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Nguyen TTT, Kang KH, Kim DH, Kim SJ, Mun HY, Cheon W, Lee HB. Additions to the Knowledge of the Fungal Order Eurotiales in Korea: Eight Undescribed Species. MYCOBIOLOGY 2023; 51:417-435. [PMID: 38179116 PMCID: PMC10763837 DOI: 10.1080/12298093.2023.2290759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 11/27/2023] [Indexed: 01/06/2024]
Abstract
Eurotiales is a relatively large order of Ascomycetes, well-known for their ability to produce secondary metabolites with potential beneficial applications. To understand their diversity and distribution, different environmental sources including soil, freshwater, insect, and indoor air were investigated. Eight strains of Eurotiales were isolated and identified based on their morphological characters and a multi-gene phylogenetic analysis of the ITS, BenA, CaM, and RPB2 regions. We identified eight taxa that were previously not reported from Korea: Aspergillus baeticus, A. griseoaurantiacus, A. spinulosporus, Penicillium anthracinoglaciei, P. labradorum, P. nalgiovense, Talaromyces atroroseus, and T. georgiensis. Detailed descriptions, illustrations, and phylogenetic tree for the eight new records species are presented, and information regarding the records is also discussed.
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Affiliation(s)
- Thuong T. T. Nguyen
- Department of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Environmental Microbiology Lab, Chonnam National University, Gwangju, South Korea
| | - Ki Hyun Kang
- Department of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Environmental Microbiology Lab, Chonnam National University, Gwangju, South Korea
| | - Dong Hee Kim
- Department of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Environmental Microbiology Lab, Chonnam National University, Gwangju, South Korea
| | - Su Jin Kim
- Department of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Environmental Microbiology Lab, Chonnam National University, Gwangju, South Korea
| | - Hye Yeon Mun
- Microbial Research Department, Fungal Research Team, Nakdonggang National Institute of Biological Resources, Sangju, South Korea
| | - Wonsu Cheon
- Microbial Research Department, Fungal Research Team, Nakdonggang National Institute of Biological Resources, Sangju, South Korea
| | - Hyang Burm Lee
- Department of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Environmental Microbiology Lab, Chonnam National University, Gwangju, South Korea
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Stewart AG, Isler B, Simos P, Farquhar D, George N, Golmayo M, Heney C. Aspergillus Species Causing Invasive Fungal Disease in Queensland, Australia. Mycopathologia 2023:10.1007/s11046-023-00713-5. [PMID: 37067664 DOI: 10.1007/s11046-023-00713-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 02/05/2023] [Indexed: 04/18/2023]
Abstract
BACKGROUND Aspergillus species are important causes of invasive fungal disease, particularly among those with an impaired immune system. Increasing reports have revealed a rising incidence of antifungal drug resistance among Aspergillus spp., particularly among cryptic species. Understanding local antifungal susceptibility patterns is paramount to delivering optimal clinical care. METHODS Aspergillus spp. recovered from clinical specimens between 2000 and 2021 from Pathology Queensland were collected. Aspergillus spp. were identified routinely morphologically, and where there was ambiguity or a lack of sporulation, by sequencing of the internal transcribed spacer (ITS) region. All Aspergillus spp. that underwent antifungal susceptibility testing according to the CLSI M38-A3 method and were recorded and included in the study. Amphotericin B, voriconazole, posaconazole, isavuconazole, micafungin, caspofungin, and anidulafungin were tested. Pathology Queensland services all public healthcare facilities in Queensland, Australia. RESULTS 236 Aspergillus spp. were identified from clinical specimens during the study period. The most frequent species identified were Aspergillus section Fumigati (n = 119), Aspergillus section Flavi (n = 35), Aspergillus terreus (n = 32) and Aspergillus niger (n = 29). Overall, MIC50/90 values for voriconazole, posaconazole, itraconazole, and isavuconazole were 0.25/1, 0.25/0.5, 0.25/0.5, and 0.5/2 mg/L respectively. Echinocandins demonstrated low MIC values overall with micafungin and anidulafungin both having an MIC50/90 of 0.015/0.03 mg/L. A total of 15 cryptic species were identified; high triazole MIC values were observed with a voriconazole MIC50/90 of 2/8 mg/L. From 2017 to 2021 we observed an increase in incidence of isolates with high voriconazole MIC values. There was no difference in voriconazole MIC values between Aspergillus spp. acquired in North Queensland when compared to Southeast Queensland, Australia. CONCLUSION Increasing reports of antifungal resistance among Aspergillus spp. is concerning and warrants further investigation both locally and worldwide. Active surveillance of both the emergence of different Aspergillus spp. and changes in antifungal susceptibility patterns over time is crucial to informing clinicians and treatment guidelines.
