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Aboutalebian S, Nikmanesh B, Mohammadpour M, Charsizadeh A, Mirhendi H. Candida palmioleophila candidemia and bacterial co-infection in a 3-month-old infant with biliary atresia. Front Cell Infect Microbiol 2023; 13:1277607. [PMID: 38029248 PMCID: PMC10652749 DOI: 10.3389/fcimb.2023.1277607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/23/2023] [Indexed: 12/01/2023] Open
Abstract
Candidemia caused by rare and uncommon Candida species is becoming more prevalent in pediatric healthcare settings, resulting in significant morbidity and mortality. One such species, Candida palmioleophila, is resistant to fluconazole but highly susceptible to echinocandins. Here, we report the first documented case of C. palmioleophila candidemia in Iran that occurred in a male infant with biliary atresia who had been hospitalized for 2 months. The patient's blood and urine cultures were positive for both yeast and bacterial species. Through DNA sequence analysis, the yeast isolate was identified as C. palmioleophila. In vitro antifungal susceptibility testing of the isolate against amphotericin B, fluconazole, itraconazole, voriconazole, isavuconazole, posaconazole, and nystatin revealed MIC values of 2, 16, 0.25, 0.0625, 0.125, 0.25, and 4 μg/mL, respectively, and minimum effective concentration for caspofungin was 0.031 μg/mL. Despite receiving antibacterial and antifungal therapies, the patient unfortunately expired due to bradycardia and hypoxemia. Proper identification and epidemiological surveillance studies are needed to understand the exact prevalence of these emerging yeast pathogens. Previously reported cases of C. palmioleophila infection, primarily associated with bloodstream infections and catheter-related candidemia, were reviewed.
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Affiliation(s)
- Shima Aboutalebian
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- Mycology Reference Laboratory, Research Core Facilities Laboratory, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Bahram Nikmanesh
- Department of Medical Laboratory Science, School of Allied Medical Science, Tehran University of Medical Science, Tehran, Iran
- Zoonoses Research Centre, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Mohammadpour
- Pediatric Intensive Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Arezoo Charsizadeh
- Immunology, Asthma, and Allergy Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Mirhendi
- Department of Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
- Mycology Reference Laboratory, Research Core Facilities Laboratory, Isfahan University of Medical Sciences, Isfahan, Iran
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Wu N, Wu Y, Chu Y, Ren Z, Li H, Rong C, Yang M, Jiang N, Jiang Y, Chen J, Zhang J, Tian S. The first rare case of Candida palmioleophila infection reported in China and its genomic evolution in a human host environment. Front Microbiol 2023; 14:1165721. [PMID: 37664129 PMCID: PMC10469324 DOI: 10.3389/fmicb.2023.1165721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 07/13/2023] [Indexed: 09/05/2023] Open
Abstract
Introduction Candida palmioleophila is a rare human pathogenic fungus, which has been poorly characterized at the genome level. In this study, we reported the first fatal case of C. palmioleophila infection in China and investigate the microevolution of C. palmioleophila in the human host environment. Methods A series of C. palmioleophila stains were collected from the patient at different time points for routine microbial and drug sensitivity testing. The first C. palmioleophila isolate 07202534 was identified by de novo whole genome sequencing. The in vitro and in vivo genetic evolutionary characteristics of C. palmioleophila were discussed based on the analysis of bioinformatics data. Results The six C. palmioleophila isolates displayed dose-dependent sensitivity to fluconazole. The C. palmioleophila genome contained homologous genes such as CDR1 and MDR1, which were recognized to be related to azole resistance. In addition, amino acid variation was detected at F105L and other important sites of ERG11. In addition, the mean divergence time between C. palmioleophila and Scheffersomyces stipites CBS 6054 was 406.04 million years, indicating that C. palmioleophila originated earlier than its closest relative. In addition, the six strains of C. palmioleophila isolated form the patient had higher homology and fewer mutation sites, which indicated the stability in C. palmioleophila genome. We also found that C. palmioleophila had a wide natural niche and may evolve slowly. Discussion We believe that this study will contribute to improve our understanding of the genetic evolution, pathogenicity, and drug resistance of C. palmioleophila and will aid in the prevention and control of its spread.
