1
|
McHugh JW, Bayless DR, Ranganath N, Stevens RW, Kind DR, Wengenack NL, Shah AS. Candida guilliermondii fungemia: a 12-year retrospective review of antimicrobial susceptibility patterns at a reference laboratory and tertiary care center. J Clin Microbiol 2024:e0105724. [PMID: 39440933 DOI: 10.1128/jcm.01057-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2024] [Accepted: 09/12/2024] [Indexed: 10/25/2024] Open
Abstract
The prevalence of invasive candidiasis caused by non-albicans Candida species is increasing. Candida guilliermondii is an infrequent cause of candidemia but has been associated with decreased susceptibility to triazoles. Clinical data related to the infection with C. guilliermondii are sparse. Our study evaluated the antifungal susceptibility testing (AST) for C. guilliermondii isolates submitted to a reference laboratory over a 12-year period (2012-2023). AST patterns were examined using Clinical and Laboratory Standards Institute (CLSI) and European Committee on Antimicrobial Susceptibility Testing (EUCAST) epidemiological cutoff values (ECVs) and breakpoints. Where isolates were identified from patients treated at our institution, retrospective chart review was performed to describe patient risk factors, treatment approaches, and outcomes associated with C. guilliermondii fungemia. One hundred twelve blood culture isolates of C. guilliermondii were identified, and clinical data were available for 21 fungemic patients. A significant number of isolates (9.8-20.5%) were observed to be non-wild type for various triazoles. All isolates were susceptible to micafungin. A majority (76.2%) of cases of C. guilliermondii fungemia treated at our tertiary care center were hospital-acquired, and two-thirds of patients were immunocompromised at the time of diagnosis. Ten of the 21 patients died within 60 days of fungemia, although mortality was directly or partially attributed to C. guilliermondii fungemia in only four cases (19.0%). Echinocandins may be used for empiric therapy for C. guilliermondii until the results of AST are available. Further research is required to determine appropriate clinical breakpoints for triazoles. IMPORTANCE Our study addresses a significant knowledge gap in the clinical management of this non-Candida albicans species. Our retrospective review includes comprehensive AST data for 112 Candida guilliermondii isolates, which is the largest number of isolates reported from the United States to date. Susceptibility data are supplemented by clinical outcomes, where isolates were identified for patients treated at Mayo Clinic. Key findings from our study include the observation that a notable proportion of C. guilliermondii isolates exhibit non-wild-type profiles for various triazoles. Importantly, all isolates remained susceptible to echinocandins, suggesting their efficacy as first-line therapy in the absence of timely susceptibility results. Furthermore, our study highlights the high mortality associated with C. guilliermondii fungemia in immunocompromised patients, emphasizing the urgent need for optimized treatment strategies.
Collapse
Affiliation(s)
- Jack W McHugh
- Division of Public Health, Infectious Diseases and Occupational Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - David R Bayless
- Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Nischal Ranganath
- Division of Public Health, Infectious Diseases and Occupational Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Ryan W Stevens
- Department of Pharmacy Services, Mayo Clinic, Rochester, Minnesota, USA
| | - Dalton R Kind
- Division of Clinical Microbiology, Department of Laboratory Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Nancy L Wengenack
- Division of Clinical Microbiology, Department of Laboratory Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Aditya S Shah
- Division of Public Health, Infectious Diseases and Occupational Medicine, Mayo Clinic, Rochester, Minnesota, USA
| |
Collapse
|
2
|
Calvo M, Scalia G, Trovato L. Antifungal Susceptibility Data and Epidemiological Distribution of Candida spp.: An In Vitro Five-Year Evaluation at University Hospital Policlinico of Catania and a Comprehensive Literature Review. Antibiotics (Basel) 2024; 13:914. [PMID: 39452181 PMCID: PMC11505318 DOI: 10.3390/antibiotics13100914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2024] [Revised: 09/02/2024] [Accepted: 09/18/2024] [Indexed: 10/26/2024] Open
Abstract
BACKGROUND Invasive fungal infections represent a concerning healthcare issue, with Candida spp. reported as the main aetiological agent. Candida spp. bloodstream infections show high mortality rates, indicating increasing antifungal-resistance episodes as a contributing feature. Despite the global prevalence of C. albicans, non-albicans species emerged as significant in the last decades. METHODS The present manuscript reports a five-year evaluation on Candida spp. bloodstream isolates and their antifungal susceptibility profiles, aiming to enrich the literature and epidemiological data. RESULTS According to the gathered data, antifungal-resistance cases remained uncommon. However, the study revealed rare resistance phenotypes such as a single case of pan-echinocandin resistance C. albicans. CONCLUSIONS Finally, a comprehensive review of Candida spp. antifungal resistance integrates the data, emphasizing the extreme species-specific variability and the consequent importance of always providing species identification.
Collapse
Affiliation(s)
- Maddalena Calvo
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.C.); (G.S.)
- U.O.C. Laboratory Analysis Unit, A.O.U. Policlinico “G. Rodolico-San Marco” Catania, 95123 Catania, Italy
| | - Guido Scalia
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.C.); (G.S.)
- U.O.C. Laboratory Analysis Unit, A.O.U. Policlinico “G. Rodolico-San Marco” Catania, 95123 Catania, Italy
| | - Laura Trovato
- Department of Biomedical and Biotechnological Sciences, University of Catania, 95123 Catania, Italy; (M.C.); (G.S.)
- U.O.C. Laboratory Analysis Unit, A.O.U. Policlinico “G. Rodolico-San Marco” Catania, 95123 Catania, Italy
| |
Collapse
|
3
|
Gierke AM, Hessling M. Sensitivity Analysis of C. auris, S. cerevisiae, and C. cladosporioides by Irradiation with Far-UVC, UVC, and UVB. Pathog Immun 2024; 9:135-151. [PMID: 39247685 PMCID: PMC11378758 DOI: 10.20411/pai.v9i2.723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 07/31/2024] [Indexed: 09/10/2024] Open
Abstract
Background The World Health Organization has published a list of pathogenic fungi with prior-itizing groups and calls for research and development of antifungal measures, with Candida auris belonging to the group with high priority. Methods The photosensitivity towards short wavelength ultraviolet irradiation (Far-UVC, UVC, and UVB) was investigated and compared to other yeasts (Saccharomyces cerevisiae) and a mold (Cladosporium cladosporioides). The observed 1-log reduction doses were compared to literature values of other representatives of the genus Candida, but also with S. cerevisiae, Aspergillus niger, and A. fumigatus. Results For the determined 1-log reduction doses, an increase with higher wavelengths was observed. A 1-log reduction dose of 4.3 mJ/cm2 was determined for C. auris when irradiated at 222 nm, a dose of 6.1 mJ/cm2 at 254 nm and a 1-log reduction dose of 51.3 mJ/cm2 was required when irradiated with UVB. Conclusions It was observed that S. cerevisiae is a possible surrogate for C. auris for irradiation with Far-UVC and UVB due to close 1-log reduction doses. No surrogate suitability was verified for C. cladosporioides in relation to A. niger and A. fumigatus for irradiation with a wavelength of 254 nm and for A. niger at 222 nm.
Collapse
Affiliation(s)
- Anna-Maria Gierke
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
| | - Martin Hessling
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
| |
Collapse
|
4
|
Yarzábal Rodríguez LA, Álvarez Gutiérrez PE, Gunde-Cimerman N, Ciancas Jiménez JC, Gutiérrez-Cepeda A, Ocaña AMF, Batista-García RA. Exploring extremophilic fungi in soil mycobiome for sustainable agriculture amid global change. Nat Commun 2024; 15:6951. [PMID: 39138171 PMCID: PMC11322326 DOI: 10.1038/s41467-024-51223-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 07/24/2024] [Indexed: 08/15/2024] Open
Abstract
As the Earth warms, alternatives to traditional farming are crucial. Exploring fungi, especially poly extremophilic and extremotolerant species, to be used as plant probiotics, represents a promising option. Extremophilic fungi offer avenues for developing and producing innovative biofertilizers, effective biocontrol agents against plant pathogens, and resilient enzymes active under extreme conditions, all of which are crucial to enhance agricultural efficiency and sustainability through improved soil fertility and decreased reliance on agrochemicals. Yet, extremophilic fungi's potential remains underexplored and, therefore, comprehensive research is needed to understand their roles as tools to foster sustainable agriculture practices amid climate change. Efforts should concentrate on unraveling the complex dynamics of plant-fungi interactions and harnessing extremophilic fungi's ecological functions to influence plant growth and development. Aspects such as plant's epigenome remodeling, fungal extracellular vesicle production, secondary metabolism regulation, and impact on native soil microbiota are among many deserving to be explored in depth. Caution is advised, however, as extremophilic and extremotolerant fungi can act as both mitigators of crop diseases and as opportunistic pathogens, underscoring the necessity for balanced research to optimize benefits while mitigating risks in agricultural settings.
Collapse
Grants
- This work was supported by Fondo Nacional de Innovación y Desarrollo Científico-Tecnológico (FONDOCYT), Ministerio de Educación Superior, Ciencia y Tecnología (MESCYT), Government of Dominican Republic: Project COD. 2022-2B2-078. This work was supported by Darwin Initiative Round 27: Partnership Project DARPP220, and Darwin Initiative Round 30: Project DIR30S2/1004. This study was also supported by funding from the Slovenian Research Agency to Infrastructural Centre Mycosmo (MRIC UL, I0-0022), programs P4-0432 and P1-0198. Authors appreciate the support received from the European Commission – Program H2020, Project GEN4OLIVE: 101000427, Topic SFS-28-2018-2019-2020 Genetic resources and pre-breeding communities. RAB-G received a Sabbatical fellowship (CVU: 389616) from the National Council of Humanities, Sciences and Technologies (CONAHCyT), Government of Mexico. This work was supported by RYC2022-037554-I project funded by MCIN/AEI/10.13039/501100011033 and FSE+.
Collapse
Affiliation(s)
- Luis Andrés Yarzábal Rodríguez
- Carrera de Bioquímica y Farmacia. Grupo de Microbiología Molecular y Biotecnología (GI-M2YB). Unidad de Salud y Bienestar, Universidad Católica de Cuenca, Cuenca, Ecuador
| | | | - Nina Gunde-Cimerman
- Departament of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | | | - Adrián Gutiérrez-Cepeda
- Instituto de Investigación en Salud, Facultad de Ciencias de la Salud, Universidad Autónoma de Santo Domingo, Santo Domingo, Dominican Republic
- Instituto de Química, Facultad de Ciencias, Universidad Autónoma de Santo Domingo, Santo Domingo, Dominican Republic
| | - Ana María Fernández Ocaña
- Departamento de Biología Animal, Biología Vegetal y Ecología. Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain
| | - Ramón Alberto Batista-García
- Departamento de Biología Animal, Biología Vegetal y Ecología. Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain.
- Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos, Mexico.
| |
Collapse
|
5
|
Moreau J, Noël T, Point K, Tewes F, Deroche L, Clarhaut J, Fitton-Ouhabi V, Perraud E, Marchand S, Buyck JM, Brunet K. Pan-azole-resistant Meyerozyma guilliermondii clonal isolates harbouring a double F126L and L505F mutation in Erg11. Mycoses 2024; 67:e13704. [PMID: 38429226 DOI: 10.1111/myc.13704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/29/2024] [Accepted: 02/02/2024] [Indexed: 03/03/2024]
Abstract
BACKGROUND Meyerozyma guilliermondii is a yeast species responsible for invasive fungal infections. It has high minimum inhibitory concentrations (MICs) to echinocandins, the first-line treatment of candidemia. In this context, azole antifungal agents are frequently used. However, in recent years, a number of azole-resistant strains have been described. Their mechanisms of resistance are currently poorly studied. OBJECTIVE The aim of this study was consequently to understand the mechanisms of azole resistance in several clinical isolates of M. guilliermondii. METHODS Ten isolates of M. guilliermondii and the ATCC 6260 reference strain were studied. MICs of azoles were determined first. Whole genome sequencing of the isolates was then carried out and the mutations identified in ERG11 were expressed in a CTG clade yeast model (C. lusitaniae). RNA expression of ERG11, MDR1 and CDR1 was evaluated by quantitative PCR. A phylogenic analysis was developed and performed on M. guilliermondii isolates. Lastly, in vitro experiments on fitness cost and virulence were carried out. RESULTS Of the ten isolates tested, three showed pan-azole resistance. A combination of F126L and L505F mutations in Erg11 was highlighted in these three isolates. Interestingly, a combination of these two mutations was necessary to confer azole resistance. An overexpression of the Cdr1 efflux pump was also evidenced in one strain. Moreover, the three pan-azole-resistant isolates were shown to be genetically related and not associated with a fitness cost or a lower virulence, suggesting a possible clonal transmission. CONCLUSION In conclusion, this study identified an original combination of ERG11 mutations responsible for pan-azole-resistance in M. guilliermondii. Moreover, we proposed a new MLST analysis for M. guilliermondii that identified possible clonal transmission of pan-azole-resistant strains. Future studies are needed to investigate the distribution of this clone in hospital environment and should lead to the reconsideration of the treatment for this species.