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Affiliation(s)
- Adam G Stewart
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women's Hospital Campus, Brisbane, Australia.
- Department of Infectious Diseases, Royal Brisbane and Women's Hospital, Brisbane, Australia.
- Central Microbiology, Pathology Queensland, Brisbane, Australia.
| | - Burcu Isler
- Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Royal Brisbane and Women's Hospital Campus, Brisbane, Australia
- Infection Management Services, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Peter Simos
- Infection Management Services, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Drew Farquhar
- Department of Infectious Diseases, Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - Narelle George
- Central Microbiology, Pathology Queensland, Brisbane, Australia
| | - Mila Golmayo
- Central Microbiology, Pathology Queensland, Brisbane, Australia
| | - Claire Heney
- Central Microbiology, Pathology Queensland, Brisbane, Australia
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Nargesi S, Jafarzadeh J, Najafzadeh MJ, Nouripour-Sisakht S, Haghani I, Abastabar M, Ilkit M, Hedayati MT. Molecular identification and antifungal susceptibility of clinically relevant and cryptic species of Aspergillus sections Flavi and Nigri. J Med Microbiol 2022; 71. [PMID: 35451946 DOI: 10.1099/jmm.0.001480] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Introduction. Aspergillus sections Flavi and Nigri comprise clinically relevant and cryptic species that differ significantly in drug susceptibility, meaning that effective treatment depends on correct species identification.Hypothesis/Gap Statement. There are no comprehensive data for molecular identification and antifungal susceptibility testing (AFST) of clinically relevant and cryptic species of Aspergillus sections Flavi and Nigri as the main agents of invasive and non-invasive aspergillosis in Iran. We aimed to perform molecular identification and AFST of 213 clinical Aspergillus isolates belonging to sections Flavi and Nigri. Molecular identification of isolates was performed using sequencing of the β-tubulin gene and in vitro AFST was conducted according to the Clinical and Laboratory Standards Institute (CLSI) M38-A3 guidelines.Results. The most common isolates in sections Flavi and Nigri were Aspergillus flavus (110/113, 97.3 %) and Aspergillus tubingensis (49/100, 49.0 %), respectively. A total of 62/213 (29.1 %) isolates belonging to cryptic species were identified; among them, A. tubingensis was the most prevalent (49/62, 79.0%). Aspergillus flavus and A. niger isolates that responded to the minimum inhibitory concentrations (MICs) of itraconazole above the epidemiological cutoff values were the most frequently detected: 8/110 (7.3 %) and 3/41 (7.3 %), respectively. In section Flavi, Aspergillus alliaceus responded to amphotericin B at a high MIC (>16 µg mL-1) and in section Nigri, one of the three Aspergillus luchuensis/awamori isolates responded to itraconazole at an MIC >16 µg ml-1. Interestingly, for all Aspergillus welwitschiae isolates, the MIC50 and MIC90 of itraconazole were both 16 µg ml-1.Conclusion. A considerable presence of A. flavus and A. niger isolates showing non-wild-type responses to azoles in clinical cases of aspergillosis indicates the importance of classifying clinical Aspergillus isolates at the species level and performing antifungal susceptibility testing on the isolates, which would ensure appropriate treatment.
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Affiliation(s)
- Sanaz Nargesi
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | - Jalal Jafarzadeh
- Department of Medical Parasitology and Mycology, School of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Mohammad Javad Najafzadeh
- Department of Parasitology and Mycology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad 9199-91766, Iran
| | | | - Iman Haghani
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mahdi Abastabar
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | - Macit Ilkit
- Division of Mycology, Department of Microbiology, Faculty of Medicine, University of Çukurova, Adana, Turkey
| | - Mohammad Taghi Hedayati
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
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New Species of Aspergillus (Aspergillaceae) from Tropical Islands of China. J Fungi (Basel) 2022; 8:jof8030225. [PMID: 35330227 PMCID: PMC8954917 DOI: 10.3390/jof8030225] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 02/21/2022] [Accepted: 02/22/2022] [Indexed: 12/31/2022] Open
Abstract
Aspergillus species are cosmopolitan and ubiquitous, closely related to human daily life. They are also of food, industrial and medical importance. From the examination of cultures isolated from soil samples collected on tropical islands of China, four new species of the genus were discovered based on phylogenetic analyses and morphological comparisons. Aspergillus xishaensis sp. nov. and A. neoterreus sp. nov. belong to sections Flavipedes and Terrei of subgenus Circumdati, and A. hainanicus sp. nov. and A. qilianyuensis sp. nov. are in sections Cavernicolarum and Nidulantes of subgenus Nidulantes. To accommodate A. hainanicus, a new series Hainanici was proposed. Detailed descriptions and illustrations of the new taxa were provided.
