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Klotz U, Schmidt D, Willinger B, Steinmann E, Buer J, Rath PM, Steinmann J. Echinocandin resistance and population structure of invasive Candida glabrata isolates from two university hospitals in Germany and Austria. Mycoses 2016; 59:312-8. [PMID: 26806376 DOI: 10.1111/myc.12472] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 12/17/2015] [Accepted: 12/18/2015] [Indexed: 11/30/2022]
Abstract
Echinocandin resistance in Candida glabrata is emerging and is associated with the presence of FKS mutations. In this study, we analysed the antifungal susceptibility, presence of FKS mutations and clonality of C. glabrata blood culture isolates from two hospitals in Germany and Austria. Susceptibility testing of 64 C. glabrata bloodstream isolates from two university hospitals was performed with broth microdilution method according to EUCAST. In addition, all isolates were screened for FKS mutations. Molecular fingerprinting was performed by microsatellite PCR with three separate primer pairs and semiautomated repetitive sequenced-based PCR (rep-PCR). One C. glabrata isolate from Germany (1.5%) was echinocandin resistant, with a corresponding mutation in FKS2 gene hot spot 1. The discriminatory power of microsatellite PCR was higher than that of rep-PCR (Simpson Index of 0.94 vs. 0.88); microsatellite PCR created 31 separate genotypes, whereas rep-PCR created 17. Predominant genotypes or clusters of isolates from Germany and Austria were present, with no epidemiological evidence of nosocomial transmissions. Although we found a low incidence of echinocandin resistance in C. glabrata in our settings, further surveillance projects in central Europe are warranted for monitoring future epidemiological trends. The genetic population structure of C. glabrata demonstrates overrepresented geographical clusters.
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Affiliation(s)
- Ulrike Klotz
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Dirk Schmidt
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Birgit Willinger
- Division of Clinical Microbiology, Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
| | - Eike Steinmann
- Institute of Experimental Virology, Twincore Centre for Experimental and Clinical Infection Research, Hannover, Germany
| | - Jan Buer
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Peter-Michael Rath
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Joerg Steinmann
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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Posttreatment Antifungal Resistance among Colonizing Candida Isolates in Candidemia Patients: Results from a Systematic Multicenter Study. Antimicrob Agents Chemother 2015; 60:1500-8. [PMID: 26711776 DOI: 10.1128/aac.01763-15] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 12/09/2015] [Indexed: 12/16/2022] Open
Abstract
The prevalence of intrinsic and acquired resistance among colonizing Candida isolates from patients after candidemia was investigated systematically in a 1-year nationwide study. Patients were treated at the discretion of the treating physician. Oral swabs were obtained after treatment. Species distributions and MIC data were investigated for blood and posttreatment oral isolates from patients exposed to either azoles or echinocandins for <7 or ≥ 7 days. Species identification was confirmed using matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) and internal transcribed spacer (ITS) sequencing, susceptibility was examined by EUCAST EDef 7.2 methodology, echinocandin resistance was examined by FKS sequencing, and genetic relatedness was examined by multilocus sequence typing (MLST). One hundred ninety-three episodes provided 205 blood and 220 oral isolates. MLST analysis demonstrated a genetic relationship for 90% of all paired blood and oral isolates. Patients exposed to azoles for ≥ 7 days (n = 93) had a significantly larger proportion of species intrinsically less susceptible to azoles (particularly Candida glabrata) among oral isolates than among initial blood isolates (36.6% versus 12.9%; P < 0.001). A similar shift toward species less susceptible to echinocandins among 85 patients exposed to echinocandins for ≥ 7 days was not observed (4.8% of oral isolates versus 3.2% of blood isolates; P > 0.5). Acquired resistance in Candida albicans was rare (<5%). However, acquired resistance to fluconazole (29.4%; P < 0.05) and anidulafungin (21.6%; P < 0.05) was common in C. glabrata isolates from patients exposed to either azoles or echinocandins. Our findings suggest that the colonizing mucosal microbiota may be an unrecognized reservoir of resistant Candida species, especially C. glabrata, following treatment for candidemia. The resistance rates were high, raising concern in general for patients exposed to antifungal drugs.
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Initial antifungal strategy does not correlate with mortality in patients with candidemia. Eur J Clin Microbiol Infect Dis 2015; 35:187-93. [PMID: 26634352 DOI: 10.1007/s10096-015-2527-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Accepted: 11/08/2015] [Indexed: 02/04/2023]
Abstract
The incidence of Candida bloodstream infections (BSIs) has increased over time, especially in medical wards. The objective of this study was to evaluate the impact of different antifungal treatment strategies on 30-day mortality in patients with Candida BSI not admitted to intensive care units (ICUs) at disease onset. This prospective, monocentric, cohort study was conducted at an 1100-bed university hospital in Rome, Italy, where an infectious disease consultation team was implemented. All cases of Candida BSIs observed in adult patients from November 2012 to April 2014 were included. Patients were grouped according to the initial antifungal strategy: fluconazole, echinocandin, or liposomal amphotericin B. Cox regression analysis was used to identify risk factors significantly associated with 15-day and 30-day mortality. During the study period, 130 patients with candidemia were observed (58 % with C. albicans, 7 % with C. glabrata, and 23 % with C. parapsilosis). The first antifungal drug was fluconazole for 40 % of patients, echinocandin for 57.0 %, and liposomal amphotericin B for 4 %. During follow-up, 33 % of patients died. The cumulative mortality 30 days after the candidemia episode was 30.8 % and was similar among groups. In the Cox regression analysis, clinical presentation was the only independent factor associated with 15-day mortality, and Acute Physiology and Chronic Health Evaluation (APACHE) II score and clinical presentation were the independent factors associated with 30-day mortality. No differences in 15-day and 30-day mortality were observed between patients with and without C. albicans candidemia. In patients with candidemia admitted to medical or surgical wards, clinical severity but not the initial antifungal strategy were significantly correlated with mortality.
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Busca A, Tortorano AM, Pagano L. Reviewing the importance and evolution of fungal infections and potential antifungal resistance in haematological patients. J Glob Antimicrob Resist 2015; 3:237-241. [DOI: 10.1016/j.jgar.2015.09.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 09/09/2015] [Accepted: 09/11/2015] [Indexed: 12/11/2022] Open
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Epidemiology, clinical characteristics, and outcome of candidemia in a tertiary referral center in Italy from 2010 to 2014. Infection 2015; 44:205-13. [DOI: 10.1007/s15010-015-0845-z] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 09/15/2015] [Indexed: 12/26/2022]
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Abstract
Fungal infections due to Candida and Aspergillus species cause extensive morbidity and mortality, especially among immunosuppressed patients, and antifungal therapy is critical to patient management. Yet only a few drug classes are available to treat invasive fungal diseases, and this problem is compounded by the emergence of antifungal resistance. Echinocandin drugs are the preferred choice to treat candidiasis. They are the first cell wall-active agents and target the fungal-specific enzyme glucan synthase, which catalyzes the biosynthesis of β-1,3-glucan, a key cell wall polymer. Therapeutic failures occur rarely among common Candida species, with the exception of Candida glabrata, which is frequently multidrug resistant. Echinocandin resistance in susceptible species is always acquired during therapy. The mechanism of resistance involves amino acid changes in hot-spot regions of Fks subunits of glucan synthase, which decrease the sensitivity of the enzyme to drug. Cellular stress response pathways lead to drug adaptation, which promotes the formation of resistant fks strains. Clinical factors promoting echinocandin resistance include empiric therapy, prophylaxis, gastrointestinal reservoirs, and intra-abdominal infections. A better understanding of the echinocandin-resistance mechanism, along with cellular and clinical factors promoting resistance, will facilitate more effective strategies to overcome and prevent echinocandin resistance.
