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Gao Z, Luo K, Zhu Q, Peng J, Liu C, Wang X, Li S, Zhang H. The natural occurrence, toxicity mechanisms and management strategies of Fumonisin B1:A review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 320:121065. [PMID: 36639041 DOI: 10.1016/j.envpol.2023.121065] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/30/2022] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Fumonisin B1 (FB1) contaminates various crops, causing huge losses to agriculture and livestock worldwide. This review summarizes the occurrence regularity, toxicity, toxic mechanisms and management strategies of FB1. Specifically, FB1 contamination is particularly serious in developing countries, humid and hot regions. FB1 exposure can produce different toxic effects on the nervous system, respiratory system, digestive system and reproductive system. Furthermore, FB1 can also cause systemic immunotoxicity. The mechanism of toxic effects of FB1 is to interfere with the normal pathway of sphingolipid de novo biosynthesis by acting as a competitive inhibitor of ceramide synthase. Meanwhile, the toxic products of sphingolipid metabolic disorders can cause oxidative stress and apoptosis. FB1 also often causes feed contamination by mixing with other mycotoxins, and then exerts combined toxicity. For detection, lateral flow dipstick technology and enzyme linked immunosorbent assay are widely used in the detection of FB1 in commercial feeds, while mainstream detection methods such as high performance liquid chromatography and liquid chromatography-mass spectrometry are widely used in the laboratory theoretical study of FB1. For purification means of FB1, some natural plant extracts (such as Zingiber officinale and Litsea Cubeba essential oil) and their active compounds have been proved to inhibit the toxic effects of FB1 and protect livestock due to their antifungal and antioxidant effects. Natural plant extract has the advantages of high efficiency, low cost and no contamination residue. This review can provide information for comprehensive understanding of FB1, and provide reference for formulating reasonable treatment and management strategies in livestock production.
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Affiliation(s)
- Zhicheng Gao
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Kangxin Luo
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Qiuxiang Zhu
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Jinghui Peng
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Chang Liu
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Xiaoyue Wang
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Shoujun Li
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China
| | - Haiyang Zhang
- Guangdong Provincial Key Laboratory of Prevention and Control for Severe Clinical Animal Diseases, College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong Province, 510642, People's Republic of China.
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Adelusi OA, Gbashi S, Adebiyi JA, Makhuvele R, Aasa AO, Oladeji OM, Khoza M, Okoth S, Njobeh PB. Seasonal Diversity and Occurrence of Filamentous Fungi in Smallholder Dairy Cattle Feeds and Feedstuffs in South Africa. J Fungi (Basel) 2022; 8:jof8111192. [PMID: 36422014 PMCID: PMC9696519 DOI: 10.3390/jof8111192] [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: 10/13/2022] [Revised: 11/03/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
This study investigated 65 (35 in summer and 30 in winter) smallholder dairy cattle feeds from Free State and Limpopo provinces in South Africa from 2018 to 2019 for fungal contamination and assessed the impacts of seasonal variation on fungal contamination levels, isolation frequency, and diversity. Samples were examined for fungal contamination using macro- and microscopic approaches, and their identities were confirmed by molecular means. A total of 217 fungal isolates from 14 genera, including Aspergillus, Fusarium, and Penicillium, were recovered from feeds from both seasons. The most prevalent fungal species recovered were A. fumigatus and P. crustosum. Mycological analyses showed that 97% of samples were contaminated with one or more fungal isolates, with the summer fungal mean level (6.1 × 103 to 3.0 × 106 CFU/g) higher than that of feeds sampled during winter (mean level: 1.1 × 103 to 4.1 × 105 CFU/g). Independent sample t-test revealed that the isolation frequencies of the genera Aspergillus and Fusarium were significantly (p ≤ 0.05) higher in summer than winter, while Penicillium prevalence in both seasons was not statistically (p > 0.05) different. Furthermore, the Shannon−Weiner diversity index (H′) revealed a higher fungal diversity in summer (H′ = 2.8) than in winter (H′ = 2.1). This study on fungal contamination could be used for future fungal control and mycotoxin risk management in South Africa.
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Affiliation(s)
- Oluwasola Abayomi Adelusi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
- Correspondence: (O.A.A.); (P.B.N.)
| | - Sefater Gbashi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
| | - Janet Adeyinka Adebiyi
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
| | - Rhulani Makhuvele
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
| | - Adeola Oluwakemi Aasa
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
| | - Oluwaseun Mary Oladeji
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
| | - Minenhle Khoza
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
| | - Sheila Okoth
- Department of Biological sciences, University of Nairobi, Nairobi P.O. Box 30197-00100, Kenya
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, Johannesburg P.O. Box 17011, South Africa
- Correspondence: (O.A.A.); (P.B.N.)
