Fungal and mycotoxin assessment of dried edible mushroom in Nigeria

Ezekiel, Chibundu N.; Sulyok, Michael; Frisvad, Jens Christian; Somorin, Yinka; Warth, Benedikt; Houbraken, Jos; Samson, Robert A.; Krska, Rudolf; Odebode, A. C.

doi:10.1016/j.ijfoodmicro.2013.01.025

Cited by 43 publications

(31 citation statements)

References 20 publications

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“…It may be appropriate to suggest that susceptibility of both crops, especially sesame, to contamination by aflatoxigenic strains is low compared to other crops/foods (e.g. maize, nutmeg and mushrooms) from Nigeria that showed higher tox:atox proportions (Atehnkeng et al 2008; Ezekiel et al 2013a, 2013c). …”

Section: Resultsmentioning

confidence: 99%

Assessment of aflatoxigenicAspergillusand other fungi in millet and sesame from Plateau State, Nigeria

et al. 2014

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Sixteen fonio millet and 17 sesame samples were analysed for incidence of moulds, especially aflatoxigenic Aspergillus species, in order to determine the safety of both crops to consumers, and to correlate aflatoxin levels in the crops with levels produced by toxigenic isolates on laboratory medium. Diverse moulds including Alternaria, Aspergillus, Cercospora, Fusarium, Mucor, Penicillium, Rhizopus and Trichoderma were isolated. Aspergillus was predominantly present in both crops (46–48%), and amongst the potentially aflatoxigenic Aspergillus species, A. flavus recorded the highest incidence (68% in fonio millet; 86% in sesame kernels). All A. parvisclerotigenus isolates produced B and G aflatoxins in culture while B aflatoxins were produced by only 39% and 20% of A. flavus strains isolated from the fonio millet and sesame kernels, respectively. Aflatoxin concentrations in fonio millet correlated inversely (r = −0.55; p = 0.02) with aflatoxin levels produced by toxigenic isolates on laboratory medium, but no correlation was observed in the case of the sesame samples. Both crops, especially sesame, may not be suitable substrates for aflatoxin biosynthesis. This is the first report on A. parvisclerotigenus in sesame.

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Section: Resultsmentioning

confidence: 99%

Assessment of aflatoxigenicAspergillusand other fungi in millet and sesame from Plateau State, Nigeria

et al. 2014

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“…Accordingly, medicinal applications may differ not only between different countries, but also between different ethnic groups inhabiting the same country. Mushrooms belonging to species of Termitomyces, Pleurotus, Lentinus, Lenzites, Trametes, Ganoderma, Pycnoporus, Coriolopsis , and Calvatia have been reported to be used in folk medicine in Nigeria [48, 57, 58]. On the other hand, mushrooms of the species Termitomyces, Agaricus, Boletus, Pleurotus, Cantharellus, Macrolepiota, Ganoderma , and Geastrum have been reported in Tanzania [59, 60].…”

Section: Therapeutic Values and Ethnomycological Applicationsmentioning

confidence: 99%

Mushrooms and Truffles: Historical Biofactories for Complementary Medicine in Africa and in the Middle East

El‐Enshasy

Elsayed

Aziz

et al. 2013

Evidence-Based Complementary and Alternative Medicine

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The ethnopharmaceutical approach is important for the discovery and development of natural product research and requires a deep understanding not only of biometabolites discovery and profiling but also of cultural and social science. For millennia, epigeous macrofungi (mushrooms) and hypogeous macrofungi (truffles) were considered as precious food in many cultures based on their high nutritional value and characterized pleasant aroma. In African and Middle Eastern cultures, macrofungi have long history as high nutritional food and were widely applied in folk medicine. The purpose of this review is to summarize the available information related to the nutritional and medicinal value of African and Middle Eastern macrofungi and to highlight their application in complementary folk medicine in this part of the world.

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“…Therefore, fresh mushrooms have to be processed to extend their shelf life for off-season use, and drying is a widely used postharvest technology, which overcomes problems related to overproduction and short shelf-life (Walde, Velu, Jyothirmayi, & Math, 2006). However, during the drying process, microorganisms may secrete potentially toxic metabolites and contaminate mushrooms (Shephard, 2008;Ezekiel et al, 2013). In this sense, electronbeam irradiation proved its technological feasibility to be safely used in order to reduce food losses caused by deterioration (namely, by insect pest attack during storage) (Kim, Akram, Ahn, & Kwon, 2012).…”

Section: Introductionmentioning

confidence: 99%

Exquisite wild mushrooms as a source of dietary fiber: Analysis in electron-beam irradiated samples

Fernandes

Barreira

António

et al. 2015

LWT - Food Science and Technology

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In the present study, electron-beam irradiation was applied to dried samples of Boletus edulis and Macrolepiota procera to evaluate the effects on their fiber composition. Both species presented an important percentage of dietary fiber, soluble and insoluble in different ratios. These high fiber levels are an interesting feature, allowing considering mushrooms as an alternative source of dietary fibers in the highly competitive market of fiber-enriched food products. In B. edulis samples, insoluble fiber and total fiber amounts were significantly lower in samples irradiated with 10 kGy, but soluble fiber had no significant changes for any of the assayed doses, while total available carbohydrates were significantly lower in unirradiated samples. M. procera samples irradiated with 6 kGy presented less total fiber, insoluble fiber and carbohydrates, but the same dose allowed the highest contents in soluble dietary fiber. In general, the irradiated samples, especially for higher doses, gave some significant changes in the total available carbohydrates and dietary fibers content. Nevertheless, the resulting differences still allow considering these species as good natural fiber sources, maintaining their potential health effects, while promoting a clean way to disinfest and decontaminate these highly perishable products.

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Fungal and mycotoxin assessment of dried edible mushroom in Nigeria

Cited by 43 publications

References 20 publications

Assessment of aflatoxigenicAspergillusand other fungi in millet and sesame from Plateau State, Nigeria

Assessment of aflatoxigenicAspergillusand other fungi in millet and sesame from Plateau State, Nigeria

Mushrooms and Truffles: Historical Biofactories for Complementary Medicine in Africa and in the Middle East

Exquisite wild mushrooms as a source of dietary fiber: Analysis in electron-beam irradiated samples

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