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Davies GE, Thornton CR. A Lateral-Flow Device for the Rapid Detection of Scedosporium Species. Diagnostics (Basel) 2024; 14:847. [PMID: 38667492 PMCID: PMC11048963 DOI: 10.3390/diagnostics14080847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
Scedosporium species are human pathogenic fungi, responsible for chronic, localised, and life-threatening disseminated infections in both immunocompetent and immunocompromised individuals. The diagnosis of Scedosporium infections currently relies on non-specific CT, lengthy and insensitive culture from invasive biopsy, and the time-consuming histopathology of tissue samples. At present, there are no rapid antigen tests that detect Scedosporium-specific biomarkers. Here, we report the development of a rapid (30 min) and sensitive (pmol/L sensitivity) lateral-flow device (LFD) test, incorporating a Scedosporium-specific IgG1 monoclonal antibody (mAb), HG12, which binds to extracellular polysaccharide (EPS) antigens between ~15 kDa and 250 kDa secreted during the hyphal growth of the pathogens. The test is compatible with human serum and allows for the detection of the Scedosporium species most frequently reported as agents of human disease (Scedosporium apiospermum, Scedosporium aurantiacum, and Scedosporium boydii), with limits of detection (LODs) of the EPS biomarkers in human serum of ~0.81 ng/mL (S. apiospermum), ~0.94 ng/mL (S. aurantiacum), and ~1.95 ng/mL (S. boydii). The Scedosporium-specific LFD (ScedLFD) test therefore provides a potential novel opportunity for the detection of infections caused by different Scedosporium species.
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Affiliation(s)
- Genna E. Davies
- ISCA Diagnostics Ltd., B12A, Hatherly Laboratories, Prince of Wales Road, Exeter EX4 4PS, UK;
| | - Christopher R. Thornton
- ISCA Diagnostics Ltd., B12A, Hatherly Laboratories, Prince of Wales Road, Exeter EX4 4PS, UK;
- Biosciences, Faculty of Health and Life Sciences, Prince of Wales Road, Exeter EX4 4PS, UK
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2
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Ravenel K, Guegan H, Gastebois A, Bouchara JP, Gangneux JP, Giraud S. Fungal Colonization of the Airways of Patients with Cystic Fibrosis: the Role of the Environmental Reservoirs. Mycopathologia 2024; 189:19. [PMID: 38407729 DOI: 10.1007/s11046-023-00818-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/23/2023] [Indexed: 02/27/2024]
Abstract
Filamentous fungi frequently colonize the airways of patients with cystic fibrosis and may cause severe diseases, such as the allergic bronchopulmonary aspergillosis. The most common filamentous fungi capable to chronically colonize the respiratory tract of the patients are Aspergillus fumigatus and Scedosporium species. Defining the treatment strategy may be challenging, the number of available drugs being limited and some of the causative agents being multiresistant microorganisms. The knowledge of the fungal niches in the outdoor and indoor environment is needed for understanding the origin of the contamination of the patients. In light of the abundance of some of the causative molds in compost, agricultural and flower fields, occupational activities related to such environments should be discouraged for patients with cystic fibrosis (CF). In addition, the microbiological monitoring of their indoor environment, including analysis of air and dust on surfaces, is essential to propose preventive measures aiming to reduce the exposure to environmental molds. Nevertheless, some specific niches were also identified in the indoor environment, in relation with humidity which favors the growth of thermotolerant molds. Potted plants were reported as indoor reservoirs for Scedosporium species. Likewise, Exophiala dermatitidis may be spread in the kitchen via dishwashers. However, genotype studies are still required to establish the link between dishwashers and colonization of the airways of CF patients by this black yeast. Moreover, as nothing is known regarding the other filamentous fungi associated with CF, further studies should be conducted to identify other potential specific niches in the habitat.
