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Singh P, Jaime R, Puckett RD, Lake J, Papangelis A, Gabri Martin VM, Michailides T. Ochratoxin A contamination of California pistachios and identification of causal agents. Plant Dis 2023. [PMID: 38115568 DOI: 10.1094/pdis-06-23-1233-re] [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] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Ochratoxin A (OTA) is a potent mycotoxin produced by Aspergillus and Penicillium spp., which contaminates many crops, including pistachios. Pistachios contaminated with OTA may be subjected to border rejections resulting in significant economic losses to the United States agricultural revenues. The current study examined prevalence of OTA in California grown pistachios and identified its causal agents. OTA was detected in 20% samples from 2018-21 (n=809), with 18% samples exceeding the European Union regulatory limit of 5 µg/kg. Fungi potentially responsible for OTA contamination were isolated from leaves, nuts, and soil collected from 14 pistachio orchards across California. A total of 1,882 isolates of Aspergillus section Nigri and 85 isolates of section Circumdati were recovered. Within section Nigri, 216 (11.5%) isolates were identified as potential OTA producers using a boscalid-resistance assay. Phylogenetic analyses of partial gene sequences for β-tubulin and calmodulin genes resolved section Circumdati into four species: A. ochraceus (33%), A. melleus (28%), A. bridgeri (21%), and A. westerdijkiae (19%). Aspergillus westerdijkiae produced the highest levels of OTA in inoculated pistachios (47 µg/g), followed by A. ochraceus (9.6 µg/g) and A. melleus (3.3 µg/g). Aspergillus bridgeri did not produce OTA. OTA production by section Circumdati was optimal from 20 to 30ºC. All 216 boscalid-resistant isolates from section Nigri were identified as A. tubingensis and representative isolates (n =130) produced 3.8 µg/kg OTA in inoculated pistachios. This is the first detailed report on OTA contamination and causal fungi in California pistachios and will be helpful in devising effective management strategies.
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Affiliation(s)
- Pummi Singh
- University of California Davis, 8789, Plant Pathology, 9240 South Riverbend Ave., Parlier, California, United States, 93648;
| | - Ramon Jaime
- UC-Davis, Plant Pathology, PARLIER, California, United States;
| | - Ryan D Puckett
- University of Caliofrnia, Kearney Plant Pathology, Parlier, California, United States;
| | | | | | | | - Themis Michailides
- University of California, Agriculture & Natural Resources, Kearney Agric. Research and Extesnion Center, 9240 South Riverbend Ave., Parlier, California, United States, 93648;
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Imbert S, Normand AC, Costa D, Gabriel F, Lachaud L, Schuttler C, Cassaing S, Mahinc C, Hasseine L, Demar M, Brun S, Bonnal C, Moreno-Sabater A, Becker P, Piarroux R, Fekkar A. Multicentric Analysis of the Species Distribution and Antifungal Susceptibility of Clinical Isolates from Aspergillus Section Circumdati. Antimicrob Agents Chemother 2023; 67:e0146222. [PMID: 36892306 PMCID: PMC10112188 DOI: 10.1128/aac.01462-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 02/05/2023] [Indexed: 03/10/2023] Open
Abstract
The clinical involvement and antifungal susceptibility of Aspergillus section Circumdati are poorly known. We analyzed 52 isolates, including 48 clinical isolates, belonging to 9 species inside the section Circumdati. The whole section exhibited, by the EUCAST reference method, a poor susceptibility to amphotericin B, but species/series-specific patterns were observed for azole drugs. This underlines the interest in getting an accurate identification inside the section Circumdati to guide the choice of antifungal treatment in clinical practice.