Collapse
Affiliation(s)
- Jérémy Moreau
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
| | - Thierry Noël
- Université de Bordeaux, CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, Bordeaux, France
| | - Kévin Point
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
| | - Frédéric Tewes
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
| | - Luc Deroche
- CHU de Poitiers, Service de Virologie, Poitiers, France
| | - Jonathan Clarhaut
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
- CHU de Poitiers, Service de Toxicologie-Pharmacocinétique, Poitiers, France
| | - Valérie Fitton-Ouhabi
- Université de Bordeaux, CNRS, Microbiologie Fondamentale et Pathogénicité, UMR 5234, Bordeaux, France
| | - Estelle Perraud
- CHU de Poitiers, Service de Parasitologie et Mycologie Médicale, Poitiers, France
| | - Sandrine Marchand
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
- CHU de Poitiers, Service de Toxicologie-Pharmacocinétique, Poitiers, France
| | - Julien M Buyck
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
| | - Kévin Brunet
- Université de Poitiers, INSERM U1070 PHAR2, Poitiers, France
- CHU de Poitiers, Service de Parasitologie et Mycologie Médicale, Poitiers, France
| |
Collapse
|
6
|
Zheng Z, Tu X, Jiang C, Liu F, Fan C. First case report of Candida guilliermondii native left-sided valve endocarditis. Front Cardiovasc Med 2023; 10:1273255. [PMID: 38111888 PMCID: PMC10725942 DOI: 10.3389/fcvm.2023.1273255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 11/20/2023] [Indexed: 12/20/2023] Open
Abstract
Endocarditis, a life-threatening inflammation of the endocardium, is incited by bacteria, fungi, or other pathogenic microorganisms. Fungal endocarditis closely mirrors bacterial endocarditis in clinical signs and symptoms, leading to potential misdiagnoses. Here, we unveil the inaugural confirmed instance of native left-sided valve endocarditis attributed to Candida guilliermondii. Diagnosis was substantiated through valvular biopsies, blood and vegetative cultures. Treatment encompassed surgical excision of vegetations along with a six-week regimen of fluconazole administration (12 mg/kg/day), followed by 4 years of meticulous monitoring, resulting in sustained patient recovery.
Collapse
Affiliation(s)
- Zilong Zheng
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Xiaokang Tu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Chuanhao Jiang
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Feng Liu
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Chengming Fan
- Department of Cardiovascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, China
| |
Collapse
|
7
|
Borba OSM, Ogawa MM, Kirsztajn GM, Tomimori J. Onychomycosis in immunocompromised population: Phenotypic and molecular identification. Mycoses 2023; 66:1018-1024. [PMID: 37488648 DOI: 10.1111/myc.13634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/30/2023] [Accepted: 07/16/2023] [Indexed: 07/26/2023]
Abstract
Onychomycosis is common among immunosuppressed individuals. Renal transplant recipients (RTR) and lupus nephritis (LN) patients are submitted to corticosteroid and other immunosuppressive therapy; and diabetes mellitus (DM) patients are intrinsically immunocompromised. OBJECTIVES The aim of this study was to characterise and identify fungal infections on the nails (feet and hands) in immunocompromised patients. METHODS The clinical material, nail scales (foot and/or hand), was collected from 47 RTR, 66 LN, 67 DM, and 78 immunocompetent individuals (control group). Phenotypic and molecular analyses were performed. RESULTS A total of 258 patients were examined. There was a female predominance, except in the RTR. The average age was 52 years old. Lateral distal subungual onychomycosis (OSDL) (75.2%), mainly affecting the hallux nail, was frequent. The predominance of dermatophyte on toenails and Candida species on fingernails was statistically significant. A higher frequency of fingernail involvement in LN and DM, and for LN, the difference was significant (p = .0456). Infections by Candida spp. were more frequent in DM. Using molecular methods, 87.2% of diagnoses were confirmed, identifying fungal agents at the species level. Dermatophytes, Trichophyton rubrum and Trichophyton interdigitale and the species of Candida, C. parapsilosis and C. albicans, were the most frequent fungal agents. CONCLUSIONS Molecular techniques (sequencing of ITS regions of rDNA) offer greater accuracy, although there is no difference, regarding the detection. Clinical presentation and fungal species may differ somewhat from the general population. Immunosuppression did not increase fungal detection positivity.
Collapse
Affiliation(s)
- Orion Sant'Anna Motter Borba
- Program in Translational Medicine, Department of Medicine, Laboratory of Cellular Biology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Marilia Marufuji Ogawa
- Department of Dermatology, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Gianna Mastroianni Kirsztajn
- Discipline of Nephrology, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jane Tomimori
- Department of Dermatology, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| |
Collapse
|
8
|
Gómez-Gaviria M, Ramírez-Sotelo U, Mora-Montes HM. Non- albicans Candida Species: Immune Response, Evasion Mechanisms, and New Plant-Derived Alternative Therapies. J Fungi (Basel) 2022; 9:jof9010011. [PMID: 36675832 PMCID: PMC9862154 DOI: 10.3390/jof9010011] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Fungal infections caused by Candida species have become a constant threat to public health, especially for immunocompromised patients, who are considered susceptible to this type of opportunistic infections. Candida albicans is known as the most common etiological agent of candidiasis; however, other species, such as Candida tropicalis, Candida parapsilosis, Nakaseomyces glabrata (previously known as Candida glabrata), Candida auris, Candida guilliermondii, and Pichia kudriavzevii (previously named as Candida krusei), have also gained great importance in recent years. The increasing frequency of the isolation of this non-albicans Candida species is associated with different factors, such as constant exposure to antifungal drugs, the use of catheters in hospitalized patients, cancer, age, and geographic distribution. The main concerns for the control of these pathogens include their ability to evade the mechanisms of action of different drugs, thus developing resistance to antifungal drugs, and it has also been shown that some of these species also manage to evade the host's immunity. These biological traits make candidiasis treatment a challenging task. In this review manuscript, a detailed update of the recent literature on the six most relevant non-albicans Candida species is provided, focusing on the immune response, evasion mechanisms, and new plant-derived compounds with antifungal properties.
Collapse
|
9
|
Ghasemi R, Lotfali E, Rezaei K, Madinehzad SA, Tafti MF, Aliabadi N, Kouhsari E, Fattahi M. Meyerozyma guilliermondii species complex: review of current epidemiology, antifungal resistance, and mechanisms. Braz J Microbiol 2022; 53:1761-1779. [PMID: 36306113 PMCID: PMC9679122 DOI: 10.1007/s42770-022-00813-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 06/30/2022] [Indexed: 01/13/2023] Open
Abstract
Meyerozyma guilliermondii has been accepted as a complex composed of Meyerozyma guilliermondii, Meyerozyma carpophila, and Meyerozyma caribbica. M. guilliermondii is a saprophyte detected on human mucosa and skin. It can lead to serious infections in patients with risk factors like chemotherapy, immunodeficiency, gastrointestinal or cardiovascular surgery, and oncology disorders. Most deaths related to M. guilliermondii infections occur in individuals with malignancy. In recent decades, incidence of M. guilliermondii infections is increased. Sensitivity of this microorganism to conventional antifungals (e.g., amphotericin B, fluconazole, micafungin and anidulafungin) was reduced. Prophylactic and empirical uses of these drugs are linked to elevated minimal inhibitory concentrations (MICs) of M. guilliermondii. Drug resistance has concerned many researchers across the world. They are attempting to discover appropriate solution to combat this challenge. This study reviews the most important mechanisms of resistance to antifungals developed by in M. guilliermondii species complex.
Collapse
Affiliation(s)
- Reza Ghasemi
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ensieh Lotfali
- Department of Medical Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kamran Rezaei
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Ataollah Madinehzad
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdi Falah Tafti
- Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nikta Aliabadi
- Microbiology Department Islamic, Azad University Tehran Branch, Tehran, Iran
| | - Ebrahim Kouhsari
- Department of Laboratory Sciences, Faculty of Paramedicine, Golestan University of Medical Sciences, Gorgan, Iran
- Laboratory Sciences Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Mahsa Fattahi
- Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
10
|
Willaert RG, Kayacan Y, Devreese B. The Flo Adhesin Family. Pathogens 2021; 10:pathogens10111397. [PMID: 34832553 PMCID: PMC8621652 DOI: 10.3390/pathogens10111397] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/11/2021] [Accepted: 10/25/2021] [Indexed: 12/14/2022] Open
Abstract
The first step in the infection of fungal pathogens in humans is the adhesion of the pathogen to host tissue cells or abiotic surfaces such as catheters and implants. One of the main players involved in this are the expressed cell wall adhesins. Here, we review the Flo adhesin family and their involvement in the adhesion of these yeasts during human infections. Firstly, we redefined the Flo adhesin family based on the domain architectures that are present in the Flo adhesins and their functions, and set up a new classification of Flo adhesins. Next, the structure, function, and adhesion mechanisms of the Flo adhesins whose structure has been solved are discussed in detail. Finally, we identified from Pfam database datamining yeasts that could express Flo adhesins and are encountered in human infections and their adhesin architectures. These yeasts are discussed in relation to their adhesion characteristics and involvement in infections.
Collapse
Affiliation(s)
- Ronnie G. Willaert
- Research Group Structural Biology Brussels (SBB), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium;
- Alliance Research Group VUB-UGent NanoMicrobiology (NAMI), 1050 Brussels, Belgium;
- International Joint Research Group VUB-EPFL NanoBiotechnology & NanoMedicine (NANO), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
- Correspondence: ; Tel.: +32-2629-1846
| | - Yeseren Kayacan
- Research Group Structural Biology Brussels (SBB), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium;
- Alliance Research Group VUB-UGent NanoMicrobiology (NAMI), 1050 Brussels, Belgium;
- International Joint Research Group VUB-EPFL NanoBiotechnology & NanoMedicine (NANO), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
- Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Bart Devreese
- Alliance Research Group VUB-UGent NanoMicrobiology (NAMI), 1050 Brussels, Belgium;
- International Joint Research Group VUB-EPFL NanoBiotechnology & NanoMedicine (NANO), Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
- Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
- Laboratory for Microbiology, Gent University (UGent), 9000 Gent, Belgium
| |
Collapse
|
11
|
Bavaro DF, Balena F, Ronga L, Signorile F, Romanelli F, Stolfa S, Sparapano E, De Carlo C, Mosca A, Monno L, Angarano G, Saracino A. Emerging issue of fluconazole-resistant candidemia in a tertiary care hospital of southern italy: time for antifungal stewardship program. J Mycol Med 2021; 32:101206. [PMID: 34624594 DOI: 10.1016/j.mycmed.2021.101206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 08/20/2021] [Accepted: 09/10/2021] [Indexed: 11/19/2022]
Abstract
An increased number of patients is at risk of Candida spp. bloodstream infection (CBSI) in modern medicine. Moreover, the rising of antifungal resistance (AR) was recently reported. All consecutive CBSI occurred in our Hospital (consisting of 1,370 beds) between 2015 and 2018, were reviewed. For each case, Candida species, AR pattern, ward involved and demographic data of patients were recorded. Overall, 304 episodes of CBSI occurred, with a median (q1:first-,q3:third quartile) of 77 (71-82) CBSI/year. Over the years, a significant increase of CBSI due to C. albicans compared to non-albicans strains was recorded in medical wards (from 65% to 71%, p=0.030), while this ratio remained stable in others. An increase of resistant strains to multiple antifungals such as C. guillermondii was noticed in recent years (from 0% to 9.8%, p=0.008). Additionally, from 2015 to 2018 an increase in fluconazole-resistance was recorded in our Hospital (from 7.4% to 17.4%, p=0.025) and a slight increase in voriconazole-resistance (from 0% to 7% in 2018, p=0.161) was observed, while resistance to echinocandin and amphotericin B remained firmly below 2%. This study suggests a rapid spread of antifungal resistance in our Hospital; therefore, an appropriate antifungal stewardship programs is urgently warranted.