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Muhammad HK, Muhammad HL, Njobeh PB, Monjerezi M, Matumba L, Makun HA. Mycotoxin levels and characterization of natural anti-fungal phytochemicals in pearl millet (Pennisetum glaucum) from Nigeria's six agroecological zones. Mycotoxin Res 2022; 38:243-252. [PMID: 35922686 DOI: 10.1007/s12550-022-00465-z] [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: 02/21/2022] [Revised: 07/08/2022] [Accepted: 07/25/2022] [Indexed: 11/26/2022]
Abstract
This study reports levels of multiple mycotoxins across Nigeria's six agro-ecological zones and corresponding levels of natural anti-fungal phytochemicals present in pearl millet (PM). 220 representative composite samples of PM were collected for mycotoxin analysis using ultrahigh performance liquid chromatography-mass spectrometry (UHPLC-MS), and 24 were randomly selected for determination of metabolites using gas chromatography-high resolution time of flight-mass spectrometry (GC-HRTOF-MS). In total, 15 mycotoxins were detected, all with levels below the European Union (EU) permissible limits and level of aflatoxins only up to 1.34 µg/kg. This is in sharp contrast to high levels of mycotoxins reported in maize samples from the same agroecological zones. Phytochemical analysis of the same samples identified a total of 88 metabolites, 30 of which are known anti-fungal properties from other previously published studies. The most common of these include methyl ester, bis (2-ethylhexyl) phthalate, and ç-tocopherol. The number of anti-fungal metabolites recovered from each sample ranged from 3 to 17 and varied widely in both number and composition across the agroecological zones. The anti-fungal metabolites may probably make PM less susceptible to fungal proliferation compared to other grains. Hence, it is worth exploring for possible sources of biological control products from PM.
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Affiliation(s)
- Hadiza Kudu Muhammad
- Food and Toxicology Research Group (FTRG), Department of Biochemistry, Federal University of Technology, P.M.B. 65, Minna, Nigeria.
- Department of Biotechnology and Food Technology, Doornfontein Campus, University of Johannesburg, P.O. Box 17011, Gauteng, 2028, South Africa.
- Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology Minna, Minna, Nigeria.
| | - Hadiza Lami Muhammad
- Food and Toxicology Research Group (FTRG), Department of Biochemistry, Federal University of Technology, P.M.B. 65, Minna, Nigeria
- Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology Minna, Minna, Nigeria
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Doornfontein Campus, University of Johannesburg, P.O. Box 17011, Gauteng, 2028, South Africa
| | - Maurice Monjerezi
- Department of Chemistry, University of Malawi, P.O. Box 280, Zomba, Malawi
| | - Limbikani Matumba
- Food Technology and Nutrition Group-NRC, Lilongwe University of Agriculture and Natural Resources (LUANAR), P.O. Box 143, Lilongwe, Malawi
| | - Hussaini Anthony Makun
- Food and Toxicology Research Group (FTRG), Department of Biochemistry, Federal University of Technology, P.M.B. 65, Minna, Nigeria
- Africa Centre of Excellence for Mycotoxin and Food Safety, Federal University of Technology Minna, Minna, Nigeria
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Mousavi Khaneghah A, Farhadi A, Nematollahi A, Vasseghian Y, Fakhri Y. A systematic review and meta-analysis to investigate the concentration and prevalence of trichothecenes in the cereal-based food. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.05.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Ekwomadu TI, Dada TA, Nleya N, Gopane R, Sulyok M, Mwanza M. Variation of Fusarium Free, Masked, and Emerging Mycotoxin Metabolites in Maize from Agriculture Regions of South Africa. Toxins (Basel) 2020; 12:E149. [PMID: 32121210 PMCID: PMC7150761 DOI: 10.3390/toxins12030149] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 12/09/2019] [Accepted: 01/08/2020] [Indexed: 02/05/2023] Open
Abstract
The presence of mycotoxins in cereal grain is a very important food safety issue with the occurrence of masked mycotoxins extensively investigated in recent years. This study investigated the variation of different Fusarium metabolites (including the related regulated, masked, and emerging mycotoxin) in maize from various agriculture regions of South Africa. The relationship between the maize producing regions, the maize type, as well as the mycotoxins was established. A total of 123 maize samples was analyzed by a LC-MS/MS multi-mycotoxin method. The results revealed that all maize types exhibited a mixture of free, masked, and emerging mycotoxins contamination across the regions with an average of 5 and up to 24 out of 42 investigated Fusarium mycotoxins, including 1 to 3 masked forms at the same time. Data obtained show that fumonisin B1, B2, B3, B4, and A1 were the most prevalent mycotoxins and had maximum contamination levels of 8908, 3383, 990, 1014, and 51.5 µg/kg, respectively. Deoxynivalenol occurred in 50% of the samples with a mean concentration of 152 µg/kg (max 1380 µg/kg). Thirty-three percent of the samples were contaminated with zearalenone at a mean concentration of 13.6 µg/kg (max 146 µg/kg). Of the masked mycotoxins, DON-3-glucoside occurred at a high incidence level of 53%. Among emerging toxins, moniliformin, fusarinolic acid, and beauvericin showed high occurrences at 98%, 98%, and 83%, and had maximum contamination levels of 1130, 3422, and 142 µg/kg, respectively. Significant differences in the contamination pattern were observed between the agricultural regions and maize types.