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Shao J, Wang Q, Wei L, Wan Z, Li R, Yu J. Limitations of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for the identification of Aspergillus species. Med Mycol 2022; 60:6511566. [PMID: 35044460 DOI: 10.1093/mmy/myab084] [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: 09/10/2021] [Revised: 11/17/2021] [Indexed: 11/12/2022] Open
Abstract
This study aimed to detect the identification limitations for Aspergillus species from patients or the environment based on MALDI-TOF MS analysis. A total of 209 Aspergillus isolates were selected in this study. One hundred and sixty-eight of the strains were selected as challenge strains for MALDI-TOF MS analysis, while the remaining 41 strains were used to construct a supplementary database. The 168 challenge strains were identified by the Bruker Filamentous Fungi Library v1.0 (the Bruker Library) and identified again using the Bruker Library combined with the supplementary database (the combined database). The sensitivity of MALDI-TOF MS with the Bruker Library alone and with the combined database in identifying the challenge strains at the species level was 64.3% and 85.7%, respectively. With the combined database, the sensitivity of MALDI-TOF MS in identifying strains in Aspergillus sections Fumigati, Flavi, Nigri, Terrei, and Nidulantes was 100%, 86.5%, 76.1%, 100%, and 80%, respectively, and the sensitivity in identifying strains of other Aspergillus species was 71.4%. The specificity of MALDI-TOF MS in identifying strains in all Aspergillus sections at the species level was 100%. Even when using the combined database, MALDI-TOF MS analysis showed some misidentification for the species A. niger, A. welwitschiae, A. luchuensis, A. flavus and A. sydowii. In conclusion, with the combined database, MALDI-TOF MS showed good performance in identifying the species in Aspergillus sections Fumigati and Terrei but limited performance in distinguishing some closely related species in sections Nigri, Flavi and Nidulantes.
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Affiliation(s)
- Jin Shao
- Department of Dermatology and Venereology, Peking University First Hospital; Research Center for Medical Mycology, Peking University; Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Qiqi Wang
- Department of Dermatology and Venereology, Peking University First Hospital; Research Center for Medical Mycology, Peking University; Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Linwei Wei
- Department of Dermatology and Venereology, Peking University First Hospital; Research Center for Medical Mycology, Peking University; Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Zhe Wan
- Department of Dermatology and Venereology, Peking University First Hospital; Research Center for Medical Mycology, Peking University; Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Ruoyu Li
- Department of Dermatology and Venereology, Peking University First Hospital; Research Center for Medical Mycology, Peking University; Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
| | - Jin Yu
- Department of Dermatology and Venereology, Peking University First Hospital; Research Center for Medical Mycology, Peking University; Beijing Key Laboratory of Molecular Diagnosis of Dermatoses, Peking University First Hospital; National Clinical Research Center for Skin and Immune Diseases, Beijing 100034, China
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Sklenář F, Jurjević Ž, Houbraken J, Kolařík M, Arendrup M, Jørgensen K, Siqueira J, Gené J, Yaguchi T, Ezekiel C, Silva Pereira C, Hubka V. Re-examination of species limits in Aspergillus section Flavipedes using advanced species delimitation methods and description of four new species. Stud Mycol 2021; 99:100120. [PMID: 35003383 PMCID: PMC8688885 DOI: 10.1016/j.simyco.2021.100120] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Since the last revision in 2015, the taxonomy of section Flavipedes evolved rapidly along with the availability of new species delimitation techniques. This study aims to re-evaluate the species boundaries of section Flavipedes members using modern delimitation methods applied to an extended set of strains (n = 90) collected from various environments. The analysis used DNA sequences of three house-keeping genes (benA, CaM, RPB2) and consisted of two steps: application of several single-locus (GMYC, bGMYC, PTP, bPTP) and multi-locus (STACEY) species delimitation methods to sort the isolates into putative species, which were subsequently validated using DELINEATE software that was applied for the first time in fungal taxonomy. As a result, four new species are introduced, i.e. A. alboluteus, A. alboviridis, A. inusitatus and A. lanuginosus, and A. capensis is synonymized with A. iizukae. Phenotypic analyses were performed for the new species and their relatives, and the results showed that the growth parameters at different temperatures and colonies characteristics were useful for differentiation of these taxa. The revised section harbors 18 species, most of them are known from soil. However, the most common species from the section are ecologically diverse, occurring in the indoor environment (six species), clinical samples (five species), food and feed (four species), droppings (four species) and other less common substrates/environments. Due to the occurrence of section Flavipedes species in the clinical material/hospital environment, we also evaluated the susceptibility of 67 strains to six antifungals (amphotericin B, itraconazole, posaconazole, voriconazole, isavuconazole, terbinafine) using the reference EUCAST method. These results showed some potentially clinically relevant differences in susceptibility between species. For example, MICs higher than those observed for A. fumigatus wild-type were found for both triazoles and amphotericin B for A. ardalensis, A. iizukae, and A. spelaeus whereas A. lanuginosus, A. luppiae, A. movilensis, A. neoflavipes, A. olivimuriae and A. suttoniae were comparable to or more susceptible as A. fumigatus. Finally, terbinafine was in vitro active against all species except A. alboviridis.