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Affiliation(s)
- Kévin Ravenel
- IRF (Infections Respiratoires Fongiques), SFR ICAT 4208, Univ Angers, Univ Brest, Angers, France
| | - Hélène Guegan
- EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail), UMR_S 1085, CHU Rennes, INSERM, Univ Rennes, 35000, Rennes, France
| | - Amandine Gastebois
- IRF (Infections Respiratoires Fongiques), SFR ICAT 4208, Univ Angers, Univ Brest, Angers, France
| | - Jean-Philippe Bouchara
- IRF (Infections Respiratoires Fongiques), SFR ICAT 4208, Univ Angers, Univ Brest, Angers, France
| | - Jean-Pierre Gangneux
- EHESP, IRSET (Institut de Recherche en Santé Environnement et Travail), UMR_S 1085, CHU Rennes, INSERM, Univ Rennes, 35000, Rennes, France
| | - Sandrine Giraud
- IRF (Infections Respiratoires Fongiques), SFR ICAT 4208, Univ Angers, Univ Brest, Angers, France.
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3
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Scedosporium apiospermum infections in the middle ear and mastoid: case series and review of the literature. The Journal of Laryngology & Otology 2022; 136:979-985. [DOI: 10.1017/s0022215122000202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractObjectivesTo present our case series and management of Scedosporium apiospermum infections of the middle ear and mastoid, and review the current literature on this rare yet potentially life-threatening condition.MethodsMedical records of patients treated at the Royal Victorian Eye and Ear Hospital for S apiospermum middle ear and mastoid infections between 2009 and 2019 were reviewed. A literature search was conducted using PubMed, Medline and Cochrane Library databases.ResultsTwo patients were identified in our institution: a 62-year-old diabetic woman with otogenic skull base osteomyelitis, and a 12-year-old boy with unilateral chronic suppurative otitis media which developed after tympanostomy tube insertion. The persistence of otalgia and otorrhoea despite prolonged antibiotic treatment characterised these cases. Both patients received voriconazole, and achieved disease resolution without complications. Ten relevant cases were identified after review of the literature. Despite treatment, there were three patient deaths, and four patients with otological or neurological complications.ConclusionThe presence of a middle ear or mastoid infection refractory to appropriate topical and systemic antibiotics should prompt clinicians to consider a fungal infection. The role of surgical debridement in the treatment of S apiospermum infection of the middle ear and mastoid is equivocal.
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4
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Natsiopoulos T, Rasotto R, Housley D, Valls Sanchez F. Fungal rhinosinusitis caused by
Scedosporium apiospermum
in a dog in the United Kingdom. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Kitisin T, Ampawong S, Muangkaew W, Sukphopetch P. Phenomic profiling of a novel sibling species within the Scedosporium complex in Thailand. BMC Microbiol 2021; 21:42. [PMID: 33563219 PMCID: PMC7874643 DOI: 10.1186/s12866-021-02105-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/18/2021] [Indexed: 11/16/2022] Open
Abstract
Background Scedosporium species are a group of pathogenic fungi, which can be found worldwide around high human-impacted areas. Infections of Scedosporium have been reported in several immunocompromised and immunocompetent patients with a high mortality rate. Recently, we have isolated and identified several Scedosporium strains during an environmental survey in Thailand. Results We describe the isolate, TMMI-012, possibly a new species isolated from soils in the Chatuchak public park, Bangkok, Thailand. TMMI-012 is phylogenetically related to the Scedosporium genus and is a sibling to S. boydii but shows distinct morphological and pathological characteristics. It is fast growing and highly resistant to antifungal drugs and abiotic stresses. Pathological studies of in vitro and in vivo models confirm its high virulence and pathogenicity. Conclusion TMMI-012 is considered a putative novel Scedosporium species. The high antifungal resistance of TMMI-012 compared with its sibling, Scedosporium species is likely related to its clinical impact on human health.