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Affiliation(s)
- Na Wu
- Department of Infectious Diseases, The First Hospital of China Medical University, Shenyang, China
| | - Yusheng Wu
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Yunzhuo Chu
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Zhihui Ren
- Department of Intensive Care Unit, Shenyang Fourth People’s Hospital of China Medical University, Shenyang, China
| | - Hailong Li
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Chen Rong
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Min Yang
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Ning Jiang
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Yanyan Jiang
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Jingjing Chen
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Jingping Zhang
- Department of Infectious Diseases, The First Hospital of China Medical University, Shenyang, China
| | - Sufei Tian
- National Clinical Research Center for Laboratory Medicine, Department of Laboratory Medicine, The First Hospital of China Medical University, Shenyang, China
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Sidrim JJC, de Maria GL, Paiva MDAN, Araújo GDS, da Graça-Filho RV, de Oliveira JS, Sales JA, Pereira-Neto WA, Guedes GMDM, Castelo-Branco DDSCM, Cordeiro RDA, Brilhante RSN, Rocha MFG. Azole-Resilient Biofilms and Non-wild Type C. albicans Among Candida Species Isolated from Agricultural Soils Cultivated with Azole Fungicides: an Environmental Issue? MICROBIAL ECOLOGY 2021; 82:1080-1083. [PMID: 33723620 DOI: 10.1007/s00248-021-01694-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
This study aimed to identify Candida spp. from agricultural soils cultivated with azole fungicides and investigate their susceptibility to clinical (fluconazole, itraconazole, voriconazole, and amphotericin B) and agricultural (tetraconazole and tebuconazole) antifungals in planktonic form. Additionally, Candida biofilm-forming ability and biofilm susceptibility to agricultural antifungals and voriconazole were analyzed. Species identification was performed by phenotypic and molecular assays. The susceptibility of planktonic cells was evaluated by the broth microdilution method. The biofilm metabolic activity was evaluated by the XTT reduction assay. The recovered Candida spp. were identified as C. parapsilosis sensu stricto (n = 14), C. albicans (n = 5), C. tropicalis (n = 2), C. fermentati (n = 1), and C. metapsilosis (n = 2). Minimum inhibitory concentration ranges for clinical and agricultural antifungals were ≤ 0.03-4 μg/mL and 1-128 μg/mL, respectively. Two and one C. albicans strains were considered non-wild type for voriconazole and fluconazole, respectively. All strains were biofilm producers. The minimum biofilm inhibitory concentration ranges for tetraconazole and tebuconazole were 128-> 1024 μg/mL, while for voriconazole was 512-> 1024 μg/mL. In summary, this study shows that non-wild type and azole-resilient biofilm-producing Candida species colonize agricultural soils cultivated with azole fungicides.
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Affiliation(s)
- José Júlio Costa Sidrim
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Gerlane Luziana de Maria
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Manoel de Araújo Neto Paiva
- Laboratory of Environmental Biology and Microbiology, Degree in Biological Sciences, Federal Institute of Education, Science and Technology of Ceará, Avenida Des. Armando de Souza-Buriti, Acaraú, Ceará, CEP: 62580-000, Brazil
| | - Géssica Dos Santos Araújo
- Postgraduate Program in Veterinary Sciences, School of Veterinary, State University of Ceará, Dr. Silas Munguba, 1700, Campus do Itaperi, Fortaleza, Ceará, CEP: 60714-903, Brazil
| | - Renan Vasconcelos da Graça-Filho
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Jonathas Sales de Oliveira
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Jamille Alencar Sales
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Waldemiro Aquino Pereira-Neto
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Glaucia Morgana de Melo Guedes
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Débora de Souza Collares Maia Castelo-Branco
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Rossana de Aguiar Cordeiro
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
| | - Raimunda Sâmia Nogueira Brilhante
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil.
| | - Marcos Fábio Gadelha Rocha
- Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Department of Pathology and Legal Medicine, Federal University of Ceará, Rua Coronel Nunes de Melo, 1315-Rodolfo Teófilo, Fortaleza, Ceará, CEP: 60430-275, Brazil
- Postgraduate Program in Veterinary Sciences, School of Veterinary, State University of Ceará, Dr. Silas Munguba, 1700, Campus do Itaperi, Fortaleza, Ceará, CEP: 60714-903, Brazil
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Gabaldón T. Recent trends in molecular diagnostics of yeast infections: from PCR to NGS. FEMS Microbiol Rev 2019; 43:517-547. [PMID: 31158289 PMCID: PMC8038933 DOI: 10.1093/femsre/fuz015] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 05/31/2019] [Indexed: 12/29/2022] Open
Abstract
The incidence of opportunistic yeast infections in humans has been increasing over recent years. These infections are difficult to treat and diagnose, in part due to the large number and broad diversity of species that can underlie the infection. In addition, resistance to one or several antifungal drugs in infecting strains is increasingly being reported, severely limiting therapeutic options and showcasing the need for rapid detection of the infecting agent and its drug susceptibility profile. Current methods for species and resistance identification lack satisfactory sensitivity and specificity, and often require prior culturing of the infecting agent, which delays diagnosis. Recently developed high-throughput technologies such as next generation sequencing or proteomics are opening completely new avenues for more sensitive, accurate and fast diagnosis of yeast pathogens. These approaches are the focus of intensive research, but translation into the clinics requires overcoming important challenges. In this review, we provide an overview of existing and recently emerged approaches that can be used in the identification of yeast pathogens and their drug resistance profiles. Throughout the text we highlight the advantages and disadvantages of each methodology and discuss the most promising developments in their path from bench to bedside.