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Affiliation(s)
- Theodora Ijeoma Ekwomadu
- Department of Biological Sciences, Faculty of Natural and Agricultural Sciences, Mafikeng Campus, North-West University, Mmabatho 2735, South Africa;
| | - Toluwase Adeseye Dada
- Department of Animal Health, Faculty of Natural and Agricultural Sciences, Mafikeng Campus, North-West University, Mmabatho 2735, South Africa; (T.A.D.); (N.N.); (M.M.)
| | - Nancy Nleya
- Department of Animal Health, Faculty of Natural and Agricultural Sciences, Mafikeng Campus, North-West University, Mmabatho 2735, South Africa; (T.A.D.); (N.N.); (M.M.)
| | - Ramokone Gopane
- Department of Biological Sciences, Faculty of Natural and Agricultural Sciences, Mafikeng Campus, North-West University, Mmabatho 2735, South Africa;
| | - Michael Sulyok
- Department of Agro Biotechnology (IFA-Tulln), University of Natural Resources and Life Sciences Vienna (BOKU), A-3430 Tulln, Austria;
| | - Mulunda Mwanza
- Department of Animal Health, Faculty of Natural and Agricultural Sciences, Mafikeng Campus, North-West University, Mmabatho 2735, South Africa; (T.A.D.); (N.N.); (M.M.)
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Boatemaa S, Barney M, Drimie S, Harper J, Korsten L, Pereira L. Awakening from the listeriosis crisis: Food safety challenges, practices and governance in the food retail sector in South Africa. Food Control 2019; 104:333-342. [PMID: 39015434 PMCID: PMC7616224 DOI: 10.1016/j.foodcont.2019.05.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background The recent listeriosis outbreak in South Africa brought food safety concerns to the fore in terms of both policy and practice. These concerns encompass both health and nutrition aspects, as well as the economy, because the food system in South Africa contributes significantly to economic growth and food security. However, the food sector is challenged with food safety risks, such as foodborne diseases, food fraud and a general lack of effective enforcement of regulation. The inability of government to effectively regulate the food sector is a contributing factor to increased food safety risks. Focusing on the formal sector, which is subject to regulation, this review provides an overview of the current state of food safety policies and regulations, food safety challenges, and food safety practices in the food system, after the listeriosis crisis of 2017 and 2018. Method This study used a systematic process to review three sets of data in South Africa: food safety related public policies and regulations, company reports (2013-2018) and media articles (May 2017-May 2018). Food safety policies were selected from a food system policy database created by the research team. The company reports were retrieved from their websites. Factivia was used to search for the media articles. The data were thematically analyzed. The analysis framework was informed by the Food and Agriculture Organization's (FAO) food safety risk analysis. Activities related to food safety risk analysis: risk assessment, risk management, and risk communication were searched for in each material included in the study. Results Seventy-four documents made up of 13 policies, 47 media articles and 15 company reports were reviewed. Food safety is regulated by three governments departments: Department of Health (DOH), Department of Agriculture, Forestry and Fisheries (DAFF), and Department of Trade and Industry (DTI) through bylaws and regulations. The departments are directly (DAFF) or indirectly (DOH through municipal or metro Environmental Health Professional) involved in food safety enforcement, surveillance, and education. The enforcement of different regulatory processes is often poorly coordinated. Responding to this regulatory environment, food safety activities of the food retail industry include a self-regulatory system reliant on internal and third-party food audits, worker training, external testing, and consumer education. Given this fragmented framework and the lack of interaction, it is clear that the governance of the South African food safety system is not "fit for purpose" in that there is a gap in the effectiveness of government regulation and the self-regulation of the formal sector, and a growing risk from an inability to regulate the large informal sector. Food safety challenges identified in our analysis included disease outbreaks, concerns over mislabeling, and lack of regulation for food handling and distribution. Conclusion The findings suggest that there should be a combination of responsibility from all levels of stake-holders in the food retail sector in order to improve food safety and prevent food safety breaches. In addition, strong governance of the food safety system is required to enable effective legislation and enforcement.