Collapse
Affiliation(s)
- Davide Fiore Bavaro
- Clinic of Infectious Diseases, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy.
| | - Flavia Balena
- Clinic of Infectious Diseases, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Luigi Ronga
- Microbiology and Virology Unit, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Fabio Signorile
- Clinic of Infectious Diseases, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Federica Romanelli
- Microbiology and Virology Unit, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Stefania Stolfa
- Microbiology and Virology Unit, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Eleonora Sparapano
- Microbiology and Virology Unit, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Carmela De Carlo
- Microbiology and Virology Unit, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Adriana Mosca
- Microbiology and Virology Unit, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Laura Monno
- Clinic of Infectious Diseases, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Gioacchino Angarano
- Clinic of Infectious Diseases, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| | - Annalisa Saracino
- Clinic of Infectious Diseases, University of Bari, University Hospital Policlinico, Piazza Giulio Cesare n. 11, 70124 Bari Italy
| |
Collapse
|
12
|
Chaves ALS, Trilles L, Alves GM, Figueiredo-Carvalho MHG, Brito-Santos F, Coelho RA, Martins IS, Almeida-Paes R. A case-series of bloodstream infections caused by the Meyerozyma guilliermondii species complex at a reference center of oncology in Brazil. Med Mycol 2021; 59:235-243. [PMID: 32497174 DOI: 10.1093/mmy/myaa044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/06/2020] [Accepted: 05/12/2020] [Indexed: 12/12/2022] Open
Abstract
Bloodstream infections (BSI) caused by Candida species are the fourth cause of healthcare associated infections worldwide. Non-albicans Candida species emerged in the last decades as agents of serious diseases. In this study, clinical and microbiological aspects of six patients with BSI due to the Meyerozyma (Candida) guilliermondii species complex from an oncology reference center in Brazil, were evaluated. To describe demographic and clinical characteristics, medical records of the patients were reviewed. Molecular identification of the isolates was performed by ITS1-5.8S-ITS2 region sequencing. Antifungal susceptibility was evaluated by the EUCAST method and the minimal inhibitory concentrations (MIC) assessed according to the epidemiological cutoff values. Virulence associated phenotypes of the isolates were also studied. Ten isolates from the six patients were evaluated. Five of them were identified as Meyerozyma guilliermondii and the others as Meyerozyma caribbica. One patient was infected with two M. caribbica isolates with different genetic backgrounds. High MICs were observed for fluconazole and echinocandins. Non-wild type isolates to voriconazole appeared in one patient previously treated with this azole. Additionally, two patients survived, despite infected with non-wild type strains for fluconazole and treated with this drug. All isolates produced hemolysin, which was not associated with a poor prognosis, and none produced phospholipases. Aspartic proteases, phytase, and esterase were detected in a few isolates. This study shows the reduced antifungal susceptibility and a variable production of virulence-related enzymes by Meyerozyma spp. In addition, it highlights the poor prognosis of neutropenic patients with BSI caused by this emerging species complex. LAY ABSTRACT Our manuscript describes demographic, clinical and microbiological characteristics of patients with bloodstream infection by the Meyerozyma guilliermondii species complex at a reference center in oncology in Brazil.
Collapse
Affiliation(s)
- Alessandra Leal Silva Chaves
- Clinical Pathology Laboratory, HCI, National Cancer Institute, Rio de Janeiro, Brazil.,Mycology Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Luciana Trilles
- Mycology Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Gabriela Machado Alves
- Mycology Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | | | - Fábio Brito-Santos
- Mycology Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Rowena Alves Coelho
- Mycology Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Ianick S Martins
- Nosocomial Infection Surveillance and Control Program, National Cancer Institute, Rio de Janeiro, Brazil.,Medical School of Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Rodrigo Almeida-Paes
- Mycology Laboratory, Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| |
Collapse
|
13
|
Marutyan S, Marutyan S, Navasardyan L, Hovnanyan K, Trchounian A. Changes in growth kinetic parameters, morphology and mitotic activity of yeasts Candida guilliermondii exposed to the low-intensity waves of 51.8-GHz frequency. Arch Microbiol 2021; 203:3707-3714. [PMID: 33938972 DOI: 10.1007/s00203-021-02336-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 04/03/2021] [Accepted: 04/16/2021] [Indexed: 11/27/2022]
Abstract
Under the influence of electromagnetic waves of millimeter range with the frequency of 51.8 GHz, changes in the morphology, growth parameters and mitotic activity of yeasts C. guilliermondii NP-4 are revealed. Filamentous and giant cells appeared in a population of exposed yeasts. The sigmoid shape of the growth curve remained but the lag phase duration was increased by 2 h in comparison with non-exposed yeasts; accordingly, the log and stationary phases followed 2 h later. The specific growth rate in the log growth phase and colony-forming ability of exposed yeasts was decreased. It is suggested that yeasts have some response mechanisms to 51.8-GHz frequency electromagnetic waves. The results can be used to understand the response mechanisms of microorganisms to non-ionizing radiation, as well as to develop approaches to protect living organisms from it. The effect of electromagnetic waves of 51.8-GHz frequency to suppress yeasts can be applied in biotechnology and medicine.
Collapse
Affiliation(s)
- Seda Marutyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia
| | - Syuzan Marutyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia
| | - Liparit Navasardyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia
| | - Karlen Hovnanyan
- Scientific and Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Sciences of RA, 26 Azatutyan Str, 0014, Yerevan, Armenia
| | - Armen Trchounian
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, 1 A. Manoogyan Str, 0025, Yerevan, Armenia.
| |
Collapse
|
14
|
Expect the unexpected: fungemia caused by uncommon Candida species in a Turkish University Hospital. Eur J Clin Microbiol Infect Dis 2021; 40:1539-1545. [PMID: 33495941 DOI: 10.1007/s10096-020-04147-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 12/28/2020] [Indexed: 10/22/2022]
Abstract
Fungemia caused by uncommon Candida species (UCS) (other than C.albicans, C.glabrata, C.parapsilosis, C.tropicalis, C.krusei) is a rare but emerging threat with their potential to exhibit reduced susceptibility or resistance to antifungal agents. We identified 25 patients with UCS fungemia (9 C.kefyr, 8 C.lusitaniae, 4 C.dubliniensis, 2 C.guilliermondii, 1 C.pelliculosa, 1 C.rugosa) through January 2011 and August 2018. Echinocandins were the most common administered agents, followed by fluconazole. Overall mortality was 44%. Echinocandins and voriconazole showed sufficient activity against all tested isolates. High fluconazole MICs among C.guilliermondii, C.pelliculosa, and C.rugosa were determined. MIC value of C.pelliculosa was above the epidemiological cut-off proposed for fluconazole.
Collapse
|
15
|
Ruchala J, Sibirny AA. Pentose metabolism and conversion to biofuels and high-value chemicals in yeasts. FEMS Microbiol Rev 2020; 45:6034013. [PMID: 33316044 DOI: 10.1093/femsre/fuaa069] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 12/09/2020] [Indexed: 12/15/2022] Open
Abstract
Pentose sugars are widespread in nature and two of them, D-xylose and L-arabinose belong to the most abundant sugars being the second and third by abundance sugars in dry plant biomass (lignocellulose) and in general on planet. Therefore, it is not surprising that metabolism and bioconversion of these pentoses attract much attention. Several different pathways of D-xylose and L-arabinose catabolism in bacteria and yeasts are known. There are even more common and really ubiquitous though not so abundant pentoses, D-ribose and 2-deoxy-D-ribose, the constituents of all living cells. Thus, ribose metabolism is example of endogenous metabolism whereas metabolism of other pentoses, including xylose and L-arabinose, represents examples of the metabolism of foreign exogenous compounds which normally are not constituents of yeast cells. As a rule, pentose degradation by the wild-type strains of microorganisms does not lead to accumulation of high amounts of valuable substances; however, productive strains have been obtained by random selection and metabolic engineering. There are numerous reviews on xylose and (less) L-arabinose metabolism and conversion to high value substances; however, they mostly are devoted to bacteria or the yeast Saccharomyces cerevisiae. This review is devoted to reviewing pentose metabolism and bioconversion mostly in non-conventional yeasts, which naturally metabolize xylose. Pentose metabolism in the recombinant strains of S. cerevisiae is also considered for comparison. The available data on ribose, xylose, L-arabinose transport, metabolism, regulation of these processes, interaction with glucose catabolism and construction of the productive strains of high-value chemicals or pentose (ribose) itself are described. In addition, genome studies of the natural xylose metabolizing yeasts and available tools for their molecular research are reviewed. Metabolism of other pentoses (2-deoxyribose, D-arabinose, lyxose) is briefly reviewed.
Collapse
Affiliation(s)
- Justyna Ruchala
- Department of Microbiology and Molecular Genetics, University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601, Poland.,Department of Molecular Genetics and Biotechnology, Institute of Cell Biology NAS of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
| | - Andriy A Sibirny
- Department of Microbiology and Molecular Genetics, University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601, Poland.,Department of Molecular Genetics and Biotechnology, Institute of Cell Biology NAS of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
| |
Collapse
|
16
|
Yan W, Gao H, Qian X, Jiang Y, Zhou J, Dong W, Xin F, Zhang W, Jiang M. Biotechnological applications of the non-conventional yeast Meyerozyma guilliermondii. Biotechnol Adv 2020; 46:107674. [PMID: 33276074 DOI: 10.1016/j.biotechadv.2020.107674] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 10/31/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022]
Abstract
Unconventional yeasts have attracted increased attentions owning to their unique biochemical properties and potential application in the biotechnological process. With the rapid development of microbial isolation tools and synthetic biology, more promising industrial yeasts have been isolated and characterized. Meyerozyma guilliermondii (anamorph Candida guilliermondii) is an ascomycetous yeast with several unique characteristics and physiology, such as the wide substrates spectrum and capability of various chemicals synthesis. The potential physiological and metabolic capabilities of M. guilliermondii, which can utilize various carbon sources including typical hydrophilic and hydrophobic materials were first reviewed in this review. Moreover, the wide applications of M. guilliermondii, such as for industrial enzymes production, metabolites synthesis and biocontrol were also reviewed. With the development of system and synthetic biology, M. guilliermondii will provide new opportunities for potential applications in biotechnology sectors in the future.
Collapse
Affiliation(s)
- Wei Yan
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China
| | - Hao Gao
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Xiujuan Qian
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China
| | - Yujia Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China
| | - Jie Zhou
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Weiliang Dong
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Fengxue Xin
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China.
| | - Wenming Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China
| | - Min Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, PR China; Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, PR China.
| |
Collapse
|
17
|
Frenkel M, Yunik Y, Fleker M, Blum SE, Sionov E, Elad D, Serhan H, Segal E. Fungi in sands of Mediterranean Sea beaches of Israel-Potential relevance to human health and well-being. Mycoses 2020; 63:1255-1261. [PMID: 32829491 DOI: 10.1111/myc.13144] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/12/2020] [Accepted: 07/13/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Sand of sea harbour bacteria that may cause enteric and other infections in humans, and are controlled by regulatory measures. Data on fungi in sea sand are scarce. Thus, an international group of mycologists was formed to explore fungal flora in sand of various waterbodies. OBJECTIVES The aim was to explore fungal sand contamination in beaches of the Israeli Mediterranean Sea Coast, regarding possible impact on human health in three aspects: (a) faecal contamination, as judged by presence of the human enteric fungi; (b) contamination by fungi, causing dermal infections; (c) and the presence of moulds, causing respiratory allergies and pose a risk for infection in immunocompromised individuals. METHODS The study included sand screen of six urban beaches from north to south of the Israeli Mediterranean Coast. Sand samples were extracted by water, and the water wash was cultured and quantitated. The fungi were identified phenotypically, by MALDI-TOF MS system and ITS sequencing. RESULTS The screen revealed that about 80% of the isolates were moulds and about 20% yeasts. The mould species included opportunistic pathogens and potential allergens: Aspergillus fumigatus, Fusarium and Mucorales species. Yeast isolates included Candida, Cryptococcus and Rhodotorula species. CONCLUSIONS (a) Fungi are contaminating Israeli Mediterranean sand beaches; (b) the contaminating fungi include various yeast and mould species; (c) some of the yeasts and mould species found in sand are known opportunistic pathogens, or respiratory allergens; (d) the data could serve as basis for initiating regulatory measures to control fungal contamination of sand for the benefit of public health.
