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Opoku N, Hudu AR, Addy F. Mycotoxigenic Fusarium species and zearalenone concentration in commercial maize kernels in northern Ghana. Mycotoxin Res 2024:10.1007/s12550-024-00544-3. [PMID: 39023737 DOI: 10.1007/s12550-024-00544-3] [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: 10/10/2023] [Revised: 06/24/2024] [Accepted: 06/27/2024] [Indexed: 07/20/2024]
Abstract
The fungal genus Fusarium contains many toxigenic pathogens of maize with associated yield losses, reduction of grain quality, and accumulation of mycotoxins in harvested grains. To determine zearalenone (ZEN) concentration and identify the various Fusarium species in commercial maize grains, a survey of 75 maize samples, collected from 11 market centers in the five regions in northern Ghana was identified based on morphological characteristics, sequence analysis of the internal transcribed spacer region, and polymerase chain reaction using species-specific primers. ZEN levels were determined using HPLC. ZEN contamination was recorded in 33.3% of the maize samples, with concentrations ranging from 0.61 to 3.05 µg/kg. Based on VERT1/2 and TEF 1-α sequencing, F. verticillioides was the most prevalent species in the studied samples: 40.35% from the Upper East Region, 28.07% from the North East Region, 19.30% from the Upper West Region, 10.53% from the Savannah Region, and 1.75% for the Northern Region. Other fungal species found were F. equiseti and F. solani. A higher number of the Fusarium isolates were found in white maize (609 isolates from 27 samples) compared to yellow maize (225 isolates from 23 samples).
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Affiliation(s)
- Nelson Opoku
- Department of Biotechnology and Molecular Biology, Faculty of Biosciences, University for Development Studies, Nyankpala, Tamale, Ghana.
| | - Abdul Rashid Hudu
- Department of Agricultural Biotechnology, Faculty of Agriculture, Food and Consumer Sciences, University for Development Studies, Nyankpala, Tamale, Ghana
| | - Francis Addy
- Department of Biotechnology and Molecular Biology, Faculty of Biosciences, University for Development Studies, Nyankpala, Tamale, Ghana
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Hudu AR, Addy F, Mahunu GK, Abubakari A, Opoku N. Zearalenone contamination in maize, its associated producing fungi, control strategies, and legislation in Sub-Saharan Africa. Food Sci Nutr 2024; 12:4489-4512. [PMID: 39055180 PMCID: PMC11266927 DOI: 10.1002/fsn3.4125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 02/26/2024] [Accepted: 03/13/2024] [Indexed: 07/27/2024] Open
Abstract
The fungal genus Fusarium contains many important plant pathogens as well as endophytes of wild and crop plants. Globally, Fusarium toxins in food crops are considered one of the greatest food safety concerns. Their occurrence has become more pronounced in Africa in recent times. Among the major Fusarium mycotoxins with food and feed safety concerns, zearalenone is frequently detected in finished feeds and cereals in Africa. However, the impact of indigenous agricultural practices (pre- and postharvest factors) and food processing techniques on the prevalence rate of Fusarium species and zearalenone occurrence in food and feed have not been collated and documented systematically. This review studies and analyzes recent reports on zearalenone contamination in maize and other cereal products from Africa, including its fungi producers, agronomic and climate variables impacting their occurrences, preventive measures, removal/decontamination methods, and legislations regulating their limits. Reports from relevant studies demonstrated a high prevalence of F. verticillioides and F. graminearum as Africa's main producers of zearalenone. Elevated CO2 concentration and high precipitation may carry along an increased risk of zearalenone contamination in maize. African indigenous processing methods may contribute to reduced ZEA levels in agricultural products and foods. Most African countries do not know their zearalenone status in the food supply chain and they have limited regulations that control its occurrence.
