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Ettadili H, Vural C. Current global status of Candida auris an emerging multidrug-resistant fungal pathogen: bibliometric analysis and network visualization. Braz J Microbiol 2024; 55:391-402. [PMID: 38261261 PMCID: PMC10920528 DOI: 10.1007/s42770-023-01239-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 12/28/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND Candida auris is an emerging multidrug-resistant fungal pathogen associated with nosocomial infections and hospital outbreaks worldwide, presenting a serious global health threat. There has been a rapid emergence of scientific research publications focusing on therapeutic compounds, diagnostic techniques, control strategies, prevention, and understanding the epidemiology related to C. auris. OBJECTIVE This study aims to provide the most up-to-date comprehensive and integrated examination of C. auris research subject and demonstrate that C. auris is indeed a topic of increasing interest. METHODS The search query "candida-auris" was used as a topic term to find and retrieve relevant data published between 2009 and 15 June 2023, from the Web of Science Core Collection (WoSCC) database. In this work, the bibliometric analysis and network visualization were conducted using VOSviewer software, and Biblioshiny interface accessible through the Bibliometrix R-package on RStudio software. RESULTS The yearly growth rate percentage (37.91%), along with the strong positive correlations between publications and citations (r = 0.981; p < 0.001), suggests heightened scholarly engagement in this topic. The USA, India, China, and the UK have emerged as pivotal contributors, with the Centers for Disease Control and Prevention (CDC) in the USA being the most productive institution. Current research hotspots in this field mainly focused on identifying and limiting transmission of the clonal strains, epidemiology, antifungal resistance, and in vitro antifungal susceptibility testing. CONCLUSION This detailed bibliometric analysis in C. auris topic shows that this fungal pathogen has garnered growing attention and attracted progressively more scholars. This paper will help researchers to find without difficulty the relevant articles, research hotspots, influential authors, institutions, and countries related to the topic.
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Affiliation(s)
- Hamza Ettadili
- Faculty of Science, Department of Biology, Molecular Biology Section, Pamukkale University, 20160, Denizli, Turkey
| | - Caner Vural
- Faculty of Science, Department of Biology, Molecular Biology Section, Pamukkale University, 20160, Denizli, Turkey.
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2
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Denning DW. Renaming Candida glabrata-A case of taxonomic purity over clinical and public health pragmatism. PLoS Pathog 2024; 20:e1012055. [PMID: 38489254 PMCID: PMC10942050 DOI: 10.1371/journal.ppat.1012055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2024] Open
Affiliation(s)
- David W. Denning
- Manchester Fungal Infection Group, The University of Manchester and Manchester Academic Health Science Centre, Manchester, United Kingdom
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3
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Borman AM, Johnson EM. Changes in fungal taxonomy: mycological rationale and clinical implications. Clin Microbiol Rev 2023; 36:e0009922. [PMID: 37930182 PMCID: PMC10732072 DOI: 10.1128/cmr.00099-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/13/2023] [Indexed: 11/07/2023] Open
Abstract
Numerous fungal species of medical importance have been recently subjected to and will likely continue to undergo nomenclatural changes as a result of the application of molecular approaches to fungal classification together with abandonment of dual nomenclature. Here, we summarize those changes affecting key groups of fungi of medical importance, explaining the mycological (taxonomic) rationale that underpinned the changes and the clinical relevance/importance (where such exists) of the key nomenclatural revisions. Potential mechanisms to mitigate unnecessary taxonomic instability are suggested, together with approaches to raise awareness of important changes to minimize potential clinical confusion.
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Affiliation(s)
- Andrew M. Borman
- UK HSA National Mycology Reference Laboratory, Science Quarter, Southmead Hospital, Bristol, United Kingdom
- Medical Research Council Centre for Medical Mycology (MRC CMM), University of Exeter, Exeter, United Kingdom
| | - Elizabeth M. Johnson
- UK HSA National Mycology Reference Laboratory, Science Quarter, Southmead Hospital, Bristol, United Kingdom
- Medical Research Council Centre for Medical Mycology (MRC CMM), University of Exeter, Exeter, United Kingdom
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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] [What about the content of this article? (0)] [Affiliation(s)] [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.
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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
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Ordaya EE, Clement J, Vergidis P. The Role of Novel Antifungals in the Management of Candidiasis: A Clinical Perspective. Mycopathologia 2023; 188:937-948. [PMID: 37470902 PMCID: PMC10687117 DOI: 10.1007/s11046-023-00759-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 05/31/2023] [Indexed: 07/21/2023]
Abstract
Mucosal and invasive candidiasis can be challenging to treat in the setting of drug intolerance, antifungal resistance, drug-drug interactions, or host immune status. Antifungals with novel mechanisms of action and distinct pharmacokinetic/pharmacodynamic properties have been developed in recent years. Rezafungin is an echinocandin with high-tissue penetration and an extended half-life that allows for once-weekly administration, making it a convenient treatment option for invasive candidiasis while obviating the need for central catheter placement. Ibrexafungerp is an oral glucan synthase inhibitor that is active against most echinocandin-resistant Candida species. At present, it is approved for the treatment of acute vulvovaginal candidiasis and is under investigation as an oral step-down therapy following initial treatment with an echinocandin for cases of invasive candidiasis. Oteseconazole is a long-acting tetrazole that exhibits a higher affinity for the fungal enzyme CYP51, resulting in a potentially lower risk of drug-drug interactions and side effects compared to other azoles. It is currently approved for the treatment of recurrent vulvovaginal candidiasis. Fosmanogepix has a novel mechanism of action and potent activity against several Candida strains resistant to other antifungals. Due to its considerable bioavailability and tissue penetration, it holds promise as a potential treatment option in patients with invasive candidiasis, including those with chorioretinitis or meningitis. Results from clinical trials and observational studies will further delineate the role of these agents in the management of candidiasis. As the usage of these novel antifungals becomes widespread, we expect to acquire a greater understanding of their efficacy and potential benefits.
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Affiliation(s)
- Eloy E Ordaya
- Division of Public Health, Infectious Disease, and Occupational Medicine, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA.
| | - Josh Clement
- Department of Pharmacy, Mayo Clinic, Rochester, MN, USA
| | - Paschalis Vergidis
- Division of Public Health, Infectious Disease, and Occupational Medicine, Mayo Clinic, 200 First St SW, Rochester, MN, 55905, USA
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Czajka KM, Venkataraman K, Brabant-Kirwan D, Santi SA, Verschoor C, Appanna VD, Singh R, Saunders DP, Tharmalingam S. Molecular Mechanisms Associated with Antifungal Resistance in Pathogenic Candida Species. Cells 2023; 12:2655. [PMID: 37998390 PMCID: PMC10670235 DOI: 10.3390/cells12222655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023] Open
Abstract
Candidiasis is a highly pervasive infection posing major health risks, especially for immunocompromised populations. Pathogenic Candida species have evolved intrinsic and acquired resistance to a variety of antifungal medications. The primary goal of this literature review is to summarize the molecular mechanisms associated with antifungal resistance in Candida species. Resistance can be conferred via gain-of-function mutations in target pathway genes or their transcriptional regulators. Therefore, an overview of the known gene mutations is presented for the following antifungals: azoles (fluconazole, voriconazole, posaconazole and itraconazole), echinocandins (caspofungin, anidulafungin and micafungin), polyenes (amphotericin B and nystatin) and 5-fluorocytosine (5-FC). The following mutation hot spots were identified: (1) ergosterol biosynthesis pathway mutations (ERG11 and UPC2), resulting in azole resistance; (2) overexpression of the efflux pumps, promoting azole resistance (transcription factor genes: tac1 and mrr1; transporter genes: CDR1, CDR2, MDR1, PDR16 and SNQ2); (3) cell wall biosynthesis mutations (FKS1, FKS2 and PDR1), conferring resistance to echinocandins; (4) mutations of nucleic acid synthesis/repair genes (FCY1, FCY2 and FUR1), resulting in 5-FC resistance; and (5) biofilm production, promoting general antifungal resistance. This review also provides a summary of standardized inhibitory breakpoints obtained from international guidelines for prominent Candida species. Notably, N. glabrata, P. kudriavzevii and C. auris demonstrate fluconazole resistance.
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Affiliation(s)
- Karolina M. Czajka
- Medical Sciences Division, NOSM University, 935 Ramsey Lake Rd., Sudbury, ON P3E 2C6, Canada; (K.M.C.); (K.V.); (C.V.); (R.S.); (D.P.S.)
| | - Krishnan Venkataraman
- Medical Sciences Division, NOSM University, 935 Ramsey Lake Rd., Sudbury, ON P3E 2C6, Canada; (K.M.C.); (K.V.); (C.V.); (R.S.); (D.P.S.)
- School of Natural Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada;
| | | | - Stacey A. Santi
- Health Sciences North Research Institute, Sudbury, ON P3E 2H2, Canada; (D.B.-K.); (S.A.S.)
| | - Chris Verschoor
- Medical Sciences Division, NOSM University, 935 Ramsey Lake Rd., Sudbury, ON P3E 2C6, Canada; (K.M.C.); (K.V.); (C.V.); (R.S.); (D.P.S.)
- School of Natural Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada;
- Health Sciences North Research Institute, Sudbury, ON P3E 2H2, Canada; (D.B.-K.); (S.A.S.)
| | - Vasu D. Appanna
- School of Natural Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada;
| | - Ravi Singh
- Medical Sciences Division, NOSM University, 935 Ramsey Lake Rd., Sudbury, ON P3E 2C6, Canada; (K.M.C.); (K.V.); (C.V.); (R.S.); (D.P.S.)
- Health Sciences North Research Institute, Sudbury, ON P3E 2H2, Canada; (D.B.-K.); (S.A.S.)
| | - Deborah P. Saunders
- Medical Sciences Division, NOSM University, 935 Ramsey Lake Rd., Sudbury, ON P3E 2C6, Canada; (K.M.C.); (K.V.); (C.V.); (R.S.); (D.P.S.)
- Health Sciences North Research Institute, Sudbury, ON P3E 2H2, Canada; (D.B.-K.); (S.A.S.)
| | - Sujeenthar Tharmalingam
- Medical Sciences Division, NOSM University, 935 Ramsey Lake Rd., Sudbury, ON P3E 2C6, Canada; (K.M.C.); (K.V.); (C.V.); (R.S.); (D.P.S.)
- School of Natural Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada;
- Health Sciences North Research Institute, Sudbury, ON P3E 2H2, Canada; (D.B.-K.); (S.A.S.)
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Dubois VA, Salgado PA, Gliosca LA, Molgatini SL. gDNA extraction from Candida albicans and Candida dubliniensis in subgingival samples in Argentina. Evaluation of different methods. Acta Odontol Latinoam 2023; 36:78-85. [PMID: 37776504 PMCID: PMC10557081 DOI: 10.54589/aol.36/2/78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 02/01/2022] [Indexed: 10/02/2023]
Abstract
The oral cavity constitutes a unique ecosystem with highly variable ecological niches that harbor a great variety of microorganisms, including yeasts. Molecular methods are currently considered the gold standard for identifying species, although they involve limitations associated with the disruption of yeast cell walls to release the genomic DNA (gDNA) for amplification. AIM The aim of this study was to compare the performance of different methods for extracting gDNA from Candida albicans and Candida dubliniensis, subsequently amplifying DNA by PCR. MATERIALS AND METHOD Fifty-two isolates (16 C. albicans and 36 C. dubliniensis) were obtained from subgingival biofilm of HIV+ patients with clinical signs of periodontal disease. The study evaluated 6 gDNA extraction methods and two PCR amplification methods. Furthermore, the presence of alleles of HWP1 gene was determined in C. albicans. RESULTS Comparisons of six methods show statistically significant differences (p <0.001) except for C. albicans in two of them. For C. dubliniensis, statistical differences were observed in all comparisons. Commercial methods were more efficient for concentrating gDNA than in-house methods, and both PCRs were effective. Ten heterozygous C. albicans isolates for this allele were positive for the HWP1-1 / HWP1-2 allele, one was homozygous for Wild Type HWP1-1 allele, and 5 were homozygous for novel/rare HWP1-2 allele. CONCLUSIONS This study aims to provide simple, inexpensive strategies for phenotypic identification and molecular confirmation of Candida albicans and Candida dubliniensis for non-reference laboratories with low complexity and/or low budgets.
