Modification of Rapid Susceptibility Assay for Antifungal Susceptibility Testing of Aspergillus fumigatus

Modification of rapid susceptibility assay for antifungal susceptibility testing of Aspergillus fumigatus.

To improve objectivity and speed of current antifungal mold susceptibility testing, the yeast Rapid Susceptibility Assay (RSA) was adapted for Aspergillus species. The RSA is based on glucose utilization in the presence of an antifungal drug. Aspergillus fumigatus conidia were incubated in 0.2% glucose RPMI 1640 containing 0.03 to 16 micro g of amphotericin B or itraconazole/ml. Drug-related in...

Colorimetric assay for antifungal susceptibility testing of Aspergillus species.

A colorimetric assay for antifungal susceptibility testing of Aspergillus species (Aspergillus fumigatus, Aspergillus flavus, Aspergillus terreus, Aspergillus nidulans, and Aspergillus ustus) is described based on the reduction of the tetrazolium salt 2,3-bis(2-methoxy-4-nitro-5-[(sulphenylamino)carbonyl]-2H-tetrazolium-hydroxide (XTT) in the presence of menadione as an electron-coupling agent....

Conidial viability assay for rapid susceptibility testing of Aspergillus species.

Antifungal susceptibility testing of filamentous fungi has become more important given the recognition of drug-resistant organisms and the availability of therapies other than amphotericin B (AMB). As current microdilution and E-test methods are limited by a 2 to 3 day incubation time required to obtain results, a more rapid method for susceptibility testing of fungi is needed. We report here a...

Rapid and highly reproducible method for antifungal susceptibility testing of Aspergillus species.

A new method for determining the MICs for Aspergillus species with slant-shaking incubation is described. The method was rapid (24 h), produced sharp visual end points, and showed high reproducibility. Additionally, MICs measured by this method correlated well with, as well as were two- to sixfold lower than, those by a reference method.

Colorimetric Assay for Antifungal Susceptibility