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Affiliation(s)
- T Kitisin
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - S Ampawong
- Department of Tropical Pathology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - W Muangkaew
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - P Sukphopetch
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
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6
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Liu W, Feng R, Jiang H. Management of pulmonary Scedosporium apiospermum infection by thoracoscopic surgery in an immunocompetent woman. J Int Med Res 2020; 48:300060520931620. [PMID: 32614267 PMCID: PMC7333505 DOI: 10.1177/0300060520931620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The Scedosporium apiospermum complex is a group of emerging opportunistic fungal pathogens that affect both immunocompromised and immunocompetent individuals, most commonly via lung infection. Although they are resistant to many antifungal agents, this group of pathogens has a favorable susceptibility profile to azoles, especially voriconazole. Here, we describe the management of S. apiospermum infection in an otherwise healthy 44-year-old woman. She had exhibited intermittent hemoptysis for 2 years before admission to our hospital. Computed tomography revealed a thin-walled and well-circumscribed cavitary lesion in the left upper lobe; the lesion was filled with consolidative opacities. Fungal culture of bronchoalveolar lavage fluid specimens revealed grayish-white mold; lactophenol cotton blue staining revealed acute angle branched septate hyaline cylindrical hyphae, characteristic of S. apiospermum. Despite voriconazole 200 mg twice daily for 8 weeks, the patient showed no improvement; thus, her left upper lobe was removed via thoracoscopic surgery. Her symptoms immediately improved and chest radiography after surgical resection showed no evidence of radiological progression or reoccurrence. This report demonstrates that S. apiospermum lung infection may not respond well to voriconazole alone in immunocompetent hosts; thus, surgery could be curative for these patients.
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Affiliation(s)
- Wei Liu
- Group of Pulmonary Disease, Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, Chengdu, P. R. China.,Division of Pulmonary Diseases, State Key Laboratory of Biotherapy, West China Hospital, West China School of Medicine, Sichuan University, Chengdu, P. R. China
| | - Ruizhi Feng
- Group of Pulmonary Disease, Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, Chengdu, P. R. China
| | - Hongli Jiang
- Group of Pulmonary Disease, Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, Chengdu, P. R. China
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7
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Mouhajir A, Poirier W, Angebault C, Rahal E, Bouabid R, Bougnoux ME, Kobi A, Zouhair R, Bouchara JP, Giraud S. Scedosporium species in soils from various biomes in Northwestern Morocco. PLoS One 2020; 15:e0228897. [PMID: 32092070 PMCID: PMC7039527 DOI: 10.1371/journal.pone.0228897] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 01/24/2020] [Indexed: 12/26/2022] Open
Abstract
Scedosporium species are opportunistic pathogens causing various infections, including disseminated infections in severely immunocompromised patients. Preventive measures aiming to reduce the risk of exposure to these fungi require a better knowledge on their ecology and on the sources of contamination of the patients. In this context, 99 soil samples from the Rabat-Sale-Kenitra and Fez-Meknes regions in Morocco were analyzed. Samples were inoculated on the highly selective Scedo-Select III culture medium, and seven chemical parameters of the soils were measured. Scedosporium species were detected in 48 of the samples, with the highest density in soils from wastewater treatment plants and landfills, followed by those from roadsides and polluted riverbanks, thus confirming the impact of human activities on their ecology. Scedosporium apiospermum was the most common species, followed by S. boydii and S. aurantiacum. Analysis of the chemical parameters of the soils revealed the presence of Scedosporium species was mainly associated with a moderate electrical conductivity, a pH range of 7.0 to 7.6, a nutrient-rich content and a moderate phosphorus amount. Thereby, these results demonstrated the relatively high occurrence of Scedosporium in Morocco and highlighted the impact of phosphorus content on their ecology.