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Affiliation(s)
- F. Sklenář
- Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology, Czech Academy of Sciences, Prague, Czech Republic
| | | | - J. Houbraken
- Westerdijk Fungal Biodiversity Institute, Utrecht, the Netherlands
| | - M. Kolařík
- Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology, Czech Academy of Sciences, Prague, Czech Republic
| | - M.C. Arendrup
- Unit of Mycology, Statens Serum Institut, Copenhagen, Denmark
- Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - K.M. Jørgensen
- Unit of Mycology, Statens Serum Institut, Copenhagen, Denmark
| | - J.P.Z. Siqueira
- Laboratório de Microbiologia, Faculdade de Medicina de São José do Rio Preto, São José do Rio Preto, Brazil
- Unitat de Micologia, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - J. Gené
- Unitat de Micologia, Facultat de Medicina i Ciències de la Salut, IISPV, Universitat Rovira i Virgili, Reus, Spain
| | - T. Yaguchi
- Medical Mycology Research Center, Chiba University, Chuo-ku, Chiba, Japan
| | - C.N. Ezekiel
- Department of Microbiology, Babcock University, Ilishan Remo, Ogun State, Nigeria
| | - C. Silva Pereira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Oeiras, Portugal
| | - V. Hubka
- Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology, Czech Academy of Sciences, Prague, Czech Republic
- Medical Mycology Research Center, Chiba University, Chuo-ku, Chiba, Japan
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Treviño-Rangel RDJ, Villanueva-Lozano H, Bonifaz A, Castañón-Olivares LR, Andrade A, Becerril-García MA, Martínez-Reséndez MF, Ayala-Gaytán J, Montoya AM, González GM. Species distribution and antifungal susceptibility patterns of Aspergillus isolates from clinical specimens and soil samples in Mexico. Med Mycol 2021; 59:1006-1014. [PMID: 34021564 DOI: 10.1093/mmy/myab031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 05/05/2021] [Accepted: 05/19/2021] [Indexed: 01/13/2023] Open
Abstract
This study aimed to assess the species distribution and antifungal susceptibility patterns of 200 strains of Aspergillus isolated from clinical specimens (n = 146) and soil samples (n = 54) in Mexico. ITS, β-tubulin, and calmodulin DNA sequencing was performed for species identification. Broth microdilution susceptibility testing for amphotericin B, voriconazole, posaconazole, itraconazole, isavuconazole, anidulafungin, caspofungin, and micafungin was done according to CLSI for all strains. A. fumigatus was most frequently recovered from clinical specimens, while A. niger was commonly encountered in soil, both followed by A. flavus in second place. A total of 60 (30%) cryptic species were identified, with A. tubingensis and A. tamarii being the most commonly found. The decreased susceptibility to amphotericin B and azoles was 32% for both, and were mainly led by A. fumigatus, whereas this percentage decreased to 9% for caspofungin particularly in A. terreus. More than 75% of cryptic species were susceptible in vitro to all antifungals. Multi-azole decreased susceptibility was detected only in 7 isolates. Given that antifungal resistance in Aspergillus spp. is an increasing worldwide threat that causes major challenges in the clinical management of aspergillosis, these data highlight the need for continuous epidemiological surveillance of these pathogens for the implementation of locally-adequate treatment strategies.