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Affiliation(s)
- Abdul Rashid Hudu
- Department of Agricultural Biotechnology, Faculty of Agriculture, Food and Consumer SciencesUniversity for Development StudiesNyankpalaGhana
| | - Francis Addy
- Department of Biotechnology and Molecular Biology, Faculty of BiosciencesUniversity for Development StudiesNyankpalaGhana
| | - Gustav Komla Mahunu
- Department of Food Science and Technology, Faculty of Agriculture, Food, and Consumer SciencesUniversity for Development StudiesNyankpalaGhana
| | - Abdul‐Halim Abubakari
- Department of Horticulture, Faculty of Agriculture, Food, and Consumer SciencesUniversity for Development StudiesNyankpalaGhana
| | - Nelson Opoku
- Department of Biotechnology and Molecular Biology, Faculty of BiosciencesUniversity for Development StudiesNyankpalaGhana
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Zhang D, Luo T, Cai X, Zhao NN, Zhang CY. Recent advances in nucleic acid signal amplification-based aptasensors for sensing mycotoxins. Chem Commun (Camb) 2024; 60:4745-4764. [PMID: 38647208 DOI: 10.1039/d4cc00982g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Mycotoxin contamination in food products may cause serious health hazards and economic losses. The effective control and accurate detection of mycotoxins have become a global concern. Even though a variety of methods have been developed for mycotoxin detection, most conventional methods suffer from complicated operation procedures, low sensitivity, high cost, and long assay time. Therefore, the development of simple and sensitive methods for mycotoxin assay is highly needed. The introduction of nucleic acid signal amplification technology (NASAT) into aptasensors significantly improves the sensitivity and facilitates the detection of mycotoxins. Herein, we give a comprehensive review of the recent advances in NASAT-based aptasensors for assaying mycotoxins and summarize the principles, features, and applications of NASAT-based aptasensors. Moreover, we highlight the challenges and prospects in the field, including the simultaneous detection of multiple mycotoxins and the development of portable devices for field detection.
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Affiliation(s)
- Dandan Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| | - Ting Luo
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| | - Xiangyue Cai
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
| | - Ning-Ning Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China.
| | - Chun-Yang Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
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Okechukwu VO, Adelusi OA, Kappo AP, Njobeh PB, Mamo MA. Aflatoxins: Occurrence, biosynthesis, mechanism of action and effects, conventional/emerging detection techniques. Food Chem 2024; 436:137775. [PMID: 37866099 DOI: 10.1016/j.foodchem.2023.137775] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 10/11/2023] [Accepted: 10/14/2023] [Indexed: 10/24/2023]
Abstract
Aflatoxins (AFs) are toxic secondary metabolites prevalent in various food and agricultural products, posing significant challenges to global food safety. The detection and quantification of AFs through high-precision analytical techniques are crucial in mitigating AF contamination levels and associated health risks. Variousmethods,including conventional and emerging techniques, have been developed for detecting and quantifyingAFsinfood samples. This review provides an in-depth analysis of the global occurrence of AF in food commodities, covering their biosynthesis, mode of action, and effects on humans and animals. Additionally, the review discusses different conventional strategies, including chromatographic and immunochemical approaches, for AF quantification and identification in food samples. Furthermore, emerging AF detection strategies, such as solid-state gas sensors and electronic nose technologies, along with their applications, limitations, and future perspectives, were reviewed. Sample purification, along with their respective advantages and limitations, are also discussed herein.
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Affiliation(s)
- Viola O Okechukwu
- Department of Biochemistry, Auckland Park Kingsway Campus, University of Johannesburg, South Africa
| | - Oluwasola A Adelusi
- Department of Biotechnology and Food Technology, PO Box 17011, Doornfontein Campus, University of Johannesburg, South Africa
| | - Abidemi P Kappo
- Department of Biochemistry, Auckland Park Kingsway Campus, University of Johannesburg, South Africa
| | - Patrick B Njobeh
- Department of Biotechnology and Food Technology, PO Box 17011, Doornfontein Campus, University of Johannesburg, South Africa
| | - Messai A Mamo
- Department of Chemical Sciences, PO Box 2028, Doornfontein Campus, University of Johannesburg, South Africa.