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Affiliation(s)
- David S Perlin
- New Jersey Medical School, Rutgers Biomedical and Health Sciences, Public Health Research Institute, Newark, New Jersey
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Martínez-Jiménez MC, Muñoz P, Valerio M, Vena A, Guinea J, Bouza E. Combination of Candida biomarkers in patients receiving empirical antifungal therapy in a Spanish tertiary hospital: a potential role in reducing the duration of treatment. J Antimicrob Chemother 2015; 70:3107-15. [PMID: 26311840 DOI: 10.1093/jac/dkv241] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 07/13/2015] [Indexed: 01/07/2023] Open
Abstract
OBJECTIVES Initiation of empirical antifungal therapy for invasive candidiasis (IC) is usually based on clinical suspicion. Serological biomarkers have not yet been studied as a means of ruling out IC. We evaluated the potential role of two combined biomarkers in stopping unnecessary antifungals in patients at risk of IC in the ICU and in other wards. METHODS This was a prospective observational study including adults starting empirical antifungal treatment for suspected IC, at Gregorio Marañón Hospital, Madrid (Spain). Patients were stratified according to admission department (ICU or other wards) and final diagnosis (no IC or proven or probable IC). Type of candidiasis (candidaemia or deep-seated candidiasis) was also considered. The Candida albicans germ tube antibody (CAGTA) test and the β-d-glucan (BDG) test were performed on serum samples collected by venepuncture on days 0, 3 and 5 after starting empirical antifungal therapy. RESULTS Sixty-three ICU patients and 37 non-ICU patients were included. High-risk gastrointestinal surgery and sepsis in non-surgical patients were the main indications for empirical treatment (30% each). Patients had no IC (58%), proven IC (30%) or probable IC (12%). Overall, sensitivity and negative predictive value of the combination of both the CAGTA test and the BDG test were 97% for the entire population. The best performance was observed in ICU patients (sensitivity and negative predictive value of 100%). Among patients without IC, all biomarkers were negative in 31 patients. CONCLUSIONS Serial determination of CAGTA/BDG during empirical antifungal therapy has a high sensitivity and negative predictive value. If properly confirmed, this strategy could be used to discontinue antifungal treatment in at least 31% of patients as a complementary tool in antifungal stewardship programmes.
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Affiliation(s)
- M Carmen Martínez-Jiménez
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain
| | - Patricia Muñoz
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain CIBER Enfermedades Respiratorias-CIBERES (CB06/06/0058), Madrid, Spain Medicine Department, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
| | - Maricela Valerio
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain
| | - Antonio Vena
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain
| | - Jesús Guinea
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain CIBER Enfermedades Respiratorias-CIBERES (CB06/06/0058), Madrid, Spain
| | - Emilio Bouza
- Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain Instituto de Investigación Sanitaria del Hospital Gregorio Marañón, Madrid, Spain CIBER Enfermedades Respiratorias-CIBERES (CB06/06/0058), Madrid, Spain Medicine Department, School of Medicine, Universidad Complutense de Madrid, Madrid, Spain
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58
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Iatta R, Immediato D, Puttilli MR, Danesi P, Passantino G, Parisi A, Mallia E, Otranto D, Cafarchia C. Cryptococcus neoformans in the respiratory tract of squirrels, Callosciurus finlaysonii (Rodentia, Sciuridae). Med Mycol 2015; 53:666-73. [PMID: 26229151 DOI: 10.1093/mmy/myv045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 05/14/2015] [Indexed: 11/13/2022] Open
Abstract
Cryptococcosis is a fungal disease acquired from the environment, for which animals may serve as sentinels for human exposure. The occurrence of Cryptococcus spp. in the respiratory tract of 125 squirrels, Callosciurus finlaysonii, trapped in Southern Italy, was assessed. Upon examination of nasal swabs and lung tissue from each individual, a total of 13 (10.4%) animals scored positive for yeasts, 7 for Cryptococcus neoformans (C.n.) (5.6%) and 6 for other yeasts (4.8%). C.n. was isolated from the nostrils and lungs, with a high population size in nostrils. Two C.n. molecular types, VNI and VNIV, were identified, with C.n. var. grubii VNI the most prevalent. Phylogenetic analyses of ITS+ and URA5 sequences revealed that C.n. isolates were genetically similar to isolates from a range of geographical areas and hosts. Results suggest that C.n. can colonize or infect the respiratory tract of C. finlaysonii. The high occurrence and level of colonization of nasal cavities might be an indicator of environmental exposure to high levels of airborne microorganism. The close phylogenetic relationship of C.n. strains from squirrels with those from human and other animal hosts suggests a potential role for these animals as "sentinels" for human exposure.
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Affiliation(s)
- Roberta Iatta
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Italy
| | - Davide Immediato
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Italy
| | | | - Patrizia Danesi
- Istituto zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | | | - Antonio Parisi
- Experimental Zooprophylactic Institute of Apulia and Basilicata, Bari, Italy
| | - Egidio Mallia
- Parco Regionale Gallipoli Cognato e Piccole Dolomiti Lucane, Basilicata, Matera, Italy
| | - Domenico Otranto
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Italy
| | - Claudia Cafarchia
- Dipartimento di Medicina Veterinaria, Università degli Studi di Bari, Italy
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Abstract
PURPOSE OF REVIEW Echinocandin resistance in Candida is a great concern, as the echinocandin drugs are recommended as first-line therapy for patients with invasive candidiasis. Here, we review recent advances in our understanding of the epidemiology, underlying mechanisms, methods for detection and clinical implications. RECENT FINDINGS Echinocandin resistance has emerged over the recent years. It has been found in most clinically relevant Candida spp., but is most common in C. glabrata with rates exceeding 10% at selected institutions. It is most commonly detected after 3-4 weeks of treatment and is associated with a dismal outcome. An extensive list of mutations in hot spot regions of the genes encoding the target has been characterized and associated with species and drug-specific loss of susceptibility. The updated antifungal susceptibility testing reference methods identify echinocandin-resistant isolates reliably, although the performance of commercial tests is somewhat more variable. Alternative technologies are being developed, including molecular detection and matrix-assisted laser desorption ionization-time of flight. SUMMARY Echinocandin resistance is increasingly encountered and its occurrence makes susceptibility testing essential, particularly in patients with prior exposure. The further development of rapid and user-friendly commercially available susceptibility platforms is warranted. Antifungal stewardship is important in order to minimize unnecessary selection pressure.