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Affiliation(s)
- S. Imbert
- AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Service de Parasitologie Mycologie, Paris, France
- Sorbonne Université, Inserm, CNRS, Centre d’Immunologie et des Maladies Infectieuses, Paris, France
| | - A. C. Normand
- AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Service de Parasitologie Mycologie, Paris, France
| | - D. Costa
- Centre Hospitalier Universitaire de Rouen, Service de Parasitologie Mycologie, Rouen, France
| | - F. Gabriel
- Centre Hospitalier Universitaire de Bordeaux, Service de Parasitologie Mycologie, Bordeaux, France
| | - L. Lachaud
- Centre Hospitalier Universitaire de Montpellier, Service de Parasitologie Mycologie, Montpellier, France
| | | | - S. Cassaing
- Centre Hospitalier Universitaire de Toulouse, Service de Parasitologie Mycologie, Toulouse, France
| | - C. Mahinc
- Centre Hospitalier Universitaire de Saint Etienne, Service de Parasitologie Mycologie, Saint Etienne, France
| | - L. Hasseine
- Centre Hospitalier Universitaire de Nice, Service de Parasitologie Mycologie, Nice, France
| | - M. Demar
- Centre Hospitalier de Cayenne, Département de Parasitologie Mycologie, Cayenne, French Guiana
| | - S. Brun
- AP-HP, Hôpital Avicenne, Service de Parasitologie Mycologie, Bobigny, France
| | - C. Bonnal
- AP-HP, Hôpital Bichat-Claude Bernard, Service de Parasitologie Mycologie, Paris, France
| | - A. Moreno-Sabater
- AP-HP, Hôpital Saint-Antoine, Service de Parasitologie Mycologie, Paris, France
| | - P. Becker
- Service of Mycology and Aerobiology, BCCM/IHEM Fungal Collection, Brussels, Belgium
| | - R. Piarroux
- AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Service de Parasitologie Mycologie, Paris, France
| | - A. Fekkar
- AP-HP, Groupe Hospitalier La Pitié-Salpêtrière, Service de Parasitologie Mycologie, Paris, France
- Sorbonne Université, Inserm, CNRS, Centre d’Immunologie et des Maladies Infectieuses, Paris, France
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Silva ARPD, Fungaro MHP, Silva JJ, Martins LM, Taniwaki MH, Iamanaka BT. Ochratoxin A and related fungi in Brazilian black pepper (Piper nigrum L.). Food Res Int 2021; 142:110207. [PMID: 33773682 DOI: 10.1016/j.foodres.2021.110207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 01/30/2021] [Accepted: 01/31/2021] [Indexed: 11/15/2022]
Abstract
Ochratoxin A (OTA) is a mycotoxin with nephrotoxic, genotoxic, teratogenic and carcinogenic properties, produced by several species of Aspergillus, mainly those belonging to the A. section Circumdati and A. section Nigri. Although this toxin has been detected in spices and condiments, in black pepper (Piper nigrum L.) few studies have investigated the mycobiota (based on a molecular approach) and the presence of OTA in this food. The aim of this study was to investigate the presence of potentially ochratoxigenic species and ochratoxin A in black pepper marketed in Brazil, one of the largest producers in the world. A total of 60 samples of black pepper (29 in powder and 31 in grain) were collected in markets. The presence of OTA was investigated in black pepper samples using High-Performance Liquid Chromatography (HPLC), OTA was detected in 55% of the samples, with levels ranging from 0.05 to 13.15 μg/kg, all of which were below the Brazilian legal tolerances. A. section Nigri and A. section Circumdati were found in 80% of the samples, but the species of A. section Nigri were significantly more frequent than those of A. section Circumdati. The potential for OTA production by fungal isolates was tested using the agar plug technique and confirmed by HPLC. Among the isolates belonging to A. section Nigri (n = 1,083) and A. section Circumdati (n = 129), 3.7% and 3.8%, respectively, were able to produce OTA in Yeast Extract Sucrose Agar (YESA). A total of 25 strains from A. section Circumdati and 64 from A. section Nigri were identified using molecular data. The following potentially ochratoxigenic species were found in black pepper: A. niger, A. welwitschiae, A. carbonarius, A. westerdijkiae and A. ochraceus. The occurrence of these species denotes the need for continuous monitoring of black pepper by regulatory bodies in order to safeguard consumers' health.