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Affiliation(s)
- Abdelmounaim Mouhajir
- Groupe d’Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Angers, France
- Department of Biology, Faculty of Sciences, University Moulay Ismail, Meknes, Morocco
| | - Wilfried Poirier
- Groupe d’Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Angers, France
| | - Cécile Angebault
- Université Paris Descartes, Service de Microbiologie, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Elkahkahi Rahal
- Department of Biology, Faculty of Sciences, University Moulay Ismail, Meknes, Morocco
| | - Rachid Bouabid
- Department of Soil Science, Ecole National d’agriculture de Meknes, Meknes, Morocco
| | - Marie-Elisabeth Bougnoux
- Université Paris Descartes, Service de Microbiologie, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Abdessamad Kobi
- Laboratoire en sûreté de fonctionnement qualité et organisation (EA 3858), Université d’Angers, Angers, France
| | - Rachid Zouhair
- Groupe d’Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Angers, France
- Department of Biology, Faculty of Sciences, University Moulay Ismail, Meknes, Morocco
| | - Jean-Philippe Bouchara
- Groupe d’Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Angers, France
- Centre Hospitalier Universitaire, Laboratoire de Parasitologie-Mycologie, Angers, France
| | - Sandrine Giraud
- Groupe d’Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Angers, France
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8
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Staerck C, Tabiasco J, Godon C, Delneste Y, Bouchara JP, Fleury MJJ. Transcriptional profiling of Scedosporium apiospermum enzymatic antioxidant gene battery unravels the involvement of thioredoxin reductases against chemical and phagocytic cells oxidative stress. Med Mycol 2019; 57:363-373. [PMID: 29889264 DOI: 10.1093/mmy/myy033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/22/2018] [Accepted: 05/01/2018] [Indexed: 12/15/2022] Open
Abstract
Scedosporium species rank the second, after Aspergillus fumigatus, among the filamentous fungi colonizing the airways of patients with cystic fibrosis (CF). Development of microorganisms in the respiratory tract depends on their capacity to evade killing by the host immune system, particularly through the oxidative response of macrophages and neutrophils, with the release of reactive oxygen species (ROS) and reactive nitrogen species (RNS). This is particularly true in the airways of CF patients which display an exacerbated inflammatory reaction. To protect themselves, pathogens have developed various enzymatic antioxidant systems implicated in ROS degradation, including superoxide dismutases, catalases, cytochrome C peroxidases, chloroperoxidases and enzymes of the glutathione and thioredoxin systems, or in RNS degradation, that is, flavohemoglobins, nitrate reductases, and nitrite reductases. Here we investigated the transcriptional regulation of the enzymatic antioxidant gene battery in 24-h-old hyphae of Scedosporium apiospermum in response to oxidative stress induced chemically or by exposure to activated phagocytic cells. We showed that 21 out of the 33 genes potentially implicated in the oxidative or nitrosative stress response were overexpressed upon exposure of the fungus to various chemical oxidants, while they were only 13 in co-cultures with macrophages or neutrophils. Among them, genes encoding two thioredoxin reductases and to a lesser extent, a peroxiredoxin and one catalase were found to be overexpressed after chemical oxidative stress as well as in co-cultures. These results suggest that thioredoxin reductases, which are known to be virulence factors in other pathogenic fungi, play a key role in pathogenesis of scedosporiosis, and may be new drug targets.
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Affiliation(s)
- Cindy Staerck
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
| | - Julie Tabiasco
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France
| | - Charlotte Godon
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
| | - Yves Delneste
- CRCINA, INSERM, Université de Nantes, Université d'Angers, Angers, France.,Laboratoire d'Immunologie et Allergologie, Centre Hospitalier Universitaire d'Angers, France
| | - Jean-Philippe Bouchara
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France.,Laboratoire de Parasitologie-Mycologie, Centre Hospitalier Universitaire, Angers, France
| | - Maxime J J Fleury
- Groupe d'Etude des Interactions Hôte-Pathogène (EA 3142), UNIV Angers, UNIV Brest, Université Bretagne-Loire, Angers, France
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9
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Mello TP, Bittencourt VCB, Liporagi-Lopes LC, Aor AC, Branquinha MH, Santos AL. Insights into the social life and obscure side of Scedosporium/Lomentospora species: ubiquitous, emerging and multidrug-resistant opportunistic pathogens. FUNGAL BIOL REV 2019. [DOI: 10.1016/j.fbr.2018.07.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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10
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Smith CG, Woolford L, Talbot JJ, Lee KC, Crocker P. Canine rhinitis caused by an uncommonly-diagnosed fungus, Scedosporium apiospermum. Med Mycol Case Rep 2018; 22:38-41. [PMID: 30140605 PMCID: PMC6104628 DOI: 10.1016/j.mmcr.2018.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 08/07/2018] [Indexed: 11/17/2022] Open
Abstract
A Golden Retriever cross was presented with a four week history of violent sneezing and licking at the nasal planum. Nasal mycosis was diagnosed and Aspergillus sp. presumed the causative agent, until culture, PCR and DNA sequencing showed that Scedosporium apiospermum, an uncommonly diagnosed, yet emerging, fungal pathogen, was the agent responsible. Debridement of the fungal plaques and systemic itraconazole therapy resulted in complete resolution of clinical disease. We discuss the current literature on S. apiospermum, review its clinical significance and question the validity of its ‘complex’ taxonomy.
