125 | 1.0 | This study |
| TIGR19Fd | 19F | Penicillin | 0.125 | 1.0 | This study |
| TIGR19Fe | 19F | Cefotaxime | 0.125 | 1.0 | This study |
a
The β-lactam concentration used to select the transformants listed was 0.04 mg/liter for penicillin and 0.1 mg/liter for cefotaxime.
b
Recipient strain in transformation experiments.
c
Donor strain.