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60
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Alp S, Arikan-Akdagli S, Gulmez D, Ascioglu S, Uzun O, Akova M. Epidemiology of candidaemia in a tertiary care university hospital: 10-year experience with 381 candidaemia episodes between 2001 and 2010. Mycoses 2015; 58:498-505. [DOI: 10.1111/myc.12349] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/06/2015] [Accepted: 03/26/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Sehnaz Alp
- Faculty of Medicine; Department of Infectious Diseases and Clinical Microbiology; Hacettepe University; Ankara Turkey
| | - Sevtap Arikan-Akdagli
- Faculty of Medicine; Department of Medical Microbiology; Hacettepe University; Ankara Turkey
| | - Dolunay Gulmez
- Faculty of Medicine; Department of Medical Microbiology; Hacettepe University; Ankara Turkey
| | - Sibel Ascioglu
- Faculty of Medicine; Department of Infectious Diseases and Clinical Microbiology; Hacettepe University; Ankara Turkey
| | - Omrum Uzun
- Faculty of Medicine; Department of Infectious Diseases and Clinical Microbiology; Hacettepe University; Ankara Turkey
| | - Murat Akova
- Faculty of Medicine; Department of Infectious Diseases and Clinical Microbiology; Hacettepe University; Ankara Turkey
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61
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Tan BH, Chakrabarti A, Li RY, Patel AK, Watcharananan SP, Liu Z, Chindamporn A, Tan AL, Sun PL, Wu UI, Chen YC. Incidence and species distribution of candidaemia in Asia: a laboratory-based surveillance study. Clin Microbiol Infect 2015; 21:946-53. [PMID: 26100373 DOI: 10.1016/j.cmi.2015.06.010] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 06/04/2015] [Accepted: 06/06/2015] [Indexed: 11/19/2022]
Abstract
The epidemiology of candidaemia varies between hospitals and geographic regions. Although there are many studies from Asia, a large-scale cross-sectional study across Asia has not been performed. We conducted a 12-month, laboratory-based surveillance of candidaemia at 25 hospitals from China, Hong Kong, India, Singapore, Taiwan and Thailand. The incidence and species distribution of candidaemia were determined. There were 1601 episodes of candidaemia among 1.2 million discharges. The overall incidence was 1.22 episodes per 1000 discharges and varied among the hospitals (range 0.16-4.53 per 1000 discharges) and countries (range 0.25-2.93 per 1000 discharges). The number of Candida blood isolates and the total number of fungal isolates were highly correlated among the six countries (R² = 0.87) and 25 hospitals (R² = 0.77). There was a moderate correlation between incidence of candidaemia and the intensive care unit (ICU)/total bed ratio (R² = 0.47), although ICUs contributed to only 23% of candidaemia cases. Of 1910 blood isolates evaluated, Candida albicans was most frequently isolated (41.3%), followed by Candida tropicalis (25.4%), Candida glabrata (13.9%) and Candida parapsilosis (12.1%). The proportion of C. tropicalis among blood isolates was higher in haemato-oncology wards than others wards (33.7% versus 24.5%, p 0.0058) and was more likely to be isolated from tropical countries than other Asian countries (46.2% versus 18.9%, p 0.04). In conclusion, the ICU settings contribute, at least in part, to the incidence variation among hospitals. The species distribution is different from Western countries. Both geographic and healthcare factors contribute to the variation of species distribution.
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Affiliation(s)
- B H Tan
- Department of Infectious Diseases, Singapore General Hospital, Singapore
| | - A Chakrabarti
- Department of Medical Microbiology, Postgraduate Institute of Medical Education & Research (PGIMER), Chandigarh, India
| | - R Y Li
- Department of Dermatology, Peking University First Hospital, Research Centre for Medical Mycology, Peking University, Beijing, China
| | - A K Patel
- Department of Infectious Diseases, Sterling Hospital, Ahmedabad, India
| | - S P Watcharananan
- )Division of Infectious Disease, Department of Medicine, Faculty of Medicine, Ramathibodi Hospital, Bangkok, Thailand
| | - Z Liu
- )Department of Infectious Diseases, Peking Union Medical College Hospital, Beijing, China
| | - A Chindamporn
- )Department of Microbiology, Faculty of Medicine, King Chulalongkorn Memorial Hospital Chulalongkorn University, Bangkok, Thailand
| | - A L Tan
- )Department of Pathology, Singapore General Hospital, Singapore
| | - P-L Sun
- )Department of Dermatology, Mackay Memorial Hospital, Taipei, Taiwan
| | - U-I Wu
- )Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Y-C Chen
- )Department of Medicine, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan; )National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan.
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Bassetti M, Merelli M, Ansaldi F, de Florentiis D, Sartor A, Scarparo C, Callegari A, Righi E. Clinical and therapeutic aspects of candidemia: a five year single centre study. PLoS One 2015; 10:e0127534. [PMID: 26010361 PMCID: PMC4444310 DOI: 10.1371/journal.pone.0127534] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 04/16/2015] [Indexed: 11/18/2022] Open
Abstract
Background Candida is an important cause of bloodstream infections (BSI) in nosocomial settings causing significant mortality and morbidity. This study was performed to evaluate contemporary epidemiology, species distribution, antifungal susceptibility and outcome of candida BSI in an Italian hospital. Methods All consecutive patients who developed candidemia at Santa Maria della Misericordia University Hospital (Italy) between January 2009 and June 2014 were enrolled in the study. Results A total of 204 episodes of candidemia were identified during the study period with an incidence of 0.79 episodes/1000 admissions. C. albicans was isolated in 60.3% of cases, followed by C. parapsilosis (16.7%), C. glabrata (11.8%) and C. tropicalis (6.4%). Of all Candida BSI, 124 (60.8 %) occurred in patients admitted to IMW, 31/204 (15.2 %) in ICUs, 33/204 (16.2%) in surgical units and 16/204 (7.8%) in Hematology/Oncology wards. Overall, 47% of patients died within 30 days from the onset of candidemia. C. parapsilosis and C. glabrata candidemia were associated with the lowest mortality rate (36%), while patients with C. tropicalis BSI had the highest mortality rate (58.3%). Lower mortality rates were detected in patients receiving therapy within 48 hours from the time of execution of the blood cultures (57,1% vs 38,9%, P <0.05). At multivariate analysis, steroids treatment (OR= 0.27, p=0.005) and CVC removal (OR=3.77, p=0.014) were independently associated with lower and higher survival probability, respectively. Candidemia in patients with peripherally inserted central catheters (PICC) showed to be associated with higher mortality in comparison with central venous catheters (CVC, Short catheters and Portacath) and no CVC use. For each point increase of APACHE III score, survival probability decreased of 2%. Caspofungin (OR=3.45, p=0.015) and Amphothericin B lipid formulation (OR=15.26, p=0.033) were independently associated with higher survival probability compared with no treatment.
