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Can J Microbiol. 1999 Oct;45(10):871-4.

Use of spectrophotometric reading for in vitro antifungal susceptibility testing of Aspergillus spp.

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Laboratoire de Parasitologie, Mycologie Médicale et Pathologie Exotique, Université Claude Bernard Lyon I, France.


A comparative study of visual and spectrophotometric MIC endpoint determinations for antifungal susceptibility testing of Aspergillus species was performed. A broth microdilution method adapted from the National Committee for Clinical Laboratory Standards (NCCLS) was used for susceptibility testing of 180 clinical isolates of Aspergillus species against amphotericin B and itraconazole. MICs were determined visually and spectrophotometrically at 490 nm after 24, 48, and 72 h of incubation, and MIC pairs were compared. The agreement between the two methods was 99% for amphotericin B and ranged from 95 to 98% for itraconazole. It is concluded that spectrophotometric MIC endpoint determination is a valuable alternative to the visual reference method for susceptibility testing of Aspergillus species.

[Indexed for MEDLINE]

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