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Affiliation(s)
- Christopher G Smith
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy 5371, Australia
| | - Lucy Woolford
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy 5371, Australia
| | - Jessica J Talbot
- University Veterinary Teaching Hospital Sydney, The University of Sydney, Camperdown 2050, Australia
| | - Ken C Lee
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy 5371, Australia
| | - Paul Crocker
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy 5371, Australia
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11
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Luplertlop N. Pseudallescheria/Scedosporium complex species: From saprobic to pathogenic fungus. J Mycol Med 2018; 28:249-256. [PMID: 29567285 DOI: 10.1016/j.mycmed.2018.02.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 12/16/2022]
Abstract
Scedosporiosis is an emerging fungal infection caused by Pseudallescheria/Scedosporium complex species (PSC). This pathogen has been drawn significant interest in recent years due to its worldwide prevalence, the seriousness of its infection, associated with high mortality in both immunocompromised and immunocompetent hosts and its cryptic ecology, distribution and epidemiology across the globe. These species complexes can be found in environments impacted by human. The purpose of this review is to describe the characteristics, mode of transmission, ecology, prevalence, global epidemiology of this fungal group in order to increase the awareness of among clinicians and microbiologists, especially in regions with high endemic, as well as to promote further research on all of its aspects.
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Affiliation(s)
- N Luplertlop
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, 10400 Bangkok, Thailand.
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12
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Staerck C, Landreau A, Herbette G, Roullier C, Bertrand S, Siegler B, Larcher G, Bouchara JP, Fleury MJJ. The secreted polyketide boydone A is responsible for the anti-Staphylococcus aureus activity of Scedosporium boydii. FEMS Microbiol Lett 2017; 364:4563577. [DOI: 10.1093/femsle/fnx223] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 10/21/2017] [Indexed: 11/13/2022] Open
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13
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Gene Disruption in Scedosporium aurantiacum: Proof of Concept with the Disruption of SODC Gene Encoding a Cytosolic Cu,Zn-Superoxide Dismutase. Mycopathologia 2017; 183:241-249. [PMID: 29022198 DOI: 10.1007/s11046-017-0204-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 09/25/2017] [Indexed: 12/13/2022]
Abstract
Scedosporium species are opportunistic pathogens responsible for a large variety of infections in humans. An increasing occurrence was observed in patients with underlying conditions such as immunosuppression or cystic fibrosis. Indeed, the genus Scedosporium ranks the second among the filamentous fungi colonizing the respiratory tracts of the CF patients. To date, there is very scarce information on the pathogenic mechanisms, at least in part because of the limited genetic tools available. In the present study, we successfully developed an efficient transformation and targeted gene disruption approach on the species Scedosporium aurantiacum. The disruption cassette was constructed using double-joint PCR procedure, and resistance to hygromycin B as the selection marker. This proof of concept was performed on the functional gene SODC encoding the Cu,Zn-superoxide dismutase. Disruption of the SODC gene improved susceptibility of the fungus to oxidative stress. This technical advance should open new research areas and help to better understand the biology of Scedosporium species.