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Affiliation(s)
- Matteo Bassetti
- Infectious Diseases Division, Santa Maria Misericordia University Hospital, Udine, Italy
- * E-mail:
| | - Maria Merelli
- Infectious Diseases Division, Santa Maria Misericordia University Hospital, Udine, Italy
| | - Filippo Ansaldi
- IRCCS San Martino IST, Department of Health Sciences, University of Genoa; Genoa, Italy
| | | | - Assunta Sartor
- Microbiology Unit, Santa Maria Misericordia University Hospital, Udine, Italy
| | - Claudio Scarparo
- Microbiology Unit, Santa Maria Misericordia University Hospital, Udine, Italy
| | - Astrid Callegari
- Infectious Diseases Division, Santa Maria Misericordia University Hospital, Udine, Italy
| | - Elda Righi
- Infectious Diseases Division, Santa Maria Misericordia University Hospital, Udine, Italy
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Montagna MT, Lovero G, Coretti C, Martinelli D, De Giglio O, Iatta R, Balbino S, Rosato A, Caggiano G. Susceptibility to echinocandins of Candida spp. strains isolated in Italy assessed by European Committee for Antimicrobial Susceptibility Testing and Clinical Laboratory Standards Institute broth microdilution methods. BMC Microbiol 2015; 15:106. [PMID: 25990252 PMCID: PMC4437500 DOI: 10.1186/s12866-015-0442-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 05/11/2015] [Indexed: 12/14/2022] Open
Abstract
Background The echinocandins are recommended as first-line therapy for Candida species infections, but drug resistance, especially among Candida glabrata, is becoming more frequent. We investigated the antifungal susceptibility of anidulafungin, caspofungin, and micafungin against 584 isolates of Candida spp. (bloodstream, other sterile sites) collected from patients admitted to an Italian university hospital between 2000 and 2013. The susceptibility was evaluated using the broth microdilution method according to both the European Committee for Antimicrobial Susceptibility Testing (EUCAST EDef 7.2) and the Clinical Laboratory Standards Institute (CLSI M27-A3). The echinocandin susceptibilities were assessed on the basis of the species-specific clinical breakpoints proposed by the EUCAST version 6.1 and CLSI M27-S4 documents. The two methods were comparable by assessing essential agreement (EA), categorical agreement (CA), and Spearman’s correlation analysis (rho, r). Results The modal minimum inhibitory concentrations (MICs; μg ⋅ mL −1) values by both methods (EUCAST/CLSI) for anidulafungin, caspofungin, and micafungin for each species were, respectively, as follows: C. albicans, 0.03/0.12, 0.016/0.5, and 0.016/0.008; C. parapsilosis complex, 2/1, 2/2, and 2/1; C. tropicalis, 0.06/0.12, 0.06/0.12, and 0.06/0.12; C. glabrata complex, 0.03/0.25, 0.06/0.12, and 0.03/0.06; C. guilliermondii, 2/1, 2/2, and 2/2; and C. krusei, 0.06/0.12, 0.12/0.5, and 0.06/0.12. The overall resistance rates for EUCAST/CLSI were as follows: anidulafungin, 2.5/0.9 %; caspofungin, breakpoint not available/3.8 %; micafungin, 2.7/1.5 %. Candida glabrata complex was the least susceptible to all three echinocandins, and the percentages of resistant isolates by EUCAST/CLSI were as follows: anidulafungin, 13.5/2.7 %; caspofungin, breakpoint not available/16.2 %; micafungin, 18.9/13.5 %. The overall EA was 93 % for micafungin, 92 % for anidulafungin, and 90 % for caspofungin. The CA was >90 % for all organism-drug combinations with the exception of C. glabrata and anidulafungin (89 %). Spearman’s rho for EUCAST/CLSI was 0.89 (p < 0.001) for caspofungin, 0.85 (p < 0.001) for anidulafungin, and 0.83 for micafungin (p < 0.001). Conclusions Independent of the procedure applied, no alarming resistance to the tested agents was found, although a reduced susceptibility was detected for C. glabrata complex. The EUCAST and CLSI methods produce similar MICs, indicating that using one method or the other should not result in susceptibilities different enough to affect treatment decisions.
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Affiliation(s)
- Maria Teresa Montagna
- Department of Biomedical Science and Human Oncology, Hygiene Section, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
| | - Grazia Lovero
- Department of Biomedical Science and Human Oncology, Hygiene Section, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
| | - Caterina Coretti
- Department of Biomedical Science and Human Oncology, Hygiene Section, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
| | - Domenico Martinelli
- Department of Medical and Surgical Sciences, Hygiene Section, University of Foggia, Via Gramsci 89-91, 71100, Foggia, Italy.
| | - Osvalda De Giglio
- Department of Biomedical Science and Human Oncology, Hygiene Section, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
| | - Roberta Iatta
- Department of Veterinary Medicine, University of Bari Aldo Moro, Str. Prov. per Casamassima Km 3, Valenzano, Bari, Italy.
| | - Stella Balbino
- Department of Biomedical Science and Human Oncology, Hygiene Section, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
| | - Antonio Rosato
- Department of Pharmacy-Drug Sciences, University of Bari Aldo Moro, Campus-Via Orabona, 4, Bari, Italy.
| | - Giuseppina Caggiano
- Department of Biomedical Science and Human Oncology, Hygiene Section, University of Bari "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
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Yáñez-Carrillo P, Orta-Zavalza E, Gutiérrez-Escobedo G, Patrón-Soberano A, De Las Peñas A, Castaño I. Expression vectors for C-terminal fusions with fluorescent proteins and epitope tags in Candida glabrata. Fungal Genet Biol 2015; 80:43-52. [PMID: 25986172 DOI: 10.1016/j.fgb.2015.04.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Revised: 04/01/2015] [Accepted: 04/27/2015] [Indexed: 10/23/2022]
Abstract
Candida glabrata is a haploid yeast considered the second most common of the Candida species found in nosocomial infections, accounting for approximately 18% of candidemias worldwide. Even though molecular biology methods are easily adapted to study this organism, there are not enough vectors that will allow probing the transcriptional and translational activity of any gene of interest in C. glabrata. In this work we have generated a set of expression vectors to systematically tag any gene of interest at the carboxy-terminus with three different fluorophores (CFP, YFP and mCherry) or three epitopes (HA, FLAG or cMyc) independently. This system offers the possibility to generate translational fusions in three versions: under the gene's own promoter integrated in its native locus in genome, on a replicative plasmid under its own promoter, or on a replicative plasmid under a strong promoter to overexpress the fusions. The expression of these translational fusions will allow determining the transcriptional and translational activity of the gene of interest as well as the intracellular localization of the protein. We have tested these expression vectors with two biosynthetic genes, HIS3 and TRP1. We detected fluorescence under the microscope and we were able to immunodetect the fusions using the three different versions of the system. These vectors permit coexpression of several different fusions simultaneously in the same cell, which will allow determining protein-protein and protein-DNA interactions. This set of vectors adds a new toolbox to study expression and protein interactions in the fungal pathogen C. glabrata.
