Table 5.
Distribution of beta-lactamase positive ampicillin-resistant Haemophilus parainfluenzae isolates in patients with sarcoidosis
| Biotype | Nasopharynx | Sputum | ||
|---|---|---|---|---|
| Resistance profile (No. of isolates) | MICAm (μg/ml) | Resistance profile (No. of isolates) | MICAm (μg/ml) | |
| I | Am (1) | 24 | AmTe (1) | 4 |
| AmSxt (1) | >256 | AmTe (1) | 48 | |
| AmCtxCazSxt (1) | 8 | |||
| AmTeSxt (1) | 128 | |||
| III | AmCtxCazTeSxt (1) | 6 | ||
| AmTeSxt (1) | 6 | |||
Abbreviations: Am ampicillin, Caz ceftazidime, Ctx cefotaxime, Te tetracycline, Sxt trimethoprim/sulfametoxazole
Ampicillin breakpoints used for interpretation of minimal inhibitory concentration (MICAm): susceptible ≤1 μg/ml, intermediate = 2 μg/ml and resistant ≥ 4 μg/ml, according to [25]