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Affiliation(s)
- Sandra Boatemaa
- Centre for Complex Systems in Transition, Stellenbosch University, Stellenbosch, South Africa
| | | | - Scott Drimie
- Centre for Complex Systems in Transition, Stellenbosch University, Stellenbosch, South Africa
| | - Julia Harper
- Food Security Initiative, Stellenbosch University, Stellenbosch, South Africa
| | - Lise Korsten
- Food Security and Department of Plant and Soil Sciences, University of Pretoria, Pretoria, South Africa
| | - Laura Pereira
- Centre for Complex Systems in Transition, Stellenbosch University, Stellenbosch, South Africa
- Centre for Food Policy, City University of London, London, United Kingdom
- School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa
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Kamle M, Mahato DK, Devi S, Lee KE, Kang SG, Kumar P. Fumonisins: Impact on Agriculture, Food, and Human Health and their Management Strategies. Toxins (Basel) 2019; 11:E328. [PMID: 31181628 PMCID: PMC6628439 DOI: 10.3390/toxins11060328] [Citation(s) in RCA: 90] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 11/17/2022] Open
Abstract
The fumonisins producing fungi, Fusarium spp., are ubiquitous in nature and contaminate several food matrices that pose detrimental health hazards on humans as well as on animals. This has necessitated profound research for the control and management of the toxins to guarantee better health of consumers. This review highlights the chemistry and biosynthesis process of the fumonisins, their occurrence, effect on agriculture and food, along with their associated health issues. In addition, the focus has been put on the detection and management of fumonisins to ensure safe and healthy food. The main focus of the review is to provide insights to the readers regarding their health-associated food consumption and possible outbreaks. Furthermore, the consumers' knowledge and an attempt will ensure food safety and security and the farmers' knowledge for healthy agricultural practices, processing, and management, important to reduce the mycotoxin outbreaks due to fumonisins.
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Affiliation(s)
- Madhu Kamle
- Department of Forestry, North Eastern Regional Institute of Science and Technology, Nirjuli-791109, Arunachal Pradesh, India.
| | - Dipendra K Mahato
- School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Hwy, Burwood VIC 3125, Australia.
| | - Sheetal Devi
- SAB Miller India Ltd., Sonipat, Haryana 131001, India.
| | - Kyung Eun Lee
- Molecular Genetics Laboratory, Department of Biotechnology, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Korea.
| | - Sang G Kang
- Molecular Genetics Laboratory, Department of Biotechnology, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 38541, Korea.
- Stemforce, 302 Institute of Industrial Technology, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea.
| | - Pradeep Kumar
- Department of Forestry, North Eastern Regional Institute of Science and Technology, Nirjuli-791109, Arunachal Pradesh, India.
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Lulamba TE, Stafford RA, Njobeh PB. A sub-Saharan African perspective on mycotoxins in beer - a review. JOURNAL OF THE INSTITUTE OF BREWING 2019. [DOI: 10.1002/jib.558] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Tshikala Eddie Lulamba
- Department of Biotechnology and Food Technology, Faculty of Science; University of Johannesburg; Doornfontein Campus, CnrSiemert & Beit Streets, 2028 Johannesburg - New Doornfontein Johannesburg South Africa
| | - Robert A. Stafford
- Department of Biotechnology and Food Technology, Faculty of Science; University of Johannesburg; Doornfontein Campus, CnrSiemert & Beit Streets, 2028 Johannesburg - New Doornfontein Johannesburg South Africa
| | - Patrick Berka Njobeh
- Department of Biotechnology and Food Technology, Faculty of Science; University of Johannesburg; Doornfontein Campus, CnrSiemert & Beit Streets, 2028 Johannesburg - New Doornfontein Johannesburg South Africa
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Cendoya E, Nichea MJ, Monge MP, Sulyok M, Chiacchiera SM, Ramirez ML. Fumonisin occurrence in wheat-based products from Argentina. FOOD ADDITIVES & CONTAMINANTS PART B-SURVEILLANCE 2018; 12:31-37. [PMID: 30280644 DOI: 10.1080/19393210.2018.1520308] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In Argentina, wheat is the most consumed cereal by the human population. Since fumonisins occurence in wheat grains and wheat-based products have been reported worldwide, a survey was conducted in order to determine fumonisin contamination in 91 wheat-based products (white wheat flour samples, wheat flour used at bakery products and whole-wheat flour samples) collected from different retail stores of Rio Cuarto city in Argentina using HPLC-MS/MS. Sixty-seven samples (74%) showed contamination by fumonisins. From these samples, 16 showed fumonisin levels between LOD and LOQ (between 0.01 to 0.05 ng/g), while fumonisins (FB1 + FB2) in quantifiable samples ranged from 0.05 ng/g to 18.9 ng/g. Although FB1 was more prevalent, FB2 was foun3d in higher levels than FB1. Overall, fumonisin prevalence was high, but concentrations were far below EU or USA limits set for maize and maize-based products.