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Affiliation(s)
- Verónica A Dubois
- Universidad de Buenos Aires. Facultad de Odontología. Hospital Odontológico Universitario. Cátedra de Microbiología y Parasitología, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Odontología, Instituto de Investigaciones en Salud Pública, Buenos Aires, Argentina
| | - Pablo A Salgado
- Universidad de Buenos Aires. Facultad de Odontología. Hospital Odontológico Universitario. Cátedra de Microbiología y Parasitología, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Odontología, Instituto de Investigaciones en Salud Pública, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Odontología, Hospital Odontológico Universitario, Cátedra de Odontología Preventiva y Comunitaria, Buenos Aires, Argentina
| | - Laura A Gliosca
- Universidad de Buenos Aires. Facultad de Odontología. Hospital Odontológico Universitario. Cátedra de Microbiología y Parasitología, Buenos Aires, Argentina.
- Universidad de Buenos Aires, Facultad de Odontología, Instituto de Investigaciones en Salud Pública, Buenos Aires, Argentina
| | - Susana L Molgatini
- Universidad de Buenos Aires. Facultad de Odontología. Hospital Odontológico Universitario. Cátedra de Microbiología y Parasitología, Buenos Aires, Argentina
- Universidad de Buenos Aires, Facultad de Odontología, Instituto de Investigaciones en Salud Pública, Buenos Aires, Argentina
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Alencar BRA, de Freitas RAA, Guimarães VEP, Silva RK, Elsztein C, da Silva SP, Dutra ED, de Morais Junior MA, de Souza RB. Meyerozyma caribbica Isolated from Vinasse-Irrigated Sugarcane Plantation Soil: A Promising Yeast for Ethanol and Xylitol Production in Biorefineries. J Fungi (Basel) 2023; 9:789. [PMID: 37623560 PMCID: PMC10455855 DOI: 10.3390/jof9080789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/12/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
The production of fuels and other industrial products from renewable sources has intensified the search for new substrates or for the expansion of the use of substrates already in use, as well as the search for microorganisms with different metabolic capacities. In the present work, we isolated and tested a yeast from the soil of sugarcane irrigated with vinasse, that is, with high mineral content and acidic pH. The strain of Meyerozyma caribbica URM 8365 was able to ferment glucose, but the use of xylose occurred when some oxygenation was provided. However, some fermentation of xylose to ethanol in oxygen limitation also occurs if glucose was present. This strain was able to produce ethanol from molasses substrate with 76% efficiency, showing its tolerance to possible inhibitors. High ethanol production efficiencies were also observed in acidic hydrolysates of each bagasse, sorghum, and cactus pear biomass. Mixtures of these substrates were tested and the best composition was found for the use of excess plant biomass in supplementation of primary substrates. It was also possible to verify the production of xylitol from xylose when the acetic acid concentration is reduced. Finally, the proposed metabolic model allowed calculating how much of the xylose carbon can be directed to the production of ethanol and/or xylitol in the presence of glucose. With this, it is possible to design an industrial plant that combines the production of ethanol and/or xylitol using combinations of primary substrates with hydrolysates of their biomass.
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Affiliation(s)
- Bárbara Ribeiro Alves Alencar
- Laboratory of Biomass Energy, Department of Nuclear Energy, Federal University of Pernambuco, Recife 50670-901, Brazil; (B.R.A.A.); (S.P.d.S.); (E.D.D.)
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife 50670-901, Brazil; (R.A.A.d.F.); (R.K.S.); (C.E.)
| | - Renan Anderson Alves de Freitas
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife 50670-901, Brazil; (R.A.A.d.F.); (R.K.S.); (C.E.)
| | | | - Rayssa Karla Silva
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife 50670-901, Brazil; (R.A.A.d.F.); (R.K.S.); (C.E.)
- Laboratory of Microbial Metabolism, Institute of Biological Sciences, University of Pernambuco, Recife 50110-000, Brazil;
| | - Carolina Elsztein
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife 50670-901, Brazil; (R.A.A.d.F.); (R.K.S.); (C.E.)
| | - Suzyanne Porfírio da Silva
- Laboratory of Biomass Energy, Department of Nuclear Energy, Federal University of Pernambuco, Recife 50670-901, Brazil; (B.R.A.A.); (S.P.d.S.); (E.D.D.)
| | - Emmanuel Damilano Dutra
- Laboratory of Biomass Energy, Department of Nuclear Energy, Federal University of Pernambuco, Recife 50670-901, Brazil; (B.R.A.A.); (S.P.d.S.); (E.D.D.)
| | - Marcos Antonio de Morais Junior
- Laboratory of Microbial Genetics, Department of Genetics, Federal University of Pernambuco, Recife 50670-901, Brazil; (R.A.A.d.F.); (R.K.S.); (C.E.)
| | - Rafael Barros de Souza
- Laboratory of Microbial Metabolism, Institute of Biological Sciences, University of Pernambuco, Recife 50110-000, Brazil;
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Karajacob AS, Azizan NB, Al-Maleki ARM, Goh JPE, Loke MF, Khor HM, Ho GF, Ponnampalavanar S, Tay ST. Candida species and oral mycobiota of patients clinically diagnosed with oral thrush. PLoS One 2023; 18:e0284043. [PMID: 37068057 PMCID: PMC10109505 DOI: 10.1371/journal.pone.0284043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 03/22/2023] [Indexed: 04/18/2023] Open
Abstract
Overgrowth of Candida yeasts in the oral cavity may result in the development of oral thrush in immunocompromised individuals. This study analyzed the diversity and richness of the oral mycobiota of patients clinically diagnosed with oral thrush (OT), follow-up of oral thrush patients after antifungal therapy (AT), and healthy controls (HC). Oral rinse and oral swab samples were collected from 38 OT patients, 21 AT patients, and 41 healthy individuals (HC). Pellet from the oral rinse and oral swab were used for the isolation of oral Candida yeasts on Brilliance Candida Agar followed by molecular speciation. ITS1 amplicon sequencing using Illumina MiSeq was performed on DNA extracted from the oral rinse pellet of 16 OT, 7 AT, and 7 HC oral rinse samples. Trimmed sequence data were taxonomically grouped and analyzed using the CLC Microbial Genomics Module workflow. Candida yeasts were isolated at significantly higher rates from oral rinse and swab samples of OT (68.4%, p < 0.001) and AT (61.9%, p = 0.012) patients, as compared to HC (26.8%). Predominance of Candida albicans specifically, was noted in OT (60.5%, p < 0.001) and AT (42.9%, p = 0.006) vs. HC (9.8%), while non-albicans Candida species was dominant in HC. Analysis of oral mycobiota from OT patients showed the presence of 8 phyla, 222 genera, and 309 fungal species. Low alpha diversity (Shannon index, p = 0.006; Chao-1 biased corrected index, p = 0.01), varied beta diversity (Bray-Curtis, p = 0.01986; Jaccard, p = 0.02766; Weighted UniFrac, p = 0.00528), and increased relative abundance of C. albicans (p = 3.18E-02) was significantly associated with the oral mycobiota of OT vs. HC. This study supported that C. albicans is the main etiological agent in oral thrush and highlights the association of fungal biodiversity with the pathophysiology of oral thrush.
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Affiliation(s)
| | - Nuramirah Binti Azizan
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | | | - Joanne Pei En Goh
- Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Mun Fai Loke
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Hui Min Khor
- Department of Medicine, Faculty of Medicine, University of Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - Gwo Fuang Ho
- Department of Clinical Oncology, Faculty of Medicine, University of Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - Sasheela Ponnampalavanar
- Department of Medicine, Faculty of Medicine, University of Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - Sun Tee Tay
- Department of Medical Microbiology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
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Li H, Miao MX, Jia CL, Cao YB, Yan TH, Jiang YY, Yang F. Interactions between Candida albicans and the resident microbiota. Front Microbiol 2022; 13:930495. [PMID: 36204612 PMCID: PMC9531752 DOI: 10.3389/fmicb.2022.930495] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 08/31/2022] [Indexed: 01/09/2023] Open
Abstract
Candida albicans is a prevalent, opportunistic human fungal pathogen. It usually dwells in the human body as a commensal, however, once in its pathogenic state, it causes diseases ranging from debilitating superficial to life-threatening systemic infections. The switch from harmless colonizer to virulent pathogen is, in most cases, due to perturbation of the fungus-host-microbiota interplay. In this review, we focused on the interactions between C. albicans and the host microbiota in the mouth, gut, blood, and vagina. We also highlighted important future research directions. We expect that the evaluation of these interplays will help better our understanding of the etiology of fungal infections and shed new light on the therapeutic approaches.
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Affiliation(s)
- Hao Li
- Department of Pharmacy, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China,Department of Physiology and Pharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Ming-xing Miao
- Department of Physiology and Pharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Cheng-lin Jia
- Institute of Vascular Disease, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yong-bing Cao
- Institute of Vascular Disease, Shanghai TCM-Integrated Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tian-hua Yan
- Department of Physiology and Pharmacology, School of Basic Medicine and Clinical Pharmacy, China Pharmaceutical University, Nanjing, China,*Correspondence: Tian-hua Yan,
| | - Yuan-ying Jiang
- Department of Pharmacy, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China,Yuan-ying Jiang,
| | - Feng Yang
- Department of Pharmacy, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China,Feng Yang,
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Kumar S, Kumar A, Roudbary M, Mohammadi R, Černáková L, Rodrigues CF. Overview on the Infections Related to Rare Candida species. Pathogens 2022; 11:963. [PMID: 36145394 PMCID: PMC9505029 DOI: 10.3390/pathogens11090963] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/19/2022] [Accepted: 08/21/2022] [Indexed: 11/30/2022] Open
Abstract
Atypical Candida spp. infections are rising, mostly due to the increasing numbers of immunocompromised patients. The most common Candida spp. is still Candida albicans; however, in the last decades, there has been an increase in non-Candida albicans Candida species infections (e.g., Candida glabrata, Candida parapsilosis, and Candida tropicalis). Furthermore, in the last 10 years, the reports on uncommon yeasts, such as Candida lusitaniae, Candida intermedia, or Candida norvegensis, have also worryingly increased. This review summarizes the information, mostly related to the last decade, regarding the infections, diagnosis, treatment, and resistance of these uncommon Candida species. In general, there has been an increase in the number of articles associated with the incidence of these species. Additionally, in several cases, there was a suggestive antifungal resistance, particularly with azoles, which is troublesome for therapeutic success.
