NOTES:
- All beta lactam antibiotics are automatically reported as resistant on an oxacillin (methicillin) resistant staphylococcus species. Speciation of coagulase negative staphylococcus is only performed when specifically requested by the physician.
COMMENTS:
- Penicillin sensitive Streptococcus pneumoniae isolates can be considered sensitive to ampicillin, ampicillin/sulbactam, amoxicillin/clavulanic acid, 1st, 2nd, 3rd, and 4th generation cephalosporins.
- Beta hemolytic Streptococcus species have not demonstrated resistance to penicillin or ampicillin therefore susceptibility testing is not routinely performed. Of the Streptococcus agalactiae performed on isolates recovered from pregnant penicillin allergic women 100% were Penicillin sensitive, 61% were Clindamycin sensitive and 42% were Erythromycin sensitive. Erythromycin resistant strains cannot be reliably interpreted as Clindamycin sensitive without the addition of the "D Test" to test for inducible resistance.
| Beginning in 2007 susceptibility testing will be performed by manual Kirby-Bauer Disk Diffusion Method due to a limitation with the Erythromycin/Streptococcus agalactiae antibiotic/organism combination using the bioMerieux automated identification susceptibility system. |
- Vancomycin resistant Enterococcus species are speciated and the Vancomycin MIC confirmed by alternative methods.
Coagulase Negative Staph
Number of Isolates: 930
| Antibiotic | Percent |
Percent Intermediate |
|---|---|---|
| Ampicillin | • | • |
| Ceftriaxone *Meningitis | N/A | N/A |
| Ceftriaxone *Non-Meningitis | N/A | N/A |
| Clindamycin | 36 | 1 |
| Erythromycin | 32 | 0 |
| Gentamicin | 84 | 6 |
| Levofloxacin | 41 | 20 |
| Linezolid | 100 | |
| Oxacillin | 25 | 0 |
| Penicillin | 5 | 0 |
| Quinupristin/Dalfopr | 100 | |
| Tetracycline | 74 | 0 |
| Trimethoprim/Sulfa | N/A | N/A |
| Vancomycin | 100 |
● = Antibiotic not recommended due to lack of correlation between in vitro results and in vivo activity.
NA = Not Applicable
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Enterococcus Species
Number of Isolates: 301
| Antibiotic | Percent |
Percent Intermediate |
|---|---|---|
| Ampicillin | 91 | 0 |
| Ceftriaxone *Meningitis | N/A | N/A |
| Ceftriaxone *Non-Meningitis | N/A | N/A |
| Clindamycin | • | • |
| Erythromycin | 16 | 16 |
| Gentamicin | • | • |
| Levofloxacin | 45 | 1 |
| Linezolid | 97 | 1 |
| Oxacillin | • | • |
| Penicillin | 91 | 0 |
| Quinupristin/Dalfopr | 17 | 9 |
| Tetracycline | 31 | 0 |
| Trimethoprim/Sulfa | N/A | N/A |
| Vancomycin | 91 | 1 |
● = Antibiotic not recommended due to lack of correlation between in vitro results and in vivo activity.
NA = Not Applicable
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Staphylococcus Aureus
Number of Isolates: 1342
| Antibiotic | Percent |
Percent Intermediate |
|---|---|---|
| Ampicillin | • | • |
| Ceftriaxone *Meningitis | N/A | N/A |
| Ceftriaxone *Non-Meningitis | N/A | N/A |
| Clindamycin | 82 | 1 |
| Erythromycin | 26 | 0 |
| Gentamicin | 98 | 0 |
| Levofloxacin | 63 | 14 |
| Linezolid | 100 | |
| Oxacillin | 30 | 0 |
| Penicillin | 4 | 0 |
| Quinupristin/Dalfopr | 100 | |
| Tetracycline | 94 | 1 |
| Trimethoprim/Sulfa | 99 | 0 |
| Vancomycin | 100 |
● = Antibiotic not recommended due to lack of correlation between in vitro results and in vivo activity.
NA = Not Applicable
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Streptococcus Pneumoniae
Number of Isolates: 47
| Antibiotic | Percent |
Percent Intermediate |
|---|---|---|
| Ampicillin | N/A | N/A |
| Ceftriaxone *Meningitis | 83 | 6 |
| Ceftriaxone *Non-Meningitis | 89 | 1 |
| Clindamycin | N/A | N/A |
| Erythromycin | 36 | 7 |
| Gentamicin | N/A | N/A |
| Levofloxacin | 100 | |
| Linezolid | 100 | |
| Oxacillin | N/A | N/A |
| Penicillin | 43 | 40 |
| Quinupristin/Dalfopr | N/A | N/A |
| Tetracycline | 62 | 2 |
| Trimethoprim/Sulfa | 60 | 10 |
| Vancomycin | 100 |