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Affiliation(s)
- Toni Gabaldón
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr Aiguader 88, Barcelona 08003, Spain
- Universitat Pompeu Fabra (UPF), 08003 Barcelona, Spain
- ICREA, Pg Lluís Companys 23, 08010 Barcelona, Spain
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Abstract
PURPOSE OF REVIEW To describe the epidemiology, strategies for early detection, and clinical management of infections caused by the most commonly found multidrug-resistant (MDR) Candida spp. RECENT FINDINGS Increasing numbers of reports describing invasive infections by MDR Candida auris and Candida glabrata has been reported in medical centers worldwide. SUMMARY We checked all papers published along the last 10 years describing epidemiological, diagnostic, and clinical aspects of infections by MDR Candida spp., with emphasis on C. auris and C. glabrata spp. C. auris has been reported in 15 countries and multidrug resistance rates is usually above 30%. Horizontal transmission is a great concern regarding C. auris. C. glabrata ranks the second most reported Candida spp. in deep-seated infections from United States and some European Centers, although multidrug resistance rates above 10% are restricted to some US centers. Candida haemulonii complex isolates with poor susceptibility to azoles and amphotericin B have been isolated in superficial and deep-seated infections, whereas Candida guilliiermondii complex isolates with poor susceptibility to azoles and echinocandins have been recovered from catheter-related bloodstream infections. Other potential MDR Candida species are Candida krusei, Candida lusitaniae, Candida kefyr, Yarrowia (Candida) lypolitica, and Candida rugosa.
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Brilhante RSN, Silva ALD, Monteiro FOB, Guedes GMDM, Sales JA, Oliveira JSD, Maia Junior JE, Miranda SA, Sidrim JJC, Alencar LPD, Castelo-Branco DSCM, Cordeiro RDA, Pereira Neto WDA, Rocha MFG. Yeasts from Scarlet ibises (Eudocimus ruber): A focus on monitoring the antifungal susceptibility of Candida famata and closely related species. Med Mycol 2018; 55:725-732. [PMID: 28204651 DOI: 10.1093/mmy/myw144] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 01/17/2017] [Indexed: 11/12/2022] Open
Abstract
This study aimed to identify yeasts from the gastrointestinal tract of scarlet ibises (Eudocimus ruber) and from plant material collected from the environment where they live. Then, the isolates phenotypically identified as Candida famata were submitted to molecular identification of their closely related species and evaluated for their antifungal susceptibility and possible resistance mechanisms to antifungal drugs. Cloacal swabs from 20 scarlet ibises kept in captivity at Mangal das Garças Park (Brazil), pooled stool samples (n = 20) and samples of trunks and hollow of trees (n = 20) obtained from their enclosures were collected. The samples were seeded on Sabouraud agar supplemented with chloramphenicol. The 48 recovered isolates were phenotypically identified as 15 Candida famata, 13 Candida catenulata, 2 Candida intermedia, 1 Candida lusitaniae, 2 Candida guilliermondii, 1 Candida kefyr, 1 Candida amapae, 1 Candida krusei, 8 Trichosporon spp., and 4 Rhodotorula spp. The C. famata isolates were further identified as 3 C. famata, 8 Debaryomyces nepalensis, and 4 C. palmioleophila. All C. famata and C. palmioleophila were susceptible to caspofungin and itraconazole, while one D. nepalensis was resistant to fluconazole and voriconazole. This same isolate and another D. nepalensis had lower amphotericin B susceptibility. The azole resistant strain had an increased efflux of rhodamine 6G and an alteration in the membrane sterol content, demonstrating multifactorial resistance mechanism. Finally, this research shows that scarlet ibises and their environment harbor C. famata and closely related species, including antifungal resistant isolates, emphasizing the need of monitoring the antifungal susceptibility of these yeast species.
