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Born T, Aruanno M, Kampouri E, Mombelli M, Monney P, Tozzi P, Lamoth F. Aspergillus tubingensis Endocarditis: A Case Report and Review of the Literature. Mycopathologia 2022; 187:249-258. [PMID: 35267153 PMCID: PMC9124170 DOI: 10.1007/s11046-022-00621-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 02/12/2022] [Indexed: 11/30/2022]
Abstract
Aspergillus endocarditis is a rare infection that may affect immunocompetent patients following heart valve replacement or heart surgery. We report the case of a 39 year old woman with a history of intravenous drug use who developed endocarditis with direct examination of the resected valve and vegetation showing the presence of mycelia. Cultures were positive for an Aspergillus of section Nigri, which was subsequently identified as Aspergillus tubingensis by sequencing. The clinical course was favorable following surgery and prolonged antifungal therapy (8 months in total). Antifungal susceptibility testing showed good in vitro activity of amphotericin B, voriconazole and echinocandins against planktonic cells of this A. tubingensis isolate. However, only amphotericin B displayed significant activity against biofilms. In vitro combinations of voriconazole or amphotericin B with echinocandins did not meet the criteria of synergism. Our review of the literature identified 17 other cases of endocarditis attributed to Aspergillus of section Nigri with an overall mortality rate of 57% (100% in the absence of surgery). Endocarditis caused by Aspergillus niger and related cryptic species are rare events, for which surgical management appears to be crucial for outcome. While amphotericin B was the only antifungal drug displaying significant anti-biofilm activity, the type and duration of antifungal therapy remain to be determined.
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Affiliation(s)
- Tristan Born
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Marion Aruanno
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.,Institute of Microbiology, Department of Laboratories, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, 1011, Lausanne, Switzerland
| | - Eleftheria Kampouri
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Matteo Mombelli
- Service of Internal Medicine, Department of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Pierre Monney
- Cardiology Service, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Piergiorgio Tozzi
- Cardiac Surgery Division, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Frederic Lamoth
- Infectious Diseases Service, Department of Medicine, Lausanne University Hospital and University of Lausanne, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. .,Institute of Microbiology, Department of Laboratories, Lausanne University Hospital and University of Lausanne, Rue du Bugnon 46, 1011, Lausanne, Switzerland.
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Gil-Serna J, García-Díaz M, Vázquez C, González-Jaén MT, Patiño B. Significance of Aspergillus niger aggregate species as contaminants of food products in Spain regarding their occurrence and their ability to produce mycotoxins. Food Microbiol 2019; 82:240-248. [PMID: 31027779 DOI: 10.1016/j.fm.2019.02.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 01/10/2019] [Accepted: 02/24/2019] [Indexed: 10/27/2022]
Abstract
The Aspergillus niger aggregate contains 15 morphologically indistinguishable species which presence is related to ochratoxin A (OTA) and fumonisin B2 (FB2) contamination of foodstuffs. The taxonomy of this group was recently reevaluated and there is a need of new studies regarding the risk that these species might pose to food security. 258 isolates of A. niger aggregate obtained from a variety of products from Spain were classified by molecular methods being A. tubingensis the most frequently occurring (67.5%) followed by A. welwitschiae (19.4%) and A. niger (11.7%). Their potential ability to produce mycotoxins was evaluated by PCR protocols which allow a rapid detection of OTA and FB2 biosynthetic genes in their genomes. OTA production is not widespread in A. niger aggregate since only 17% of A. niger and 6% of A. welwitschiae isolates presented the complete biosynthetic cluster whereas the lack of the cluster was confirmed in all A. tubingensis isolates. On the other hand, A. niger and A. welwitschiae seem to be important FB2 producers with 97% and 29% of the isolates, respectively, presenting the complete cluster. The genes involved in OTA and FB2 were overexpressed in producing isolates and their expression was related to mycotoxin synthesis.
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Affiliation(s)
- Jéssica Gil-Serna
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid. Jose Antonio Nováis 12, 28040, Madrid, Spain.
| | - Marta García-Díaz
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid. Jose Antonio Nováis 12, 28040, Madrid, Spain
| | - Covadonga Vázquez
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid. Jose Antonio Nováis 12, 28040, Madrid, Spain
| | - María Teresa González-Jaén
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid. Jose Antonio Nováis 12, 28040, Madrid, Spain
| | - Belén Patiño
- Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid. Jose Antonio Nováis 12, 28040, Madrid, Spain
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