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Affiliation(s)
- Patricia Yáñez-Carrillo
- IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, Camino a la Presa San José # 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí 78216, Mexico
| | - Emmanuel Orta-Zavalza
- IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, Camino a la Presa San José # 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí 78216, Mexico
| | - Guadalupe Gutiérrez-Escobedo
- IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, Camino a la Presa San José # 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí 78216, Mexico
| | - Araceli Patrón-Soberano
- IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, Camino a la Presa San José # 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí 78216, Mexico
| | - Alejandro De Las Peñas
- IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, Camino a la Presa San José # 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí 78216, Mexico
| | - Irene Castaño
- IPICYT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, Camino a la Presa San José # 2055, Lomas 4a sección, San Luis Potosí, San Luis Potosí 78216, Mexico.
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De Rosa FG, Corcione S, Filippini C, Raviolo S, Fossati L, Montrucchio C, Aldieri C, Petrolo A, Cavallo R, Di Perri G. The Effect on mortality of fluconazole or echinocandins treatment in candidemia in internal medicine wards [corrected]. PLoS One 2015; 10:e0125149. [PMID: 25938486 PMCID: PMC4418611 DOI: 10.1371/journal.pone.0125149] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 03/09/2015] [Indexed: 11/18/2022] Open
Abstract
The incidence of candidemia has increased over the past two decades, with an increased number of cases in Internal Medicine and a prevalence ranging from 24% to 57%. This single-center retrospective study was performed to evaluate the epidemiology and the risk factors associated with mortality of candidemia in patients admitted to Internal Medicine wards (IMWs) of the City of Health and Sciences, Molinette Hospital, Turin, from January 2004 to December 2012. For each patient, demographic, clinical and microbiological data were collected. A case of candidemia was defined as a patient with at least one blood culture positive for Candida spp. Amongst 670 episodes of candidemia, 274 (41%) episodes occurred in IMWs. The mortality was 39% and was associated at multivariate analysis with sepsis, cirrhosis and neurologic diseases, whilst removal of central venous catheter ≤48h was significantly associated with survival. In the 77 patients treated with early antifungal therapy the mortality was 29% and was not significantly different with caspofungin or fluconazole, whilst in patients with definitive therapy the mortality was significantly lower with echinocandins compared to fluconazole (11.7% Vs. 39%; p=0.0289), a finding confirmed by multivariate analysis. The mortality was significantly associated with sepsis, cirrhosis and neurologic diseases, whilst CVC removal ≤48h was associated with survival. In patients with early therapy, fluconazole or caspofungin were equally effective. However, echinocandins were significantly more effective as definitive treatment, a finding not explained by differences in treatment delays. Further studies are needed to understand the full potential of these different therapeutic strategies in IMWs.
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Affiliation(s)
- Francesco G. De Rosa
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
- * E-mail:
| | - Silvia Corcione
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Claudia Filippini
- Department of Anesthesia and Critical Care, City of Health and Sciences, Molinette Hospital, University of Turin, Turin, Italy
| | - Stefania Raviolo
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Lucina Fossati
- Department of Public Health and Pediatric Sciences, Laboratory of Microbiology and Virology, City of Health and Sciences, Molinette, University of Turin, Turin, Italy
| | - Chiara Montrucchio
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Chiara Aldieri
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Alessia Petrolo
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
| | - Rossana Cavallo
- Department of Public Health and Pediatric Sciences, Laboratory of Microbiology and Virology, City of Health and Sciences, Molinette, University of Turin, Turin, Italy
| | - Giovanni Di Perri
- Department of Medical Sciences, Infectious Diseases at Amedeo di Savoia Hospital, University of Turin, Turin, Italy
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The Role of Antifungals against Candida Biofilm in Catheter-Related Candidemia. Antibiotics (Basel) 2014; 4:1-17. [PMID: 27025612 PMCID: PMC4790322 DOI: 10.3390/antibiotics4010001] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 12/09/2014] [Indexed: 12/26/2022] Open
Abstract
Catheter-related bloodstream infection (C-RBSI) is one of the most frequent nosocomial infections. It is associated with high rates of morbidity and mortality. Candida spp. is the third most common cause of C-RBSI after coagulase-negative staphylococci and Staphylococcus aureus and is responsible for approximately 8% of episodes. The main cause of catheter-related candidemia is the ability of some Candida strains-mainly C. albicans and C. parapsilosis-to produce biofilms. Many in vitro and in vivo models have been designed to assess the activity of antifungal drugs against Candida biofilms. Echinocandins have proven to be the most active antifungal drugs. Potential options in situations where the catheter cannot be removed include the combination of systemic and lock antifungal therapy. However, well-designed and -executed clinical trials must be performed before firm recommendations can be issued.
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67
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Cowen LE, Sanglard D, Howard SJ, Rogers PD, Perlin DS. Mechanisms of Antifungal Drug Resistance. Cold Spring Harb Perspect Med 2014; 5:a019752. [PMID: 25384768 DOI: 10.1101/cshperspect.a019752] [Citation(s) in RCA: 336] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Antifungal therapy is a central component of patient management for acute and chronic mycoses. Yet, treatment choices are restricted because of the sparse number of antifungal drug classes. Clinical management of fungal diseases is further compromised by the emergence of antifungal drug resistance, which eliminates available drug classes as treatment options. Once considered a rare occurrence, antifungal drug resistance is on the rise in many high-risk medical centers. Most concerning is the evolution of multidrug- resistant organisms refractory to several different classes of antifungal agents, especially among common Candida species. The mechanisms responsible are mostly shared by both resistant strains displaying inherently reduced susceptibility and those acquiring resistance during therapy. The molecular mechanisms include altered drug affinity and target abundance, reduced intracellular drug levels caused by efflux pumps, and formation of biofilms. New insights into genetic factors regulating these mechanisms, as well as cellular factors important for stress adaptation, provide a foundation to better understand the emergence of antifungal drug resistance.
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Affiliation(s)
- Leah E Cowen
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Dominique Sanglard
- University of Lausanne and University Hospital Center, Institute of Microbiology, 1011 Lausanne, Switzerland
| | - Susan J Howard
- University of Liverpool, Sherrington Building, Ashton Street, Liverpool L69 3GE, United Kingdom
| | - P David Rogers
- College of Pharmacy, The University of Tennessee Health Science Center, Memphis, Tennessee 38163
| | - David S Perlin
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey 07103
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Colomba C, Trizzino M, Imburgia C, Madonia S, Siracusa L, Giammanco GM. Candida glabrata meningitis and endocarditis: a late severe complication of candidemia. Int J Infect Dis 2014; 29:174-5. [PMID: 25449253 DOI: 10.1016/j.ijid.2014.04.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2014] [Revised: 04/12/2014] [Accepted: 04/29/2014] [Indexed: 11/26/2022] Open
Abstract
We report an unusual case of Candida glabrata meningitis and endocarditis in a young Caucasian woman with a prosthetic aortic valve and suffering from a dissecting thoraco-abdominal aortic aneurysm. C. glabrata was isolated from culture of the cerebrospinal fluid. Candida infection of the central nervous system is an uncommon manifestation of disseminated infection due to Candida species. Our case report also highlights the intrinsic resistance of C. glabrata to azoles.