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Sanyaolu A, Okorie C, Marinkovic A, Abbasi AF, Prakash S, Mangat J, Hosein Z, Haider N, Chan J. Candida auris: An Overview of the Emerging Drug-Resistant Fungal Infection. Infect Chemother 2022; 54:236-246. [PMID: 35794716 PMCID: PMC9259907 DOI: 10.3947/ic.2022.0008] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/11/2022] [Indexed: 12/12/2022] Open
Abstract
Candida auris is an invasive fungal pathogen that has been recognized globally as a serious health threat due to its extensive innate and acquired resistance to antifungal drugs. A growing number of emerging cases of C. auris have been reported with resistance to the standard antifungal treatments including azoles, echinocandins, and polyenes, making it difficult to treat. Unlike other Candida species, C. auris is challenging to diagnose using the standard laboratory methods and are typically prone to misidentification, resulting in inappropriate management. Consequently, C. auris infections have spread globally. The Centers for Disease Control and Prevention data showed that clinical cases of C. auris increased from 329 in 2018 to 1,012 in 2021. The incidence and prevalence of this invasive fungal infection are high in immunocompromised and hospitalized patients. Patients who had an organ transplant, are on immunosuppressive agents, are diabetic, recent antibiotic use, catheter use, and prolonged hospital or nursing homestays are vulnerable to C. auris infections. C. auris is rapidly spreading across healthcare settings globally and monitoring of its virulence as well as devising appropriate treatment approaches are thus highly required.
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Affiliation(s)
| | - Chuku Okorie
- Union County College, Plainfield Campus, Plainfield, NJ, USA
| | | | | | | | - Jasmine Mangat
- Caribbean Medical University School of Medicine, Willemstad, Curacao
| | - Zaheeda Hosein
- Caribbean Medical University School of Medicine, Willemstad, Curacao
| | - Nafees Haider
- All Saints University School of Medicine, Roseau, Dominica
| | - Jennifer Chan
- Medical University of the Americas, Nevis, Saint Kitts and Nevis
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Sarvestani HK, Ramandi A, Getso MI, Razavyoon T, Javidnia J, Golrizi MB, Saboor-Yaraghi AA, Ansari S. Mass spectrometry in research laboratories and clinical diagnostic: a new era in medical mycology. Braz J Microbiol 2022; 53:689-707. [PMID: 35344203 PMCID: PMC9151960 DOI: 10.1007/s42770-022-00715-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 02/14/2022] [Indexed: 02/01/2023] Open
Abstract
Diagnosis by clinical mycology laboratory plays a critical role in patient care by providing definitive knowledge of the cause of infection and antimicrobial susceptibility data to physicians. Rapid diagnostic methods are likely to improve patient. Aggressive resuscitation bundles, adequate source control, and appropriate antibiotic therapy are cornerstones for success in the treatment of patients. Routine methods for identifying clinical specimen fungal pathogen are based on the cultivation on different media with the subsequent examination of its phenotypic characteristics comprising a combination of microscopic and colony morphologies. As some fungi cannot be readily identified using these methods, molecular diagnostic methods may be required. These methods are fast, but it can cost a lot. Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) is suitable for high-throughput and rapid diagnostics at low costs. It can be considered an alternative for conventional biochemical and molecular identification systems in a microbiological laboratory. The reliability and accuracy of this method have been scrutinized in many surveys and have been compared with several methods including sequencing and molecular methods. According to these findings, the reliability and accuracy of this method are very high and can be trusted. With all the benefits of this technique, the libraries of MALDI-TOF MS need to be strengthened to enhance its performance. This review provides an overview of the most recent research literature that has investigated the applications and usage of MT-MS to the identification of microorganisms, mycotoxins, antifungal susceptibility examination, and mycobiome research.
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Affiliation(s)
- Hasti Kamali Sarvestani
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Ramandi
- Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Muhammad Ibrahim Getso
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Department of Medical Microbiology and Parasitology, College of Health Sciences, Bayero University, PMB, Kano, 3011, Nigeria
| | - Taraneh Razavyoon
- Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Javad Javidnia
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Miaad Banay Golrizi
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Ali-Akbar Saboor-Yaraghi
- Department of Nutrition and Biochemistry, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
- Department of Medical Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Saham Ansari
- Department of Medical Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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14
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Fonseca VJA, Braga AL, de Almeida RS, da Silva TG, da Silva JCP, de Lima LF, Dos Santos MHC, Dos Santos Silva RR, Teixeira CS, Coutinho HDM, Morais-Braga MFB. Lectins ConA and ConM extracted from Canavalia ensiformis (L.) DC and Canavalia rosea (Sw.) DC inhibit planktonic Candida albicans and Candida tropicalis. Arch Microbiol 2022; 204:346. [PMID: 35608680 DOI: 10.1007/s00203-022-02959-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 04/28/2022] [Accepted: 05/04/2022] [Indexed: 12/19/2022]
Abstract
Lectins participate in the defense against microorganisms and in signaling the damage caused by pathogens to the cell surface and/or intracellular in plants. This study aims to analyze the antifungal potential of lectins extracted from seeds of Canavalia ensiformis (L.) DC and Canavalia rosea (Sw.) DC, against Candida albicans and Candida tropicalis. The antimicrobial tests were performed by microdilution against Candida spp. The test to verify the combined lectin/fluconazole effect was performed using subinhibitory concentrations of lectins and with antifungal ranging from 0.5 to 512 µg/mL. The ability to inhibit the morphological transition of Candida spp. was evaluated by microcultivation in a moist chamber. The results of the minimum inhibitory concentration revealed no antifungal activity against the tested strains. However, lectins modified the action of fluconazole, reducing the IC50 of the drug against C. albicans. Lectins were also able to discretely modulate the morphological transition of the tested strains.
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15
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Ahmed N, Mahmood MS, Ullah MA, Araf Y, Rahaman TI, Moin AT, Hosen MJ. COVID-19-Associated Candidiasis: Possible Patho-Mechanism, Predisposing Factors, and Prevention Strategies. Curr Microbiol 2022; 79:127. [PMID: 35287179 PMCID: PMC8918595 DOI: 10.1007/s00284-022-02824-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Accepted: 02/23/2022] [Indexed: 01/08/2023]
Abstract
The coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is threatening public health. A large number of affected people need to be hospitalized. Immunocompromised patients and ICU-admitted patients are predisposed to further bacterial and fungal infections, making patient outcomes more critical. Among them, COVID-19-associated candidiasis is becoming more widely recognized as a part of severe COVID-19 sequelae. While the molecular pathophysiology is not fully understood, some factors, including a compromised immune system, iron and zinc deficiencies, and nosocomial and iatrogenic transmissions, predispose COVID-19 patients to candidiasis. In this review, we discuss the existing knowledge of the virulence characteristics of Candida spp. and summarize the key concepts in the possible molecular pathogenesis. We analyze the predisposing factors that make COVID-19 patients more susceptible to candidiasis and the preventive measures which will provide valuable insights to guide the effective prevention of candidiasis in COVID-19 patients.
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Affiliation(s)
- Nafisa Ahmed
- Biotechnology Program, Department of Mathematics and Natural Sciences, BRAC University, Dhaka, Bangladesh
| | - Maiesha Samiha Mahmood
- Biotechnology Program, Department of Mathematics and Natural Sciences, BRAC University, Dhaka, Bangladesh
| | - Md. Asad Ullah
- Department of Biotechnology and Genetic Engineering, Faculty of Biological Sciences, Jahangirnagar University, Savar, Dhaka, Bangladesh
| | - Yusha Araf
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
| | - Tanjim Ishraq Rahaman
- Department of Biotechnology and Genetic Engineering, Faculty of Life Sciences, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj, Bangladesh
| | - Abu Tayab Moin
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Chittagong, Chattogram, Bangladesh
| | - Mohammad Jakir Hosen
- Department of Genetic Engineering and Biotechnology, School of Life Sciences, Shahjalal University of Science and Technology, Sylhet, Bangladesh
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16
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Astvad KMT, Arikan-akdagli S, Arendrup MC. A Pragmatic Approach to Susceptibility Classification of Yeasts without EUCAST Clinical Breakpoints. J Fungi (Basel) 2022; 8:141. [PMID: 35205895 PMCID: PMC8877802 DOI: 10.3390/jof8020141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/14/2022] [Accepted: 01/15/2022] [Indexed: 11/17/2022] Open
Abstract
EUCAST has established clinical breakpoints for the six most common Candida species and Cryptococcus neoformans but not for less common yeasts because sufficient evidence is lacking. Consequently, the question “How to interpret the MIC?” for other yeasts often arises. We propose a pragmatic classification for amphotericin B, anidulafungin, fluconazole, and voriconazole MICs against 30 different rare yeasts. This classification takes advantage of MIC data for more than 4000 isolates generated in the EUCAST Development Laboratory for Fungi validated by alignment to published EUCAST MIC data. The classification relies on the following two important assumptions: first, that when isolates are genetically related, pathogenicity and intrinsic susceptibility patterns may be similar; and second, that even if species are not phylogenetically related, the rare yeasts will likely respond to therapy, provided the MIC is comparable to that against wild-type isolates of more prevalent susceptible species because rare yeasts are most likely “rare” due to a lower pathogenicity. In addition, the treatment recommendations available in the current guidelines based on the in vivo efficacy data and clinical experience are taken into consideration. Needless to say, it is of utmost importance (a) to ascertain that the species identification is correct (using MALDI-TOF or sequencing), and (b) to re-test the isolate once or twice to confirm that the MIC is representative for the isolate (because of the inherent variability in MIC determinations). We hope this pragmatic guidance is helpful until evidence-based EUCAST breakpoints can be formally established.
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17
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Zeise KD, Woods RJ, Huffnagle GB. Interplay between Candida albicans and Lactic Acid Bacteria in the Gastrointestinal Tract: Impact on Colonization Resistance, Microbial Carriage, Opportunistic Infection, and Host Immunity. Clin Microbiol Rev 2021; 34:e0032320. [PMID: 34259567 DOI: 10.1128/CMR.00323-20] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Emerging studies have highlighted the disproportionate role of Candida albicans in influencing both early community assembly of the bacterial microbiome and dysbiosis during allergic diseases and intestinal inflammation. Nonpathogenic colonization of the human gastrointestinal (GI) tract by C. albicans is common, and the role of this single fungal species in modulating bacterial community reassembly after broad-spectrum antibiotics can be readily recapitulated in mouse studies. One of the most notable features of C. albicans-associated dysbiotic states is a marked change in the levels of lactic acid bacteria (LAB). C. albicans and LAB share metabolic niches throughout the GI tract, and in vitro studies have identified various interactions between these microbes. The two predominant LAB affected are Lactobacillus species and Enterococcus species. Lactobacilli can antagonize enterococci and C. albicans, while Enterococcus faecalis and C. albicans have been reported to exhibit a mutualistic relationship. E. faecalis and C. albicans are also causative agents of a variety of life-threatening infections, are frequently isolated together from mixed-species infections, and share certain similarities in clinical presentation-most notably their emergence as opportunistic pathogens following disruption of the microbiota. In this review, we discuss and model the mechanisms used by Lactobacillus species, E. faecalis, and C. albicans to modulate each other's growth and virulence in the GI tract. With multidrug-resistant E. faecalis and C. albicans strains becoming increasingly common in hospital settings, examining the interplay between these three microbes may provide novel insights for enhancing the efficacy of existing antimicrobial therapies.