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Affiliation(s)
- Rogelio de J Treviño-Rangel
- Departamento de Microbiología, Facultad de Medicina and Hospital Universitario "Dr. José Eleuterio González", Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Hiram Villanueva-Lozano
- Departamento de Microbiología, Facultad de Medicina and Hospital Universitario "Dr. José Eleuterio González", Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Alexandro Bonifaz
- Servicio de Dermatología and Departamento de Micología, Hospital General de México "Dr. Eduardo Liceaga", Mexico City, Mexico
| | - Laura R Castañón-Olivares
- Unidad de Micología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Angel Andrade
- Departamento de Microbiología, Facultad de Medicina and Hospital Universitario "Dr. José Eleuterio González", Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Miguel A Becerril-García
- Departamento de Microbiología, Facultad de Medicina and Hospital Universitario "Dr. José Eleuterio González", Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | | | - Jacobo Ayala-Gaytán
- Unidad de Vigilancia Epidemiológica, Hospital San José-Tec Salud, Monterrey, Mexico
| | - Alexandra M Montoya
- Departamento de Microbiología, Facultad de Medicina and Hospital Universitario "Dr. José Eleuterio González", Universidad Autónoma de Nuevo León, Monterrey, Mexico
| | - Gloria M González
- Departamento de Microbiología, Facultad de Medicina and Hospital Universitario "Dr. José Eleuterio González", Universidad Autónoma de Nuevo León, Monterrey, Mexico
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Guo Y, Ding L, Ghidinelli S, Gotfredsen CH, de la Cruz M, Mackenzie TA, Ramos MC, Sánchez P, Vicente F, Genilloud O, Coriani S, Larsen RW, Frisvad JC, Larsen TO. Taxonomy Driven Discovery of Polyketides from Aspergillus californicus. JOURNAL OF NATURAL PRODUCTS 2021; 84:979-985. [PMID: 33656895 DOI: 10.1021/acs.jnatprod.0c00866] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Five new polyketides were isolated from the rare filamentous fungus Aspergillus californicus IBT 16748 including calidiol A (1); three phthalide derivatives califuranones A1, A2, and B (2-4); and a pair of enantiomers (-)-calitetralintriol A (-5) and (+)-calitetralintriol A (+5) together with four known metabolites (6-9). The structures of the new products were established by extensive spectroscopic analyses including HRMS and 1D and 2D NMR. The absolute configurations of two diastereomers 2 and 3 and the enantiomers (-5) and (+5) were assigned by comparing their experimental and calculated ECD data, whereas the absolute configuration of 4 was proposed by analogy. Compound 1 showed moderate activity against methicillin-resistant Staphylococcus aureus.
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Affiliation(s)
- Yaojie Guo
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark
| | - Ling Ding
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark
| | - Simone Ghidinelli
- Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, I-25123 Brescia, Italy
| | - Charlotte H Gotfredsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Mercedes de la Cruz
- Fundación MEDINA, Parque Tecnológico de Ciencias de la Salud, Avda. del Conocimiento 34, 18016 Armilla, Granada, Spain
| | - Thomas A Mackenzie
- Fundación MEDINA, Parque Tecnológico de Ciencias de la Salud, Avda. del Conocimiento 34, 18016 Armilla, Granada, Spain
| | - Maria C Ramos
- Fundación MEDINA, Parque Tecnológico de Ciencias de la Salud, Avda. del Conocimiento 34, 18016 Armilla, Granada, Spain
| | - Pilar Sánchez
- Fundación MEDINA, Parque Tecnológico de Ciencias de la Salud, Avda. del Conocimiento 34, 18016 Armilla, Granada, Spain
| | - Francisca Vicente
- Fundación MEDINA, Parque Tecnológico de Ciencias de la Salud, Avda. del Conocimiento 34, 18016 Armilla, Granada, Spain
| | - Olga Genilloud
- Fundación MEDINA, Parque Tecnológico de Ciencias de la Salud, Avda. del Conocimiento 34, 18016 Armilla, Granada, Spain
| | - Sonia Coriani
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - René W Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, DK-2800 Kgs. Lyngby, Denmark
| | - Jens C Frisvad
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark
| | - Thomas O Larsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark
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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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Lackner M, Obermair J, Naschberger V, Raschbichler LM, Kandelbauer C, Pallua J, Metzlaff J, Furxer S, Lass-Flörl C, Binder U. Cryptic species of Aspergillus section Terrei display essential physiological features to cause infection and are similar in their virulence potential in Galleria mellonella. Virulence 2020; 10:542-554. [PMID: 31169442 PMCID: PMC6592363 DOI: 10.1080/21505594.2019.1614382] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Aspergillus species account for the majority of invasive mold infections in immunocompromised patients. Most commonly, members of the Aspergillus section Fumigati are isolated from clinical material, followed by isolates belonging to section Terrei. The section Terrei contains 16 accepted species. Six species were found to be of clinical relevance and studied for differences in growth adaptability and virulence potential. Therefore, a set of 73 isolates (22 A. terreus s.s., 8 A. alabamensis, 27 A. citrinoterreus, 2 A. floccosus, 13 A. hortai, and 1 A. neoafricanus) was studied to determine differences in (a) germination kinetics, (b) temperature tolerance, (c) oxygen stress tolerance (1% O2), and (d) a combination of the latter two. Virulence potential of phialidic (PC) and accessory conidia (AC) was studied in G. mellonella larvae, using survival as read out. Further, the formation of AC was evaluated in larval tissue. All isolates were able to grow at elevated temperature and hypoxia, with highest growth and germination rates at 37°C. A. terreus s.s., A. citrinoterreus, and A. hortai exhibited highest growth rates. Virulence potential in larvae was inoculum and temperature dependent. All species except A. floccosus formed AC and germination kinetics of AC was variable. Significantly higher virulence potential of AC was found for one A. hortai isolate. AC could be detected in larval tissue 96 h post infection. Based on these findings, cryptic species of section Terrei are well adapted to the host environment and have similar potential to cause infections.
