z-logo
Premium
In vitro susceptibilities of cerebrospinal fluid isolates of Cryptococcus neoformans collected during a ten‐year period against fluconazole, voriconazole and posaconazole (SCH56592)
Author(s) -
Yildiran S. T.,
Fothergill A. W.,
Sutton D. A.,
Rinaldi M. G.
Publication year - 2002
Publication title -
mycoses
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 69
eISSN - 1439-0507
pISSN - 0933-7407
DOI - 10.1046/j.1439-0507.2002.00765.x
Subject(s) - posaconazole , voriconazole , fluconazole , cryptococcus neoformans , triazole , cerebrospinal fluid , medicine , cryptococcosis , antifungal , microbiology and biotechnology , biology , chemistry , organic chemistry
Summary. We investigated the in vitro susceptibilities of 213 cerebrospinal fluid isolates of Cryptococcus neoformans isolated from 192 patients through a 10‐year period, 1990–99, against fluconazole, voriconazole and posaconazole (SCH56592) by using the NCCLS (National Committee for Clinical Laboratory Standards) macrodilution method, M27‐A. The overall MICs 50 and MICs 90 of fluconazole, voriconazole and posaconazole were found to be 2 and 8 µg ml −1 , ≤0.125 µg ml −1 (both), and ≤0.015 and 0.06 µg ml −1 , respectively. The MIC ranges, MICs 50 , and MICs 90 of three triazoles were also determined according to the defined year category (1990–94, 1995, 1996, 1997 and 1998–99). The MICs 50 and MICs 90 of each triazole remained almost unchanged and did not exhibit any sign of an upward shift during a decade (1990–99). However, a tendency for development of possible cross‐resistance between the three triazoles was observed only in 1996. Meanwhile, the individual relapsing isolates (n:21) from 20 patients exhibited same, higher or, suprisingly, lower MICs, particularly against fluconazole and posaconazole. Zusammenfassung. Wir haben die In Vitro ‐ Empfindlichkeit von 213 Cryptococcus neoformans ‐Liquorisolaten von 192 Patienten der Zehnjahresperiode 1990–99, für Fluconazol, Voriconazol und Posaconazol (SCH56592) mit der NCCLS‐Makrodilutionsmethode M27‐A AB untersucht. Die MICs 50 und MICs 90 für Fluconazol, Voriconazol und Posaconazol wurden zu 2 und 8 µg ml −1 , 0.125 µg ml −1 (beide), und ≤0.015 und 0.06 µg ml −1 bestimmt. Die MICs 50 und MICs 90 der drei Triazole wurden auch gesondert in den Jahreskategorien 1990–94, 1995, 1996, 1997, 1998–99 bestimmt. Die Werte der drei Triazole sind während dieses Jahrzehnts (1990–99) fast unverändert geblieben Eine Tendenz zur Entwicklung möglicher Kreuzresistenzen zwischen den drei Triazolen wurde nur 1996 beobachtet. 21 Isolate von 20 Rückfallpatienten zeigen gleiche, höhere oder auch niedrigere MICs, besonders gegen Fluconazol und Posaconazol.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here