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Affiliation(s)
- Claudia Colomba
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile, Università di Palermo, Palermo, Italy.
| | - Marcello Trizzino
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile, Università di Palermo, Palermo, Italy
| | - Claudia Imburgia
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile, Università di Palermo, Palermo, Italy
| | - Simona Madonia
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile, Università di Palermo, Palermo, Italy
| | - Lucia Siracusa
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile, Università di Palermo, Palermo, Italy
| | - Giovanni Maurizio Giammanco
- Dipartimento di Scienze per la Promozione della Salute e Materno Infantile, Università di Palermo, Palermo, Italy
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69
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Perlin DS. Echinocandin resistance, susceptibility testing and prophylaxis: implications for patient management. Drugs 2014; 74:1573-85. [PMID: 25255923 PMCID: PMC4201113 DOI: 10.1007/s40265-014-0286-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This article addresses the emergence of echinocandin resistance among Candida species, mechanisms of resistance, factors that promote resistance and confounding issues surrounding standard susceptibility testing. Fungal infections remain a significant cause of global morbidity and mortality, especially among patients with underlying immunosupression. Antifungal therapy is a critical component of patient management for acute and chronic diseases. Yet, therapeutic choices are limited due to only a few drug classes available to treat systemic disease. Moreover, the problem is exacerbated by the emergence of antifungal resistance, which has resulted in difficult to manage multidrug resistant strains. Echinocandin drugs are now the preferred choice to treat a range of candidiasis. These drugs target and inhibit the fungal-specific enzyme glucan synthase, which is responsible for the biosynthesis of a key cell wall polymer. Therapeutic failures involving acquisition of resistance among susceptible organisms like Candida albicans is largely a rare event. However, in recent years, there is an alarming trend of increased resistance among strains of Candida glabrata, which in many cases are also resistant to azole drugs. Echinocandin resistance is always acquired during therapy and the mechanism of resistance is well established to involve amino acid changes in "hot-spot" regions of the Fks subunits carrying the catalytic portion of glucan synthase. These changes significantly decrease the sensitivity of the enzyme to drug resulting in higher MIC values. A range of drug responses, from complete to partial refractory response, is observed depending on the nature of the amino acid substitution, and clinical responses are recapitulated in pharmacodynamic models of infection. The cellular processes promoting the formation of resistant Fks strains involve complex stress response pathways, which yield a variety of adaptive compensatory genetic responses. Stress-adapted cells become drug tolerant and can form stable drug resistant FKS mutations with continued drug exposure. A major concern for resistance detection is that classical broth microdilution techniques show significant variability among clinical microbiology laboratories for certain echinocandin drugs and Candida species. The consequence is that susceptible strains are misclassified according to established clinical breakpoints, and this has led to confusion in the field. Clinical factors that appear to promote echinocandin resistance include the expanding use of antifungal agents for empiric therapy and prophylaxis. Furthermore, host reservoirs such as biofilms in the gastrointestinal tract or intra-abdominal infections can seed development of resistant organisms during therapy. A fundamental understanding of the primary molecular resistance mechanism, along with cellular and clinical factors that promote resistance emergence, is critical to develop better diagnostic tools and therapeutic strategies to overcome and prevent echinocandin resistance.
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Affiliation(s)
- David S Perlin
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, 07103, USA,
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Faria-Ramos I, Tavares PR, Farinha S, Neves-Maia J, Miranda IM, Silva RM, Estevinho LM, Pina-Vaz C, Rodrigues AG. Environmental azole fungicide, prochloraz, can induce cross-resistance to medical triazoles in Candida glabrata. FEMS Yeast Res 2014; 14:1119-23. [PMID: 25132632 DOI: 10.1111/1567-1364.12193] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 07/30/2014] [Accepted: 07/30/2014] [Indexed: 11/26/2022] Open
Abstract
Acquisition of azole resistance by clinically relevant yeasts in nature may result in a significant, yet undetermined, impact in human health. The main goal of this study was to assess the development of cross-resistance between agricultural and clinical azoles by Candida spp. An in vitro induction assay was performed, for a period of 90 days, with prochloraz (PCZ) - an agricultural antifungal. Afterward, the induced molecular resistance mechanisms were unveiled. MIC value of PCZ increased significantly in all Candida spp. isolates. However, only C. glabrata developed cross-resistance to fluconazole and posaconazole. The increased MIC values were stable. Candida glabrata azole resistance acquisition triggered by PCZ exposure involved the upregulation of the ATP binding cassette multidrug transporter genes and the transcription factor, PDR1. Single mutation previously implicated in azole resistance was found in PDR1 while ERG11 showed several synonymous single nucleotide polymorphisms. These results might explain why C. glabrata is so commonly less susceptible to clinical azoles, suggesting that its exposure to agricultural azole antifungals may be associated to the emergence of cross-resistance. Such studies forward potential explanations for the worldwide increasing clinical prevalence of C. glabrata and the associated worse prognosis of an infection by this species.
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Affiliation(s)
- Isabel Faria-Ramos
- Microbiology Department, Faculty of Medicine, University of Porto, Porto, Portugal
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71
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Berdal JE, Haagensen R, Ranheim T, Bjørnholt JV. Nosocomial candidemia; risk factors and prognosis revisited; 11 years experience from a Norwegian secondary hospital. PLoS One 2014; 9:e103916. [PMID: 25079361 PMCID: PMC4117589 DOI: 10.1371/journal.pone.0103916] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 07/03/2014] [Indexed: 11/21/2022] Open
Abstract
The aim of the study was to review the epidemiology and prognosis of candidemia in a secondary hospital, and to examine the intra-hospital distribution of candidemia patients. Study design is a retrospective cohort study. Trough 2002–2012, 110 cases of candidemia were diagnosed, giving an incidence of 2, 6/100000 citizens/year. Overall prognosis of candidemia was dismal, with a 30 days case fatality rate of 49% and one year case fatality rate of 64%. Candidemia was a terminal event in 55% of 30 days non-survivors, defined as Candida blood cultures reported positive on the day of death or thereafter (39%), or treatment refrained due to hopeless short-term prognosis (16%). In terminal event candidemias, advanced or incurable cancer was present in 29%. Non-survivors at 30 days were 9 years (median) older than survivors. In 30 days survivors, candidemia was not recognised before discharge in 13% of cases. No treatment were given and no deaths or complications were observed in this group. Candidemia patients were grouped into 8 patient categories: Abdominal surgery (35%), urology (13%), other surgery (11%), pneumonia (13%), haematological malignancy (7%), intravenous drug abuse (4%), other medical (15%), and new-borns (3%). Candidemia was diagnosed while admitted in the ICU in 46% of patients. Urology related cases were all diagnosed in the general ward. Multiple surgical procedures were done in 60% of abdominal surgery patients. Antibiotics were administered prior to candidemia in 87% of patients, with median duration 17 (1–108) days. Neutropenia was less common than expected in patients with candidemia (8/105) and closely associated to haematological malignancy (6/8). Compared with previous national figures the epidemiology of invasive candidiasis seems not to have changed over the last decade.