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Affiliation(s)
- Michaela Lackner
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | - Judith Obermair
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | - Verena Naschberger
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | | | - Carmen Kandelbauer
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | - Johannes Pallua
- b Department of Pathology , Medical University Innsbruck , Austria
| | - Julia Metzlaff
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | - Sibylle Furxer
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | - Cornelia Lass-Flörl
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
| | - Ulrike Binder
- a Division of Hygiene and Medical Microbiology , Medical University Innsbruck , Austria
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11
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Crognale S, Pesciaroli L, Felli M, Petruccioli M, D'Annibale A, Bresciani A, Peterson SW. Aspergillus olivimuriae sp. nov., a halotolerant species isolated from olive brine. Int J Syst Evol Microbiol 2019; 69:2899-2906. [PMID: 31274407 DOI: 10.1099/ijsem.0.003575] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A facultative halo-tolerant Aspergillus strain was isolated from olive brine waste, the effluent from the debittering process of table olives. Phenotypic and molecular characteristics showed clearly that the isolate represents a novel species. Based on the source of isolation, the new species has been named Aspergillus olivimuriae. It was found tolerant to high concentrations of NaCl (15 %) or sucrose (60 %) and it exhibits substantial growth under these conditions. Although the new species grew profusely at 37 °C, no growth was observed at 40 °C, conidia en masse were avellaneous on all media. The description of the new species Aspergillus olivimuriae brings the total species of Aspergillus sect. Flavipedes to 15. The type strain of A. olivimuriae sp. nov. is NRRL 66783 (CCF 6208), its whole genome has been deposited as PRJNA498048.
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Affiliation(s)
- Silvia Crognale
- Department for Innovation of Biological, Agro-food and Forestry Systems, General and Applied Microbiology Lab, University of Tuscia, Viterbo 01100, Italy
| | - Lorena Pesciaroli
- Department for Innovation of Biological, Agro-food and Forestry Systems, General and Applied Microbiology Lab, University of Tuscia, Viterbo 01100, Italy
| | - Martina Felli
- Department for Innovation of Biological, Agro-food and Forestry Systems, General and Applied Microbiology Lab, University of Tuscia, Viterbo 01100, Italy
| | - Maurizio Petruccioli
- Department for Innovation of Biological, Agro-food and Forestry Systems, General and Applied Microbiology Lab, University of Tuscia, Viterbo 01100, Italy
| | - Alessandro D'Annibale
- Department for Innovation of Biological, Agro-food and Forestry Systems, General and Applied Microbiology Lab, University of Tuscia, Viterbo 01100, Italy
| | | | - Stephen W Peterson
- Mycotoxin Prevention and Applied Microbiology Research Unit, Agricultural Research Service, US Department of Agriculture, Peoria 61604, USA
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12
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Welker M, Van Belkum A, Girard V, Charrier JP, Pincus D. An update on the routine application of MALDI-TOF MS in clinical microbiology. Expert Rev Proteomics 2019; 16:695-710. [PMID: 31315000 DOI: 10.1080/14789450.2019.1645603] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Introduction: Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) has entered clinical diagnostics and is today a generally accepted and integral part of the workflow for microbial identification. MALDI-TOF MS identification systems received approval from national and international institutions, such as the USA-FDA, and are continuously improved and adopted to other fields like veterinary and industrial microbiology. The question is whether MALDI-TOF MS also has the potential to replace other conventional and molecular techniques operated in routine diagnostic laboratories. Areas covered: We give an overview of new advancements of mass spectral analysis in the context of microbial diagnostics. In particular, the expansion of databases to increase the range of readily identifiable bacteria and fungi, the refined discrimination of species complexes, subspecies, and types, the testing for antibiotic resistance or susceptibility, progress in sample preparation including automation, and applications of other mass spectrometry techniques are discussed. Expert opinion: Although many new approaches of MALDI-TOF MS are still in the stage of proof of principle, it is expectable that MALDI-TOF MS will expand its role in the clinical microbiology laboratory of the future. New databases, instruments and analytical software modules will continue to be developed to further improve diagnostic efficacy.
