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Journal of Clinical Microbiology, April 1998, p. 926-930, Vol. 36, No. 4
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Comparative Evaluation of FUNGITEST and Broth Microdilution
Methods for Antifungal Drug Susceptibility Testing of
Candida Species and Cryptococcus neoformans
Kate G.
Davey,
Ann D.
Holmes,
Elizabeth M.
Johnson,
Adrien
Szekely, and
David W.
Warnock*
Mycology Reference Laboratory, Public Health
Laboratory Service, Bristol, United Kingdom
Received 28 October 1997/Returned for modification 1 December
1997/Accepted 8 January 1998
The FUNGITEST method (Sanofi Diagnostics Pasteur, Paris, France) is
a microplate-based procedure for the breakpoint testing of six
antifungal agents (amphotericin B, flucytosine, fluconazole, itraconazole, ketoconazole, and miconazole). We compared the FUNGITEST method with a broth microdilution test, performed according to National
Committee for Clinical Laboratory Standards document M27-A guidelines,
for determining the in vitro susceptibilities of 180 isolates of
Candida spp. (50 C. albicans, 50 C. glabrata, 10 C. kefyr, 20 C. krusei, 10 C. lusitaniae, 20 C. parapsilosis, and 20 C. tropicalis
isolates) and 20 isolates of Cryptococcus neoformans.
Overall, there was 100% agreement between the methods for amphotericin
B, 95% agreement for flucytosine, 84% agreement for miconazole, 83%
agreement for itraconazole, 77% agreement for ketoconazole, and 76%
agreement for fluconazole. The overall agreement between the methods
exceeded 80% for all species tested with the exception of
C. glabrata (71% agreement). The poorest agreement
between the results for individual agents was seen with C. glabrata (38% for fluconazole, 44% for ketoconazole, and 56% for itraconazole) and C. tropicalis (50% for
miconazole). The FUNGITEST method misclassified as susceptible 2 of
12 (16.6%) fluconazole-resistant isolates, 2 of 10 (20%)
itraconazole-resistant isolates, and 4 of 8 (50%)
ketoconazole-resistant isolates of several Candida spp.
Further development of the FUNGITEST procedure will be required
before it can be recommended as an alternative method for the
susceptibility testing of Candida spp. or C. neoformans.
*
Corresponding author. Mailing address: Mycology
Reference Laboratory, Public Health Laboratory, Kingsdown, Bristol BS2
8EL, United Kingdom. Phone: (44) 117-928-5030. Fax: (44) 117-922-6611. E-mail: D.W.Warnock{at}PHLSBristol.btinternet.com.
Journal of Clinical Microbiology, April 1998, p. 926-930, Vol. 36, No. 4
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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