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Affiliation(s)
- Jan-Erik Berdal
- Department of Infectious Diseases, Akershus University Hospital, Nordbyhagen, Norway
- * E-mail:
| | - Rolf Haagensen
- Department of Anaesthesiology, Akershus University Hospital, Nordbyhagen, Norway
| | - Trond Ranheim
- Department of Microbiology, Akershus University Hospital, Nordbyhagen, Norway
| | - Jørgen V. Bjørnholt
- Department of Infectious Disease Epidemiology Norwegian Institute of Public Health, Oslo, Norway
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Delfino D, Scordino F, Pernice I, Lo Passo C, Galbo R, David A, Barberi I, Criseo G, Cascio A, Romeo O. Potential association of specific Candida parapsilosis genotypes, bloodstream infections and colonization of health workers' hands. Clin Microbiol Infect 2014; 20:O946-51. [PMID: 24845557 DOI: 10.1111/1469-0691.12685] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 05/14/2014] [Accepted: 05/15/2014] [Indexed: 01/12/2023]
Abstract
Fungal nosocomial infections continue to be a serious problem among hospitalized patients, decreasing quality of life and adding millions of euros to healthcare costs. The aim of this study was to describe the pattern of fungi associated with the hands of healthcare workers and to genotype Candida parapsilosis isolates in order to understand whether their high clinical prevalence stems from endemic nosocomial genotypes or from the real emergence of epidemiologically-unrelated strains. Approximately 39% (50/129) of healthcare workers were positive for yeasts and among 77 different fungal isolates recovered, C. parapsilosis was the most frequent (44/77; 57%). Twenty-seven diverse genotypes were obtained by microsatellite analysis of 42 selected blood and hand isolates. Most of the isolates from hands showed a new, unrelated, genotype, whereas a particular group of closely related genotypes prevailed in blood samples. Some of the latter genotypes were also found on the hands of healthcare workers, indicating a persistence of these clones within our hospital. C. parapsilosis genotypes from the hands were much more heterogeneous than clinical ones, thus reflecting a high genetic diversity among isolates, which is notably unusual and unexpected for this species.
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Affiliation(s)
- D Delfino
- Department of Human Pathology, University of Messina, Messina, Italy
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73
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Milazzo L, Peri AM, Mazzali C, Grande R, Cazzani C, Ricaboni D, Castelli A, Raimondi F, Magni C, Galli M, Antinori S. Candidaemia observed at a university hospital in Milan (northern Italy) and review of published studies from 2010 to 2014. Mycopathologia 2014; 178:227-41. [PMID: 25056143 DOI: 10.1007/s11046-014-9786-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 07/07/2014] [Indexed: 01/08/2023]
Abstract
BACKGROUND Candida species represent the fourth leading cause of nosocomial bloodstream infections (BSI) worldwide. However, candidaemia rates and species involved vary geographically. OBJECTIVES To evaluate the epidemiological pattern, risk factors for mortality and antifungal therapy of Candida BSI over a 5-year period (2008-2012) in a university hospital in northern Italy together with a review of the recent literature concerning candidaemia. METHODS A retrospective cohort study cross-linked with microbiology database was performed. RESULTS A total of 89 Candida BSI were identified in 42 males (47 %) and 47 females (52.8 %). The median age was 69 years (interquartile range 55-78) with 61.8 % of patients being older than 65 years. Considering all hospitalized patients, the overall incidence rate of candidaemia increased significantly from 2008 to 2012 (from 0.4 to 1.68 episodes per 10,000 patient/days) (p = 0.0001) with a mean linear increase in 5 new cases per year. Candida albicans was the predominant species isolated (64 %) followed by C. glabrata (19.1 %). The latter species was observed with significantly higher frequency in Internal Medicine and Intensive Care Units (ICU). In-hospital crude mortality was 41.6 %. CONCLUSIONS Candidaemia is an increasing BSI in our university hospital, in accordance with that observed in northern Italy, and it is still associated with high in-hospital crude mortality.
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Affiliation(s)
- Laura Milazzo
- III Division of Infectious Diseases, Department of Biomedical and Clinical Sciences L. Sacco, Luigi Sacco Hospital, University of Milan, Via G.B. Grassi 74, 20157, Milan, Italy,
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Species distribution and in vitro antifungal susceptibility profiles of yeast isolates from invasive infections during a Portuguese multicenter survey. Eur J Clin Microbiol Infect Dis 2014; 33:2241-7. [PMID: 25012821 DOI: 10.1007/s10096-014-2194-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 06/22/2014] [Indexed: 01/12/2023]
Abstract
This is the first Portuguese multicenter observational and descriptive study that provides insights on the species distribution and susceptibility profiles of yeast isolates from fungemia episodes. Ten district hospitals across Portugal contributed by collecting yeast isolates from blood cultures and answering questionnaires concerning patients' data during a 12-month period. Molecular identification of cryptic species of Candida parapsilosis and C. glabrata complex was performed. The susceptibility profile of each isolate, considering eight of the most often used antifungals, was determined. Both Clinical and Laboratory Standards Institute (CLSI) and European Committee on Antimicrobial Susceptibility Testing (EUCAST) protocols were applied. The incidence of 240 episodes of fungemia was 0.88/1,000 admissions. Fifteen different species were found, with C. albicans (40 %) being the most prevalent, followed by C. parapsilosis (23 %) and C. glabrata (13 %). Most isolates were recovered from patients admitted to surgical wards or intensive care units, with 57 % being males and 32 % aged between 41 and 60 years. For both the CLSI and EUCAST protocols, the overall susceptibility rates ranged from 74 to 97 % for echinocandins and from 84 to 98 % for azoles. Important resistance rate discrepancies between protocols were observed in C. albicans and C. glabrata for echinocandins and in C. parapsilosis and C. tropicalis for azoles. Death associated with fungemia occurred in 25 % of the cases, with more than half of C. glabrata infections being fatal. The great number of Candida non-albicans is noteworthy despite a relatively low antifungal resistance rate. Studies like this are essential in order to improve empirical treatment guidelines.
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75
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Micafungin at physiological serum concentrations shows antifungal activity against Candida albicans and Candida parapsilosis biofilms. Antimicrob Agents Chemother 2014; 58:5581-4. [PMID: 24957821 DOI: 10.1128/aac.02738-14] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We assessed the in vitro activity of micafungin against preformed Candida biofilms by measuring the concentration of drug causing the most fungal damage and inhibition of regrowth. We studied 37 biofilm-producing Candida spp. strains from blood cultures. We showed that micafungin was active against planktonic and sessile forms of Candida albicans strains and moderately active against Candida parapsilosis sessile cells. Concentrations of micafungin above 2 μg/ml were sufficiently high to inactivate regrowth of Candida sessile cells.