Collapse
Affiliation(s)
- Michael Frenkel
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yaron Yunik
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Marcelo Fleker
- Department of Clinical Bacteriology and Mycology, The Kimron Veterinary Institute, Bet Dagan, Israel
| | - Shlomo E Blum
- Department of Clinical Bacteriology and Mycology, The Kimron Veterinary Institute, Bet Dagan, Israel
| | - Edward Sionov
- Institute for Postharvest and Food Sciences, Agricultural Research Organization, The Volcani Center, Rishon LeZion, Israel
| | - Daniel Elad
- Department of Clinical Bacteriology and Mycology, The Kimron Veterinary Institute, Bet Dagan, Israel
| | - Hanan Serhan
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Esther Segal
- Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| |
Collapse
|
18
|
Phylogeny, evolution, and potential ecological relationship of cytochrome CYP52 enzymes in Saccharomycetales yeasts. Sci Rep 2020; 10:10269. [PMID: 32581293 PMCID: PMC7314818 DOI: 10.1038/s41598-020-67200-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 05/07/2020] [Indexed: 01/16/2023] Open
Abstract
Cytochrome P450s from the CYP52 family participate in the assimilation of alkanes and fatty acids in fungi. In this work, the evolutionary history of a set of orthologous and paralogous CYP52 proteins from Saccharomycetales yeasts was inferred. Further, the phenotypic assimilation profiles were related with the distribution of cytochrome CYP52 members among species. The maximum likelihood phylogeny of CYP52 inferred proteins reveled a frequent ancient and modern duplication and loss events that generated orthologous and paralogous groups. Phylogeny and assimilation profiles of alkanes and fatty acids showed a family expansion in yeast isolated from hydrophobic-rich environments. Docking analysis of deduced ancient CYP52 proteins suggests that the most ancient function was the oxidation of C4-C11 alkanes, while the oxidation of >10 carbon alkanes and fatty acids is a derived character. The ancient CYP52 paralogs displayed partial specialization and promiscuous interaction with hydrophobic substrates. Additionally, functional optimization was not evident. Changes in the interaction of ancient CYP52 with different alkanes and fatty acids could be associated with modifications in spatial orientations of the amino acid residues that comprise the active site. The extended family of CYP52 proteins is likely evolving toward functional specialization, and certain redundancy for substrates is being maintained.
Collapse
|
19
|
Ristivojević P, Stević T, Starović M, Pavlović S, Özcan MM, Berić T, Dimkić I. Phenolic composition and biological activities of geographically different type of propolis and black cottonwood resins against oral streptococci, vaginal microbiota and phytopathogenic Fusarium species. J Appl Microbiol 2020; 129:296-310. [PMID: 32145138 DOI: 10.1111/jam.14633] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 02/23/2020] [Accepted: 02/28/2020] [Indexed: 01/27/2023]
Abstract
AIMS A multidisciplinary approach was used to compare phenolic composition, radical scavenging and antimicrobial activity of propolis samples from different geographical localities, and plant resin against various microorganisms. METHODS AND RESULTS Using UHPLC-qqqMS quantitative analysis, 28 phenolic compounds were determined. Caffeic and p-coumaric acids were identified as main phenolic acids in poplar propolis samples, except samples from Russia (P6) and China (P7). Radical scavenging activity (applying DPPH spectrophotometric assay) showed the highest activity of Serbian (40·51%) and Chinese (53·21%) propolis samples. Broth microdilution method was used for the oral cavity, fungal phytopathogenic and human vaginal isolates which have been identified at a molecular level. The most sensitive bacterial isolates were Lactobacillus acidophilus (MIC of 0·03-0·13 mg ml-1 ) and the oral streptococci isolates (MIC values of 0·19-0·13 mg ml-1 ). The most sensitive fungal phytopathogenic isolate was Fusarium oxysporum (MIC 0·003 mg ml-1 ). All samples, except propolis from Serbia (P4) and Turkey (P5), showed a strong antifungal activity against Fusarium sporotrichioides, Fusarium subglutinans and Fusarium proliferatum. CONCLUSION The results of various tests indicate good radical scavenging and antimicrobial activity against important human and plant pathogens. SIGNIFICANCE AND IMPACT OF THE STUDY A detailed propolis analysis is important when proposing a preparation of new biological antimicrobial products which have a positive impact on human health and reduce antibacterial resistance.
Collapse
Affiliation(s)
- P Ristivojević
- Faculty of Chemistry, University of Belgrade, Belgrade, Serbia
| | - T Stević
- Institute for Medicinal Plants Research "Dr Josif Pančić″, Belgrade, Serbia
| | - M Starović
- Institute for Plant Protection and Environment, University of Belgrade, Belgrade, Serbia
| | - S Pavlović
- Institute for Medicinal Plants Research "Dr Josif Pančić″, Belgrade, Serbia
| | - M M Özcan
- Faculty of Agriculture, Selçuk University, Konya, Turkey
| | - T Berić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - I Dimkić
- Faculty of Biology, University of Belgrade, Belgrade, Serbia
| |
Collapse
|
20
|
Nanosecond duration pulsed electric field together with formic acid triggers caspase-dependent apoptosis in pathogenic yeasts. Bioelectrochemistry 2019; 128:148-154. [DOI: 10.1016/j.bioelechem.2019.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 04/08/2019] [Accepted: 04/08/2019] [Indexed: 01/13/2023]
|
21
|
Navarro-Arias MJ, Hernández-Chávez MJ, García-Carnero LC, Amezcua-Hernández DG, Lozoya-Pérez NE, Estrada-Mata E, Martínez-Duncker I, Franco B, Mora-Montes HM. Differential recognition of Candida tropicalis, Candida guilliermondii, Candida krusei, and Candida auris by human innate immune cells. Infect Drug Resist 2019; 12:783-794. [PMID: 31040708 PMCID: PMC6459152 DOI: 10.2147/idr.s197531] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background The deep-seated infections caused by the Candida genus are associated with a high mortality rate, and Candida albicans is the most frequent species associated with these diseases. The fungal wall is composed of macromolecules not synthesized by the host, and therefore is a source of ligands recognized by innate immune cells. Methods We performed a comparative study analyzing the cell wall composition and organization of Candida tropicalis, Candida guilliermondii, Candida krusei, and Candida auris, along with their ability to stimulate cytokine production and phagocytosis by human innate immune cells. Results We found that the wall of these species had the basic components already described in C. albicans, with most of the chitin and b1,3-glucan located underneath the mannan layer. However, the walls of C. krusei and C. auris were rich in chitin and the former had a lower content of mannans. C. guilliermondii contained changes in the mannan and the b1,3-glucan levels. These species were differentially phagocytosed by human macrophages and stimulated cytokine production in a dectin-1-dependent pathway. C. krusei showed the most significant changes in the tested parameters, whereas C. auris behaved like C. albicans. Conclusion Our results suggest that the cell wall and innate immune recognition of C. tropicalis, C. guilliermondii, C. krusei, and Candida auris is different from that reported for C. albicans.
Collapse
Affiliation(s)
- María J Navarro-Arias
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Marco J Hernández-Chávez
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Laura C García-Carnero
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Diana G Amezcua-Hernández
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Nancy E Lozoya-Pérez
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Eine Estrada-Mata
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Iván Martínez-Duncker
- Laboratory of Human Glycobiology and Molecular Diagnostics, Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, 62209, Morelos, México
| | - Bernardo Franco
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| | - Héctor M Mora-Montes
- Department of Biology, División de Ciencias Naturales y Exactas, Campus Guanajuato, Universidad de Guanajuato, 36050, Guanajuato, Gto, México,
| |
Collapse
|
22
|
Taverna CG, Córdoba S, Vivot M, Szusz W, Vivot W, Bosco-Borgeat ME, Davel G. Reidentification and antifungal susceptibility profile of Candida guilliermondii and Candida famata clinical isolates from a culture collection in Argentina. Med Mycol 2019; 57:314-323. [PMID: 29955881 DOI: 10.1093/mmy/myy038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/21/2018] [Accepted: 05/15/2018] [Indexed: 01/17/2023] Open
Abstract
The aim of this work was to reidentify strains previously identified as Candida guilliermondii and Candida famata by conventional phenotypic methods conserved in a culture collection from Argentina using ribosomal DNA sequencing, ACT1 gene sequencing, and matrix-assisted laser desorption ionization - time of flight mass spectrometry (MALDI-TOF MS). In addition, we performed antifungal susceptibility tests of eight antifungal drugs commonly used in clinical treatment. We identified 68 isolates belonging to the Candida guilliermondii species complex (59 C. guilliermondii, 8 C. fermentati, and 1 Candida carpophila), 16 isolates belonging to the Candida famata species complex (8 C. famata, 6 Debaryomyces nepalensis, 1 Debaryomyces fabryi, and 1 Debaryomyces tyrocola). Although sequencing of ITS region was able to identify C. guilliermondii and D. nepalensis isolates, sequencing of ACT1 gene seems to be the most appropriate technique for differentiation between C. fermentati and C. carpophila and between members of the C. famata species complex others than D. nepalensis. MALDI-TOF MS has a good potential for the identification of these yeasts, particularly in clinical laboratories since is a rapid and easy to perform technique. Here, we report the first isolation of D. tyrocola from a human patient and the first isolation of D. nepalensis from lungs and blood of human patients. Finally, correct identification and determination of antifungal susceptibility of those closely related species could be a useful tool for clinicians to choose the most effective antifungal treatment.
Collapse
Affiliation(s)
- Constanza Giselle Taverna
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| | - Susana Córdoba
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| | - Matías Vivot
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| | - Wanda Szusz
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| | - Walter Vivot
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| | - María Eugenia Bosco-Borgeat
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| | - Graciela Davel
- Departamento Micología, Instituto Nacional de Enfermedades Infecciosas "Dr. Carlos G. Malbrán," Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
23
|
Frequency of Uncommon Clinical Yeast Species Confirmed by ITS-Sequencing. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2019. [DOI: 10.5812/archcid.62816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
24
|
Zajc J, Gostinčar C, Černoša A, Gunde-Cimerman N. Stress-Tolerant Yeasts: Opportunistic Pathogenicity Versus Biocontrol Potential. Genes (Basel) 2019; 10:genes10010042. [PMID: 30646593 PMCID: PMC6357073 DOI: 10.3390/genes10010042] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/03/2019] [Accepted: 01/09/2019] [Indexed: 01/26/2023] Open
Abstract
Stress-tolerant fungi that can thrive under various environmental extremes are highly desirable for their application to biological control, as an alternative to chemicals for pest management. However, in fungi, the mechanisms of stress tolerance might also have roles in mammal opportunism. We tested five species with high biocontrol potential in agriculture (Aureobasidium pullulans, Debayomyces hansenii, Meyerozyma guilliermondii, Metschnikowia fructicola, Rhodotorula mucilaginosa) and two species recognized as emerging opportunistic human pathogens (Exophiala dermatitidis, Aureobasidium melanogenum) for growth under oligotrophic conditions and at 37 °C, and for tolerance to oxidative stress, formation of biofilms, production of hydrolytic enzymes and siderophores, and use of hydrocarbons as sole carbon source. The results show large overlap between traits desirable for biocontrol and traits linked to opportunism (growth under oligotrophic conditions, production of siderophores, high oxidative stress tolerance, and specific enzyme activities). Based on existing knowledge and these data, we suggest that oligotrophism and thermotolerance together with siderophore production at 37 °C, urease activity, melanization, and biofilm production are the main traits that increase the potential for fungi to cause opportunistic infections in mammals. These traits should be carefully considered when assessing safety of potential biocontrol agents.