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Affiliation(s)
- Martin Welker
- bioMérieux, Microbiology R&D , La Balme Les Grottes , France
| | - Alex Van Belkum
- bioMérieux, Microbiology R&D , La Balme Les Grottes , France
| | - Victoria Girard
- bioMérieux, Microbiology R&D , La Balme Les Grottes , France
| | | | - David Pincus
- bioMérieux, Microbiology Innovation , Hazelwood , MO , USA
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13
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Trabelsi H, Neji S, Hadrich I, Khemakhem N, Sellami H, Makni F, Ayadi A. Contribution of the internal transcribed spacer regions to the detection and identification of human fungal pathogens. Curr Res Transl Med 2019; 67:100-106. [PMID: 30975553 DOI: 10.1016/j.retram.2019.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/25/2019] [Accepted: 04/02/2019] [Indexed: 11/17/2022]
Abstract
Fungi are morphologically and phylogenetically diverse. There identification is largely based on phenotypic methods. Thus, related species, phenotypic variants and rare species may be unidentified. So, molecular methods have been introduced for identification of pathogenic molds to overcome these problems. In this study, we report the contribution of molecular tools (PCR sequencing) to identify fungal pathogens in both clinical and environmental samples. A total of 82 mold isolates were used (50 clinical samples and 32 environmental samples). PCR and direct sequencing, targeting the internal transcribed spacer (ITS) regions, were performed. We employed comparative sequence analysis to identify molds by using the GenBank database. 89% of isolates were identified by phenotypic methods. PCR- sequencing allowed the fungal identification in all cases. The concordance between molecular and morphological identification was obtained for 33 cases (40.2%). In 36 cases (43.9%), the molecular study gave the exact species identification. PCR sequencing allowed as revising mycological identification for 13 fungi strains (15.9%). The concordance of identification at species level by phenotypic method and by sequence analysis was obtained for 28% of clinical samples and for 59% of environmental samples. The phylogenetic tree for the ITS sequences showed six different clusters that are composed of isolates belonging to the same genus or species. PCR sequencing has been shown to be useful for the detection of the presence of fungal DNA in both environmental and clinical samples. It is rapid and more sensitive for the identification of medically important fungi.
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Affiliation(s)
- H Trabelsi
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - S Neji
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - I Hadrich
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - N Khemakhem
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - H Sellami
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - F Makni
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - A Ayadi
- Laboratory of Parasitology-Mycology, Habib Bourguiba Hospital, Sfax, Tunisia.
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14
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Imbert S, Normand AC, Gabriel F, Cassaing S, Bonnal C, Costa D, Lachaud L, Hasseine L, Kristensen L, Schuttler C, Raberin H, Brun S, Hendrickx M, Stubbe D, Piarroux R, Fekkar A. Multi-centric evaluation of the online MSI platform for the identification of cryptic and rare species of Aspergillus by MALDI-TOF. Med Mycol 2019; 57:962-968. [DOI: 10.1093/mmy/myz004] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/04/2019] [Accepted: 01/08/2019] [Indexed: 11/12/2022] Open
Abstract
Abstract
The taxonomy of Aspergillus species has recently been revolutionized with the introduction of cryptic species and section concepts. However, their species-level identification in routine laboratories remains a challenge. The aim of this study was to prospectively assess the identification accuracy of cryptic species of Aspergillus in various laboratories using the mass spectrometry identification (MSI) platform, an independent and freely accessible online mass spectrometry database. Over a 12-month period, when a select set of MSI users identified cryptic species, they were contacted and requested to send the isolates to our laboratory for sequence-based identification. Sequence and MSI identification results were then compared. During the study period, 5108 Aspergillus isolates were identified using MSI including 1477 (28.9%) cryptic species. A total of 245 isolates that corresponded to 56 cryptic species and 13 sections were randomly selected for DNA sequencing confirmation. Agreement between the two methods was 99.6% at the section level and 66.1% at the species level. However, almost all discrepancies (72/83, 86.7%) were misidentifications between closely related cryptic species belonging to the same section. Fifty-one isolates from noncryptic species were also identified, thus yielding 100% and 92.2% agreement at the section and species level, respectively. Although the MSI fungus database is a reliable tool to identify Aspergillus at the section level, the database still requires adjustment to correctly identify rare or cryptic species at the species level. Nevertheless, the application properly differentiated between cryptic and sensu stricto species in the same section, thus alerting on possible specific isolate characteristics.
