TABLE 1.
Beta-hemolytic streptococcal isolates included in the study and their ERY and CC susceptibilities and resistance determinantsa
| Group | Total no. of isolates | No. of ERY-resistant isolates | No. of constitutively CC-resistant isolates | No. of constitutively CC-resistant isolates with indicated resistance determinant |
No. of inducibly CC-resistant isolates | No. of inducibly CC-resistant isolates with indicated resistance determinant |
No. of CC-resistant isolates with neither resistance determinant | ||
|---|---|---|---|---|---|---|---|---|---|
| ermTR | ermB | ermTR | ermB | ||||||
| A | 20 | 12 | 2 | 2 | 0 | 10 | 9 | 0 | 1 |
| B | 32 | 32 | 16 | 8 | 8 | 16 | 13 | 0 | 0 |
| C | 15 | 1 | 0 | NA | NA | 1 | 1 | 0 | 0 |
| F | 10 | 0 | 0 | NA | NA | 0 | NA | NA | NA |
| G | 23 | 21 | 2 | 2 | 0 | 19 | 16 | 1 | 3 |
a
NA, not applicable.