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Atalay A, Koç AN, Çakir N, Mutlu Sariguzel F, Sağiroğlu P. The investigation of antifungal susceptibilities of Kluyveromyces marxianus and Clavispora lusitaniae strains isolated from various clinical specimens. Journal of Surgery and Medicine 2021; 5:1104-1106. [DOI: 10.28982/josam.892965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Shokoohi G, Javidnia J, Mirhendi H, Rasekh-Jahromi A, Rezaei-Matehkolaei A, Ansari S, Maryami F, Goodarzi S, Romeo O. Molecular identification and antifungal susceptibility profiles of Candida dubliniensis and Candida africana isolated from vulvovaginal candidiasis: A single-centre experience in Iran. Mycoses 2021; 64:771-779. [PMID: 33811780 PMCID: PMC8251901 DOI: 10.1111/myc.13280] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 12/13/2022]
Abstract
Background Vulvovaginal candidiasis (VVC) is a common and debilitating long‐term illness affecting million women worldwide. This disease is caused mainly by Candida albicans and a lesser extent by other species, including the two phylogenetically closely related pathogens Candida africana and Candida dubliniensis. Objectives In this study, we report detailed molecular epidemiological data about the occurrence of these two pathogenic yeasts in Iranian patients affected by VVC, or its chronic recurrent form (RVVC), and provide, for the first time, data on the antifungal activity of two new drugs, efinaconazole (EFN) and luliconazole (LUL). Methods A total of 133 vaginal yeast isolates, presumptively identified as Calbicans by phenotypic and restriction analysis of rDNA, were further analysed by using a specific molecular method targeting the HWP1 gene. All Cafricana and Cdubliniensis isolates were also tested for their in vitro susceptibility to a panel of modern and classical antifungal drugs. Results and Conclusions Based on the molecular results, among 133 germ‐tube positive isolates, we identify 119 Calbicans (89.47%), 11 Cafricana (8.27%) and 3 Cdubliniensis (2.26%) isolates. Cafricana and Cdubliniensis showed low MIC values for most of the antifungal drugs tested, especially for EFN and LUL, which exhibited a remarkable antifungal activity. High MIC values were observed only for nystatin and terbinafine. Although Calbicans remains the most common Candida species recovered from Iranian VVC/RVVC patients, our data show that its prevalence may be slightly overestimated due to the presence of difficult‐to‐identify closely related yeast, especially Cafricana.
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Affiliation(s)
- Gholamreza Shokoohi
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran.,Zoonosis Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Javad Javidnia
- Student Research Committee Center, Mazandaran University of Medical Sciences, Sari, Iran.,Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hossein Mirhendi
- Department of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Athar Rasekh-Jahromi
- Department of Obstetrician and Gynecology, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Ali Rezaei-Matehkolaei
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Saham Ansari
- Department of Parasitology and Mycology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Faeze Maryami
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran.,Zoonosis Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Sahand Goodarzi
- Department of Medical Parasitology and Mycology, School of Medicine, Jahrom University of Medical Sciences, Jahrom, Iran.,Zoonosis Research Center, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Orazio Romeo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
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20
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Ababutain IM, Alghamdi AI. In vitro anticandidal activity and gas chromatography-mass spectrometry (GC-MS) screening of Vitex agnus-castus leaf extracts. PeerJ 2021; 9:e10561. [PMID: 33505793 PMCID: PMC7789864 DOI: 10.7717/peerj.10561] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/22/2020] [Indexed: 12/31/2022] Open
Abstract
Background Candida infections are becoming more drug resistant; it is necessary to search for alternative medications to treat them. Therefore, the present study estimates the anticandidal activity of Vitex agnus-castus (VA-C) leaf extracts. Methods We used the agar well diffusion method to assess the anticandidal activity of three different VA-C leaf extracts (ethanol, methanol, and water) against three Candida species (Candida tropicalis, Candida albicans, and Candida ciferrii). The minimum inhibitory concentration (MIC) was estimated using the two-fold dilution method and the minimum fungicidal concentration (MFC) was determined using the classic pour plate technique. The MFC/MIC ratio was calculated to estimate the microbicidal or microbiostatic activity. A gas chromatography mass spectrometer was used to screen the phytochemicals of the VA-C leaf extracts (ethanol, methanol, and water). Results All VA-C extracts ethanol, methanol, and water were significantly inhibited the growth of the test Candida species and the inhibition activity depended on the solvent used and the Candida species. The results showed that C. tropicalis was the most highly inhibited by all extracts followed by C. albicans and C. ciferrii. The MIC values were 12.5–25 µg/ml, and MFC values were 25–100 µg/ml. The ratios of MFC/MIC were two-fold to four-fold which was considered candidacidal activity. Ninety-five phytochemical compounds were identified by the GC-MS assay for the VA-C leaf extracts. The total number of compounds per extract differed. Methanol had 43 compounds, ethanol had 47 compounds, and water had 52 compounds. The highest compound concentrations were: 4,5-Dichloro-1,3-dioxolan-2-one in ethanol and methanol, 1H-Indene, 2,3-dihydro-1,1,2,3,3-pentamethyl in ethanol, Isobutyl 4-hydroxybenzoate in methanol, and Benzoic acid and 4-hydroxy- in water. These phytochemical compounds belong to different bioactive chemical group such as polyphenols, fatty acids, terpenes, terpenoids, steroids, aldehydes, alcohols, and esters, and most of which have anticandidal activity. Conclusions VA-C leaf extracts may be useful alternatives to anticandidal drugs, based on their effectiveness against all test Candida species at low concentrations. However, appropriate toxicology screening should be conducted before use.
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Affiliation(s)
- Ibtisam Mohammed Ababutain
- Basic & Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.,Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Azzah Ibrahim Alghamdi
- Basic & Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia.,Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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21
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Gerstein AC, Sharp NP. The population genetics of ploidy change in unicellular fungi. FEMS Microbiol Rev 2021; 45:6121427. [PMID: 33503232 DOI: 10.1093/femsre/fuab006] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/14/2021] [Indexed: 12/23/2022] Open
Abstract
Changes in ploidy are a significant type of genetic variation, describing the number of chromosome sets per cell. Ploidy evolves in natural populations, clinical populations, and lab experiments, particularly in fungi. Despite a long history of theoretical work on this topic, predicting how ploidy will evolve has proven difficult, as it is often unclear why one ploidy state outperforms another. Here, we review what is known about contemporary ploidy evolution in diverse fungal species through the lens of population genetics. As with typical genetic variants, ploidy evolution depends on the rate that new ploidy states arise by mutation, natural selection on alternative ploidy states, and random genetic drift. However, ploidy variation also has unique impacts on evolution, with the potential to alter chromosomal stability, the rate and patterns of point mutation, and the nature of selection on all loci in the genome. We discuss how ploidy evolution depends on these general and unique factors and highlight areas where additional experimental evidence is required to comprehensively explain the ploidy transitions observed in the field and the lab.
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Affiliation(s)
- Aleeza C Gerstein
- Dept. of Microbiology, Dept. of Statistics, University of Manitoba Canada
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22
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Abstract
The current article summarizes recent changes in nomenclature for fungi of medical importance published in the years 2018 to 2019, including new species and revised names for existing ones. Many of the revised names have been widely adopted without further discussion. However, those that concern common pathogens of humans may take longer to achieve general usage, with new and current names reported together to engender increasing familiarity with the correct taxonomic classification.
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23
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Jurado-Martín I, Marcos-Arias C, Tamayo E, Guridi A, de Groot PWJ, Quindós G, Eraso E. Candida duobushaemulonii: An Old But Unreported Pathogen. J Fungi (Basel) 2020; 6:E374. [PMID: 33348882 DOI: 10.3390/jof6040374] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/15/2020] [Accepted: 12/15/2020] [Indexed: 01/02/2023] Open
Abstract
Candidiasis caused by species of the Candida haemulonii complex (Candida haemulonii and Candida duobushaemulonii) and closely related species, Candida auris and Candida pseudohaemulonii are increasing. These species often show reduced susceptibility to antifungal drugs, such as azoles and amphotericin B or, less frequently, echinocandins. However, conventional phenotypic identification methods are unable to accurately differentiate these species and, therefore, their prevalence may have been underestimated. In this study, 150 isolates that were probably misidentified were reanalyzed using two novel PCR approaches. We found that one isolate previously identified in 1996 as Candida intermedia was C. duobushaemulonii, being one of the oldest isolates of this species described to date. We also found that this isolate had reduced susceptibility to fluconazole, itraconazole, and amphotericin B.
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Dias LP, Santos ALE, Araújo NMS, Silva RRS, Santos MHC, Roma RR, Rocha BAM, Oliveira JTA, Teixeira CS. Machaerium acutifolium lectin alters membrane structure and induces ROS production in Candida parapsilosis. Int J Biol Macromol 2020; 163:19-25. [PMID: 32599250 DOI: 10.1016/j.ijbiomac.2020.06.236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 01/28/2023]
Abstract
Lectins are a group of widely distributed and structurally heterogeneous proteins of nonimmune origin. These proteins have the ability to interact with glycans present on cell surfaces and elicit diverse biological activities. Machaerium acutifolium lectin (MaL) is an N-acetyl-D-glucosamine-binding lectin that exhibits antinociceptive activity via transient receptor potential cation channel subfamily V member 1 (TRPV1). Lectins that have the ability to recognize and interact with N-acetyl-D-glucosamine residues are potential candidates for studies of fungicidal activity. In this work, we show that MaL has antifungal activity against Candida species, and we describe its mode of action towards Candida parapsilosis. MaL inhibited the growth of C. albicans and C. parapsilosis. However, MaL was more potent against C. parapsilosis. The candidacidal mode of action of MaL on C. parapsilosis involves enhanced cell permeabilization, alteration of the plasma membrane proton-pumping ATPase function (H+-ATPase), induction of oxidative stress, and DNA damage. MaL also exhibited antibiofilm activity and noncytotoxicity to Vero cells. These results indicate that MaL is a promising candidate for the future development of a new, natural, and safe drug for the treatment of infections caused by C. parapsilosis.
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Affiliation(s)
- Lucas P Dias
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Ana L E Santos
- Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Chapadinha, Maranhão, Brazil
| | - Nadine M S Araújo
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Romério R S Silva
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Maria H C Santos
- Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Chapadinha, Maranhão, Brazil
| | - Renato R Roma
- Centro de Ciências Agrárias e Ambientais, Universidade Federal do Maranhão, Chapadinha, Maranhão, Brazil
| | - Bruno A M Rocha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Jose T A Oliveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil
| | - Claudener S Teixeira
- Instituto de Formação de Educadores, Universidade Federal do Cariri, Brejo Santo, Ceará, Brazil.
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25
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Abstract
Recent efforts to understand the oral microbiome have focused on its fungal component. Since fungi occupy a low proportion of the oral microbiome biomass, mycobiome studies rely on sequencing of internal transcribed spacer (ITS) amplicons. ITS-based studies usually detect hundreds of fungi in oral samples. Here, we review the oral mycobiome, critically appraising the significance of such large fungal diversity. When harsh lysis methods are used to extract DNA, 2 oral mycobiome community types (mycotypes) are evident, each dominated by only 1 genus, either Candida or Malassezia. The rest of the diversity in ITS surveys represents low-abundance fungi possibly acquired from the environment and ingested food. So far, Candida is the only genus demonstrated to reach a significant biomass in the oral cavity and clearly shown to be associated with a distinct oral ecology. Candida thrives in the presence of lower oral pH and is enriched in caries, with mechanistic studies in animal models suggesting it participates in the disease process by synergistically interacting with acidogenic bacteria. Candida serves as the main etiological agent of oral mucosal candidiasis, in which a Candida-bacteriome partnership plays a key role. The function of other potential oral colonizers, such as lipid-dependent Malassezia, is still unclear, with further studies needed to establish whether Malassezia are metabolically active oral commensals. Low-abundance oral mycobiome members acquired from the environment may be viable in the oral cavity, and although they may not play a significant role in microbiome communities, they could serve as opportunistic pathogens in immunocompromised hosts. We suggest that further work is needed to ascertain the significance of oral mycobiome members beyond Candida. ITS-based surveys should be complemented with other methods to determine the in situ biomass and metabolic state of fungi thought to play a role in the oral environment.