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Affiliation(s)
- Eugenia Cendoya
- a Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Fco-Qcas y Naturales , Universidad Nacional de Río Cuarto , Río Cuarto, Córdoba , Argentina.,d Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
| | - Maria J Nichea
- a Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Fco-Qcas y Naturales , Universidad Nacional de Río Cuarto , Río Cuarto, Córdoba , Argentina.,d Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
| | - María P Monge
- b Departamento de Química, Facultad de Ciencias Exactas Fco-Qcas y Naturales , Universidad Nacional de Río Cuarto , Río Cuarto, Córdoba , Argentina.,d Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
| | - Michael Sulyok
- c Center for Analytical Chemistry, Departament for Agrobiotechnology (IFA-Tulln) , University of Natural Resources and Life Sciences, (BOKU) , Vienna, Tulln , Austria
| | - Stella M Chiacchiera
- b Departamento de Química, Facultad de Ciencias Exactas Fco-Qcas y Naturales , Universidad Nacional de Río Cuarto , Río Cuarto, Córdoba , Argentina.,d Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
| | - María L Ramirez
- a Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Fco-Qcas y Naturales , Universidad Nacional de Río Cuarto , Río Cuarto, Córdoba , Argentina.,d Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
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Prevalence and concentration of ochratoxin A, zearalenone, deoxynivalenol and total aflatoxin in cereal-based products: A systematic review and meta-analysis. Food Chem Toxicol 2018; 118:830-848. [DOI: 10.1016/j.fct.2018.06.037] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 06/17/2018] [Accepted: 06/18/2018] [Indexed: 01/11/2023]
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Cendoya E, Chiotta ML, Zachetti V, Chulze SN, Ramirez ML. Fumonisins and fumonisin-producing Fusarium occurrence in wheat and wheat by products: A review. J Cereal Sci 2018. [DOI: 10.1016/j.jcs.2018.02.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Cendoya E, Monge MDP, Chiacchiera SM, Farnochi MC, Ramirez ML. Influence of water activity and temperature on growth and fumonisin production by Fusarium proliferatum strains on irradiated wheat grains. Int J Food Microbiol 2017; 266:158-166. [PMID: 29216556 DOI: 10.1016/j.ijfoodmicro.2017.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 11/22/2017] [Accepted: 12/01/2017] [Indexed: 11/17/2022]
Abstract
Wheat is the most important cereal consumed by the Argentine population. In previous studies performed in durum and common wheat grains in this country it has been observed fumonisin contamination as well as high incidence of Fusarium proliferatum. Fumonisins are toxic fungal metabolites, and consumption of fumonisin-contaminated maize has been epidemiologically associated with oesophageal cancer and neural tube defects in some human populations. Using irradiated wheat-grains, the effects of abiotic factors, temperature (15, 25, and 30°C) and water activity (aW; 0.995, 0.98, 0.96, 0.94, 0.92, and 0.88), on mycelial growth and fumonisin biosynthesis were compared for three F. proliferatum strains isolated from wheat grains in Argentina. Although all isolates showed similar profiles of growth, the fumonisin production profiles were slightly different. Maximum growth rates were obtained at the highest aW (0.995) and 25°C, with growth decreasing as the aW of the medium was reduced. Maximum amounts of total fumonisins (FB1, FB2 and FB3) were produced at 0.995 aW and 15°C for 2 strains, and at 25°C and 0.995 aW for the third one. Fumonisins concentrations varied considerably depending on the aW and temperature interactions assayed. Studied strains showed different fumonisin production profiles. Two-dimensional profiles of aW by temperature interactions were developed from these data to identify areas where conditions indicate a significant risk of fumonisins accumulation on wheat. As a result, temperature and aW conditions that resulted in fumonisins production are those found during wheat grain development (especially milk and dough stages) in the field. This is the first study made using irradiated wheat grains and provides useful baseline data on conditions representing a low or a high risk for fumonisins contamination of wheat grains which is of concern because this cereal is destined mainly for human consumption.
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Affiliation(s)
- Eugenia Cendoya
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Fco-Qcas y Naturales, Universidad Nacional de Rio Cuarto, Ruta 36 Km 601, 5800 Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - María Del Pilar Monge
- Departamento de Química, Facultad de Ciencias Exactas Fco-Qcas y Naturales, Universidad Nacional de Rio Cuarto, Ruta 36 Km 601, 5800 Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Stella Maris Chiacchiera
- Departamento de Química, Facultad de Ciencias Exactas Fco-Qcas y Naturales, Universidad Nacional de Rio Cuarto, Ruta 36 Km 601, 5800 Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - María Cecilia Farnochi
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Fco-Qcas y Naturales, Universidad Nacional de Rio Cuarto, Ruta 36 Km 601, 5800 Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - María Laura Ramirez
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Exactas Fco-Qcas y Naturales, Universidad Nacional de Rio Cuarto, Ruta 36 Km 601, 5800 Río Cuarto, Córdoba, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
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Misihairabgwi JM, Ezekiel CN, Sulyok M, Shephard GS, Krska R. Mycotoxin contamination of foods in Southern Africa: A 10-year review (2007-2016). Crit Rev Food Sci Nutr 2017; 59:43-58. [PMID: 28799776 DOI: 10.1080/10408398.2017.1357003] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Major staple foods in Southern Africa are prone to mycotoxin contamination, posing health risks to consumers and consequent economic losses. Regional climatic zones favor the growth of one or more main mycotoxin producing fungi, Aspergillus, Fusarium and Penicillium. Aflatoxin contamination is mainly reported in maize, peanuts and their products, fumonisin contamination in maize and maize products and patulin in apple juice. Lack of awareness of occurrence and risks of mycotoxins, poor agricultural practices and undiversified diets predispose populations to dietary mycotoxin exposure. Due to a scarcity of reports in Southern Africa, reviews on mycotoxin contamination of foods in Africa have mainly focused on Central, Eastern and Western Africa. However, over the last decade, a substantial number of reports of dietary mycotoxins in South Africa have been documented, with fewer reports documented in Botswana, Lesotho, Malawi, Mozambique, Zambia and Zimbabwe. Despite the reported high dietary levels of mycotoxins, legislation for their control is absent in most countries in the region. This review presents an up-to-date documentation of the epidemiology of mycotoxins in agricultural food commodities and discusses the implications on public health, current and recommended mitigation strategies, legislation, and challenges of mycotoxin research in Southern Africa.