Collapse
Affiliation(s)
- Janja Zajc
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, SI-1000 Ljubljana, Slovenia.
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| | - Cene Gostinčar
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
- Institut 'Jožef Stefan', Jamova cesta 39, SI-1000 Ljubljana, Slovenia.
| | - Anja Černoša
- Department of Biotechnology and Systems Biology, National Institute of Biology, Večna pot 111, SI-1000 Ljubljana, Slovenia.
| | - Nina Gunde-Cimerman
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia.
| |
Collapse
|
25
|
Candida sp. Infections in Patients with Diabetes Mellitus. J Clin Med 2019; 8:jcm8010076. [PMID: 30634716 PMCID: PMC6352194 DOI: 10.3390/jcm8010076] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 12/27/2018] [Accepted: 01/03/2019] [Indexed: 02/07/2023] Open
Abstract
Candidiasis has increased substantially worldwide over recent decades and is a significant cause of morbidity and mortality, especially among critically ill patients. Diabetes mellitus (DM) is a metabolic disorder that predisposes individuals to fungal infections, including those related to Candida sp., due to a immunosuppressive effect on the patient. This review aims to discuss the latest studies regarding the occurrence of candidiasis on DM patients and the pathophysiology and etiology associated with these co-morbidities. A comprehensive review of the literature was undertaken. PubMed, Scopus, Elsevier’s ScienceDirect, and Springer’s SpringerLink databases were searched using well-defined search terms. Predefined inclusion and exclusion criteria were applied to classify relevant manuscripts. Results of the review show that DM patients have an increased susceptibility to Candida sp. infections which aggravates in the cases of uncontrolled hyperglycemia. The conclusion is that, for these patients, the hospitalization periods have increased and are commonly associated with the prolonged use of indwelling medical devices, which also increase the costs associated with disease management.
Collapse
|
26
|
Wang T, Shao J, Da W, Li Q, Shi G, Wu D, Wang C. Strong Synergism of Palmatine and Fluconazole/Itraconazole Against Planktonic and Biofilm Cells of Candida Species and Efflux-Associated Antifungal Mechanism. Front Microbiol 2018; 9:2892. [PMID: 30559726 PMCID: PMC6287112 DOI: 10.3389/fmicb.2018.02892] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 11/12/2018] [Indexed: 01/13/2023] Open
Abstract
Fungal infections caused by Candida albicans and non-albicans Candida [NAC] species are becoming a growing threat in immunodeficient population, people with long-term antibiotic treatment and patients enduring kinds of catheter intervention. The resistance to one or more than one conventional antifungal agents contributes greatly to the widespread propagation of Candida infections. The severity of fungal infection requires the discovery of novel antimycotics and the extensive application of combination strategy. In this study, a group of Candida standard and clinical strains including C. albicans as well as several NAC species were employed to evaluate the antifungal potentials of palmatine (PAL) alone and in combination with fluconazole (FLC)/itraconazole (ITR) by microdilution method, checkerboard assay, gram staining, spot assay, and rhodamine 6G efflux test. Subsequently, the expressions of transporter-related genes, namely CDR1, CDR2, MDR1, and FLU1 for C. albicans, CDR1 and MDR1 for Candida tropicalis and Candida parapsilosis, ABC1 and ABC2 for Candida krusei, CDR1, CDR2, and SNQ2 for Candida glabrata were analyzed by qRT-PCR. The susceptibility test showed that PAL presented strong synergism with FLC and ITR with fractional inhibitory concentration index (FICI) in a range of 0.0049-0.75 for PAL+FLC and 0.0059-0.3125 for PAL+ITR in planktonic cells, 0.125-0.375 for PAL+FLC and 0.0938-0.3125 for PAL+ITR in biofilms. The susceptibility results were also confirmed by gram staining and spot assay. After combinations, a vast quantity of rhodamine 6G could not be pumped out as considerably intracellular red fluorescence was accumulated. Meanwhile, the expressions of efflux-associated genes were evaluated and presented varying degrees of inhibition. These results indicated that PAL was a decent antifungal synergist to promote the antifungal efficacy of azoles (such as FLC and ITR), and the underlying antifungal mechanism might be linked with the inhibition of efflux pumps and the elevation of intracellular drug content.
Collapse
Affiliation(s)
- Tianming Wang
- Laboratory of Biochemistry and Molecular Biology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| | - Jing Shao
- Laboratory of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| | - Wenyue Da
- Laboratory of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| | - Qianqian Li
- Laboratory of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| | - Gaoxiang Shi
- Laboratory of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| | - Daqiang Wu
- Laboratory of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| | - Changzhong Wang
- Laboratory of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China
| |
Collapse
|
27
|
In Vitro Activity of Isavuconazole against Opportunistic Fungal Pathogens from Two Mycology Reference Laboratories. Antimicrob Agents Chemother 2018; 62:AAC.01230-18. [PMID: 30061288 PMCID: PMC6153788 DOI: 10.1128/aac.01230-18] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 07/19/2018] [Indexed: 12/21/2022] Open
Abstract
Monitoring antifungal susceptibility patterns for new and established antifungal agents seems prudent given the increasing prevalence of uncommon species associated with higher antifungal resistance. We evaluated the activity of isavuconazole against 4,856 invasive yeasts and molds collected worldwide. The 4,856 clinical fungal isolates, including 2,351 Candida species isolates, 97 non-Candida yeasts, 1,972 Aspergillus species isolates, and 361 non-Aspergillus molds, including 292 Mucorales isolates collected in 2015 to 2016, were tested using CLSI methods. The MIC values for isavuconazole versus Aspergillus ranged from 0.06 to ≥16 μg/ml. The modal MIC for isavuconazole was 0.5 μg/ml (range, 0.25 [A. nidulans and A. terreus species complex] to 4 μg/ml [A. calidoustus and A. tubingensis]). Eight A. fumigatus isolates had elevated isavuconazole MIC values at ≥8 μg/ml (non-wild type). Isavuconazole showed comparable activity to itraconazole against the Mucorales The lowest modal isavuconazole MIC values were seen for Rhizopus spp., R. arrhizus var. arrhizus, and R. microsporus (all 1 μg/ml). Candida species isolates were inhibited by ≤0.25 μg/ml of isavuconazole (range, 96.1% [C. lusitaniae] to 100.0% [C. albicans, C. dubliniensis, C. kefyr, and C. orthopsilosis]). MIC values were ≤1 μg/ml for 95.5% of C. glabrata isolates and 100.0% of C. krusei isolates. Isavuconazole was active against the non-Candida yeasts, including Cryptococcus neoformans (100.0% at ≤0.5 μg/ml). Isavuconazole exhibited excellent activity against most species of Candida and Aspergillus Isavuconazole was comparable to posaconazole and voriconazole against the less common yeasts and molds. Isavuconazole was generally less active than posaconazole and more active than voriconazole against the 292 Mucorales isolates. We confirm the potentially useful activity of isavuconazole against species of Rhizopus as determined by CLSI methods.
Collapse
|
28
|
Abstract
PURPOSE OF REVIEW To describe the epidemiology, strategies for early detection, and clinical management of infections caused by the most commonly found multidrug-resistant (MDR) Candida spp. RECENT FINDINGS Increasing numbers of reports describing invasive infections by MDR Candida auris and Candida glabrata has been reported in medical centers worldwide. SUMMARY We checked all papers published along the last 10 years describing epidemiological, diagnostic, and clinical aspects of infections by MDR Candida spp., with emphasis on C. auris and C. glabrata spp. C. auris has been reported in 15 countries and multidrug resistance rates is usually above 30%. Horizontal transmission is a great concern regarding C. auris. C. glabrata ranks the second most reported Candida spp. in deep-seated infections from United States and some European Centers, although multidrug resistance rates above 10% are restricted to some US centers. Candida haemulonii complex isolates with poor susceptibility to azoles and amphotericin B have been isolated in superficial and deep-seated infections, whereas Candida guilliiermondii complex isolates with poor susceptibility to azoles and echinocandins have been recovered from catheter-related bloodstream infections. Other potential MDR Candida species are Candida krusei, Candida lusitaniae, Candida kefyr, Yarrowia (Candida) lypolitica, and Candida rugosa.
Collapse
|
29
|
Mazari W, Boucherit-Otmani Z, El Haci IA, Ilahi A, Boucherit K. Risk assessment for the spread of Candida sp. in dental chair unit waterlines using molecular techniques. Int Dent J 2018; 68:386-392. [PMID: 29729017 DOI: 10.1111/idj.12401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIMS The aim of this study was to evaluate the presence of yeasts in dental chair unit waterlines (DCUWLs) and to test their ability to form biofilms. MATERIALS AND METHODS Eighteen dental waterlines were analysed by culture in liquid Sabouraud in order to allow the quantification and the purification of isolated yeasts from their internal surfaces. All isolates were identified by standard laboratory procedures, including CHROMagar Candida medium for orientation, commercial yeast identification system Api Candida, MALDI-TOF MS and DNA sequencing. To evaluate their kinetics of antifungal susceptibility during different phases of biofilm formation, these yeasts were subjected to three antifungal agents. RESULTS From the 18 DCUWLs studied, 10 were altered (55.56%). Eleven strains of Candida sp. [Candida albicans (2), Candida guilliermondii (5) and Candida glabrata (4)] and two species of non-Candida; Rhodotorula spp. (1) and Trichosporon spp. (2) were identified. The majority of yeasts in planktonic form were susceptible to amphotericin B, caspofungin and voriconazole, except C. albicans was resistant to voriconazole. In the biofilm form, caspofungin was the most effective antifungal agent for all isolated strains. For the other antifungal agents, sessile cells were resistant. CONCLUSION Several types of yeasts were identified; the most frequently isolated genus was Candida. The majority of these yeasts had the ability to form biofilms and resisted antifungal agents used in this study.
Collapse
Affiliation(s)
- Wissame Mazari
- Laboratoire Antibiotiques Antifongiques: Physico-Chimique, Synthèse et Activité Biologique, Département de Biologie, Université Abou Bekr Belkaid, Tlemcen, Algérie.,Laboratoire de Mycologie Médicale, Hôpital de la Timone, Université Aix-Marseille, Marseille, France
| | - Zahia Boucherit-Otmani
- Laboratoire Antibiotiques Antifongiques: Physico-Chimique, Synthèse et Activité Biologique, Département de Biologie, Université Abou Bekr Belkaid, Tlemcen, Algérie
| | - Imad Abdelhamid El Haci
- Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, CRAPC, Tipaza, Algérie
| | - Amine Ilahi
- Laboratoire de Mycologie Médicale, Hôpital de la Timone, Université Aix-Marseille, Marseille, France
| | - Kebir Boucherit
- Centre Universitaire Elhadj Bouchaïb, Ain Témouchent, Algérie
| |
Collapse
|
30
|
Ando A, Hagiya H, Nada T, Kimura K, Waseda K, Rai K, Hanayama Y, Otsuka F. Hypersensitivity Pneumonitis Caused by a Home Ultrasonic Humidifier Contaminated with Candida guilliermondii. Intern Med 2017; 56:3109-3112. [PMID: 28943587 PMCID: PMC5725870 DOI: 10.2169/internalmedicine.9055-17] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We herein report the first documented case of acute hypersensitivity pneumonitis in which Candida guilliermondii was the possible causative organism. A young Japanese woman presented to our hospital with relapsing respiratory symptoms accompanied by high fever. A detailed interview revealed that the onset of the symptoms occurred shortly after using a humidifier in her home. Her symptoms showed spontaneous improvement soon after admission, and an examination of her bronchoalveolar lavage fluid revealed the specific infiltration of inflammatory cells, which predominantly consisted of lymphocytes. Precipitin testing showed a positive reaction to C. guilliermondii, which was isolated from the home humidifier. Repeated history taking is essential for diagnosing occult respiratory disorders.