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Affiliation(s)
- Sébastien Imbert
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Parasitologie Mycologie, F-75013 Paris, France
- Centre d’Immunologie et des Maladies Infectieuses, CIMI-Paris, F-75013 Paris, France
- Sorbonne Université, AP-HP, Hôpital Pitié-Salpêtrière, F-75013 Paris, France
| | - Anne Cécile Normand
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Parasitologie Mycologie, F-75013 Paris, France
| | - Frédéric Gabriel
- Centre Hospitalier Universitaire de Bordeaux, Service de Parasitologie Mycologie, F-33000, Bordeaux, France
| | - Sophie Cassaing
- Centre Hospitalier Universitaire de Toulouse, Service de Parasitologie Mycologie, F-31059, Toulouse, France
| | - Christine Bonnal
- AP-HP, Hôpital Bichat-Claude Bernard, Service de Parasitologie Mycologie, F-75018 Paris, France
| | - Damien Costa
- Centre Hospitalier Universitaire de Rouen, Service de Parasitologie Mycologie, F-76000, Rouen, France
| | - Laurence Lachaud
- Centre Hospitalier Universitaire de Montpellier, Service de Parasitologie Mycologie, F-34000, Montpellier, France
| | - Lilia Hasseine
- Centre Hospitalier Universitaire de Nice, Service de Parasitologie Mycologie, F-06000, Nice, France
| | - Lise Kristensen
- Aarhus University Hospital, Department of Clinical Microbiology, DK-8200, Aarhus N, Denmark
| | | | - Hélène Raberin
- Centre Hospitalier Universitaire de Saint Etienne, Service de Parasitologie Mycologie, F-42100, Saint Etienne, France
| | - Sophie Brun
- AP-HP, Hôpital Avicenne, Service de Parasitologie Mycologie, F-93000 Bobigny, France
| | - Marijke Hendrickx
- Service of Mycology and Aerobiology, BCCM/IHEM Fungal collection, Scientific Institute of Public Health, B-1050, Brussels, Belgium
| | - Dirk Stubbe
- Service of Mycology and Aerobiology, BCCM/IHEM Fungal collection, Scientific Institute of Public Health, B-1050, Brussels, Belgium
| | - Renaud Piarroux
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Parasitologie Mycologie, F-75013 Paris, France
- Sorbonne Université, AP-HP, Hôpital Pitié-Salpêtrière, F-75013 Paris, France
- Institut Pierre Louis d’Epidémiologie et de Santé Publique, INSERM, F-75013 Paris, France
| | - Arnaud Fekkar
- AP-HP, Groupe Hospitalier Pitié-Salpêtrière, Service de Parasitologie Mycologie, F-75013 Paris, France
- Centre d’Immunologie et des Maladies Infectieuses, CIMI-Paris, F-75013 Paris, France
- Sorbonne Université, AP-HP, Hôpital Pitié-Salpêtrière, F-75013 Paris, France
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15
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Wiederhold NP, Gibas CFC. From the Clinical Mycology Laboratory: New Species and Changes in Fungal Taxonomy and Nomenclature. J Fungi (Basel) 2018; 4:E138. [PMID: 30558386 PMCID: PMC6308937 DOI: 10.3390/jof4040138] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/12/2018] [Accepted: 12/13/2018] [Indexed: 12/14/2022] Open
Abstract
Fungal taxonomy is the branch of mycology by which we classify and group fungi based on similarities or differences. Historically, this was done by morphologic characteristics and other phenotypic traits. However, with the advent of the molecular age in mycology, phylogenetic analysis based on DNA sequences has replaced these classic means for grouping related species. This, along with the abandonment of the dual nomenclature system, has led to a marked increase in the number of new species and reclassification of known species. Although these evaluations and changes are necessary to move the field forward, there is concern among medical mycologists that the rapidity by which fungal nomenclature is changing could cause confusion in the clinical literature. Thus, there is a proposal to allow medical mycologists to adopt changes in taxonomy and nomenclature at a slower pace. In this review, changes in the taxonomy and nomenclature of medically relevant fungi will be discussed along with the impact this may have on clinicians and patient care. Specific examples of changes and current controversies will also be given.
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Affiliation(s)
- Nathan P Wiederhold
- Fungus Testing Laboratory, Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.
| | - Connie F C Gibas
- Fungus Testing Laboratory, Department of Pathology and Laboratory Medicine, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.
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