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Affiliation(s)
- P I Diaz
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, State University of New York, Buffalo, NY, USA.,UB Microbiome Center, University at Buffalo, State University of New York, Buffalo, NY, USA
| | - A Dongari-Bagtzoglou
- Division of Periodontology, Department of Oral Health and Diagnostic Sciences, School of Dental Medicine, UConn Health, Farmington, CT, USA
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Andrade G, Orlando HCS, Scorzoni L, Pedroso RS, Abrão F, Carvalho MTM, Veneziani RCS, Ambrósio SR, Bastos JK, Mendes-Giannini MJS, Martins CHG, Pires RH. Brazilian Copaifera Species: Antifungal Activity against Clinically Relevant Candida Species, Cellular Target, and In Vivo Toxicity. J Fungi (Basel) 2020; 6:jof6030153. [PMID: 32872100 PMCID: PMC7560146 DOI: 10.3390/jof6030153] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/20/2020] [Accepted: 08/26/2020] [Indexed: 12/16/2022] Open
Abstract
Plants belonging to the genus Copaifera are widely used in Brazil due to their antimicrobial properties, among others. The re-emergence of classic fungal diseases as a consequence of antifungal resistance to available drugs has stimulated the search for plant-based compounds with antifungal activity, especially against Candida. The Candida-infected Caenorhabditis elegans model was used to evaluate the in vitro antifungal potential of Copaifera leaf extracts and trunk oleoresins against Candida species. The Copaifera leaf extracts exhibited good antifungal activity against all Candida species, with MIC values ranging from 5.86 to 93.75 µg/mL. Both the Copaifera paupera and Copaifera reticulata leaf extracts at 46.87 µg/mL inhibited Candida glabrata biofilm formation and showed no toxicity to C. elegans. The survival of C. glabrata-infected nematodes increased at all the tested extract concentrations. Exposure to Copaifera leaf extracts markedly increased C. glabrata cell vacuolization and cell membrane damage. Therefore, Copaifera leaf extracts are potential candidates for the development of new and safe antifungal agents.
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Affiliation(s)
- Géssica Andrade
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
| | - Haniel Chadwick Silva Orlando
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
| | - Liliana Scorzoni
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14801-902, Brazil; (L.S.); (M.J.S.M.-G.)
- Science and Technology Institute of São José dos Campos (ICT), São Paulo State University (UNESP), São José dos Campos 12245-000, Brazil
| | - Reginaldo Santos Pedroso
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
- Health Technical School (ESTES), Federal University of Uberlandia, Uberlandia 38400-732, Brazil
| | - Fariza Abrão
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
| | - Marco Túlio Menezes Carvalho
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
| | - Rodrigo Cassio Sola Veneziani
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
| | - Sérgio Ricardo Ambrósio
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
| | - Jairo Kenupp Bastos
- Faculty of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto 14040-903, Brazil;
| | | | - Carlos Henrique Gomes Martins
- Institute of Biomedical Sciences (ICBIM), Federal University of Uberlandia, Uberlandia 38400-902, Brazil
- Correspondence: (C.H.G.M.); (R.H.P.); Tel.: +55-(34)-3225-8670 (C.H.G.M.); +55-(16)-3711-8945 (R.H.P.)
| | - Regina Helena Pires
- University of Franca, Franca 14404-600, Brazil; (G.A.); (H.C.S.O.); (R.S.P.); (F.A.); (M.T.M.C.); (R.C.S.V.); (S.R.A.)
- Correspondence: (C.H.G.M.); (R.H.P.); Tel.: +55-(34)-3225-8670 (C.H.G.M.); +55-(16)-3711-8945 (R.H.P.)
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Potocki L, Baran A, Oklejewicz B, Szpyrka E, Podbielska M, Schwarzbacherová V. Synthetic Pesticides Used in Agricultural Production Promote Genetic Instability and Metabolic Variability in Candida spp. Genes (Basel) 2020; 11:genes11080848. [PMID: 32722318 PMCID: PMC7463770 DOI: 10.3390/genes11080848] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/17/2020] [Accepted: 07/20/2020] [Indexed: 01/22/2023] Open
Abstract
The effects of triazole fungicide Tango® (epoxiconazole) and two neonicotinoid insecticide formulations Mospilan® (acetamiprid) and Calypso® (thiacloprid) were investigated in Candida albicans and three non-albicans species Candida pulcherrima, Candida glabrata and Candida tropicalis to assess the range of morphological, metabolic and genetic changes after their exposure to pesticides. Moreover, the bioavailability of pesticides, which gives us information about their metabolization was assessed using gas chromatography-mass spectrophotometry (GC-MS). The tested pesticides caused differences between the cells of the same species in the studied populations in response to ROS accumulation, the level of DNA damage, changes in fatty acids (FAs) and phospholipid profiles, change in the percentage of unsaturated to saturated FAs or the ability to biofilm. In addition, for the first time, the effect of tested neonicotinoid insecticides on the change of metabolic profile of colony cells during aging was demonstrated. Our data suggest that widely used pesticides, including insecticides, may increase cellular diversity in the Candida species population-known as clonal heterogeneity-and thus play an important role in acquiring resistance to antifungal agents.
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Affiliation(s)
- Leszek Potocki
- Department of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland; (A.B.); (B.O.); (E.S.); (M.P.)
- Correspondence: (L.P.); (V.S.); Tel.: +48-17-851-85-78 (L.P.); +421-905-642-367 (V.S.)
| | - Aleksandra Baran
- Department of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland; (A.B.); (B.O.); (E.S.); (M.P.)
| | - Bernadetta Oklejewicz
- Department of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland; (A.B.); (B.O.); (E.S.); (M.P.)
| | - Ewa Szpyrka
- Department of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland; (A.B.); (B.O.); (E.S.); (M.P.)
| | - Magdalena Podbielska
- Department of Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland; (A.B.); (B.O.); (E.S.); (M.P.)
| | - Viera Schwarzbacherová
- Department of Biology and Genetics, Institute of Genetics, University of Veterinary Medicine and Pharmacy in Košice, Komenského 73, 041 81 Košice, Slovak
- Correspondence: (L.P.); (V.S.); Tel.: +48-17-851-85-78 (L.P.); +421-905-642-367 (V.S.)
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Pote ST, Sonawane MS, Rahi P, Shah SR, Shouche YS, Patole MS, Thakar MR, Sharma R. Distribution of Pathogenic Yeasts in Different Clinical Samples: Their Identification, Antifungal Susceptibility Pattern, and Cell Invasion Assays. Infect Drug Resist 2020; 13:1133-1145. [PMID: 32368104 PMCID: PMC7182453 DOI: 10.2147/idr.s238002] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 02/25/2020] [Indexed: 12/27/2022] Open
Abstract
Introduction Species of genus Candida are part of the common microbiota of humans; however, some of the Candida species are known opportunistic pathogens. Formation of biofilms, resistance to antifungal drugs, and increase in asymptomatic infections demands more studies on isolation, identification and characterization of Candida from clinical samples. Methods The present manuscript deals with assessment of authentic yeast identification by three methods viz., DNA sequencing of 28S rRNA gene, protein profiles using MALDI-TOF MS, and colony coloration on chromogenic media. Antifungal susceptibility and in vitro cell invasion assays were performed to further characterize these isolates. Results Comparison of three methods showed that DNA sequence analysis correctly identified more than 99.4% of the isolates up to species level as compared to 89% by MALDI-TOF MS. In this study, we isolated a total of 176 yeasts from clinical samples and preliminary morphological characters indicated that these yeast isolates belong to the genus Candida. The species distribution of isolates was as follows: 75 isolates of Candida albicans (42.61%), 50 of C. tropicalis (28.40%), 22 of C. glabrata (12.5%), 14 of C. parapsilosis (7.95%) and 4 of Clavispora lusitaniae (2.27%). Other species like Cyberlindnera fabianii, Issatchenkia orientalis, Kluyveromyces marxianus, Kodamaea ohmeri, Lodderomyces sp., and Trichosporon asahii were less than 2%. Antifungal susceptibility assay performed with 157 isolates showed that most of the isolates were resistant to the four azoles viz., clotrimazole, fluconazole, itraconazole, and ketoconazole, and the frequency of resistance was more in non-albicans Candida isolates. The susceptibility to azole drugs ranged from 7% to 48%, while 75% of the tested yeasts were susceptible to nystatin. Moreover, 88 isolates were also tested for their capacity to invade human cells using HeLa cells. In vitro invasion assay showed that most of the C. albicans isolates showed epithelial cell invasion as compared to isolates belonging to C. glabrata, C. parapsilosis and C. tropicalis. Discussion The identification of yeasts of clinical origin by sequencing of 28S rRNA gene performed better than MALDI-TOF MS. The present study reiterates the world scenario wherein there is a shift from Candida strains to emerging opportunistic pathogens which were earlier regarded as environmental strains. The present study enlightens the current understanding of identification methods for clinical yeast isolates, increased antifungal drug resistance, epithelial cell invasion as a virulence factor, and diversity of yeasts in Indian clinical samples.
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Affiliation(s)
- Satish T Pote
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, S.P. Pune University, Pune 411 007, Maharashtra, India.,National AIDS Research Institute, Pune 411026, Maharashtra, India
| | - Mahesh S Sonawane
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, S.P. Pune University, Pune 411 007, Maharashtra, India
| | - Praveen Rahi
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, S.P. Pune University, Pune 411 007, Maharashtra, India
| | - Sunil R Shah
- Bharati Vidyapeeth Deemed University Medical College, Bharati Vidyapeeth, Pune 411043, Maharashtra, India
| | - Yogesh S Shouche
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, S.P. Pune University, Pune 411 007, Maharashtra, India
| | - Milind S Patole
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, S.P. Pune University, Pune 411 007, Maharashtra, India
| | - Madhuri R Thakar
- National AIDS Research Institute, Pune 411026, Maharashtra, India
| | - Rohit Sharma
- National Centre for Microbial Resource (NCMR), National Centre for Cell Science, NCCS Complex, S.P. Pune University, Pune 411 007, Maharashtra, India
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Fontecha G, Montes K, Ortiz B, Galindo C, Braham S. Identification of Cryptic Species of Four Candida Complexes in a Culture Collection. J Fungi (Basel) 2019; 5:E117. [PMID: 31861048 DOI: 10.3390/jof5040117] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 01/11/2023] Open
Abstract
Candida spp. are one of the most common causes of fungal infections worldwide. The taxonomy of Candida is controversial and has undergone recent changes due to novel genetically related species. Therefore, some complexes of cryptic species have been proposed. In clinical settings, the correct identification of Candida species is relevant since some species are associated with high resistance to antifungal drugs and increased virulence. This study aimed to identify the species of four Candida complexes (C. albicans, C. glabrata, C. parapsilosis, and C. haemulonii) by molecular methods. This is the first report of six cryptic Candida species in Honduras: C. dubliniensis, C. africana, C. duobushaemulonii, C. orthopsilosis, and C. metapsilosis, and it is also the first report of the allele hwp1-2 of C. albicans sensu stricto. It was not possible to demonstrate the existence of C. auris among the isolates of the C. haemulonii complex. We also propose a simple method based on PCR-RFLP for the discrimination of the multi-resistant pathogen C. auris within the C. haemulonii complex.