Collapse
Affiliation(s)
- Akemi Ando
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Hideharu Hagiya
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
- Department of Infection Control and Prevention, Osaka University Graduate School of Medicine, Japan
| | - Takahiro Nada
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Kosuke Kimura
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Koichi Waseda
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Kammei Rai
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
- Department of Allergy and Respiratory Medicine, Okayama University Hospital, Japan
| | - Yoshihisa Hanayama
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| | - Fumio Otsuka
- Department of General Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Japan
| |
Collapse
|
31
|
Bacterial and fungal biodeterioration of discolored building paints in Lagos, Nigeria. World J Microbiol Biotechnol 2017; 33:196. [DOI: 10.1007/s11274-017-2362-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 09/27/2017] [Indexed: 02/05/2023]
|
32
|
Navarro-Arias MJ, Dementhon K, Defosse TA, Foureau E, Courdavault V, Clastre M, Le Gal S, Nevez G, Le Govic Y, Bouchara JP, Giglioli-Guivarc'h N, Noël T, Mora-Montes HM, Papon N. Group X hybrid histidine kinase Chk1 is dispensable for stress adaptation, host–pathogen interactions and virulence in the opportunistic yeast Candida guilliermondii. Res Microbiol 2017; 168:644-654. [DOI: 10.1016/j.resmic.2017.04.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Revised: 03/03/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022]
|
33
|
Liu WL, Lai CC, Li MC, Wu CJ, Ko WC, Hung YL, Tang HJ, Hsueh PR. Clinical manifestations of candidemia caused by uncommon Candida species and antifungal susceptibility of the isolates in a regional hospital in Taiwan, 2007-2014. JOURNAL OF MICROBIOLOGY, IMMUNOLOGY, AND INFECTION = WEI MIAN YU GAN RAN ZA ZHI 2017; 52:612-619. [PMID: 28886952 DOI: 10.1016/j.jmii.2017.08.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/09/2017] [Accepted: 08/09/2017] [Indexed: 12/20/2022]
Abstract
OBJECTIVE This retrospective study investigated clinical manifestations of candidemia caused by uncommon Candida species and antifungal susceptibility of the isolates in a regional hospital in Taiwan. METHODS The uncommon Candida species was initially defined as Candida species other than C. albicans, C. tropicalis, C. glabrata complex, C. parapsilosis complex and C. krusei. All uncommon Candida isolates were identified and confirmed by molecular methods. In vitro susceptibility testing of the uncommon Candida species to nine antifungal agents was conducted using the broth microdilution method with the Sensititre YeastOne (SYO) system (Trek Diagnostic Systems, Ltd., East Grimstead, UK). RESULTS Twenty-one patients, comprising 11 males and 10 females with a median age of 69 years, were recruited. Cancer (n = 11) was the most common underlying disease, 19 (90.5%) cases had prior antibiotic exposure, and only two patients had prior antifungal use. The overall in-hospital mortality rate was 38.1% (n = 8). C. guilliermondii (n = 11) was the most common pathogen, followed by C. curvata (n = 3). C. guilliermondii isolates exhibited relatively high rates of azole minimum inhibitory concentrations (MICs) above epidemiological cut-off values (ECVs), whereas C. pelliculosa and C. lusitaniae isolates all remained susceptible to azoles. All three C. curvata isolates had high caspofungin (>8 mg/L) and fluconazole MICs (8 mg/L) and could be defined as multidrug-resistant. CONCLUSIONS Uncommon Candida species frequently exhibit high rates of non-susceptibility to antifungals. Identification of all Candida isolates at the species level from blood samples is of value for treatment.
Collapse
Affiliation(s)
- Wei-Lun Liu
- Department of Emergency and Critical Care Medicine, Fu Jen Catholic University Hospital, New Taipei, Taiwan; College of Medicine, Fu Jen Catholic University, New Taipei, Taiwan
| | - Chih-Cheng Lai
- Department of Intensive Care Medicine, Chi Mei Medical Center, Liouying, Tainan, Taiwan
| | - Ming-Chi Li
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Center for Infection Control, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Chi-Jung Wu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Tainan, Taiwan
| | - Wen-Chien Ko
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Center for Infection Control, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Yi-Li Hung
- Department of Intensive Care Medicine, Chi Mei Medical Center, Liouying, Tainan, Taiwan; Department of Pediatrics, Cathay General Hospital, Taipei, Taiwan
| | - Hung-Jen Tang
- Department of Internal Medicine, Chi Mei Medical Center, Tainan, Taiwan; Department of Health and Nutrition, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
| | - Po-Ren Hsueh
- Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
| |
Collapse
|
34
|
The identification of Meyerozyma guilliermondii from blood cultures and surveillance samples in a university hospital in Northeast Turkey: A ten-year survey. J Mycol Med 2017; 27:506-513. [PMID: 28843335 DOI: 10.1016/j.mycmed.2017.07.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 07/06/2017] [Accepted: 07/17/2017] [Indexed: 11/24/2022]
Abstract
Meyerozyma (Pichia) guilliermondii exists in human skin and mucosal surface microflora. It can cause severe fungal infections like candidemia, which is an opportunistic pathogen. One hundred and forty-one M. guilliermondii isolates, consisting of 122 blood culture isolates, belonging to 126 patients; 13 total parenteral nutrition solution isolates; and two rectal swab isolates were identified according to carbohydrate assimilation reactions in a university hospital in Turkey between January 2006 and December 2015. Following Candida albicans (34.0%) and C. parapsilosis (21.2%), the third yeast species most commonly isolated from blood cultures in the Farabi Hospital was M. guilliermondii (20.6%). The patients were hospitalised in 27 different departments. A total of 50% of the patients were in pediatric departments, 49.2% were in intensive care units, and 17.2% were in haematology-oncology departments. Molecular identification of the isolates was performed using DNA sequence analysis of ribosomal ITS gene regions and IGS amplification-AluI fingerprinting (IGSAF). With molecular identification, 140 isolates were identified as M. guilliermondii and one isolate was identified as Candida membranifaciens. It was observed that the ITS1 region specifically helps in identifying these species. It was demonstrated that biochemical and molecular methods were 99.3% consistent in identifying M. guilliermondii. The Wild-Type (WT) Minimum Inhibitory Concentrations (MICs) distribution of fluconazole, voriconazole, itraconazole, and flucytosine were determined using the Sensititre YeastOne YO2V system after 24h of incubation. One M. guilliermondii strain was determined to be non-WT for fluconazole, voriconazole, itraconazole and flucytosine. In total, three M. guilliermondii strains, for fluconazole, were determined to be non-WT in this study.
Collapse
|
35
|
Candida guilliermondii Complex Is Characterized by High Antifungal Resistance but Low Mortality in 22 Cases of Candidemia. Antimicrob Agents Chemother 2017; 61:AAC.00099-17. [PMID: 28438935 DOI: 10.1128/aac.00099-17] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 04/14/2017] [Indexed: 12/22/2022] Open
Abstract
The objectives of our study were to describe the characteristics of patients with Candida guilliermondii candidemia and to perform an in-depth microbiological characterization of isolates and compare them with those of patients with C. albicans candidemia. We described the risk factors and outcomes of 22 patients with candidemia caused by the C. guilliermondii complex. Incident isolates were identified using molecular techniques, and susceptibility to fluconazole, anidulafungin, and micafungin was studied. Biofilm formation was measured using the crystal violet assay (biomass production) and the XTT reduction assay (metabolic activity), and virulence was studied using the Galleria mellonella model. Biofilm formation was compared with that observed for C. albicans The main conditions predisposing to infection were malignancy (68%), immunosuppressive therapy (59%), and neutropenia (18%). Clinical presentation of candidemia was less severe in patients infected by the C. guilliermondii complex than in patients infected by C. albicans, and 30-day mortality was lower in C. guilliermondii patients (13.6% versus 33.9%, respectively; P = 0.049). Isolates were identified as C. guilliermondiisensu stricto (n = 17) and Candida fermentati (n = 5). The isolates produced biofilms with low metabolic activity and moderate biomass. The G. mellonella model showed that C. guilliermondii was less virulent than C. albicans (mean of 6 days versus 1 day of survival, respectively; P < 0.001). Patients with candidemia caused by the C. guilliermondii complex had severe and debilitating underlying conditions. Overall, the isolates showed diminished susceptibility to fluconazole and echinocandins, although poor biofilm formation and the low virulence were associated with a favorable outcome.
Collapse
|
36
|
Cheng JW, Liao K, Kudinha T, Yu SY, Xiao M, Wang H, Kong F, Xu YC. Molecular epidemiology and azole resistance mechanism study of Candida guilliermondii from a Chinese surveillance system. Sci Rep 2017; 7:907. [PMID: 28424474 PMCID: PMC5430413 DOI: 10.1038/s41598-017-01106-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/16/2017] [Indexed: 11/09/2022] Open
Abstract
We studied the molecular epidemiology and mechanism of azole resistance of 164 C. guilliermondii isolates from a nationwide multi-center surveillance program. The isolates were identified by ITS gene sequencing, and the in vitro susceptibility to fluconazole and voriconazole was determined by broth microdilution method. The 14-α-demethylase gene ERG11 was amplified and sequenced, and microsatellite analysis was performed to study the genetic relatedness of the isolates. Amongst the 164 C. guilliermondii isolates, 15 (9.1%) and 17 (10.4%) isolates were assigned to be non-wild type (non-WT) to fluconazole and voriconazole, respectively. Sixteen sequence types (STs) were detected by comparing the amino acid sequence polymorphisms of the ERG11 gene. Fifteen isolates of STs 9, 10, 12, 13, 14, 15 and 16, were all assigned to be non-WT to fluconazole and voriconazole. By microsatellite analysis, 40 different genotypes were identified. Thirty-seven isolates from one hospital (Z1) shared the same ERG11 sequence type (ST 2), microsatellite genotype (PU40) and drug resistance pattern. In conclusion, this is the first molecular epidemiology study of C. guilliermondii in China. The rate of non-WT isolates to azoles was high and the accurate contribution of ERG11 gene mutations to azole resistance need be confirmed by further studies.
Collapse
Affiliation(s)
- Jing-Wei Cheng
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases, Beijing, 100730, China
| | - Kang Liao
- Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, 510080, China
| | - Timothy Kudinha
- The Charles Sturt University, Leeds Parade, Orange, New South Wales, 2687, Australia.,Centre for Infectious Diseases and Microbiology Laboratory Services, Westmead Hospital, Westmead, New South Wales, 2145, Australia
| | - Shu-Ying Yu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases, Beijing, 100730, China
| | - Meng Xiao
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases, Beijing, 100730, China
| | - He Wang
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, China.,Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases, Beijing, 100730, China
| | - Fanrong Kong
- The Charles Sturt University, Leeds Parade, Orange, New South Wales, 2687, Australia
| | - Ying-Chun Xu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730, China. .,Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730, China. .,Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases, Beijing, 100730, China.
| |
Collapse
|
37
|
Navarro-Arias MJ, Defosse TA, Dementhon K, Csonka K, Mellado-Mojica E, Dias Valério A, González-Hernández RJ, Courdavault V, Clastre M, Hernández NV, Pérez-García LA, Singh DK, Vizler C, Gácser A, Almeida RS, Noël T, López MG, Papon N, Mora-Montes HM. Disruption of Protein Mannosylation Affects Candida guilliermondii Cell Wall, Immune Sensing, and Virulence. Front Microbiol 2016; 7:1951. [PMID: 27994582 PMCID: PMC5133257 DOI: 10.3389/fmicb.2016.01951] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 11/21/2016] [Indexed: 11/13/2022] Open
Abstract
The fungal cell wall contains glycoproteins that interact with the host immune system. In the prominent pathogenic yeast Candida albicans, Pmr1 acts as a Golgi-resident ion pump that provides cofactors to mannosyltransferases, regulating the synthesis of mannans attached to glycoproteins. To gain insight into a putative conservation of such a crucial process within opportunistic yeasts, we were particularly interested in studying the role of the PMR1 homolog in a low-virulent species that rarely causes candidiasis, Candida guilliermondii. We disrupted C. guilliermondii PMR1 and found that loss of Pmr1 affected cell growth and morphology, biofilm formation, susceptibility to cell wall perturbing agents, mannan levels, and the wall composition and organization. Despite the significant increment in the amount of β1,3-glucan exposed at the wall surface, this positively influenced only the ability of the mutant to stimulate IL-10 production by human monocytes, suggesting that recognition of both mannan and β1,3-glucan, is required to stimulate strong levels of pro-inflammatory cytokines. Accordingly, our results indicate C. guilliermondii sensing by monocytes was critically dependent on the recognition of N-linked mannans and β1,3-glucan, as reported in other Candida species. In addition, chemical remotion of cell wall O-linked mannans was found to positively influence the recognition of C. guilliermondii by human monocytes, suggesting that O-linked mannans mask other cell wall components from immune cells. This observation contrasts with that reported in C. albicans. Finally, mice infected with C. guilliermondii pmr1Δ null mutant cells had significantly lower fungal burdens compared to animals challenged with the parental strain. Accordingly, the null mutant showed inability to kill larvae in the Galleria mellonella infection model. This study thus demonstrates that mannans are relevant for the C. guilliermondii-host interaction, with an atypical role for O-linked mannans.