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14
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Draft Genome Sequence of the Human-Pathogenic Fungus Scedosporium boydii. GENOME ANNOUNCEMENTS 2017; 5:5/37/e00871-17. [PMID: 28912311 PMCID: PMC5597752 DOI: 10.1128/genomea.00871-17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The opportunistic fungal pathogen Scedosporium boydii is the most common Scedosporium species in French patients with cystic fibrosis. Here we present the first genome report for S. boydii, providing a resource which may enable the elucidation of the pathogenic mechanisms in this species.
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15
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Wongsuk T, Pumeesat P, Luplertlop N. Genetic variation analysis and relationships among environmental strains of Scedosporium apiospermum sensu stricto in Bangkok, Thailand. PLoS One 2017; 12:e0181083. [PMID: 28704511 PMCID: PMC5507518 DOI: 10.1371/journal.pone.0181083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 06/26/2017] [Indexed: 11/26/2022] Open
Abstract
The Scedosporium apiospermum species complex is an emerging filamentous fungi that has been isolated from environment. It can cause a wide range of infections in both immunocompetent and immunocompromised individuals. We aimed to study the genetic variation and relationships between 48 strains of S. apiospermum sensu stricto isolated from soil in Bangkok, Thailand. For PCR, sequencing and phylogenetic analysis, we used the following genes: actin; calmodulin exons 3 and 4; the second largest subunit of the RNA polymerase II; ß-tubulin exon 2–4; manganese superoxide dismutase; internal transcribed spacer; transcription elongation factor 1α; and beta-tubulin exons 5 and 6. The present study is the first phylogenetic analysis of relationships among S. apiospermum sensu stricto in Thailand and South-east Asia. This result provides useful information for future epidemiological study and may be correlated to clinical manifestation.
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Affiliation(s)
- Thanwa Wongsuk
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Department of Clinical Pathology, Faculty of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, Thailand
| | - Potjaman Pumeesat
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.,Department of Medical Technology, Faculty of Science and Technology, Bansomdejchaopraya Rajabhat University, Bangkok, Thailand
| | - Natthanej Luplertlop
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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16
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Tóth EJ, Nagy GR, Homa M, Ábrók M, Kiss IÉ, Nagy G, Bata-Csörgő Z, Kemény L, Urbán E, Vágvölgyi C, Papp T. Recurrent Scedosporium apiospermum mycetoma successfully treated by surgical excision and terbinafine treatment: a case report and review of the literature. Ann Clin Microbiol Antimicrob 2017; 16:31. [PMID: 28410611 PMCID: PMC5391591 DOI: 10.1186/s12941-017-0195-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 03/21/2017] [Indexed: 12/12/2022] Open
Abstract
Background Scedosporium apiospermum is an emerging opportunistic filamentous fungus, which is notorious for its high levels of antifungal-resistance. It is able to cause localized cutaneous or subcutaneous infections in both immunocompromised and immunocompetent persons, pulmonary infections in patients with predisposing pulmonary diseases and invasive mycoses in immunocompromised patients. Subcutaneous infections caused by this fungus frequently show chronic mycetomatous manifestation. Case report We report the case of a 70-year-old immunocompromised man, who developed a fungal mycetomatous infection on his right leg. There was no history of trauma; the aetiological agent was identified by microscopic examination and ITS sequencing. This is the second reported case of S. apiospermum subcutaneous infections in Hungary, which was successfully treated by surgical excision and terbinafine treatment. After 7 months, the patient remained asymptomatic. Considering the antifungal susceptibility and increasing incidence of the fungus, Scedosporium related subcutaneous infections reported in the past quarter of century in European countries were also reviewed. Conclusions Corticosteroid treatment represents a serious risk factor of S. apiospermum infections, especially if the patient get in touch with manure-enriched or polluted soil or water. Such infections have emerged several times in European countries in the past decades. The presented data suggest that besides the commonly applied voriconazole, terbinafine may be an alternative for the therapy of mycetomatous Scedosporium infections.
