The emergence of azole-resistant has become a clinical problem in many parts of the world. Several amino acid mutations in the azole target protein Cyp51Ap contribute to this resistance, with the most concerning being the environmentally derived TR/L98H and TR/Y121F/T289A mutations. Here, we performed passive surveillance to assess a sample of the population in the United States for the presence of these mutations. We found 1.4% of those isolates to exhibit elevated MIC via broth microdilution, and five of those isolates harbored the TR/L98H mutation.
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http://dx.doi.org/10.1128/AAC.02240-17 | DOI Listing |
Int J Antimicrob Agents
February 2017
Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany; German Centre for Infection Research, Partner Site Bonn-Cologne, Cologne, Germany. Electronic address:
Invasive aspergillosis (IA) is a serious hazard to high-risk haematological patients. There are increasing reports of azole-resistant Aspergillus spp. This study assessed the epidemiology of IA and azole-resistant Aspergillus spp.
View Article and Find Full Text PDFAntimicrob Agents Chemother
January 2016
Centro Nacional de Microbiologia, Instituto de Salud Carlos III, Madrid, Spain.
ASP2397 is a new compound with a novel and as-yet-unknown target different from that of licensed antifungal agents. It has activity against Aspergillus and Candida glabrata. We compared its in vitro activity against wild-type and azole-resistant A.
View Article and Find Full Text PDFAntimicrob Agents Chemother
August 2013
Institute for Medical Microbiology and German National Reference Centre for Systemic Mycoses, University Medical Center Göttingen, Göttingen, Germany.
Since the mid-1990s, a steady increase in the occurrence of itraconazole-resistant Aspergillus fumigatus isolates has been observed in clinical contexts, leading to therapeutic failure in the treatment of aspergillosis. This increase has been predominantly linked to a single allele of the cyp51A gene, termed TR/L98H, which is thought to have arisen through the use of agricultural azoles. Here, we investigated the current epidemiology of triazole-resistant A.
View Article and Find Full Text PDFRev Iberoam Micol
January 2013
Servicio de Micología, Centro Nacional de Microbiología, Instituto de Salud Carlos III, Spain.
Background: An allogeneic hematopoietic cell transplantation (allo-HCT) patient presented with chronic pulmonary aspergillosis associated to pulmonary graft versus host disease (GVHD) and was treated for a long time with several antifungal agents that were administered as prophylaxis, combination therapies, and maintenance treatment. The patient suffered from a breakthrough invasive pulmonary aspergillosis due to Aspergillus fumigatus after long-term antifungal therapy.
Material And Methods: Several isolates were analyzed.
Euro Surveill
September 2012
Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Cologne, Germany.
We report the first culture-proven case of invasive aspergillosis (IA) caused by azole-resistant Aspergillus fumigatus in a patient with acute myeloid leukaemia in Germany. IA presented as breakthrough infection under posaconazole prophylaxis. Analysis of the resistance mechanism revealed the TR/L98H mutation in the cyp51A gene, which indicates an environmental origin of the strain.
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