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    Enumeration of the microbiota and microbial metabolites in processed cassava products from Madagascar and Tanzania

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    S19ArtAbassEnumerationInthomDev.pdf (428.9Kb)
    Date
    2019-05
    Author
    Abass, A.
    Adegoke, G.O.
    Awoyale, W.
    Gaspar, A.
    Mlingi, N.
    Andrianavalona, V.
    Sulyok, M.
    Mneney, A.
    Ranaivoson, L.R.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
    Show full item record
    Abstract/Description
    Cassava processing practices vary among communities and countries with implications for food safety. The study examined the microbiota and microbial metabolite profiles of 126 samples of sun-dried cassava products: grits, improved chips, improved flour, kivunde, and makopa from Tanzania, and mangahazo maina from Madagascar. All samples were free of Salmonella spp. Only 12.5% makopa, 6.7% of mechanically processed flour, and 25% of chips conformed to yeast/mold regulatory limits (103 cfu/g). Among the most agriculturally important mycotoxins, aflatoxins (B1, B2, G1, and M1) were detected in 6.3–11.9%, fumonisins (B1, B2 and B3) in 3.2–41.3%, and zearalenone in 41.3% of the samples. A few samples of improved chips, improved flour, and makopa contained high aflatoxin B1 content. Some emerging mycotoxins: emodin, beauvericin, moniliformin, sterigmatocystin, alternariol methyl ether, nivalenol, mycophenolic acid, enniatin B, and enniatin B1 were detected. The most prevalent microbial metabolites were emodin (75.4%), tryptophol (67.5%), equisetin (61.9%), and beauvericin (51.6%), at mean concentrations of 8.8 μg/kg, 794.1 μg/kg, 277.2 μg/kg, and 29.5 μg/kg, respectively. Emodin and Beauvericin are the only emerging mycotoxins in this group and the mean concentrations are the lowest. Nevertheless, regular surveillance along the cassava food chain is recommended for early detection of emerging mycotoxins to prevent health problems associated with ingestion of unexpected toxins in foods.
    https://dx.doi.org/10.1016/j.foodcont.2018.12.025
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5198
    Non-IITA Authors ORCID
    Adebayo Abasshttps://orcid.org/0000-0003-1376-3608
    Wasiu Awoyalehttps://orcid.org/0000-0002-3635-1414
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.1016/j.foodcont.2018.12.025
    Research Themes
    SOCIAL SCIENCE & AGRIBUSINESS
    IITA Subjects
    Agribusiness
    Agrovoc Terms
    Cassava; Sun Drying; Microbial; Metabolites; Regulatory; Standards
    Regions
    Africa; East Africa; Southern Africa
    Countries
    Madagascar; Tanzania
    Journals
    Food Control
    Collections
    • Journal and Journal Articles4835
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