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Affiliation(s)
- J M Misihairabgwi
- a Department of Biochemistry and Microbiology, School of Medicine , University of Namibia , Windhoek, Namibia. P. Bag 13301, Windhoek , Namibia
| | - C N Ezekiel
- b Department of Microbiology , Babcock University, Ilishan Remo , Ogun State , Nigeria
| | - M Sulyok
- c Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln) , University of Natural Resources and Life Sciences Vienna (BOKU) , Konrad Lorenz Str. 20, Tulln , Austria
| | - G S Shephard
- d Mycotoxicology and Chemoprevention Research Group, Institute of Biomedical and Microbial Biotechnology , Cape Peninsula University of Technology , PO Box 1906, Bellville , South Africa
| | - R Krska
- c Center for Analytical Chemistry, Department of Agrobiotechnology (IFA-Tulln) , University of Natural Resources and Life Sciences Vienna (BOKU) , Konrad Lorenz Str. 20, Tulln , Austria
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14
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Sabillón L, Bianchini A. From Field to Table: A Review on the Microbiological Quality and Safety of Wheat-Based Products. Cereal Chem 2016. [DOI: 10.1094/cchem-06-15-0126-rw] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Luis Sabillón
- Department of Food Science and Technology, University of Nebraska–Lincoln, Lincoln, NE 68588, U.S.A
- The Food Processing Center, University of Nebraska–Lincoln, Lincoln, NE 68588, U.S.A
| | - Andréia Bianchini
- Department of Food Science and Technology, University of Nebraska–Lincoln, Lincoln, NE 68588, U.S.A
- The Food Processing Center, University of Nebraska–Lincoln, Lincoln, NE 68588, U.S.A
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15
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Hassan YI, Zhou T, Bullerman LB. Sourdough lactic acid bacteria as antifungal and mycotoxin-controlling agents. FOOD SCI TECHNOL INT 2015. [DOI: 10.1177/1082013214565722] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Sourdough starter cultures are rich sources of endogenous lactic acid bacteria. The extended shelf lives of sourdough breads are attributed to a large array of organic acids and low-molecular-weight metabolites produced during the fermentation process. Different species belonging to the lactic acid bacteria group of microorganisms, mainly Lactobacillus and Leuconostoc, are increasingly gaining the attention as possible means for inhibiting mold growth in animal feed and human food chains. In addition, certain lactic acid bacteria strains isolated from sourdough starters were also shown to reduce mycotoxins concentrations in contaminated products either by binding or degradation. This short review will summarize the findings in this context that pertain to lactic acid bacteria isolated specifically from sourdough starters and acquaint the reader with the most recent advancements in this bio-preservation trend.
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Affiliation(s)
- Yousef I Hassan
- Food Science & Technology Department, University of Nebraska-Lincoln, Nebraska, USA
- Guelph Food Research Centre, Agriculture and Agri-Food Canada (AAFC), Guelph, Ontario, Canada
| | - Ting Zhou
- Guelph Food Research Centre, Agriculture and Agri-Food Canada (AAFC), Guelph, Ontario, Canada
| | - Lloyd B Bullerman
- Food Science & Technology Department, University of Nebraska-Lincoln, Nebraska, USA
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16
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Kussaga JB, Jacxsens L, Tiisekwa BP, Luning PA. Food safety management systems performance in African food processing companies: a review of deficiencies and possible improvement strategies. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:2154-2169. [PMID: 24425418 DOI: 10.1002/jsfa.6575] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/08/2014] [Accepted: 01/15/2014] [Indexed: 06/03/2023]
Abstract
This study seeks to provide insight into current deficiencies in food safety management systems (FSMS) in African food-processing companies and to identify possible strategies for improvement so as to contribute to African countries' efforts to provide safe food to both local and international markets. This study found that most African food products had high microbiological and chemical contamination levels exceeding the set (legal) limits. Relative to industrialized countries, the study identified various deficiencies at government, sector/branch, retail and company levels which affect performance of FSMS in Africa. For instance, very few companies (except exporting and large companies) have implemented HACCP and ISO 22000:2005. Various measures were proposed to be taken at government (e.g. construction of risk-based legislative frameworks, strengthening of food safety authorities, recommend use of ISO 22000:2005, and consumers' food safety training), branch/sector (e.g. sector-specific guidelines and third-party certification), retail (develop stringent certification standards and impose product specifications) and company levels (improving hygiene, strict raw material control, production process efficacy, and enhancing monitoring systems, assurance activities and supportive administrative structures). By working on those four levels, FSMS of African food-processing companies could be better designed and tailored towards their production processes and specific needs to ensure food safety.
