TABLE 2.
Trend in antimicrobial susceptibilities of 143 S. pyogenes and 308 S. agalactiae isolates by year
| Serogroup and antimicrobial | Resistance (intermediate and resistant) rate (%)
|
|||||||
|---|---|---|---|---|---|---|---|---|
| 1990-1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | |
| A | ||||||||
| Tetracycline | 61.1 | 71.4 | 57.1 | 35.0 | 57.1 | 64.3 | 61.9 | 50.0 |
| Chloramphenicol | 16.7 | 0 | 0 | 0 | 0 | 14.3 | 0 | 46.4 |
| Erythromycin | 0 | 14.3 | 23.8 | 15.0 | 21.4 | 21.4 | 19.0 | 14.3 |
| Clindamycin | 0 | 0 | 14.3 | 0 | 14.3 | 21.4 | 14.3 | 10.7 |
| B | ||||||||
| Tetracycline | 96.2 | 100 | 100 | 98.0 | 91.7 | 100 | 91.2 | 97.0 |
| Chloramphenicol | 7.7 | 0 | 0 | 8.0 | 2.1 | 20.0 | 12.3 | 74.6 |
| Erythromycin | 0 | 0 | 0 | 26.0 | 18.7 | 40.0 | 29.8 | 34.6 |
| Clindamycin | 0 | 23.1 | 28.6 | 22.0 | 25.0 | 32.5 | 36.8 | 37.3 |