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Price JL, Visagie CM, Meyer H, Yilmaz N. Fungal Species and Mycotoxins Associated with Maize Ear Rots Collected from the Eastern Cape in South Africa. Toxins (Basel) 2024; 16:95. [PMID: 38393173 PMCID: PMC10891880 DOI: 10.3390/toxins16020095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/29/2024] [Accepted: 02/04/2024] [Indexed: 02/25/2024] Open
Abstract
Maize production in South Africa is concentrated in its central provinces. The Eastern Cape contributes less than 1% of total production, but is steadily increasing its production and has been identified as a priority region for future growth. In this study, we surveyed ear rots at maize farms in the Eastern Cape, and mycotoxins were determined to be present in collected samples. Fungal isolations were made from mouldy ears and species identified using morphology and DNA sequences. Cladosporium, Diplodia, Fusarium and Gibberella ear rots were observed during field work, and of these, we collected 78 samples and isolated 83 fungal strains. Fusarium was identified from Fusarium ear rot (FER) and Gibberella ear rot (GER) and Stenocarpella from Diplodia ear rot (DER) samples, respectively. Using LC-MS/MS multi-mycotoxin analysis, it was revealed that 83% of the collected samples contained mycotoxins, and 17% contained no mycotoxins. Fifty percent of samples contained multiple mycotoxins (deoxynivalenol, 15-acetyl-deoxynivalenol, diplodiatoxin and zearalenone) and 33% contained a single mycotoxin. Fusarium verticillioides was not isolated and fumonisins not detected during this survey. This study revealed that ear rots in the Eastern Cape are caused by a wide range of species that may produce various mycotoxins.
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Affiliation(s)
- Jenna-Lee Price
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South Africa; (J.-L.P.); (C.M.V.)
| | - Cobus Meyer Visagie
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South Africa; (J.-L.P.); (C.M.V.)
| | - Hannalien Meyer
- Southern African Grain Laboratory (SAGL), Grain Building-Agri Hub Office Park, 477 Witherite Street, The Willows, Pretoria 0040, South Africa;
| | - Neriman Yilmaz
- Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0028, South Africa; (J.-L.P.); (C.M.V.)
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Dib AA, Assaf JC, Debs E, Khatib SE, Louka N, Khoury AE. A comparative review on methods of detection and quantification of mycotoxins in solid food and feed: a focus on cereals and nuts. Mycotoxin Res 2023; 39:319-345. [PMID: 37523055 DOI: 10.1007/s12550-023-00501-6] [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: 04/14/2023] [Revised: 07/13/2023] [Accepted: 07/14/2023] [Indexed: 08/01/2023]
Abstract
Many emerging factors and circumstances urge the need to develop and optimize the detection and quantification techniques of mycotoxins in solid food and feed. The diversity of mycotoxins, which have different properties and affinities, makes the standardization of the analytical procedures and the adoption of a single protocol that covers the attributes of all mycotoxins a tedious or even an impossible mission. Several modifications and improvements have been undergone in order to optimize the performance of these methods including the extraction solvents, the extraction methods, the clean-up procedures, and the analytical techniques. The techniques range from the rapid screening methods, which lack sensitivity and specificity such as TLC, to a spectrum of more advanced protocols, namely, ELISA, HPLC, and GC-MS and LC-MS/MS. This review aims at assessing the current studies related to these analytical techniques of mycotoxins in solid food and feed. It discusses and evaluates, through a critical approach, various sample treatment techniques, and provides an in-depth examination of different mycotoxin detection methods. Furthermore, it includes a comparison of their actual accuracy and a thorough analysis of the observed benefits and drawbacks.