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Affiliation(s)
- Jamal B Kussaga
- Department of Food Science and Technology, Faculty of Agriculture, Sokoine University of Agriculture, Morogoro, Tanzania; Department of Food Safety and Food Quality, Laboratory of Food Preservation and Food Microbiology, Faculty of Bioscience Engineering, University of Ghent, 9000, Ghent, Belgium
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17
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Cendoya E, Monge MP, Palacios SA, Chiacchiera SM, Torres AM, Farnochi MC, Ramirez ML. Fumonisin occurrence in naturally contaminated wheat grain harvested in Argentina. Food Control 2014. [DOI: 10.1016/j.foodcont.2013.09.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Kong W, Wei R, Logrieco AF, Wei J, Wen J, Xiao X, Yang M. Occurrence of toxigenic fungi and determination of mycotoxins by HPLC-FLD in functional foods and spices in China markets. Food Chem 2013; 146:320-6. [PMID: 24176349 DOI: 10.1016/j.foodchem.2013.09.005] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 07/12/2013] [Accepted: 09/02/2013] [Indexed: 10/26/2022]
Abstract
Twenty-four samples including 14 functional foods and 10 spices obtained from Chinese markets were examined for their mould profile. The mycotoxin contamination levels were also determined by an optimized HPLC-FLD method. 124 fungal isolates belonging to four different genera were recovered with Aspergillus and Penicillium as predominant fungi, with an incidence of 66.1% and 15.3%, respectively. In functional foods Aspergillus niger section (57.1%) was isolated more frequently, followed by Aspergillus flavi section (50.0%) and Aspergillus ochraceus section (21.4%), with the most contaminated samples being Coix seeds. Similar fungal presence and frequency were encountered in spice with A. niger section group (60.0%) and A. flavi section (40.0%) as main fungi. Cumin and Pricklyash peel samples showed the highest fungal contamination. Four functional foods and three spices were found to be positive at low levels for mycotoxins including aflatoxin B1 (up to 0.26μg/kg) and ochratoxin A (OTA) (5.0μg/kg). The more frequently detected mycotoxin was AFB1 (16.7%).
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Affiliation(s)
- Weijun Kong
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China
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Njobeh PB, Dutton MF, Tevell Åberg A, Haggblom P. Estimation of multi-mycotoxin contamination in South African compound feeds. Toxins (Basel) 2012; 4:836-48. [PMID: 23162700 PMCID: PMC3496991 DOI: 10.3390/toxins4100836] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 09/17/2012] [Accepted: 10/08/2012] [Indexed: 11/17/2022] Open
Abstract
A total of 92 commercial compound feeds from South Africa were investigated for various mycotoxins. The data reveal the highest incidence of feed contamination for fumonisins (FB) (range: 104-2999 µg/kg) followed by deoxynivalenol (DON) (range: 124-2352 µg/kg) and zearalenone (ZEA) (range: 30-610 µg/kg). The incidence of ochratoxin A (OTA) and aflatoxins (AF)-contaminated samples were generally low, i.e., 4% and 30% of samples with levels ranging between 6.4 and 17.1 µg/kg (mean: 9.9 µg/kg) for OTA and 0.2 to 71.8 µg/kg (mean: 9.0 µg/kg) for AF. No samples contained T-2 toxin or HT-2 toxin. However, all samples analyzed were contaminated with at least one mycotoxin with a majority containing several mycotoxins. In particular, 3 of 4 positive samples mainly cattle feeds that had relatively high contents of OTA (ranging from 7 to 17.1 µg/kg) also contained high amounts of AF (>27.5 µg/kg) together with FB, DON and ZEA. Apart from a few samples, the levels of mycotoxins may be regarded as safe for livestock production in South Africa. However, the persistent co-occurrence of mycotoxins in samples, especially those at high concentrations, i.e., AF and OTA, together with other mycotoxins studied, may elicit synergistic or additive effects in animals. This should raise concern as multiple contaminations may pose a risk to livestock production and health.
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Affiliation(s)
- Patrick B. Njobeh
- Food, Environment and Health Research Group, Faculty of Health Science, University of Johannesburg, Doornfontein Campus, 2028 Gauteng, P.O. Box 17011, South Africa;
- Department of Food Technology, Faculty of Science, University of Johannesburg, Doornfontein Campus, 2028 Gauteng, P.O. Box 17011, South Africa
| | - Mike F. Dutton
- Food, Environment and Health Research Group, Faculty of Health Science, University of Johannesburg, Doornfontein Campus, 2028 Gauteng, P.O. Box 17011, South Africa;
| | - Annica Tevell Åberg
- Department of Chemistry, Environment and Food Hygiene, National Veterinary Institute (SVA), Uppsala 75189, Sweden; (A.T.A.); (P.H.)
