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Updated: Aug 7, 2026

A Soluble Tetrazolium-Based Reduction Assay to Evaluate the Effect of Antibodies on Candida tropicalis Biofilms
Published on: September 16, 2022
Esterase activity of Candida species isolated from immunocompromised hosts
Chethrapilly Purushothaman Girish Kumar1, Thangam Menon, Thangavel Sundararajan
1Department of Microbiology, Dr. A. L. Mudaliar Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai, India.
Abstract:
A total of 149 clinical isolates of Candida species isolated from immunocompromised patients were examined to ascertain their esterase activity by the Tween 80 opacity test, which is a biochemical test used mainly to differentiate between Candida albicans and Candida dubliniensis. Our results showed that C. albicans (92.3%), Candida tropicalis (92.3%), Candida parapsilosis (25%), C. dubliniensis (16.6%), Candida inconspicua (100%), and Candida lipolytica (100%) produced opacity halos through the 10-day post-inoculation period. The remaining Candida species did not produce a positive test response. These findings indicate that Tween 80 opacity test cannot be used as the sole phenotypic trait in the differentiation of C. albicans and C. dubliniensis.
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