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30
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Hamzehee S, Kalantar-neyestanaki D, Agha Kuchak Afshari S, Ayatollahi Mousavi SA. Molecular identification of Candida species, assessment of the antifungal susceptibility and the genetic relationship of Candida albicans isolated from immunocompromised patients in Kerman, Iran. Gene Reports 2019; 17:100484. [DOI: 10.1016/j.genrep.2019.100484] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Raimondi S, Amaretti A, Gozzoli C, Simone M, Righini L, Candeliere F, Brun P, Ardizzoni A, Colombari B, Paulone S, Castagliuolo I, Cavalieri D, Blasi E, Rossi M, Peppoloni S. Longitudinal Survey of Fungi in the Human Gut: ITS Profiling, Phenotyping, and Colonization. Front Microbiol 2019; 10:1575. [PMID: 31354669 PMCID: PMC6636193 DOI: 10.3389/fmicb.2019.01575] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 06/25/2019] [Indexed: 12/20/2022] Open
Abstract
The fungal component of the intestinal microbiota of eight healthy subjects was studied over 12 months using metagenome survey and culture-based approaches. Aspergillus, Candida, Debaryomyces, Malassezia, Penicillium, Pichia, and Saccharomyces were the most recurrent and/or dominant fungal genera, according to metagenomic analysis. The biodiversity of fungal communities was lower and characterized by greater unevenness, when compared to bacterial microbiome. The dissimilarities both among subjects and over the time within the same subject suggested that most of the fungi passed through the gastro-intestinal tract (GIT) without becoming stable colonizers. Certain genera, such as Aspergillus and Penicillium, were isolated in a minority of cases, although they recurred abundantly and frequently in the metagenomics survey, likely being environmental or food-borne fungi that do not inhabit the GIT. Candida genus was recurrently detected. Candida albicans isolates dominated among the cultivable mycobiota and longitudinally persisted, likely as commensals inhabiting the intestine or regularly reaching it from Candida-colonized districts, such as the oral cavity. Other putative colonizers belonged to Candida zeylanoides, Geotrichum candidum, and Rhodotorula mucilaginosa, with persisting biotypes being identified. Phenotyping of fungal isolates indicated that C. albicans adhered to human epithelial cells more efficiently and produced greater amounts of biofilm in vitro than non-albicans Candida (NAC) and non-Candida fungi (NCF). The C. albicans isolates also induced the highest release of HBD-2 by human epithelial cells, further differing from NAC and NCF. Nine representative isolates were administered to mice to evaluate the ability to colonize the intestine. Only two out of three C. albicans strains persisted in stools of animals 2 weeks after the end of the oral administration, whereas NAC and NCF did not. These results confirm the allochthonous nature of most the intestinal fungi, while C. albicans appears to be commonly involved in stable colonization. A combination of specific genetic features in the microbe and in the host likely allow colonization from fungi normally present solely as passengers. It remains to be established if other species identified as potential colonizers, in addition to Candida, are true inhabitants of the GIT or rather reach the intestine spreading from other body districts.
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Affiliation(s)
- Stefano Raimondi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Alberto Amaretti
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Caterina Gozzoli
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Marta Simone
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Lucia Righini
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Francesco Candeliere
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Paola Brun
- Department of Molecular Medicine, University of Padua, Padua, Italy
| | - Andrea Ardizzoni
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Interest in Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Bruna Colombari
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Interest in Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Simona Paulone
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Interest in Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | - Elisabetta Blasi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Interest in Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Maddalena Rossi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Samuele Peppoloni
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Interest in Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
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Tauber JP, Childers AK, Evans JD. Draft Genome Sequence of the Yeast Kodamaea ohmeri, a Symbiont of the Small Hive Beetle. Microbiol Resour Announc 2019; 8:e00450-19. [PMID: 31248992 DOI: 10.1128/MRA.00450-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Kodamaea ohmeri is a symbiont of the small hive beetle (SHB), which is a scavenger of honey bee colonies. The SHB causes absconding of the economically important honey bee (Apis mellifera) and deposits K. ohmeri in the honeycomb. We describe long-read sequencing and further analyses of the K. ohmeri genome.
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Guarcello R, Gaglio R, Todaro A, Alfonzo A, Schicchi R, Cirlincione F, Moschetti G, Francesca N. Insights Into the Cultivable Microbial Ecology of "Manna" Ash Products Extracted From Fraxinus angustifolia ( Oleaceae) Trees in Sicily, Italy. Front Microbiol 2019; 10:984. [PMID: 31164870 PMCID: PMC6536662 DOI: 10.3389/fmicb.2019.00984] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 04/18/2019] [Indexed: 02/04/2023] Open
Abstract
Microbial communities characterizing a specific food matrix, generally, strongly contribute to both its composition, and properties for food applications. To our knowledge, this is the first study to investigate the cultivable microbial ecology of Sicilian “Manna” ash products in order to acquire new information on the hygienic quality, shelf-life and potential application of this traditional food. To this purpose, several manna samples belonging to different commercial categories were collected and subjected to the analysis of bacteria, yeasts, and filamentous fungi. Furthermore, an investigation of the sugar content and physicochemical parameters was performed. The results of our study followed the trend generally reported for other sugary foods. Conversely, as regards microbiological analyses, in the present study, the presence of microorganisms at high levels confirmed their survival in stressing conditions characterizing this food matrix in a viable and cultivable form. Most species were osmophilic, endophytic bacteria, antagonistic of fungi pathogen of plants. Yeasts were the most abundant microbial populations and a total of six species were identified: Candida aaseri, Candida lactis-condensi, Citeromyces matritensis, Lachancea thermotolerans, Saccharomyces cerevisiae, and Zygosaccharomyces bailii. Filamentous fungi included five genera, which were considered common contaminants of honey and of other foods due to their xerophilic characteristics. Interestingly, our results suggest that the strains of L. thermotolerans isolated in this study might be evaluated for their potential to act as starters either singly or in multi-combination for food applications.
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Affiliation(s)
- Rosa Guarcello
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Raimondo Gaglio
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Aldo Todaro
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Antonio Alfonzo
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Rosario Schicchi
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Fortunato Cirlincione
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Giancarlo Moschetti
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
| | - Nicola Francesca
- Dipartimento Scienze Agrarie e Forestali, Università degli Studi di Palermo, Palermo, Italy
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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] [What about the content of this article? (0)] [Affiliation(s)] [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.
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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
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Maciel NO, Johann S, Brandão LR, Kucharíková S, Morais CG, Oliveira AP, Freitas GJ, Borelli BM, Pellizzari FM, Santos DA, Van Dijck P, Rosa CA. Occurrence, antifungal susceptibility, and virulence factors of opportunistic yeasts isolated from Brazilian beaches. Mem Inst Oswaldo Cruz 2019; 114:e180566. [PMID: 30892381 PMCID: PMC6419412 DOI: 10.1590/0074-02760180566] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/15/2019] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Opportunistic pathogenic yeast species are frequently associated with water
habitats that have pollution sources of human or animal origin.
Candida albicans has already been suggested as a faecal
indicator microorganism for aquatic environments. OBJECTIVES The goal of this study was to investigate the occurrence of C.
albicans and other opportunistic yeasts in sand and seawater
samples from beaches in Brazil to assess their correlation with
Escherichia coli, and to characterise the pathogenic
potential of the yeast isolates. METHODS Opportunistic species (yeasts that grow at 37ºC) were isolated from sand and
seawater samples from eight beaches in Brazil during the summer and the
winter. Opportunistic yeast species were evaluated for their susceptibility
to antifungal drugs, virulence factors, and the in vitro
and in vivo biofilm formation. Strains were selected to
carry out virulence tests using BALB/c mice. FINDINGS Several water samples could be classified as inappropriate for primary
contact recreation in relation to E. coli densities.
C. albicans was isolated in low densities. Of the 144
opportunistic yeasts evaluated, 61% displayed resistance or dose-dependent
sensitivity to at least one tested drug, and 40% produced proteinase.
Strains of C. albicans and Kodamaea ohmeri
exhibited the highest rates of adhesion to buccal epithelial cells. All the
C. albicans strains that were tested were able to
undergo morphogenesis and form a biofilm on catheter fragments in both
in vitro and in vivo experiments. It
was possible to confirm the pathogenic potential of three of these strains
during the disseminated infection test. MAIN CONCLUSIONS The identification of opportunistic yeast species in seawater and sand
samples from Brazilian beaches suggest a potential risk to the health of
people who use these environments for recreational purposes.
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Affiliation(s)
- Natália Op Maciel
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Susana Johann
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Luciana R Brandão
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Sona Kucharíková
- VIB-KU Leuven Centre for Microbiology, Leuven, Belgium.,Institute of Botany and Microbiology, KU Leuven Laboratory of Molecular Cell Biology, Leuven, Belgium
| | - Camila G Morais
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Alexandre P Oliveira
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Gustavo Jc Freitas
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Beatriz M Borelli
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Franciane M Pellizzari
- Universidade Estadual do Paraná, Laboratório de Ficologia e Qualidade de Água Marinha, Curitiba, PR, Brasil
| | - Daniel A Santos
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
| | - Patrick Van Dijck
- VIB-KU Leuven Centre for Microbiology, Leuven, Belgium.,Institute of Botany and Microbiology, KU Leuven Laboratory of Molecular Cell Biology, Leuven, Belgium
| | - Carlos A Rosa
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Microbiologia, Belo Horizonte, MG, Brasil
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Vieira de Melo AP, Zuza-Alves DL, da Silva-Rocha WP, Ferreira Canário de Souza LB, Francisco EC, Salles de Azevedo Melo A, Maranhão Chaves G. Virulence factors of Candida spp. obtained from blood cultures of patients with candidemia attended at tertiary hospitals in Northeast Brazil. J Mycol Med 2019; 29:132-139. [PMID: 30876744 DOI: 10.1016/j.mycmed.2019.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/30/2019] [Accepted: 02/07/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND Yeasts of the Candida genus are one of the most common causes of bloodstream infections associated with high rates of morbidity and mortality, mainly affecting immunocompromised patients. We aimed to identify yeasts obtained from blood cultures of patients interned at tertiary hospitals in Brazil. METHODS We evaluated some of the major virulence factors of Candida spp., including the ability to adhere to human buccal epithelial cells, biofilm formation, hemolytic and phospholipase activity. RESULTS We analyzed 70 isolates of Candida spp. obtained from March 2011 and March 2015. Candida spp. showed different peculiarities in terms of expression of virulence factors evaluated in vitro. C. albicans strains were more adherent to HBEC than all the other Candida species. C. tropicalis strains were considered strong biofilm producers. Strains belonging to the C. parapsilosis species complex were able to produce hemolysins, while C. glabrata was also able to lyse erythrocytes and to produce phospholipase. CONCLUSION These results suggest that Non-Candida albicans Candida species are also able to express virulence factors which play an important role in bloodstream infectious caused by these yeasts.