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Affiliation(s)
- Raimunda Sâmia Nogueira Brilhante
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Aline Lobão da Silva
- Posgraduate Program in Veterinary Sciences, School of Veterinary Medicine, State University of Ceará, Fortaleza, Ceará, Brazil
| | | | - Glaucia Morgana de Melo Guedes
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Jamille Alencar Sales
- Posgraduate Program in Veterinary Sciences, School of Veterinary Medicine, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Jonathas Sales de Oliveira
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - José Erisvaldo Maia Junior
- Posgraduate Program in Veterinary Sciences, School of Veterinary Medicine, State University of Ceará, Fortaleza, Ceará, Brazil
| | | | - José Júlio Costa Sidrim
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Lucas Pereira de Alencar
- Posgraduate Program in Veterinary Sciences, School of Veterinary Medicine, State University of Ceará, Fortaleza, Ceará, Brazil
| | | | - Rossana de Aguiar Cordeiro
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Waldemiro de Aquino Pereira Neto
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Marcos Fábio Gadelha Rocha
- Posgraduate Program in Medical Microbiology; Department of Pathology and Legal Medicine, Federal University of Ceará, Fortaleza, Ceará, Brazil.,Posgraduate Program in Veterinary Sciences, School of Veterinary Medicine, State University of Ceará, Fortaleza, Ceará, Brazil
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Brilhante RSN, Maia-Júnior JE, Oliveira JS, Guedes GMM, Silva AL, Moura FBP, Sales JA, Castelo-Branco DSCM, Sidrim JJC, Cordeiro RA, Pereira-Neto WA, Rocha MFG. Yeasts from the microbiota of bats: a focus on the identification and antimicrobial susceptibility of cryptic species of Candida. J Med Microbiol 2016; 65:1225-1228. [DOI: 10.1099/jmm.0.000340] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Raimunda S. N. Brilhante
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
| | - José E. Maia-Júnior
- School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza-CE, Brazil
| | - Jonathas S. Oliveira
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
| | - Glaucia M. M. Guedes
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
| | - Aline L. Silva
- School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza-CE, Brazil
| | - Francisco B. P. Moura
- School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza-CE, Brazil
| | - Jamille A. Sales
- School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza-CE, Brazil
| | - Debora S. C. M. Castelo-Branco
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
| | - José J. C. Sidrim
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
| | - Rossana A. Cordeiro
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
| | | | - Marcos F. G. Rocha
- Department of Pathology and Legal Medicine, School of Medicine, Specialized Medical Mycology Center, Postgraduate Program in Medical Microbiology, Federal University of Ceará, Fortaleza-CE, Brazil
- School of Veterinary Medicine, Postgraduate Program in Veterinary Sciences, State University of Ceará, Fortaleza-CE, Brazil
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Corte L, di Cagno R, Groenewald M, Roscini L, Colabella C, Gobbetti M, Cardinali G. Phenotypic and molecular diversity of Meyerozyma guilliermondii strains isolated from food and other environmental niches, hints for an incipient speciation. Food Microbiol 2015; 48:206-15. [PMID: 25791010 DOI: 10.1016/j.fm.2014.12.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 11/17/2014] [Accepted: 12/16/2014] [Indexed: 10/24/2022]
Abstract
Meyerozyma guilliermondii is a yeast species widely isolated from several natural environments and from fruit; in medical microbiology it is known as the teleomorph of the opportunistic pathogen Candida guilliermondii, which causes about 2% of the human blood infections. This yeast is also promising in a variety of biotechnological applications as vitamins production and post-harvest control. The question if isolates from different sources are physiologically and genetically similar, or if the various environments induced significant differences, is crucial for the understanding of this species structure and to select strains appropriate for each application. This question was addressed using LSU and ITS sequencing for taxonomic assignment, i-SSR (GACA4) for the molecular characterization and FTIR for the metabolomic fingerprint. All data showed that fruit and environmental isolates cluster separately with a general good agreement between metabolomics and molecular analysis. An additional RAPD analysis was able to discriminate strains according to the isolation position within the pineapple fruit. Although all strains are members of the M. guilliermondii species according to the current standards, the distribution of large variability detected suggests that some specialization occurred in the niches inhabited by this yeast and that food related strains can be differentiated from the medical isolates.
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Affiliation(s)
- Laura Corte
- Department of Pharmaceutical Sciences - Microbiology, University of Perugia, Borgo 20 Giugno 74, 06121 Perugia, Italy
| | - Raffaella di Cagno
- Department of Plant Protection and Applied Microbiology, University of Bari, via Amendola 165/a, 70126 Bari, Italy
| | | | - Luca Roscini
- Department of Pharmaceutical Sciences - Microbiology, University of Perugia, Borgo 20 Giugno 74, 06121 Perugia, Italy
| | - Claudia Colabella
- Department of Pharmaceutical Sciences - Microbiology, University of Perugia, Borgo 20 Giugno 74, 06121 Perugia, Italy
| | - Marco Gobbetti
- Department of Plant Protection and Applied Microbiology, University of Bari, via Amendola 165/a, 70126 Bari, Italy
| | - Gianluigi Cardinali
- Department of Pharmaceutical Sciences - Microbiology, University of Perugia, Borgo 20 Giugno 74, 06121 Perugia, Italy; CEMIN, Centre of Excellence on Nanostructured Innovative Materials, Department of Chemistry, Biology and Biotechnology, University of Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy.
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