Collapse
Affiliation(s)
- María J Navarro-Arias
- División de Ciencias Naturales y Exactas, Departamento de Biología, Universidad de Guanajuato Guanajuato, Mexico
| | - Tatiana A Defosse
- Biomolécules et Biotechnologies Végétales, Université François-Rabelais de ToursTours, France; Groupe d'Etude des Interactions Hôte-Pathogène, Université d'AngersAngers, France
| | - Karine Dementhon
- Laboratoire de Microbiologie Fondamentale et Pathogénicité, Université Bordeaux 2, UMR-Centre National de la Recherche Scientifique 5234 Bordeaux, France
| | - Katalin Csonka
- Department of Microbiology, University of Szeged Szeged, Hungary
| | - Erika Mellado-Mojica
- Centro de Investigaciones y de Estudios Avanzados del Instituto Politécnico Nacional (IPN) Guanajuato, Mexico
| | - Aline Dias Valério
- Departamento de Microbiologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina Londrina, Brazil
| | - Roberto J González-Hernández
- División de Ciencias Naturales y Exactas, Departamento de Biología, Universidad de Guanajuato Guanajuato, Mexico
| | - Vincent Courdavault
- Biomolécules et Biotechnologies Végétales, Université François-Rabelais de Tours Tours, France
| | - Marc Clastre
- Biomolécules et Biotechnologies Végétales, Université François-Rabelais de Tours Tours, France
| | - Nahúm V Hernández
- División de Ciencias Naturales y Exactas, Departamento de Biología, Universidad de Guanajuato Guanajuato, Mexico
| | - Luis A Pérez-García
- División de Ciencias Naturales y Exactas, Departamento de Biología, Universidad de Guanajuato Guanajuato, Mexico
| | | | - Csaba Vizler
- Institute of Biochemistry, Biological Research Center of the Hungarian Academy of Sciences Szeged, Hungary
| | - Attila Gácser
- Department of Microbiology, University of Szeged Szeged, Hungary
| | - Ricardo S Almeida
- Departamento de Microbiologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina Londrina, Brazil
| | - Thierry Noël
- Laboratoire de Microbiologie Fondamentale et Pathogénicité, Université Bordeaux 2, UMR-Centre National de la Recherche Scientifique 5234 Bordeaux, France
| | - Mercedes G López
- Centro de Investigaciones y de Estudios Avanzados del Instituto Politécnico Nacional (IPN) Guanajuato, Mexico
| | - Nicolas Papon
- Groupe d'Etude des Interactions Hôte-Pathogène, Université d'Angers Angers, France
| | - Héctor M Mora-Montes
- División de Ciencias Naturales y Exactas, Departamento de Biología, Universidad de Guanajuato Guanajuato, Mexico
| |
Collapse
|
38
|
Bufalari A, Maggio C, Moretti G, Crovace A, Stefanetti V, Straubinger RK, Passamonti F. Management of Candida guilliermondii joint infection in a dog. Acta Vet Scand 2016; 58:47. [PMID: 27391227 PMCID: PMC4938898 DOI: 10.1186/s13028-016-0227-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 06/30/2016] [Indexed: 11/10/2022] Open
Abstract
Background Candida spp. are dimorphic fungi in the family Cryptococcaceae. Infections with Candida spp. are usually rare conditions in dogs, but immunocompromised patients have a higher risk for developing invasive candidal infections. Case presentation A 5-year-old male Boxer, positive to Leishmania infantum, was referred to the Veterinary Teaching Hospital of the Department of Veterinary Medicine, University of Perugia, Italy for examination of a non-weight bearing left hind limb lameness of a duration of at least 3 months. During this period, treatment involved systemic anti-inflammatory medications and intra-articular corticosteroid administration. On presentation, clinical examination and radiographic findings were suggestive of cranial cruciate ligament deficiency. To support this diagnosis a stifle arthroscopy was performed: it confirmed a partial rupture of cranial cruciate ligament. Samples culture of synovial fluid and membrane was routinely collected as well, and revealed Candida guilliermondii joint infection. Treatment for the C. guilliermondii joint infection involved systemic anti-fungal therapy, joint lavage and intra-articular administration of antifungal drugs. Lameness improved markedly during this treatment, but lameness did not resolve completely, probably due to cranial cruciate ligament deficiency. Tibial tuberosity advancement (TTA) was chosen in order to treat stifle instability and was performed 4 weeks following cessation of treatment of the C. guilliermondii joint infection. Six month after TTA the dog showed a completely recovery with no lameness. Conclusions To the authors’ knowledge, this is the first case of Candida spp. joint infection reported in dogs. The cause of the progression of the joint C. guilliermondii infection remains unclear but it may be associated with leishmaniasis or intra-articular corticosteroid injections. Treatment with systemic and intra-articular anti-fungal therapies was successful. In the evaluation of hind limb lameness in a chronically immunocompromised dog, it would be advisable to consider also an intra-articular Candida spp. infection.
Collapse
|
39
|
Shi L, Luo M, Chen WR, Hu C, Zhang G, Zhang F, Chen J, Mo X, Cai Q, Yang L, Wang X. In situ photoimmunotherapy for cutaneous granuloma caused by itraconazole-resistant Candida guilliermondii. Dermatol Ther 2016; 29:353-357. [PMID: 27328828 DOI: 10.1111/dth.12376] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Cutaneous granulomas caused by Candida guilliermondii are difficult to cure. In situ photoimmunotherapy (ISPI) is a novel method composed of local photothermal therapy and immunoadjuvant. In this study, ISPI was used the first time clinically for cutaneous granuloma caused by itraconazole-resistant C.guilliermondii. A 10-week cycle of ISPI was composed of (1) 5% imiquimod applied topically every other day and (2) irradiation of lesions with an 808-nm diode laser at Days 14, 28, 42, and 56. Here we report our first case. A patient was treated with ISPI for four cycles. After the treatment, the lesions were eliminated without recurrence during a 12-month follow-up. Our results demonstrate that ISPI can be used as an effective treatment modality for cutaneous fungal granuloma.
Collapse
Affiliation(s)
- Lei Shi
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Min Luo
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Wei R Chen
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China.,Biophotonics Research Laboratory, Center for Interdisciplinary Biomedical Education and Research, University of Central Oklahoma, Edmond, Oklahoma, USA
| | - Chan Hu
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Guolong Zhang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Fuhe Zhang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Jia Chen
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Xiaohui Mo
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Qing Cai
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China
| | - Lianjuan Yang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China.
| | - Xiuli Wang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai, P. R. China.
| |
Collapse
|
40
|
Identification and Antifungal Susceptibility Profile of Candida guilliermondii and Candida fermentati from a Multicenter Study in China. J Clin Microbiol 2016; 54:2187-9. [PMID: 27252461 DOI: 10.1128/jcm.00938-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 05/25/2016] [Indexed: 12/26/2022] Open
Abstract
With molecular sequencing as a gold standard, the Vitek MS, Bruker Biotyper MS, and Vitek-2 Compact systems correctly identified 92.7%, 97.0%, and 15.2% of 164 Candida guillermondii isolates, respectively, and none of 8 C. fermentati isolates. All of the isolates showed high susceptibility to echinocandins, but some C. guilliermondii isolates showed low azole susceptibility.
Collapse
|
41
|
Jung DS, Farmakiotis D, Jiang Y, Tarrand JJ, Kontoyiannis DP. Uncommon Candida Species Fungemia among Cancer Patients, Houston, Texas, USA. Emerg Infect Dis 2016; 21:1942-50. [PMID: 26488845 PMCID: PMC4625381 DOI: 10.3201/eid2111.150404] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Many uncommon Candida species that cause bloodstream infections (BSIs) are not well-characterized. We investigated the epidemiology, antifungal use, susceptibility patterns, and factors associated with all-cause death among cancer patients in whom uncommon Candida spp. BSIs were diagnosed at a cancer treatment center during January 1998–September 2013. Of 1,395 Candida bloodstream isolates, 79 from 68 patients were uncommon Candida spp. The incidence density of uncommon Candida spp. BSIs and their proportion to all candidemia episodes substantively increased during the study period, and the rise was associated with increasing use of echinocandin antifungal drugs. Thirty-seven patients had breakthrough infections during therapy or prophylaxis with various systemic antifungal drugs for >7 consecutive days; 21 were receiving an echinocandin. C. kefyr (82%), and C. lusitaniae (21%) isolates frequently showed caspofungin MICs above the epidemiologic cutoff values. These findings support the need for institutional surveillance for uncommon Candida spp. among cancer patients.
Collapse
|
42
|
Brilhante RSN, Paiva MAN, Sampaio CMS, Castelo-Branco DSCM, Teixeira CEC, de Alencar LP, Bandeira TJPG, Monteiro AJ, Cordeiro RA, Pereira-Neto WA, Sidrim JJC, Moreira JLB, Rocha MFG. Azole resistance in Candida spp. isolated from Catú Lake, Ceará, Brazil: an efflux-pump-mediated mechanism. Braz J Microbiol 2016; 47:33-8. [PMID: 26887224 PMCID: PMC4822745 DOI: 10.1016/j.bjm.2015.11.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Accepted: 05/29/2015] [Indexed: 11/21/2022] Open
Abstract
Since, there is no study reporting the mechanism of azole resistance among yeasts isolated from aquatic environments; the present study aims to investigate the occurrence of antifungal resistance among yeasts isolated from an aquatic environment, and assess the efflux-pump activity of the azole-resistant strains to better understand the mechanism of resistance for this group of drugs. For this purpose, monthly water and sediment samples were collected from Catú Lake, Ceará, Brazil, from March 2011 to February 2012. The obtained yeasts were identified based on morphological and biochemical characteristics. Of the 46 isolates, 37 were Candida spp., 4 were Trichosporon asahii, 3 were Cryptococcus laurentii, 1 Rhodotorula mucilaginosa, and 1 was Kodamaea ohmeri. These isolates were subjected to broth microdilution assay with amphotericin B, itraconazole, and fluconazole, according to the methodology standardized by the Clinical and Laboratory Standards Institute (CLSI). The minimum inhibitory concentrations (MICs) of amphotericin B, itraconazole, and fluconazole were 0.03125–2 μg/mL, 0.0625 to ≥16 μg/mL, and 0.5 to ≥64 μg/mL, respectively, and 13 resistant azole-resistant Candida isolates were detected. A reduction in the azole MICs leading to the phenotypical reversal of the azole resistance was observed upon addition of efflux-pump inhibitors. These findings suggest that the azole resistance among environmental Candida spp. is most likely associated with the overexpression of efflux-pumps.