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Affiliation(s)
- Alaa Abou Dib
- Centre d'Analyses Et de Recherche (CAR), Faculté Des Sciences, Unité de Recherche Technologies Et Valorisation Agro-Alimentaire (UR-TVA), Université Saint-Joseph de Beyrouth, Campus Des Sciences Et TechnologiesMar Roukos, Matn, 1104-2020, Lebanon
- Department of Food Sciences and Technology, Faculty of Arts and Sciences, Bekaa Campus, Lebanese International University, Khiyara, 1108, Bekaa, Lebanon
| | - Jean Claude Assaf
- Department of Chemical Engineering, Faculty of Engineering, University of Balamand, P.O. Box 100, Tripoli, Lebanon
| | - Espérance Debs
- Department of Biology, Faculty of Arts and Sciences, University of Balamand, P.O. Box 100, Tripoli, 1300, Lebanon
| | - Sami El Khatib
- Department of Food Sciences and Technology, Faculty of Arts and Sciences, Bekaa Campus, Lebanese International University, Khiyara, 1108, Bekaa, Lebanon
- Center for Applied Mathematics and Bioinformatics, Gulf University for Science and Technology, Hawally, Kuwait
| | - Nicolas Louka
- Centre d'Analyses Et de Recherche (CAR), Faculté Des Sciences, Unité de Recherche Technologies Et Valorisation Agro-Alimentaire (UR-TVA), Université Saint-Joseph de Beyrouth, Campus Des Sciences Et TechnologiesMar Roukos, Matn, 1104-2020, Lebanon
| | - André El Khoury
- Centre d'Analyses Et de Recherche (CAR), Faculté Des Sciences, Unité de Recherche Technologies Et Valorisation Agro-Alimentaire (UR-TVA), Université Saint-Joseph de Beyrouth, Campus Des Sciences Et TechnologiesMar Roukos, Matn, 1104-2020, Lebanon.
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Fan Y, Li J, Amin K, Yu H, Yang H, Guo Z, Liu J. Advances in aptamers, and application of mycotoxins detection: A review. Food Res Int 2023; 170:113022. [PMID: 37316026 DOI: 10.1016/j.foodres.2023.113022] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 05/16/2023] [Accepted: 05/19/2023] [Indexed: 06/16/2023]
Abstract
Mycotoxin contamination in food products can easily cause serious health hazards and economic losses to human beings. How to accurately detect and effectively control mycotoxin contamination has become a global concern. Mycotoxins conventional detection techniques e.g; ELISA, HPLC, have limitations like, low sensitivity, high cost and time-consuming. Aptamer-based biosensing technology has the advantages of high sensitivity, high specificity, wide linear range, high feasibility, and non-destructiveness, which overcomes the shortcomings of conventional analysis techniques. This review summarizes the sequences of mycotoxin aptamers that have been reported so far. Based on the application of four classic POST-SELEX strategies, it also discusses the bioinformatics-assisted POST-SELEX technology in obtaining optimal aptamers. Furthermore, trends in the study of aptamer sequences and their binding mechanisms to targets is also discussed. The latest examples of aptasensor detection of mycotoxins are classified and summarized in detail. Newly developed dual-signal detection, dual-channel detection, multi-target detection and some types of single-signal detection combined with unique strategies or novel materials in recent years are focused. Finally, the challenges and prospects of aptamer sensors in the detection of mycotoxins are discussed. The development of aptamer biosensing technology provides a new approach with multiple advantages for on-site detection of mycotoxins. Although aptamer biosensing shows great development potential, still some challenges and difficulties are there in practical applications. Future research need high focus on the practical applications of aptasensors and the development of convenient and highly automated aptamers. This may lead to the transition of aptamer biosensing technology from laboratory to commercialization.
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Affiliation(s)
- Yiting Fan
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China.
| | - Jiaxin Li
- Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China; Universidade de Vigo, Nutrition and Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Sciences, 32004 Ourense, Spain.
| | - Khalid Amin
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China.
| | - Hansong Yu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; Division of Soybean Processing, Soybean Research & Development Center, Chinese Agricultural Research System, Changchun 130118, China.
| | - Huanhuan Yang
- College of Food Science, Heilongjiang Bayi Agricultural University, Daqing 163000, China; College of Life Science Chang Chun Normal University, Changchun 130032, China.
| | - Zhijun Guo
- College of Agriculture, Yanbian University, Yanji 133002, China.
| | - Jingsheng Liu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, China; National Engineering Laboratory for Wheat and Corn Deep Processing, Changchun, Jilin 130118, China.