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Affiliation(s)
- Eszter J Tóth
- MTA-SZTE "Lendület" Fungal Pathogenicity Mechanisms Research Group, Hungarian Academy of Sciences, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary.,Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary
| | - Géza R Nagy
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged, Hungary
| | - Mónika Homa
- MTA-SZTE "Lendület" Fungal Pathogenicity Mechanisms Research Group, Hungarian Academy of Sciences, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary.,Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary
| | - Marianna Ábrók
- Institute of Clinical Microbiology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged, Hungary
| | - Ildikó É Kiss
- Institute of Clinical Microbiology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged, Hungary
| | - Gábor Nagy
- MTA-SZTE "Lendület" Fungal Pathogenicity Mechanisms Research Group, Hungarian Academy of Sciences, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary.,Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary
| | - Zsuzsanna Bata-Csörgő
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged, Hungary
| | - Lajos Kemény
- Department of Dermatology and Allergology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged, Hungary
| | - Edit Urbán
- Institute of Clinical Microbiology, Albert Szent-Györgyi Medical Centre, University of Szeged, Szeged, Hungary
| | - Csaba Vágvölgyi
- Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary
| | - Tamás Papp
- MTA-SZTE "Lendület" Fungal Pathogenicity Mechanisms Research Group, Hungarian Academy of Sciences, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary. .,Department of Microbiology, Faculty of Science and Informatics, University of Szeged, Közép fasor 52, Szeged, 6726, Hungary.
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Luplertlop N, Pumeesat P, Muangkaew W, Wongsuk T, Alastruey-Izquierdo A. Environmental Screening for the Scedosporium apiospermum Species Complex in Public Parks in Bangkok, Thailand. PLoS One 2016; 11:e0159869. [PMID: 27467209 PMCID: PMC4965192 DOI: 10.1371/journal.pone.0159869] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Accepted: 07/08/2016] [Indexed: 11/20/2022] Open
Abstract
The Scedosporium apiospermum species complex, comprising filamentous fungal species S. apiospermum sensu stricto, S. boydii, S. aurantiacum, S. dehoogii and S. minutispora, are important pathogens that cause a wide variety of infections. Although some species (S. boydii and S. apiospermum) have been isolated from patients in Thailand, no environmental surveys of these fungi have been performed in Thailand or surrounding countries. In this study, we isolated and identified species of these fungi from 68 soil and 16 water samples randomly collected from 10 parks in Bangkok. After filtration and subsequent inoculation of samples on Scedo-Select III medium, colony morphological examinations and microscopic observations were performed. Scedosporium species were isolated from soil in 8 of the 10 parks, but were only detected in one water sample. Colony morphologies of isolates from 41 of 68 soil samples (60.29%) and 1 of 15 water samples (6.67%) were consistent with that of the S. apiospermum species complex. Each morphological type was selected for species identification based on DNA sequencing and phylogenetic analysis of the β-tubulin gene. Three species of the S. apiospermum species complex were identified: S. apiospermum (71 isolates), S. aurantiacum (6 isolates) and S. dehoogii (5 isolates). In addition, 16 sequences could not be assigned to an exact Scedosporium species. According to our environmental survey, the S. apiospermum species complex is widespread in soil in Bangkok, Thailand.
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Affiliation(s)
- Natthanej Luplertlop
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
- Center for Emerging and Neglected Infectious Diseases, Mahidol University, Salaya Campus, Nakorn Pathom, 73170, Thailand
- * E-mail:
| | - Potjaman Pumeesat
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
- Department of Medical Technology, Faculty of Science and Technology, Bansomdejchaopraya Rajabhat University, Bangkok, 10600, Thailand
| | - Watcharamat Muangkaew
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
| | - Thanwa Wongsuk
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, 10400, Thailand
- Department of Clinical Pathology, Faculty of Medicine, Vajira Hospital, Navamindradhiraj University, Bangkok, 10300, Thailand
| | - Ana Alastruey-Izquierdo
- National Centre for Microbiology, Instituto de Salud Carlos III, Majadahonda, 228220, España
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