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Akbar A, Medina A, Magan N. Potential Control of Mycotoxigenic Fungi and Ochratoxin A in Stored Coffee Using Gaseous Ozone Treatment. Microorganisms 2020; 8:microorganisms8101462. [PMID: 32977688 PMCID: PMC7598593 DOI: 10.3390/microorganisms8101462] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 09/19/2020] [Accepted: 09/21/2020] [Indexed: 12/25/2022] Open
Abstract
The objective of this study was to examine the effect of treatment of Arabica green coffee beans with gaseous ozone (O3) for the control of ochratoxigenic fungi and ochratoxin A (OTA) contamination by Aspergillus westerdijkiae, A. ochraceus, and A. carbonarius during storage. Studies included (i) relative control of the populations of each of these three species when inoculated on irradiated green coffee beans of different initial water availabilities using 400 and 600 ppm gaseous O3 treatment for 60 min at a flow rate of 6 L−1 and on OTA contamination after 12 days storage at 30 °C and (ii) effect of 600 ppm O3 treatment on natural populations of green stored coffee beans at 0.75, 0.90, and 0.95 water activity (aw) or with additional inoculum of a mixture of these three ochratoxigenic fungi after treatment and storage for 12 days at 30 °C on fungal populations and OTA contamination. Exposure to 400 and 600 ppm O3 of coffee beans inoculated with the toxigenic species showed that there was less effect on fungal populations at the lowered aw (0.75). However, toxigenic fungal populations significantly increased 48 h after exposure and when stored at 0.90 and 0.95 aw for 12 days. All three species produced high amounts of OTA in both O3 treatments of the wetter coffee beans at 0.90 and 0.95 aw. Gaseous O3 (600 ppm) treatment of naturally contaminated green coffee beans had little effect on fungal populations after treatment, regardless of the initial aw level. However, after storage, there was some reduction (26%) observed in coffee at 0.95 aw. In addition, no fungal populations or OTA contamination occurred in the 0.75 and 0.90 aw treatments after exposure to 600 ppm gaseous O3 and storage for 12 days. It appears that under wetter conditions (≥0.90–95 aw) it is unlikely that fungal populations and OTA contamination of stored coffee beans, even with such high O3 concentrations would be controlled. The results are discussed in the context of potential application of O3 as an intervention system for stored coffee post-fermentation and during medium term storage and transport.
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Hirose M, Noguchi H, Yaguchi T, Matsumoto T, Hiruma M, Fukushima S, Ihn H. Onychomycosis caused by Aspergillus subramanianii. J Dermatol 2018; 45:1362-1366. [PMID: 30144137 DOI: 10.1111/1346-8138.14616] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 07/24/2018] [Indexed: 11/30/2022]
Abstract
We describe a case of a 23-year-old female patient with no apparent underlying diseases. She showed a discoloration of the proximal portion of the left big toenail with paronychia. Direct microscopy revealed septate hyphae with conidiophores, and a periodic acid-Schiff-stained nail specimen revealed septate hyphae branching at angles of approximately 45°. On the basis of phylogenetic analysis, we finally arrived at the diagnosis of ungual aspergillosis caused by Aspergillus subramanianii. After p.o. administration of terbinafine and topical application of 10% efinaconazole solution, the disease resolved in 6 months. A. subramanianii is one of the new species in the genus Aspergillus section Circumdati. Reported clinical isolates have been isolated from lung tissue, wounds and feet. This is the first documented case of onychomycosis caused by A. subramanianii. Onychomycosis due to Aspergillus species is uncommon. We summarized the reported cases of ungual aspergillosis in Japan.
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Affiliation(s)
- Miki Hirose
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Hiromitsu Noguchi
- Noguchi Dermatology Clinic, Kumamoto, Japan.,Ochanomizu Institute for Medical Mycology and Allergology, Tokyo, Japan
| | - Takashi Yaguchi
- Division of Bio-resources, Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Tadahiko Matsumoto
- Noguchi Dermatology Clinic, Kumamoto, Japan.,Ochanomizu Institute for Medical Mycology and Allergology, Tokyo, Japan
| | - Masataro Hiruma
- Ochanomizu Institute for Medical Mycology and Allergology, Tokyo, Japan
| | - Satoshi Fukushima
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Hironobu Ihn
- Department of Dermatology and Plastic Surgery, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
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Lucchetta G, Bazzo I, Cortivo GD, Stringher L, Bellotto D, Borgo M, Angelini E. Occurrence of black aspergilli and ochratoxin A on grapes in Italy. Toxins (Basel) 2010; 2:840-55. [PMID: 22069613 PMCID: PMC3153195 DOI: 10.3390/toxins2040840] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 04/14/2010] [Accepted: 04/20/2010] [Indexed: 12/02/2022] Open
Abstract
Ochratoxin A (OTA) in wine is linked to contamination by several Aspergillus species. In 2003–2007, grape samples collected in Italy were surveyed for the presence of OTA and OTA-producing fungi. A. niger aggregate was the prevalent species. A. carbonarius, which is considered the main source of OTA in grapes, was mostly found in Southern Italy. The year and the environment had an important influence on the development of the black Aspergillus populations. Testing with ELISA showed OTA to be present in about 30% of the samples. Samples from Southern Italy showed the highest occurrence (45%) and also the highest OTA concentration, sometimes higher than 2 μg/L. The values decreased progressively the further North the samples were taken.
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Affiliation(s)
- Gianluca Lucchetta
- CRA-VIT Centro di Ricerca per la Viticoltura, Viale XXVIII aprile 26, I-31015 Conegliano (TV), Italy.
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