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    Aflatoxin contamination in Tanzania: quantifying the problem in maize and groundnuts from rural households

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    Journal Article (401.4Kb)
    Date
    2021
    Author
    Boni, S.
    Beed, F.
    Kimanya, M.
    Koyano, E.
    Mponda, O.
    Mamiro, D.
    Kaoneka, B.
    Bandyopadhyay, R.
    Korie, S.
    Mahuku, G.
    Type
    Journal Article
    Review Status
    Peer Review
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Aflatoxins are toxic and carcinogenic secondary metabolites, produced by Aspergillus flavus and Aspergillus parasiticus, which contaminate food and feed and threaten human and animal health. To assess the prevalence of aflatoxins in Tanzania, 180 groundnut and 200 maize samples were collected from 9 and 10 districts, respectively. Aflatoxin contamination was quantified using high performance liquid chromatography. Aflatoxins were detected in samples collected from all districts and prevalence ranged from 92 to 100% for groundnuts and 10 to 80% for maize. The mean aflatoxin level for groundnuts was 6.37 μg/kg and the highly contaminated sample had 40.31 μg/kg. For maize, the mean aflatoxin level was 12.47 μg/kg and the highly contaminated sample had 162.40 μg/kg. The estimated average probable daily intake (APDI) of aflatoxin B1 (AFB1) from groundnuts consumption was 1.88 ng/kg body weight/day, while for maize, it ranged between 151.98-272.89 ng/kg body weight/day. The APDI for both groundnut and maize exceeded the provisional maximum tolerable daily intake (PMTDI) of AFB1 for adults (1 ng/kg body weight/day), bringing about health concerns for populations in Tanzania. Another alarming finding was that 75% of the farmers who provided samples for analysis were not aware of aflatoxins or the negative health impacts from consuming contaminated products. Results reported in this paper show that aflatoxin contaminated staple crops are widely distributed in Tanzania and that the risk of human exposure is high due to diet preferences. Awareness campaigns are required to inform and protect farmers and consumers.
    Acknowledgements
    The authors would like to thank TFDA for aflatoxin analysis, SUA, TPRI and MA in Tanzania for attending the stakeholders’ inception workshop and helping with the survey and sample collection; IITA as a host and all other participants in the stakeholders’ inception workshop including Civil Education is the Solution for Poverty and Environmental Management (CESOPE) – all Tanzanian and Ohio State University – international institutions. This study was jointly funded by the USAID’s Feed the Future ...
    https://dx.doi.org/10.3920/wmj2020.2646
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/7133
    IITA Authors ORCID
    Ranajit Bandyopadhyayhttps://orcid.org/0000-0003-2422-4298
    George Mahukuhttps://orcid.org/0000-0001-8444-8651
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3920/wmj2020.2646
    Research Themes
    Plant Production and Health
    IITA Subjects
    Aflatoxin; Agronomy; Disease Control; Food Security; Maize; Plant Breeding; Plant Diseases; Plant Production
    Agrovoc Terms
    Mycotoxins; Maize; Aflatoxins; Aspergillus Flavus; Tanzania; Grandnuts
    Regions
    Africa; East Africa
    Countries
    Tanzania
    Hubs
    Eastern Africa Hub; Headquarters and Western Africa Hub
    Journals
    World Mycotoxin Journal
    Collections
    • Journal and Journal Articles4839
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