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Indian Journal of Pathology and Microbiology
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Year : 1995  |  Volume : 38  |  Issue : 4  |  Page : 369-74

Disk diffusion susceptibility testing of dermatophytes with imidazoles.


Institute of Microbiology, Madurai Medical College

Correspondence Address:
P V Venugopal
Institute of Microbiology, Madurai Medical College

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Source of Support: None, Conflict of Interest: None


PMID: 9726146

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In vitro susceptibility testing of 43 isolates of dermatophytes was carried out against imidazoles-ketoconazole, miconazole and econazole and griseofulvin by agar dilution and disk diffusion methods. Econazole was the most effective drug inhibiting all the isolates at a concentration of 0.1 microgram ml-1. The MIC 50s and MIC 90s for ketoconazole and miconazole were 1 and 2.5 mg ml-1 whereas the values for griseofulvin were 1 and 5 micrograms ml-1. Good correlation was seen between the MIC and sizes of zones of inhibition around the disks. Regression analysis was used to measure the degree of correlation between the MIC values and matched averaged zones of inhibition and the correlation coefficients for econazole, ketoconazole, miconazole and griseofulvin were -0.5554, -0.5886, -0.8558 and -0.8268 (p < 0.001) respectively.


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