TABLE 1.
Determination of MICs in different isolates of C. neoformans and C. gattii using fenbendazole (FBZ), fluconazole (FCZ), and amphotericin B as antifungalsa
| Isolateb | Origin | MIC (μg/ml) for: |
||
|---|---|---|---|---|
| FBZ | FCZ | AmB | ||
| C. neoformans H99 | Clinical | 0.012 | 2.0 | 0.5 |
| C. neoformans 162 | Clinical | 0.012 | 8.0 | 0.5 |
| C. neoformans 191 | Clinical | 0.012 | 8.0 | 0.25 |
| C. neoformans 186 | Clinical | 0.012 | 4.0 | 0.25 |
| C. neoformans 161 | Clinical | 0.012 | 4.0 | 0.5 |
| C. neoformans 160 | Clinical | 0.012 | 4.0 | 0.5 |
| C. neoformans 139 | Clinical | 0.012 | 4.0 | 0.5 |
| C. neoformans 118 | Clinical | 0.012 | 8.0 | 0.25 |
| C. neoformans 116 | Clinical | 0.012 | 8.0 | 0.5 |
| C. neoformans 115 | Clinical | 0.012 | 4.0 | 0.5 |
| C. neoformans 222 | Clinical | 0.012 | 2.0 | 0.5 |
| C. neoformans 223 | Clinical | 0.012 | 4.0 | 0.5 |
| C. neoformans 218 | Clinical | 0.012 | 2.0 | 0.25 |
| C. gattii R265 | Clinical | 0.012 | 8.0 | 0.5 |
| C. gattii 367 | Environmental | 0.012 | 8.0 | 0.25 |
| C. gattii 368 | Environmental | 0.012 | 16.0 | 0.25 |
| C. gattii 365 | Environmental | 0.012 | 4.0 | 0.5 |
| C. krusei ATCC 6258c | Not applicable | >1.536 | >64 | 0.25 |
| C. parapsilosis ATCC 22019c | Not applicable | >1.536 | 1.0 | 0.25 |
As determined by EUCAST, growth inhibition measurements corresponded to 50% for FLZ and 90% for AmB. FBZ inhibition rates shown in the table correspond to 90%. Identical values were obtained when 50% inhibition rates were determined for FBZ (data not shown).
Strain numbers were attributed by the Collection of Pathogenic Fungi of Fiocruz. For details, see http://cfp.fiocruz.br/index.
The C. krusei and C. parapsilosis isolates were used as controls of antifungal activity as preconized by EUCAST. The MIC results obtained with these isolates were at the expected range (47).