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A fluorescence aptasensor based on hybridization chain reaction for simultaneous detection of T-2 toxins and zearalenone 1. Talanta 2023; 255:124249. [PMID: 36610257 DOI: 10.1016/j.talanta.2022.124249] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/29/2022] [Accepted: 12/31/2022] [Indexed: 01/03/2023]
Abstract
It is extremely necessary to establish a rapid and high-throughput method to detect mycotoxins in food, because grains and cereals are greatly vulnerable to mycotoxins before and after harvest. In this study, we developed a portable aptasensor based on streptavidin magnetic microspheres (MMPs) and hybridization chain reaction (HCR) to simultaneously detect T-2 toxin and zearalenone (ZEN) in corn and oat flour. The MMPs compete with the aptamer for binding, which releases more H0 and triggers HCR with the H1 intermediate modified using 6-FAM and BHQ-1 and the unmodified H2. Subsequently, placing the HCR system corresponding to T-2 and ZEN in a constant-temperature fluorescence detector resulted in well-recovered fluorescence of the HCR products. T-2 and ZEN exhibited good fluorescence response in the dynamic range of 0.001-10 ng mL-1 and 0.01-100 ng mL-1 with detection limits of 0.1 pg mL-1 and 1.2 pg mL-1, respectively. In addition, this strategy achieved the selective detection of T-2 and ZEN in the spiked corn and oat flour samples. The results are also in good agreement with those obtained using commercial ELISA kits. This developed aptasensor with the characteristics of simple operation and portability has the application potential of establishing sensitive and portable field detection of various mycotoxins.
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Naghshbandi B, Adabi M, Pooshang Bagheri K, Tavakolipour H. Design of a new electrochemical aptasensor based on screen printed carbon electrode modified with gold nanoparticles for the detection of fumonisin B1 in maize flour. J Nanobiotechnology 2023; 20:534. [PMID: 36588152 PMCID: PMC9806910 DOI: 10.1186/s12951-022-01745-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 12/09/2022] [Indexed: 01/03/2023] Open
Abstract
A new aptasensor for detecting fumonisin B1 (FB1) in the maize samples was developed based on DNA- aptamer recognition and electrochemical technique. A thiol-modified single-stranded DNA (ss-HSDNA) was immobilized on a screen printed carbon electrode (SPCE) electrodeposited by gold nanoparticles (AuNPs). The morphology and structure of SPCE and AuNPs/SPCE were evaluated via scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS). The SEM results demonstrated that the SPCE had a flat sheet-like structure, and the AuNPs were homogeneously electrodeposited on the SPCE. Cyclic voltammetry (CV) experiments in the [Fe(CN)6]- 3/- 4 solution were conducted to investigate each step of electrode modification as well as aptasensor performance. Aptamer-FB1 interaction prevented the electron transfer permitting the determination of FB1 in the range of 0.5-500 ng/mL with a low detection limit (0.14 ng/mL). The designed aptasensor was also shown high selectivity, acceptable repeatability and reproducibility, good long-term stability, and excellent recovery. Furthermore, there was a strong correlation between the findings achieved via the designed aptasensor and high performance liquid chromatography (HPLC). Therefore, a simple construction process and satisfactory electrochemical performance of the proposed aptasensor have a great potential for the detection of FB1 in maize samples.
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Affiliation(s)
- Behnaz Naghshbandi
- grid.411463.50000 0001 0706 2472Department of Food Science and Technology, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Mohsen Adabi
- grid.411463.50000 0001 0706 2472Department of Metallurgy and Materials Science, Roudehen Branch, Islamic Azad University, Roudehen, Iran
| | - Kamran Pooshang Bagheri
- grid.420169.80000 0000 9562 2611Venom and Biotherapeutics Molecules Lab, Medical Biotechnology Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Hamid Tavakolipour
- grid.449248.7Department of Food Science and Technology, Sabzevar Branch, Islamic Azad University, Sabzevar, Iran
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Underreported Human Exposure to Mycotoxins: The Case of South Africa. Foods 2022; 11:foods11172714. [PMID: 36076897 PMCID: PMC9455755 DOI: 10.3390/foods11172714] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/31/2022] [Accepted: 09/02/2022] [Indexed: 12/03/2022] Open
Abstract