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Affiliation(s)
- A P Vieira de Melo
- Natal City, Rio Grande do Norte, Brazil; Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Brazil
| | - D L Zuza-Alves
- Natal City, Rio Grande do Norte, Brazil; Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Brazil
| | - W P da Silva-Rocha
- Natal City, Rio Grande do Norte, Brazil; Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Brazil
| | - L B Ferreira Canário de Souza
- Natal City, Rio Grande do Norte, Brazil; Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Brazil
| | - E C Francisco
- São Paulo City, Laboratório Especial de Micologia, Federal University of São Paulo, São Paulo, Brazil
| | - A Salles de Azevedo Melo
- São Paulo City, Laboratório Especial de Micologia, Federal University of São Paulo, São Paulo, Brazil
| | - G Maranhão Chaves
- Natal City, Rio Grande do Norte, Brazil; Department of Clinical and Toxicological Analysis, Federal University of Rio Grande do Norte, Brazil.
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Sharma J, Rosiana S, Razzaq I, Shapiro RS. Linking Cellular Morphogenesis with Antifungal Treatment and Susceptibility in Candida Pathogens. J Fungi (Basel) 2019; 5:E17. [PMID: 30795580 PMCID: PMC6463059 DOI: 10.3390/jof5010017] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/11/2019] [Accepted: 02/13/2019] [Indexed: 02/07/2023] Open
Abstract
Fungal infections are a growing public health concern, and an increasingly important cause of human mortality, with Candida species being amongst the most frequently encountered of these opportunistic fungal pathogens. Several Candida species are polymorphic, and able to transition between distinct morphological states, including yeast, hyphal, and pseudohyphal forms. While not all Candida pathogens are polymorphic, the ability to undergo morphogenesis is linked with the virulence of many of these pathogens. There are also many connections between Candida morphogenesis and antifungal drug treatment and susceptibility. Here, we review how Candida morphogenesis-a key virulence trait-is linked with antifungal drugs and antifungal drug resistance. We highlight how antifungal therapeutics are able to modulate morphogenesis in both sensitive and drug-resistant Candida strains, the shared signaling pathways that mediate both morphogenesis and the cellular response to antifungal drugs and drug resistance, and the connection between Candida morphology, drug resistance, and biofilm growth. We further review the development of anti-virulence drugs, and targeting Candida morphogenesis as a novel therapeutic strategy to target fungal pathogens. Together, this review highlights important connections between fungal morphogenesis, virulence, and susceptibility to antifungals.
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Affiliation(s)
- Jehoshua Sharma
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.
| | - Sierra Rosiana
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.
| | - Iqra Razzaq
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.
| | - Rebecca S Shapiro
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.
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Rath S, Das SR, Padhy RN. Bayesian analysis of two methods MALDI-TOF-MS system and culture test in otomycosis infection. World J Otorhinolaryngol Head Neck Surg 2019; 5:6-13. [PMID: 30775695 PMCID: PMC6364575 DOI: 10.1016/j.wjorl.2018.03.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 07/19/2017] [Accepted: 03/21/2018] [Indexed: 01/28/2023] Open
Abstract
Objective Identification of otomycotic fungi using matrix-assisted laser desorption ionization (MALDI) time of flight (TOF) mass spectroscopy (MS) and to quantify pervasive errors with Bayes rule; values of sensitivity and specificity of culture test and MALDI-TOF-MS method are quantified. Method Fungi cultured ear discharge samples were identified with culture test and MALDI-TOF-MS system. Minimum inhibitory concentration (MIC) or MEC (minimum effective concentration) for 6 antifungals were determined by antifungal susceptibility testing in vitro. With Bayes rule, sensitivity and specificity of both MALDI-TOF MS and culture test methods were computed. Results Cultures yielded 42 fungal isolates which were confirmed as species (specified against each species) belonging to 8 genera, A. niger 22, Candida sp. 7, A. fumigatus 3, A. flavus 3, mixed Aspergillus sp. 3, Mucor sp. 2, Rhizopus sp. 1, and Scopulariopsis sp.1; and MALDI-TOF-MS system also confirmed those isolates. In vitro antifungal susceptibility testing with terms of MIC 50 and MIC 90, isolates fungi were highly susceptible to 6 antifungals; and caspofungin was the most active antifungal. The high value of specificity 84.6%, suggested a limited loss of confidence on the culture test at the absence of an infection, in comparison to MALDI-TOF-MS. Sensitivity of the culture test was 87.5%; this high figure strongly approves the culture test to be the dependable method for the otomycosis diagnosis, when the infection is stable. Conclusion Based on sensitivity and specificity together the culture test could be done in face of the gold-standard MALDI-TOF-MS system the estimating both methods.
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Affiliation(s)
- Sibanarayan Rath
- Central Research Laboratory, Institute of Medical Sciences and Sum Hospital, Siksha 'O' Anusandhan University, Odisha, India
| | - Saumya Ranjan Das
- Department of Ear Nose and Throat, Institute of Medical Sciences and Sum Hospital, Siksha 'O' Anusandhan University, Odisha, India
| | - Rabindra Nath Padhy
- Central Research Laboratory, Institute of Medical Sciences and Sum Hospital, Siksha 'O' Anusandhan University, Odisha, India
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Hovhannisyan H, Gabaldón T. Transcriptome Sequencing Approaches to Elucidate Host-Microbe Interactions in Opportunistic Human Fungal Pathogens. Curr Top Microbiol Immunol 2019; 422:193-235. [PMID: 30128828 DOI: 10.1007/82_2018_122] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Infections caused by opportunistic human fungal pathogens are a source of increasing medical concern, due to their growing incidence, the emergence of novel pathogenic species, and the lack of effective diagnostics tools. Fungal pathogens are phylogenetically diverse, and their virulence mechanisms can differ widely across species. Despite extensive efforts, the molecular bases of virulence in pathogenic fungi and their interactions with the human host remain poorly understood for most species. In this context, next-generation sequencing approaches hold the promise of helping to close this knowledge gap. In particular, high-throughput transcriptome sequencing (RNA-Seq) enables monitoring the transcriptional profile of both host and microbes to elucidate their interactions and discover molecular mechanisms of virulence and host defense. Here, we provide an overview of transcriptome sequencing techniques and approaches, and survey their application in studying the interplay between humans and fungal pathogens. Finally, we discuss novel RNA-Seq approaches in studying host-pathogen interactions and their potential role in advancing the clinical diagnostics of fungal infections.
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Affiliation(s)
- Hrant Hovhannisyan
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
| | - Toni Gabaldón
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.
- Universitat Pompeu Fabra, Barcelona, Spain.
- Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain.
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de Cássia Orlandi Sardi J, Silva DR, Soares Mendes-Giannini MJ, Rosalen PL. Candida auris: Epidemiology, risk factors, virulence, resistance, and therapeutic options. Microb Pathog 2018; 125:116-121. [DOI: 10.1016/j.micpath.2018.09.014] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 09/01/2018] [Accepted: 09/07/2018] [Indexed: 10/28/2022]
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Kianipour S, Ardestani ME, Dehghan P. Identification of Candida albicans and Candida dubliniensis Species Isolated from Bronchoalveolar Lavage Samples Using Genotypic and Phenotypic Methods. Adv Biomed Res 2018; 7:66. [PMID: 29862215 PMCID: PMC5952538 DOI: 10.4103/abr.abr_138_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background Candida dubliniensis is a newly diagnosed species very similar to Candida albicans phenotypically and first discovered in the mouth of people with AIDS in 1995. Among the different phenotypic and genotypic methods, a cost-effective method should be selected which makes it possible to differentiate these similar species. Materials and Methods Polymerase chain reaction (PCR)-restriction fragment length polymorphism with MspI enzyme and the Duplex-PCR method were done by DNA extraction using boiling. The sequencing of the amplified ribosomal region was used to confirm the C. dubliniensis species. Direct examination and colony count of the yeasts were applied for bronchoalveolar lavage (BAL) samples and the growth rate of the yeasts were studied at 45°C. To understand the ability formation of chlamydoconidia in yeast isolates, they were separately cultured on the sunflower seed agar, wheat flour agar, and corn meal agar media. Results Fifty-nine (49.2%) yeast colonies were identified from the total of 120 BAL specimens. Twenty-nine isolated yeasts; including 17 (58.6%) of C. albicans/dubliniensis complex and 12 (41.4%) of nonalbicans isolates produced pseudohypha or blastoconidia in direct smear with a mean colony count of 42000 CFU/mL. C. albicans with the frequency of 15 (42.9%) were the most common isolated yeasts, whereas C. dubliniensis was identified in two nonHIV patients. Conclusion Sequencing of the replicated gene fragment is the best method for identifying the yeasts, but the determination of the species by phenotypic methods such as the creation of chlamydoconidia in sunflower seeds agar and wheat flour agar media can be cost-effective, have sensitivity and acceptable quality.
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Affiliation(s)
- Sahar Kianipour
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohammad Emami Ardestani
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Parvin Dehghan
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Berrio I, Maldonado N, De Bedout C, Arango K, Cano LE, Valencia Y, Jiménez-Ortigosa C, Perlin DS, Gómez BL, Robledo C, Robledo J. Comparative study of Candida spp. isolates: Identification and echinocandin susceptibility in isolates obtained from blood cultures in 15 hospitals in Medellín, Colombia. J Glob Antimicrob Resist 2017; 13:254-260. [PMID: 29183771 DOI: 10.1016/j.jgar.2017.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 10/04/2017] [Accepted: 11/20/2017] [Indexed: 01/02/2023] Open
Abstract
OBJECTIVES Invasive candidiasis has a high impact on morbidity and mortality in hospitalised patients. Accurate and timely methods for identification of Candida spp. and determination of echinocandin susceptibility have become a priority for clinical microbiology laboratories. METHODS This study was performed to compare matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF/MS) identification with sequencing of the D1/D2 region of the rRNA gene complex 28 subunit in 147 Candida spp. isolates obtained from patients with candidaemia. Antimicrobial susceptibility testing was performed by broth microdilution (BMD) and Etest. Sequencing of the FKS1 and FKS2 genes was performed. RESULTS The most common species isolated were Candida albicans (40.8%), followed by Candida parapsilosis (23.1%) and Candida tropicalis (17.0%). Overall agreement between the results of identification by MALDI-TOF/MS and molecular identification was 99.3%. Anidulafungin and caspofungin susceptibility by the BMD method was 98.0% and 88.4%, respectively. Susceptibility to anidulafungin and caspofungin by Etest was 93.9% and 98.6%, respectively. Categorical agreement between Etest and BMD was 91.8% for anidulafungin and 89.8% for caspofungin, with lower agreements in C. parapsilosis for anidulafungin (76.5%) and C. glabrata for caspofungin (40.0%). No mutations related to resistance were found in the FKS genes, although 54 isolates presented synonymous polymorphisms in the hotspots sequenced. CONCLUSIONS MALDI-TOF/MS is a good alternative for routine identification of Candida spp. isolates. DNA sequencing of the FKS genes suggested that the isolates analysed were susceptible to echinocandins; alternatively, unknown resistance mechanisms or limitations related to antifungal susceptibility tests may explain the resistance found in a few isolates.
