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Africa RISING                       East and Southern Africa Research Review and               Planning Meeting, Arusha, T...
Mycotoxins - aflatoxin,                     Health & Trade•   Synergistic with Hepatitis B Virus (HBV)    to cause liver c...
Aflatoxin Facts• Highly toxic metabolite produced      • Some predisposing  by the ubiquitous Aspergillus           factor...
Prevalence of Aflatoxins in Food & Feed•   2.5 billion exposed worldwide•   Several African staple commodities affected•  ...
TanzaniaSurveys1> determineprevalence ofmycotoxins inmaize andcassava2> questionnairesfield, processing,storage methods3> ...
Surveyteams   MAFSC   TPRI&   IITA   SUA   TFDA
Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin...
Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin...
Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin...
Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin...
Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin...
Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin...
SummaryWorking partnerships and trust establishedSurvey and analytical methods optimisedAwareness raisedLinkages between m...
Thank you, Asante Sana!
Mycotoxin contamination in Tanzania: Quantifying the problem in maize and cassava in households and markets
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Mycotoxin contamination in Tanzania: Quantifying the problem in maize and cassava in households and markets

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Presented by Fen Beed (IITA) at the Africa RISING East and Southern Africa Research Review and Planning Meeting, Arusha, Tanzania, 1-5 October 2012

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Mycotoxin contamination in Tanzania: Quantifying the problem in maize and cassava in households and markets

  1. 1. Africa RISING East and Southern Africa Research Review and Planning Meeting, Arusha, Tanzania, 1-5 October 2012Mycotoxin contamination in Tanzania: Quantifyingthe problem in maize and cassava in households and markets Fen Beed (IITA)
  2. 2. Mycotoxins - aflatoxin, Health & Trade• Synergistic with Hepatitis B Virus (HBV) to cause liver cancer • 30 times more potent in HBV+ people • 5-60 times higher cancer risk• Impairs growth and development of children• Suppresses immune system• Impedes uptake and utilization of micronutrients in human systems• Animal productivity reduced – growth rate, embryo toxicity, feed efficiency, cancer, death……
  3. 3. Aflatoxin Facts• Highly toxic metabolite produced • Some predisposing by the ubiquitous Aspergillus factors: flavus fungus – pre-harvest high temp and• The fungus infects crops and drought stress produces the toxin in the field and in stores – wet conditions at harvest and• Fungus carried from field to store post-harvest periods• Contamination possible without visible signs of the fungus – insect damage
  4. 4. Prevalence of Aflatoxins in Food & Feed• 2.5 billion exposed worldwide• Several African staple commodities affected• High human exposure in Africa – mother to baby• Levels and frequency of occurrence high • >30% maize in stores with >20 ppb aflatoxin • ~90% stores are contaminated with Afla fungi • Up to 40% grain in households with aflatoxin• Concern for food and feed processors, government and emergency food reserve agencies• Highly toxic strains, conducive environmental conditions, traditional farming methods and improper grain drying and storage practices, unregulated markets
  5. 5. TanzaniaSurveys1> determineprevalence ofmycotoxins inmaize andcassava2> questionnairesfield, processing,storage methods3> increaseawareness4 > Link to PACA;collect isolatesfrom maize &groundnut forcharacterisation ofpotential biocontrolagents and AbtAssociates
  6. 6. Surveyteams MAFSC TPRI& IITA SUA TFDA
  7. 7. Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin and sent along with all cassavaTo IFA-TULLN for LC-MS/MS; state of the art detection capable ofquantifying more than 50 toxic metabolites in a single analysis
  8. 8. Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin and sent along with all cassavaTo IFA-TULLN for LC-MS/MS; state of the art detection capable ofquantifying more than 50 toxic metabolites in a single analysis
  9. 9. Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin and sent along with all cassavaTo IFA-TULLN for LC-MS/MS; state of the art detection capable ofquantifying more than 50 toxic metabolites in a single analysis
  10. 10. Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin and sent along with all cassavaTo IFA-TULLN for LC-MS/MS; state of the art detection capable ofquantifying more than 50 toxic metabolites in a single analysis
  11. 11. Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin and sent along with all cassavaTo IFA-TULLN for LC-MS/MS; state of the art detection capable ofquantifying more than 50 toxic metabolites in a single analysis
  12. 12. Sample analysesSamples milled, sub sampled, and for maize; pre-tested using serologicalmethods for afaltoxin and fumonisin and sent along with all cassavaTo IFA-TULLN for LC-MS/MS; state of the art detection capable ofquantifying more than 50 toxic metabolites in a single analysis
  13. 13. SummaryWorking partnerships and trust establishedSurvey and analytical methods optimisedAwareness raisedLinkages between mycotoxin prevalencewith region and farmer practices identifiedAreas for targeted intervention identified- suitable for scaling out to Africa Rising Action Sites
  14. 14. Thank you, Asante Sana!

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