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Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions

The production of yam-derived (Dioscorea rotundata) foodstuffs is mainly performed by small and medium scale processors that employ old traditional methods. This can lead to differences in quality from processor to processor, and from location to location, with consequent safety concerns. As such, t...

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Autores principales: Omohimi, Celestina, Piccirillo, Clara, Ferraro, Vincenza, Roriz, Mariana C., Omemu, Mobolaji A., Santos, Sandra M. Dias, Da Ressurreição, Sandrine, Abayomi, Louise, Adebowale, Abdulraqaz, Vasconcelos, Marta W., Obadina, Oluwasegun, Sanni, Lateef, Pintado, Maria M. E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6352045/
https://www.ncbi.nlm.nih.gov/pubmed/30609871
http://dx.doi.org/10.3390/foods8010012
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author Omohimi, Celestina
Piccirillo, Clara
Ferraro, Vincenza
Roriz, Mariana C.
Omemu, Mobolaji A.
Santos, Sandra M. Dias
Da Ressurreição, Sandrine
Abayomi, Louise
Adebowale, Abdulraqaz
Vasconcelos, Marta W.
Obadina, Oluwasegun
Sanni, Lateef
Pintado, Maria M. E.
author_facet Omohimi, Celestina
Piccirillo, Clara
Ferraro, Vincenza
Roriz, Mariana C.
Omemu, Mobolaji A.
Santos, Sandra M. Dias
Da Ressurreição, Sandrine
Abayomi, Louise
Adebowale, Abdulraqaz
Vasconcelos, Marta W.
Obadina, Oluwasegun
Sanni, Lateef
Pintado, Maria M. E.
author_sort Omohimi, Celestina
collection PubMed
description The production of yam-derived (Dioscorea rotundata) foodstuffs is mainly performed by small and medium scale processors that employ old traditional methods. This can lead to differences in quality from processor to processor, and from location to location, with consequent safety concerns. As such, the effects of processing and post-processing phases (i.e., storage, transport, etc.) on the safety of some yam-derived foodstuffs—namely chips, flakes, and flour—has been evaluated, with a focus on bacterial and fungal contamination, aflatoxins, pesticides, and heavy metals (Pb, Ni, Cd and Hg). Yams harvested and processed in Nigeria were screened, being that the country is the largest producer of the tuber, with 70–75% of the world production. Results highlighted no presence of pesticides, however, many samples showed high levels of bacterial and fungal contamination, together with heavy metal concentrations above the recommended safety levels. No trend was observed between the items considered; it was noticed, however, that samples purchased from the markets showed higher contamination levels than those freshly produced, especially regarding bacterial and aflatoxins presence. The processing stage was identified as the most critical, especially drying. Nonetheless, post-processing steps such as storage and handling at the point of sale also contributed for chemical contamination, such as aflatoxin and heavy metals. The results suggested that both the processing and post-processing phases have an impact on the safety of yam chips, flakes, and flour.
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spelling pubmed-63520452019-02-01 Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions Omohimi, Celestina Piccirillo, Clara Ferraro, Vincenza Roriz, Mariana C. Omemu, Mobolaji A. Santos, Sandra M. Dias Da Ressurreição, Sandrine Abayomi, Louise Adebowale, Abdulraqaz Vasconcelos, Marta W. Obadina, Oluwasegun Sanni, Lateef Pintado, Maria M. E. Foods Article The production of yam-derived (Dioscorea rotundata) foodstuffs is mainly performed by small and medium scale processors that employ old traditional methods. This can lead to differences in quality from processor to processor, and from location to location, with consequent safety concerns. As such, the effects of processing and post-processing phases (i.e., storage, transport, etc.) on the safety of some yam-derived foodstuffs—namely chips, flakes, and flour—has been evaluated, with a focus on bacterial and fungal contamination, aflatoxins, pesticides, and heavy metals (Pb, Ni, Cd and Hg). Yams harvested and processed in Nigeria were screened, being that the country is the largest producer of the tuber, with 70–75% of the world production. Results highlighted no presence of pesticides, however, many samples showed high levels of bacterial and fungal contamination, together with heavy metal concentrations above the recommended safety levels. No trend was observed between the items considered; it was noticed, however, that samples purchased from the markets showed higher contamination levels than those freshly produced, especially regarding bacterial and aflatoxins presence. The processing stage was identified as the most critical, especially drying. Nonetheless, post-processing steps such as storage and handling at the point of sale also contributed for chemical contamination, such as aflatoxin and heavy metals. The results suggested that both the processing and post-processing phases have an impact on the safety of yam chips, flakes, and flour. MDPI 2019-01-03 /pmc/articles/PMC6352045/ /pubmed/30609871 http://dx.doi.org/10.3390/foods8010012 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Omohimi, Celestina
Piccirillo, Clara
Ferraro, Vincenza
Roriz, Mariana C.
Omemu, Mobolaji A.
Santos, Sandra M. Dias
Da Ressurreição, Sandrine
Abayomi, Louise
Adebowale, Abdulraqaz
Vasconcelos, Marta W.
Obadina, Oluwasegun
Sanni, Lateef
Pintado, Maria M. E.
Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions
title Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions
title_full Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions
title_fullStr Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions
title_full_unstemmed Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions
title_short Safety of Yam-Derived (Dioscorea rotundata) Foodstuffs—Chips, Flakes and Flour: Effect of Processing and Post-Processing Conditions
title_sort safety of yam-derived (dioscorea rotundata) foodstuffs—chips, flakes and flour: effect of processing and post-processing conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6352045/
https://www.ncbi.nlm.nih.gov/pubmed/30609871
http://dx.doi.org/10.3390/foods8010012
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