Collapse
Affiliation(s)
- Raimunda S N Brilhante
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil.
| | - Manoel A N Paiva
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil; School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Célia M S Sampaio
- School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Débora S C M Castelo-Branco
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Carlos E C Teixeira
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Lucas P de Alencar
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil; School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Tereza J P G Bandeira
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil; School of Medicine, Christus College - UNICHRISTUS, Fortaleza, Ceará, Brazil
| | - André J Monteiro
- Department of Statistics and Applied Mathematics, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Rossana A Cordeiro
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Waldemiro A Pereira-Neto
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - José J C Sidrim
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - José L B Moreira
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Marcos F G Rocha
- Department of Pathology and Legal Medicine, Faculty of Medicine, Postgraduate Program in Medical Microbiology, Specialized Medical Mycology Center, Federal University of Ceará, Fortaleza, Ceará, Brazil; School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza, Ceará, Brazil
| |
Collapse
|
43
|
Babajide JM, Maina S, Kiawa B, Skilton R. Identification of fungal isolates from steeped yam (Gbodo): Predominance of Meyerozyma guilliermondii. Food Sci Biotechnol 2015. [DOI: 10.1007/s10068-015-0133-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
44
|
Pfaller MA, Rhomberg PR, Messer SA, Jones RN, Castanheira M. Isavuconazole, micafungin, and 8 comparator antifungal agents' susceptibility profiles for common and uncommon opportunistic fungi collected in 2013: temporal analysis of antifungal drug resistance using CLSI species-specific clinical breakpoints and proposed epidemiological cutoff values. Diagn Microbiol Infect Dis 2015; 82:303-13. [PMID: 25986029 DOI: 10.1016/j.diagmicrobio.2015.04.008] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 04/21/2015] [Accepted: 04/24/2015] [Indexed: 10/23/2022]
Abstract
The in vitro activities of isavuconazole, micafungin, and 8 comparator antifungal agents were determined for 1613 clinical isolates of fungi (1320 isolates of Candida spp., 155 of Aspergillus spp., 103 of non-Candida yeasts, and 35 non-Aspergillus molds) collected during a global survey conducted in 2013. The vast majority of the isolates of the 21 different species of Candida, with the exception of Candida glabrata (MIC90, 2 μg/mL), Candida krusei (MIC90, 1 μg/mL), and Candida guilliermondii (MIC90, 8 μg/mL), were inhibited by ≤0.25 μg/mL of isavuconazole. C. glabrata and C. krusei were largely inhibited by ≤1 μg/mL of isavuconazole. Resistance to fluconazole was seen in 0.5% of Candida albicans isolates, 11.1% of C. glabrata isolates, 2.5% of Candida parapsilosis isolates, 4.5% of Candida tropicalis isolates, and 20.0% of C. guilliermondii isolates. Resistance to the echinocandins was restricted to C. glabrata (1.3-2.1%) and C. tropicalis (0.9-1.8%). All agents except for the echinocandins were active against 69 Cryptococcus neoformans isolates, and the triazoles, including isavuconazole, were active against the other yeasts. Both the mold active triazoles as well as the echinocandins were active against 155 Aspergillus spp. isolates belonging to 10 species/species complex. In general, there was low resistance levels to the available systemically active antifungal agents in a large, contemporary (2013), global collection of molecularly characterized yeasts and molds. Resistance to azoles and echinocandins was most prominent among isolates of C. glabrata, C. tropicalis, and C. guilliermondii.
Collapse
Affiliation(s)
- M A Pfaller
- University of Iowa College of Medicine, Iowa City, IA; JMI Laboratories, North Liberty, IA.
| | | | | | | | | |
Collapse
|
45
|
Mazari W, Boucherit-Otmani Z, Boucherit K. In vitro susceptibility of amphotericin-B, voriconazole and caspofungin against Candida guilliermondii biofilms, isolated from dentals units water pipes, under different growth phases. J Mycol Med 2015; 25:57-62. [DOI: 10.1016/j.mycmed.2014.10.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/01/2014] [Accepted: 10/30/2014] [Indexed: 11/29/2022]
|
46
|
Candida fermentati as a cause of persistent fungemia in a preterm neonate successfully treated by combination therapy with amphotericin B and caspofungin. J Clin Microbiol 2015; 53:1038-41. [PMID: 25568433 DOI: 10.1128/jcm.03351-14] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
A case of persistent candidemia in a preterm neonate caused by Candida fermentati, identified by sequencing of the internally transcribed spacer region of ribosomal DNA (rDNA), is described. The neonate was treated for 30 days by combination therapy with amphotericin B (AmBisome) and caspofungin with a successful outcome, and no drug-related side effects were observed.
Collapse
|
47
|
Sanchis M, Pastor FJ, Capilla J, Sutton DA, Fothergill AW, Guarro J. Experimental therapy with azoles against Candida guilliermondii. Antimicrob Agents Chemother 2014; 58:6255-7. [PMID: 25049245 PMCID: PMC4187986 DOI: 10.1128/aac.03051-14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 07/12/2014] [Indexed: 11/20/2022] Open
Abstract
We evaluated the in vitro killing activity of voriconazole (VRC) and posaconazole (PSC) against two clinical isolates of Candida guilliermondii. The two drugs showed fungistatic activity against both isolates and were effective in reducing kidney fungal burden in a neutropenic murine model of disseminated candidiasis in infected mice. PSC was significantly more effective than VRC against one of the strains. The serum levels of PSC and VRC were above the corresponding MICs for these isolates.
Collapse
Affiliation(s)
- Marta Sanchis
- Unitat de Microbiologia and Unitat d'Anatomia Patològica, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Tarragona, Spain
| | - Francisco Javier Pastor
- Unitat de Microbiologia and Unitat d'Anatomia Patològica, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Tarragona, Spain
| | - Javier Capilla
- Unitat de Microbiologia and Unitat d'Anatomia Patològica, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Tarragona, Spain
| | - Deanna A Sutton
- Fungus Testing Laboratory, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Annette W Fothergill
- Fungus Testing Laboratory, University of Texas Health Science Center, San Antonio, Texas, USA
| | - Josep Guarro
- Unitat de Microbiologia and Unitat d'Anatomia Patològica, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Tarragona, Spain
| |
Collapse
|
48
|
Abstract
Candida species are the most common causes of fungal infection. Approximately 90% of infections are caused by five species: Candida albicans, Candida glabrata, Candida tropicalis, Candida parapsilosis, and Candida krusei. Three (C. albicans, C. tropicalis, and C. parapsilosis) belong to the CTG clade, in which the CTG codon is translated as serine and not leucine. C. albicans remains the most commonly isolated but is decreasing relative to the other species. The increasing incidence of C. glabrata is related to its reduced susceptibility to azole drugs. Genome analysis suggests that virulence in the CTG clade is associated with expansion of gene families, particularly of cell wall genes. Similar independent processes took place in the C. glabrata species group. Gene loss and expansion in an ancestor of C. glabrata may have resulted in preadaptations that enabled pathogenicity.
Collapse
Affiliation(s)
- Siobhán A Turner
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| | - Geraldine Butler
- School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland
| |
Collapse
|
49
|
An B, Chen Y, Li B, Qin G, Tian S. Ca(2+)-CaM regulating viability of Candida guilliermondii under oxidative stress by acting on detergent resistant membrane proteins. J Proteomics 2014; 109:38-49. [PMID: 24998432 DOI: 10.1016/j.jprot.2014.06.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/10/2014] [Accepted: 06/26/2014] [Indexed: 11/18/2022]
Abstract
UNLABELLED Reactive oxygen species (ROS) play a vital role in reducing viability of yeast cells. The Ca(2+)-CaM signaling pathways are involved in regulating the intracellular ROS level in yeast cells under stress. Detergent resistant membranes (DRMs), the sterol-rich microdomains, participate in a wide range of cellular processes including growth, trafficking and death in yeast cells. In the present study, we found that Trifluoperazine (TFP), an antagonist of CaM, could increase the viability of Candida guilliermondii cells under H2O2 stress. Based on comparative analysis of DRM sub proteomics, a total number of 29 differentially expressed protein spots were identified, among which 8 protein spots belong to the electron transport chain and 7 protein spots belong to transporters. It is suggested that TFP treatment could modulate the intracellular ROS generation in yeast cells. We additionally ascertained that TFP treatment could effectively alleviate the ROS accumulation and protein damage in C. guilliermondii cells under H2O2 stress, via investigating the intracellular ROS levels and protein oxidative damage in yeast cells. These findings firstly revealed that the Ca(2+)-CaM signaling pathway is related to the viability of yeast cells under H2O2 stress, and provide novel evidences for exploring Ca(2+)-CaM's role in regulating this viability via acting on DRM proteins. BIOLOGICAL SIGNIFICANCE Detergent-resistant membranes (DRMs), which are more resistant to extraction with cold non-ionic detergents, have been considered the functional microdomains in the plasma membrane. In yeast, DRMs are involved in a wide range of additional cellular processes including cell growth and death. The Ca(2+)-CaM signaling pathways could regulate the stress tolerance of yeast cells by modulating the intracellular ROS generation. In this study, we found that trifluoperazine (TFP), a calmodulin antagonist, could increase the viability of C. guilliermondii under H2O2 stress. Based on comparative analysis of DRM sub proteomics, electron transport chain proteins and transporters were identified to be associated with the Ca(2+)-CaM transduction. We proved that TFP treatment decreases the intracellular ROS accumulation and alleviates oxidative damage to cellular proteins. These results ascertain that Ca(2+)-CaM is involved in regulating the viability of C. guilliermondii under oxidative stress via acting on the DRM proteins.
Collapse
Affiliation(s)
- Bang An
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Guozheng Qin
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
| |
Collapse
|
50
|
Pfaller MA, Andes DR, Diekema DJ, Horn DL, Reboli AC, Rotstein C, Franks B, Azie NE. Epidemiology and outcomes of invasive candidiasis due to non-albicans species of Candida in 2,496 patients: data from the Prospective Antifungal Therapy (PATH) registry 2004-2008. PLoS One 2014; 9:e101510. [PMID: 24991967 PMCID: PMC4081561 DOI: 10.1371/journal.pone.0101510] [Citation(s) in RCA: 286] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 06/06/2014] [Indexed: 12/26/2022] Open
Abstract
This analysis describes the epidemiology and outcomes of invasive candidiasis caused by non-albicans species of Candida in patients enrolled in the Prospective Antifungal Therapy Alliance (PATH Alliance) registry from 2004 to 2008. A total of 2,496 patients with non-albicans species of Candida isolates were identified. The identified species were C. glabrata (46.4%), C. parapsilosis (24.7%), C. tropicalis (13.9%), C. krusei (5.5%), C. lusitaniae (1.6%), C. dubliniensis (1.5%) and C. guilliermondii (0.4%); 111 infections involved two or more species of Candida (4.4%). Non-albicans species accounted for more than 50% of all cases of invasive candidiasis in 15 of the 24 sites (62.5%) that contributed more than one case to the survey. Among solid organ transplant recipients, patients with non-transplant surgery, and patients with solid tumors, the most prevalent non-albicans species was C. glabrata at 63.7%, 48.0%, and 53.8%, respectively. In 1,883 patients receiving antifungal therapy on day 3, fluconazole (30.5%) and echinocandins (47.5%) were the most frequently administered monotherapies. Among the 15 reported species, 90-day survival was highest for patients infected with either C. parapsilosis (70.7%) or C. lusitaniae (74.5%) and lowest for patients infected with an unknown species (46.7%) or two or more species (53.2%). In conclusion, this study expands the current knowledge of the epidemiology and outcomes of invasive candidiasis caused by non-albicans species of Candida in North America. The variability in species distribution in these centers underscores the importance of local epidemiology in guiding the selection of antifungal therapy.
Collapse
Affiliation(s)
- Michael A. Pfaller
- JMI Laboratories, North Liberty, Iowa, United States of America
- Department of Pathology, University of Iowa, Iowa City, Iowa, United States of America
- * E-mail:
| | - David R. Andes
- Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
| | - Daniel J. Diekema
- Department of Pathology, University of Iowa, Iowa City, Iowa, United States of America
| | - David L. Horn
- David Horn LLC, Doylestown, Pennsylvania, United States of America
| | - Annette C. Reboli
- Department of Medicine, Cooper Medical School of Rowan University, Camden, New Jersey, United States of America
| | - Coleman Rotstein
- Division of Infectious Diseases, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Billy Franks
- Astellas Scientific and Medical Affairs, Northbrook, Illinois, United States of America
| | - Nkechi E. Azie
- Astellas Scientific and Medical Affairs, Northbrook, Illinois, United States of America
| |
Collapse
|