Volume 5, Number 6—December 1999
Synopsis
Antimicrobial Resistance with Streptococcus pneumoniae in the United States, 1997–98
Gary V. Doern
, Angela B. Brueggemann, Holly Huynh, Elizabeth Wingert, and Paul Rhomberg
, Angela B. Brueggemann, Holly Huynh, Elizabeth Wingert, and Paul Rhomberg
Table 2
Characterization of 302 Streptococcus pneumoniae isolates that were erythromycin resistant (MICs 1> µg/ml)
| Erythromycin | No. of | No. with clindamycin MICs of | ||||
|---|---|---|---|---|---|---|
| MIC |
strains |
0.25 |
0.5 |
1 |
2 |
8 |
| 1 | 15 | 15a | 0 | 0 | 0 | 0 |
| 2 | 52 | 51b | 0 | 0 | 0 | 1c |
| 4 | 53 | 53d | 0 | 0 | 0 | 0 |
| 8 | 68 | 68e | 0 | 0 | 0 | 0 |
| 16 | 23 | 22f | 1g | 0 | 0 | 0 |
| 32 | 6 | 5h | 0 | 0 | 0 | 1i |
| 64 | 85 | 0 | 0 | 1j | 1k | 83l |
aFour isolates characterized for ermAM and mefE; all four ermAM-/mefE+.
bSeven isolates characterized; all seven ermAM-/mefE+.
cThis isolate was ermAM+/mefE-.
dSeven isolates characterized; one ermAM-/mefE-; six ermAM-/mefE+.
eSeven isolates characterized; all seven ermAM-/mefE+
fFour isolates characterized; all four ermAM-/mefE+.
gThis isolate was ermAM-/mefE-.
hThree isolates characterized; all ermAM-/mefE+.
iThis isolate was ermAM+/mefE-.
jThis isolate was ermAM-/mefE+.
kThis isolate was ermAM-/mefE-.
lThirty-eight of these isolates were characterized; 26 were ermAM+/mefE-; 12 were ermAM+/mefE+.
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