South Africa (SA) is a leading exporter of maize in Africa. The commercial maize farming sector contributes to about 85% of the overall maize produced. More than 33% of South Africa’s population live in rural settlements, and their livelihoods depend entirely on subsistence farming. The subsistence farming system promotes fungal growth and mycotoxin production. This review aims to investigate the exposure levels of the rural population of South Africa to dietary mycotoxins contrary to several reports issued concerning the safety of South African maize. A systematic search was conducted using Google Scholar. Maize is a staple food in South Africa and consumption rates in rural and urban communities are different, for instance, intake may be 1–2 kg/person/day and 400 g/person/day, respectively. Commercial and subsistence maize farming techniques are different. There exist differences influencing the composition of mycotoxins in food commodities from both sectors. Depending on the levels of contamination, dietary exposure of South Africans to mycotoxins is evident in the high levels of fumonisins (FBs) that have been detected in SA home-grown maize. Other potential sources of exposure to mycotoxins, such as carryover effects from animal products and processed foods, were reviewed. The combined effects between FBs and aflatoxins (AFs) have been reported in humans/animals and should not be ignored, as sporadic breakouts of aflatoxicosis have been reported in South Africa. These reports are not a true representation of the entire country as reports from the subsistence-farming rural communities show high incidence of maize contaminated with both AFs and FBs. While commercial farmers and exporters have all the resources needed to perform laboratory analyses of maize products, the greater challenge in combatting mycotoxin exposure is encountered in rural communities with predominantly subsistence farming systems, where conventional food surveillance is lacking.
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Yli-Mattila T, Sundheim L. Fumonisins in African Countries. Toxins (Basel) 2022; 14:toxins14060419. [PMID: 35737080 PMCID: PMC9228379 DOI: 10.3390/toxins14060419] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/10/2022] [Accepted: 06/16/2022] [Indexed: 12/10/2022] Open
Abstract
Maize and other cereals are the commodities most contaminated with fumonisins. The maize acreage is increasing in Africa, and the maize harvest provides important foods for humans and feeds for domestic animals throughout the continent. In North Africa, high levels of fumonisins have been reported from Algeria and Morocco, while low levels have been detected in the rather few fumonisin analyses reported from Tunisia and Egypt. The West African countries Burkina Faso, Cameroon, Ghana, and Nigeria all report high levels of fumonisin contamination of maize, while the few maize samples analysed in Togo contain low levels. In Eastern Africa, high levels of fumonisin contamination have been reported from the Democratic Republic of Congo, Ethiopia, Kenya, Tanzania, and Uganda. The samples analysed from Rwanda contained low levels of fumonisins. Analysis of maize from the Southern African countries Malawi, Namibia, South Africa, Zambia, and Zimbabwe revealed high fumonisin levels, while low levels of fumonisins were detected in the few analyses of maize from Botswana and Mozambique.
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Affiliation(s)
- Tapani Yli-Mattila
- Molecular Plant Biology, Department of Life Technologies, University of Turku, FI-20014 Turku, Finland
- Correspondence: ; Tel.: 358-440560700
| | - Leif Sundheim
- Norwegian Institute for Bioeconomy Research, P.O. Box 115, N-1431 Ås, Norway;
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12
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Smaoui S, Agriopoulou S, D'Amore T, Tavares L, Mousavi Khaneghah A. The control of Fusarium growth and decontamination of produced mycotoxins by lactic acid bacteria. Crit Rev Food Sci Nutr 2022; 63:11125-11152. [PMID: 35708071 DOI: 10.1080/10408398.2022.2087594] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Global crop and food contamination with mycotoxins are one of the primary worldwide concerns, while there are several restrictions regarding approaching conventional physical and chemical mycotoxins decontamination methods due to nutrition loss, sensory attribute reduction in foods, chemical residual, inconvenient operation, high cost of equipment, and high energy consumption of some methods. In this regard, the overarching challenges of mycotoxin contamination in food and food crops require the development of biological decontamination strategies. Using certain lactic acid bacteria (LAB) as generally recognized safe (GRAS) compounds is one of the most effective alternatives due to their potential to release antifungal metabolites against various fungal factors species. This review highlights the potential applications of LAB as biodetoxificant agents and summarizes their decontamination activities against Fusarium growth and Fusarium mycotoxins released into food/feed. Firstly, the occurrence of Fusarium and the instrumental and bioanalytical methods for the analysis of mycotoxins were in-depth discussed. Upgraded knowledge on the biosynthesis pathway of mycotoxins produced by Fusarium offers new insightful ideas clarifying the function of these secondary metabolites. Moreover, the characterization of LAB metabolites and their impact on the decontamination of the mycotoxin from Fusarium, besides the main mechanisms of mycotoxin decontamination, are covered. While the thematic growth inhibition of Fusarium and decontamination of their mycotoxin by LAB is very complex, approaching certain lactic acid bacteria (LAB) is worth deeper investigations.
