Current studentsExisting staffContact us
 

Cryptococcus neoformans-Cryptococcus gattii Species Complex: an International Study of Wild-Type Susceptibility Endpoint Distributions and Epidemiological Cutoff Values for Amphotericin B and Flucytosine

Simple item page
dc.contributor.authorEspinel-Ingroff, A.
dc.contributor.authorChowdhary, A.
dc.contributor.authorCuenca-Estrella, M.
dc.contributor.authorFothergill, A.
dc.contributor.authorFuller, J.
dc.contributor.authorHagen, F.
dc.contributor.authorGovender, N.
dc.contributor.authorGuarro, J.
dc.contributor.authorJohnson, E.
dc.contributor.authorLass-Florl, C.
dc.contributor.authorLockhart, S.
dc.contributor.authorMartins, M.
dc.contributor.authorMeis, J.
dc.contributor.authorMelhem, M.
dc.contributor.authorOstrosky-Zeichner, L.
dc.contributor.authorPelaez, T.
dc.contributor.authorPfaller, M.
dc.contributor.authorSchell, W.
dc.contributor.authorTrilles, L.
dc.contributor.authorKidd, S.
dc.contributor.authoret al.
dc.date.issued2012
dc.description.abstractClinical breakpoints (CBPs) are not available for the Cryptococcus neoformans-Cryptococcus gattii species complex. MIC distributions were constructed for the wild type (WT) to establish epidemiologic cutoff values (ECVs) for C. neoformans and C. gattii versus amphotericin B and flucytosine. A total of 3,590 amphotericin B and 3,045 flucytosine CLSI MICs for C. neoformans (including 1,002 VNI isolates and 8 to 39 VNII, VNIII, and VNIV isolates) and 985 and 853 MICs for C. gattii, respectively (including 42 to 259 VGI, VGII, VGIII, and VGIV isolates), were gathered in 9 to 16 (amphotericin B) and 8 to 13 (flucytosine) laboratories (Europe, United States, Australia, Brazil, Canada, India, and South Africa) and aggregated for the analyses. Additionally, 442 amphotericin B and 313 flucytosine MICs measured by using CLSI-YNB medium instead of CLSI-RPMI medium and 237 Etest amphotericin B MICs for C. neoformans were evaluated. CLSI-RPMI ECVs for distributions originating in ≥3 laboratories (with the percentages of isolates for which MICs were less than or equal to ECVs given in parentheses) were as follows: for amphotericin B, 0.5 μg/ml for C. neoformans VNI (97.2%) and C. gattii VGI and VGIIa (99.2 and 97.5%, respectively) and 1 μg/ml for C. neoformans (98.5%) and C. gattii nontyped (100%) and VGII (99.2%) isolates; for flucytosine, 4 μg/ml for C. gattii nontyped (96.4%) and VGI (95.7%) isolates, 8 μg/ml for VNI (96.6%) isolates, and 16 μg/ml for C. neoformans nontyped (98.6%) and C. gattii VGII (97.1%) isolates. Other molecular types had apparent variations in MIC distributions, but the number of laboratories contributing data was too low to allow us to ascertain that the differences were due to factors other than assay variation. ECVs may aid in the detection of isolates with acquired resistance mechanisms.
dc.description.statementofresponsibilityA. Espinel-Ingroff... J. Turnidge... et al.
dc.identifier.citationAntimicrobial Agents and Chemotherapy, 2012; 56(6):3107-3113
dc.identifier.doi10.1128/AAC.06252-11
dc.identifier.issn0066-4804
dc.identifier.issn1098-6596
dc.identifier.orcidKidd, S. [0000-0002-5957-4178]
dc.identifier.orcidTurnidge, J. [0000-0003-4240-5578]
dc.identifier.urihttp://hdl.handle.net/2440/73186
dc.language.isoen
dc.publisherAmer Soc Microbiology
dc.rightsCopyright © 2012, American Society for Microbiology.
dc.source.urihttps://doi.org/10.1128/aac.06252-11
dc.subjectCryptococcus neoformans
dc.subjectAmphotericin B
dc.subjectFlucytosine
dc.subjectAnti-Bacterial Agents
dc.subjectMicrobial Sensitivity Tests
dc.subjectCryptococcus gattii
dc.titleCryptococcus neoformans-Cryptococcus gattii Species Complex: an International Study of Wild-Type Susceptibility Endpoint Distributions and Epidemiological Cutoff Values for Amphotericin B and Flucytosine
dc.typeJournal article
pubs.publication-statusPublished

Files

Collections

Medicine publications