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76
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Guembe M, Guinea J, Marcos-Zambrano L, Fernandez-Cruz A, Pelaez T, Munoz P, Bouza E. Is Biofilm Production a Predictor of Catheter-Related Candidemia? Med Mycol 2014; 52:407-10. [DOI: 10.1093/mmy/myt031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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77
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Martí-Carrizosa M, Sánchez-Reus F, March F, Coll P. Fungemia in a Spanish hospital: the role of Candida parapsilosis over a 15-year period. ACTA ACUST UNITED AC 2014; 46:454-61. [DOI: 10.3109/00365548.2014.900190] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Fernández-Ruiz M, Aguado JM, Almirante B, Lora-Pablos D, Padilla B, Puig-Asensio M, Montejo M, García-Rodríguez J, Pemán J, Ruiz Pérez de Pipaón M, Cuenca-Estrella M, Padilla B, Muñoz P, Guinea J, Paño Pardo JR, García-Rodríguez J, Cerrada CG, Fortún J, Martín P, Gómez E, Ryan P, Campelo C, de los Santos Gil I, Buendía V, Gorricho BP, Alonso M, Sanz FS, Aguado JM, Merino P, Romo FG, Gorgolas M, Gadea I, Losa JE, Delgado-Iribarren A, Ramos A, Romero Y, Romero IS, Zaragoza O, Cuenca-Estrella M, Rodriguez-Baño J, Suarez AI, Loza A, Aller García AI, Martín-Mazuelos E, de Pipaón MRP, Garnacho J, Ortiz C, Chávez M, Maroto FL, Salavert M, Pemán J, Blanquer J, Navarro D, Camarena JJ, Zaragoza R, Abril V, Gimeno C, Hernáez S, Ezpeleta G, Bereciartua E, Hernández Almaraz JL, Montejo M, Rivas RA, Ayarza R, Ma Planes A, Ruiz Camps I, Almirante B, Mensa J, Almela M, Gurgui M, Sánchez-Reus F, Martinez-Montauti J, Sierra M, Horcajada JP, Sorli L, Gómez J, Gené A, Urrea M, Valerio M, Díaz-Martín A, Puchades F, Mularoni A. Initial Use of Echinocandins Does Not Negatively Influence Outcome in Candida parapsilosis Bloodstream Infection: A Propensity Score Analysis. Clin Infect Dis 2014; 58:1413-21. [DOI: 10.1093/cid/ciu158] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Abstract
The number of immunosuppressive patients has increased significantly in recent years. These patients are at risk for opportunistic infections, especially fungal infections. Candidiasis is one of the most frequent fungal infections determined in these immunosuppressive patients and its epidemiology has changed over the last two decades. Recently, new antifungal agents and new therapy strategies such as antifungal prophylaxis, secondary prophylaxis, and preemptive therapy have come into use. These changes resulted in the alteration of Candida species causing invasive infections. The incidence of Candida albicans was decreased in many countries, especially among patients with immunosuppressive disorders, while the incidence of species other than C. albicans was increased. In this review, incidence, risk factors, and species distribution of invasive candidiasis are discussed.
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Affiliation(s)
- Nur Yapar
- Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Dokuz Eylül University, İzmir, Turkey
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Taj-Aldeen SJ, Kolecka A, Boesten R, Alolaqi A, Almaslamani M, Chandra P, Meis JF, Boekhout T. Epidemiology of candidemia in Qatar, the Middle East: performance of MALDI-TOF MS for the identification of Candida species, species distribution, outcome, and susceptibility pattern. Infection 2013; 42:393-404. [PMID: 24352810 DOI: 10.1007/s15010-013-0570-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 12/02/2013] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Bloodstream infections (BSIs) due to Candida spp. constitute the predominant group of hospital-based fungal infections worldwide. A retrospective study evaluated the performance of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for the identification of BSI Candida isolates. The epidemiology, risk factors, demographic features, species distribution, and clinical outcome associated with candidemia in patients admitted to a single tertiary-care hospital in Qatar, were analyzed. METHODS A single-center, retrospective analysis covering the period from January 1, 2004 to December 31, 2010 was performed. Molecular identification used sequence analysis of the D1/D2 domains of the large subunit ribosomal DNA (LSU rDNA) and the ITS1/2 regions of the rDNA. MALDI-TOF MS-based identification of all yeast isolates was performed with the ethanol/formic acid extraction protocol according to Bruker Daltonics (Bremen, Germany). The susceptibility profiles of 201 isolates to amphotericin B, itraconazole, fluconazole, voriconazole, anidulafungin, caspofungin, posaconazole, and isavuconazole were tested using CLSI standard broth microdilution method (M27-A3 and M27 S4) guidelines. Statistical analyses were performed with the statistical package SPSS 19.0. RESULTS A total of 187 patients with 201 episodes of candidemia were identified. Candida albicans was the most common species isolated (33.8 %; n = 68), whereas non-albicans Candida species represented 66.2 % (n = 133) of the episodes. The species distribution and outcome of candidemia showed a difference in the crude mortality between patients infected with C. albicans (n = 30; 45.5 %) and non-albicans Candida species. For example, C. parapsilosis candidemia was associated with the lowest mortality rate (40.6 %), and patients with other non-albicans species had the highest mortality rate (68-71.4 %). High mortality rates were observed among pediatric (<1 year of age) and elderly patients (>60 years of age). All strains showed low minimum inhibitory concentrations (MICs) (MIC90 of 0.063 μg/ml) to isavuconazole. The overall resistance to voriconazole in vitro antifungal activity was 2.5 %. C. glabrata (n = 38) had an MIC90 of 8 μg/ml for fluconazole. Most yeast isolates were susceptible to anidulafungin (>99.5 %) and 81.1 % to caspofungin. Resistance to anidulafungin was detected in 1/8 (12.5 %) isolates of C. orthopsilosis. According to new Clinical and Laboratory Standards Institute (CLSI) breakpoints, C. glabrata (n = 38) showed 100 % resistance, and 37/68 (54.4 %) C. albicans isolates were susceptible dose dependent (SDD) to caspofungin. Identification by MALDI-TOF MS was in 100 % concordance with molecular identification. CONCLUSION The Middle East epidemiology of candidemia has a unique species distribution pattern distinct from other parts of the globe. High mortality rates were observed among pediatric (<1 year of age) and elderly patients (>60 years of age). All strains were susceptible to isavuconazole. All isolates of C.glabrata were resistant to caspofungin based on M27 S4. MALDI-TOF MS is a highly useful method for the routine identification of yeast isolates in clinical setting to achieve successful therapeutic treatment.
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Affiliation(s)
- S J Taj-Aldeen
- Mycology Unit, Microbiology Division, Department of Laboratory Medicine and Pathology, Hamad Medical Corporation, P.O. Box 3050, Doha, Qatar,
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