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Affiliation(s)
- Indira Berrio
- Clínica El Rosario, Carrera 41 #62-5, Medellín, Colombia; Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia; Hospital general de Medellín "Luz Castro de Gutierrez" ESE, Carrera 48 # 32-102, Medellín, Colombia
| | - Natalia Maldonado
- Laboratorio Médico de Referencia, Calle 63 No. 41-27, Medellín, Colombia.
| | - Catalina De Bedout
- Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia
| | - Karen Arango
- Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia
| | - Luz Elena Cano
- Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia; Microbiology School, Universidad de Antioquia (UdeA), Cl. 67 #53-108, Medellín, Colombia
| | - Yorlady Valencia
- Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia
| | - Cristina Jiménez-Ortigosa
- Public Health Research Institute, New Jersey Medical School, Rutgers University, 225 Warren Street, Newark, NJ, USA
| | - David S Perlin
- Public Health Research Institute, New Jersey Medical School, Rutgers University, 225 Warren Street, Newark, NJ, USA
| | - Beatriz L Gómez
- Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia; School of Medicine and Health Sciences, Universidad Rosario, Calle 12C No. 6-25, Bogotá, Colombia
| | - Carlos Robledo
- Laboratorio Médico de Referencia, Calle 63 No. 41-27, Medellín, Colombia
| | - Jaime Robledo
- Corporación para Investigaciones Biológicas (CIB), Cra. 72 A No. 78 B 141, Medellín, Colombia; Laboratorio Médico de Referencia, Calle 63 No. 41-27, Medellín, Colombia; School of Health Sciences, Universidad Pontificia Bolivariana (UPB), Calle 78b No. 72a-109, Medellín, Colombia
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Dudiuk C, Theill L, Gamarra S, Garcia-effron G. Detection of Cryptic Candida Species Recognized as Human Pathogens Through Molecular Biology Techniques. Curr Fungal Infect Rep 2017; 11:176-83. [DOI: 10.1007/s12281-017-0294-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Karstrup CC, Aalbæk B, Klitgaard K, Jensen TK, Pedersen HG, Agerholm JS. Colonization of the bovine uterus by Candida kefyr. Acta Vet Scand 2017; 59:61. [PMID: 28915910 PMCID: PMC5603010 DOI: 10.1186/s13028-017-0329-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/09/2017] [Indexed: 11/23/2022] Open
Abstract
Background While fungal infections of the bovine uterus are well-known diseases in pregnant cattle, very limited knowledge exists on the presence and significance of fungi in the uterus of non-pregnant cows. Presence of fungi in the uterine lumen of postpartum (pp) cows has been reported, but little attention has been paid to this as most studies of the bovine pp uterus have focused on bacteria. Case presentation Microscopy of uterine lavage cytology slides of three cows from one herd revealed the presence of numerous yeast-like organisms, which were located either free in the fluid or within macrophages. Two of the cows were around 30 days pp, while the third was 7 months pp. None of the cows had been treated with antibiotics. Culturing of the flush samples was unsuccessful, but Sanger sequencing of DNA extracted from an endometrial biopsy of one of the cows revealed the presence of Candida kefyr (Kluyveromyces marxianus). Fluorescence in situ hybridization examination of endometrial tissue sections of two cows using probes targeting 18S rRNA of the K. marxianus group was performed and revealed the presence of yeast cells on the endometrium. Histology was performed and demonstrated hyphal and non-hyphal yeast-like organisms on the surface of endometrium and in the crypts. Tissue invasion was restricted to the superficial part of the epithelium and although endometrial inflammation was present, this was mild and considered as not being caused by the fungi. One of the cows became pregnant and delivered a normal calf at term, while the two others were not bred. Conclusions Candida kefyr is commonly isolated from milk of cows with mastitis, but has not been reported in association with other diseases of cattle. The infection was present as a monoculture in all three cows, but the fungi had only colonized the uterine lumen and the endometrial surface. Only a mild non-suppurative endometrial inflammation was present, but within the uterine luminal content, many macrophages having phagocytized yeast cells were present. Re-examination of the cows did not reveal a persistent infection, so the infection probably resolved spontaneously. Electronic supplementary material The online version of this article (doi:10.1186/s13028-017-0329-5) contains supplementary material, which is available to authorized users.
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Kieliszek M, Kot AM, Bzducha-Wróbel A, BŁażejak S, Gientka I, Kurcz A. Biotechnological use of Candida yeasts in the food industry: A review. FUNGAL BIOL REV 2017. [DOI: 10.1016/j.fbr.2017.06.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Al-Sweih N, Ahmad S, Khan S, Khan Z, Joseph L, Vayalil S, Chandy R. Persistent Candida conglobata bloodstream infection in a preterm neonate successfully treated by combination therapy with amphotericin B and caspofungin. J Mycol Med 2017; 27:271-6. [PMID: 28189376 DOI: 10.1016/j.mycmed.2017.01.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/15/2016] [Accepted: 01/12/2017] [Indexed: 12/27/2022]
Abstract
Fungemia due to uncommon/rare Candida species is an emerging problem of global clinical significance. Here, we describe a case of Candida conglobata bloodstream infection in a preterm neonate. The diagnosis was established by repeated isolation of C. conglobata in blood cultures and by detection of rDNA of the fungus in serum samples. The identity of the isolate as C. conglobata was confirmed by sequencing of ITS region and D1/D2 domains of rDNA. Despite initial treatment with a liposomal amphotericin B (AmBisome) for 7 days, the blood culture remained positive. The neonate was successfully treated by combination therapy with caspofungin for 25 days. To the best of our knowledge, this is the first proven report unequivocally proving the etiologic role of C. conglobata in bloodstream infection.
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Abstract
Saccharomycotina comprises a diverse group of yeasts that includes numerous species of industrial or clinical relevance. Opportunistic pathogens within this clade are often assigned to the genus Candida but belong to phylogenetically distant lineages that also comprise non-pathogenic species. This indicates that the ability to infect humans has evolved independently several times among Saccharomycotina. Although the mechanisms of infection of the main groups of Candida pathogens are starting to be unveiled, we still lack sufficient understanding of the evolutionary paths that led to a virulent phenotype in each of the pathogenic lineages. Deciphering what genomic changes underlie the evolutionary emergence of a virulence trait will not only aid the discovery of novel virulence mechanisms but it will also provide valuable information to understand how new pathogens emerge, and what clades may pose a future danger. Here we review recent comparative genomics efforts that have revealed possible evolutionary paths to pathogenesis in different lineages, focusing on the main three agents of candidiasis worldwide: Candida albicans, C. parapsilosis and C. glabrata We will discuss what genomic traits may facilitate the emergence of virulence, and focus on two different genome evolution mechanisms able to generate drastic phenotypic changes and which have been associated to the emergence of virulence: gene family expansion and interspecies hybridization.
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Affiliation(s)
- Toni Gabaldón
- Department of Bioinformatics and Genomics, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, 08010 Barcelona, Spain
| | - Miguel A Naranjo-Ortíz
- Department of Bioinformatics and Genomics, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
| | - Marina Marcet-Houben
- Department of Bioinformatics and Genomics, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Spain Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
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Grenfell RC, da Silva Junior AR, Del Negro GMB, Munhoz RB, Gimenes VMF, Assis DM, Rockstroh AC, Motta AL, Rossi F, Juliano L, Benard G, de Almeida Júnior JN. Identification of Candida haemulonii Complex Species: Use of ClinProTools(TM) to Overcome Limitations of the Bruker Biotyper(TM), VITEK MS(TM) IVD, and VITEK MS(TM) RUO Databases. Front Microbiol 2016; 7:940. [PMID: 27379069 PMCID: PMC4909767 DOI: 10.3389/fmicb.2016.00940] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 06/01/2016] [Indexed: 11/13/2022] Open
Abstract
Candida haemulonii is now considered a complex of two species and one variety: C. haemulonii sensu stricto, Candida duobushaemulonii and the variety C. haemulonii var. vulnera. Identification (ID) of these species is relevant for epidemiological purposes and for therapeutic management, but the different phenotypic commercial systems are unable to provide correct species ID for these emergent pathogens. Hence, we evaluated the MALDI-TOF MS performance for the ID of C. haemulonii species, analyzing isolates/strains of C. haemulonii complex species, Candida pseudohaemulonii and Candida auris by two commercial platforms, their databases and softwares. To differentiate C. haemulonii sensu sctricto from the variety vulnera, we used the ClinProToolsTM models and a single-peak analysis with the software FlexAnalysisTM. The BiotyperTM database gave 100% correct species ID for C. haemulonii sensu stricto, C. pseudohaemulonii and C. auris, with 69% of correct species ID for C. duobushaemulonii. Vitek MSTM IVD database gave 100% correct species ID for C. haemulonii sensu stricto, misidentifying all C. duobushaemulonii and C. pseudohaemulonii as C. haemulonii, being unable to identify C. auris. The Vitek MSTM RUO database needed to be upgraded with in-house SuperSpectra to discriminate C. haemulonii sensu stricto, C. duobushaemulonii, C. pseudohaemulonii, and C. auris strains/isolates. The generic algorithm model from ClinProToolsTM software showed recognition capability of 100% and cross validation of 98.02% for the discrimination of C. haemulonii sensu stricto from the variety vulnera. Single-peak analysis showed that the peaks 5670, 6878, or 13750 m/z can distinguish C. haemulonii sensu stricto from the variety vulnera.
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Affiliation(s)
- Rafaella C Grenfell
- Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de São Paulo São Paulo, Brazil
| | - Afonso R da Silva Junior
- Central Laboratory Division - LIM-03, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo São Paulo, Brazil
| | - Gilda M B Del Negro
- Laboratory of Medical Mycology - LIM-53, Hospital das Clínicas FMUSP and Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo São Paulo, Brazil
| | - Regina B Munhoz
- Central Laboratory Division - LIM-03, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo São Paulo, Brazil
| | - Viviane M F Gimenes
- Laboratory of Medical Mycology - LIM-53, Hospital das Clínicas FMUSP and Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo São Paulo, Brazil
| | | | | | - Adriana L Motta
- Central Laboratory Division - LIM-03, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo São Paulo, Brazil
| | - Flavia Rossi
- Central Laboratory Division - LIM-03, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo São Paulo, Brazil
| | - Luiz Juliano
- Department of Biophysics, Escola Paulista de Medicina, Universidade Federal de São Paulo São Paulo, Brazil
| | - Gil Benard
- Laboratory of Medical Mycology - LIM-53, Hospital das Clínicas FMUSP and Instituto de Medicina Tropical de São Paulo, Universidade de São Paulo São Paulo, Brazil
| | - João N de Almeida Júnior
- Central Laboratory Division - LIM-03, Hospital das Clínicas da Faculdade de Medicina, Universidade de São PauloSão Paulo, Brazil; Laboratory of Medical Mycology - LIM-53, Hospital das Clínicas FMUSP and Instituto de Medicina Tropical de São Paulo, Universidade de São PauloSão Paulo, Brazil
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50
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Rizzato C, Lombardi L, Zoppo M, Lupetti A, Tavanti A. Pushing the Limits of MALDI-TOF Mass Spectrometry: Beyond Fungal Species Identification. J Fungi (Basel) 2015; 1:367-83. [PMID: 29376916 DOI: 10.3390/jof1030367] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 10/05/2015] [Accepted: 10/07/2015] [Indexed: 12/12/2022] Open
Abstract
Matrix assisted laser desorption ionization time of flight (MALDI-TOF) is a powerful analytical tool that has revolutionized microbial identification. Routinely used for bacterial identification, MALDI-TOF has recently been applied to both yeast and filamentous fungi, confirming its pivotal role in the rapid and reliable diagnosis of infections. Subspecies-level identification holds an important role in epidemiological investigations aimed at tracing virulent or drug resistant clones. This review focuses on present and future applications of this versatile tool in the clinical mycology laboratory.
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