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Affiliation(s)
- Slim Smaoui
- Laboratory of Microbial, Enzymatic Biotechnology and Biomolecules (LBMEB), Center of Biotechnology of Sfax, University of Sfax-Tunisia, Sfax, Tunisia
| | - Sofia Agriopoulou
- Department of Food Science and Technology, University of the Peloponnese, Antikalamos, Kalamata, Greece
| | - Teresa D'Amore
- Chemistry Department, Istituto Zooprofilattico Sperimentale della Puglia e della Basilicata (IZSPB), Foggia, Italy
| | - Loleny Tavares
- Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, CEP, Brazil
| | - Amin Mousavi Khaneghah
- Department of Fruit and Vegetable Product Technology, Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology - State Research Institute, Warsaw, Poland
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Singh BK, Tiwari S, Maurya A, Kumar S, Dubey NK. Fungal and mycotoxin contamination of herbal raw materials and their protection by nanoencapsulated essential oils: An overview. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2021.102257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ekwomadu TI, Akinola SA, Mwanza M. Fusarium Mycotoxins, Their Metabolites (Free, Emerging, and Masked), Food Safety Concerns, and Health Impacts. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:11741. [PMID: 34831498 PMCID: PMC8618243 DOI: 10.3390/ijerph182211741] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/25/2021] [Accepted: 10/25/2021] [Indexed: 01/14/2023]
Abstract
The genus Fusarium produces a number of mycotoxins of diverse chemical structures. Fusariotoxins are secondary metabolites produced by toxigenic fungi of the genus Fusarium. The important and commonly encountered fusariotoxins are trichothecenes, fumonisins, and zearalenone. Fusarium mycotoxins pose varying toxicities to humans and/or animals after consumption of contaminated grain. They can cause acute or chronic illness and, in some cases, death. For instance, a range of Fusarium mycotoxins can alter different intestinal defense mechanisms, such as the epithelial integrity, cell proliferation, mucus layer, immunoglobulins, and cytokine production. Of recent concern is the occurrence of emerging and masked Fusarium mycotoxins in agricultural commodities, which may contribute to toxic health effects, although the metabolic fate of masked mycotoxins still remains a matter of scientific discussion. These mycotoxins have attracted attention worldwide because of their impact on human and animal health, animal productivity, and the associated economic losses. In this paper, we review Fusarium mycotoxins and their metabolites with the aim of summarizing the baseline information on the types, occurrence, and health impacts of these mycotoxins in order to encourage much-needed research on integrated management of this unavoidable food contaminant as concerns for food safety continues to grow worldwide.
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Affiliation(s)
- Theodora I. Ekwomadu
- Department of Animal Health, Faculty of Natural and Agriculture, Sciences, Northwest University, Private Bag X2046, Mmabatho 2735, South Africa; (S.A.A.); (M.M.)
- Food Security and Food Safety Niche Area, Northwest University, Private Bag X2046, Mmabatho 2735, South Africa
| | - Stephen A. Akinola
- Department of Animal Health, Faculty of Natural and Agriculture, Sciences, Northwest University, Private Bag X2046, Mmabatho 2735, South Africa; (S.A.A.); (M.M.)
- Food Security and Food Safety Niche Area, Northwest University, Private Bag X2046, Mmabatho 2735, South Africa
| | - Mulunda Mwanza
- Department of Animal Health, Faculty of Natural and Agriculture, Sciences, Northwest University, Private Bag X2046, Mmabatho 2735, South Africa; (S.A.A.); (M.M.)
- Food Security and Food Safety Niche Area, Northwest University, Private Bag X2046, Mmabatho 2735, South Africa
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