- Division of Analytical Pharmaceutical Chemistry, Uppsala University, Uppsala 75189, Sweden
| | - Per Haggblom
- Department of Chemistry, Environment and Food Hygiene, National Veterinary Institute (SVA), Uppsala 75189, Sweden; (A.T.A.); (P.H.)
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20
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Fumonisin B1 and its co-occurrence with other fusariotoxins in naturally-contaminated wheat grain. Food Control 2012. [DOI: 10.1016/j.foodcont.2011.08.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Scott P. Recent research on fumonisins: a review. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2012; 29:242-8. [DOI: 10.1080/19440049.2010.546000] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Bankole SA, Schollenberger M, Drochner W. Survey of ergosterol, zearalenone and trichothecene contamination in maize from Nigeria. J Food Compost Anal 2010. [DOI: 10.1016/j.jfca.2010.02.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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23
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Shephard GS, van der Westhuizen L, Katerere DR, Herbst M, Pineiro M. Preliminary exposure assessment of deoxynivalenol and patulin in South Africa. Mycotoxin Res 2010; 26:181-5. [DOI: 10.1007/s12550-010-0052-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 03/19/2010] [Accepted: 03/24/2010] [Indexed: 11/30/2022]
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Njobeh PB, Dutton MF, Koch SH, Chuturgoon AA, Stoev SD, Mosonik JS. Simultaneous occurrence of mycotoxins in human food commodities from Cameroon. Mycotoxin Res 2009; 26:47-57. [DOI: 10.1007/s12550-009-0039-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Revised: 10/28/2009] [Accepted: 11/10/2009] [Indexed: 11/24/2022]
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25
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Soubra L, Sarkis D, Hilan C, Verger P. Occurrence of total aflatoxins, ochratoxin A and deoxynivalenol in foodstuffs available on the Lebanese market and their impact on dietary exposure of children and teenagers in Beirut. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2009; 26:189-200. [DOI: 10.1080/02652030802366108] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yazar S, Omurtag GZ. Fumonisins, trichothecenes and zearalenone in cereals. Int J Mol Sci 2008; 9:2062-2090. [PMID: 19330061 PMCID: PMC2635619 DOI: 10.3390/ijms9112062] [Citation(s) in RCA: 240] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 10/26/2008] [Accepted: 10/28/2008] [Indexed: 11/30/2022] Open
Abstract
Fumonisins are phytotoxic mycotoxins which are synthesized by various species of the fungal genus Fusarium such as Fusarium verticillioides (Sacc.) Nirenberg (ex F.moniliforme Sheldon) and Fusarium proliferatum. The trichothecene (TC) mycotoxins are secondary metabolites produce by species that belong to several fungal genera, especially Fusarium, Stachybotrys, Trichothecium, Trichoderma, Memnoniella and Myrothecium. Fusarium mycotoxins are widely dispersed in cereals and their products. Zearalenone (ZEA) is an estrogenic compound produced by Fusarium spp. such as F. graminearum and F. culmorum. Fumonisins, the TCs and ZEA are hazardous for human and animal health. Contamination with TCs causes a number of illnesses in human and animal such as decrease in food consumption (anorexia), depression or inhibition on immune system function and haematoxicity. The purpose of this paper is to give a review of the papers published on the field of fumonisin, TC and ZEA mycotoxins in cereals consumed in the world.
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Affiliation(s)
- Selma Yazar
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Marmara University, 34668, Haydarpaşa - İstanbul, Turkey
| | - Gülden Z Omurtag
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Marmara University, 34668, Haydarpaşa - İstanbul, Turkey
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Maenetje PW, Dutton MF. The incidence of fungi and mycotoxins in South African barley and barley products. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2007; 42:229-36. [PMID: 17365338 DOI: 10.1080/03601230601125644] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Barley is grown as a crop in South Africa, mainly for use in the barley beer (lager) industry, particularly in the production of barley malt. This investigation was done to find out what fungal infection and mycotoxin contamination this barley and the malt contained. The survey, done in 2005, not only covered barley and malt but also the final product in the form of several brands of beer purchased from retail outlets. Analysis was done using a range of methodologies including chromatography, immunoaffinity/fluorimetry and cytotoxicity testing. The results show that barley, which also includes barley sold directly to the public, and malt, contain various fungi, sometimes at high incidence and also a range of mycotoxins which persisted through, although at low levels, to beer. The malt showed a different pattern of micro flora, as compared to the barley, which indicates infection during the malting process, which is not uncommon. Interestingly, fumonisin B1 was found in some of the samples, as well as the beer, although in the latter case these were at very low levels. Recent studies have shown that the immunoaffinity/fluorimetry method can give false positives for the fumonisins, so these results were confirmed by high performance liquid chromatography. As is the case with other cereals grown in South Africa, there is the concern that the public is exposed to mycotoxins on a regular basis through the consumption of products made from them.
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Affiliation(s)
- Pholo W Maenetje
- Food, Environment and Health Research Group, University of Johannesburg, Johannesburg, Gauteng, South Africa
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