Abstract
Information on the mycotoxin contamination of rice in Africa is limited although the risk of contamination is high. In this study, domestic milled rice processed by actors using suboptimal methods was purchased and total fumonisin (FUM), zearalenone, and aflatoxin concentrations determined at 0, 90, and 180 days after storage. Three different climatic locations, Cotonou (Benin) in the Guinea savanna, Yaoundé (Cameroon) in the Tropical forest, and N'diaye (Senegal) in the Sahel, were selected as storage sites. Subsets of the samples collected from Glazoue (Benin), Ndop (Cameroon), and Dagana (Senegal) were stored in plastic woven bags under room conditions in the respective sites with or without calcium oxide (burnt scallop shell-BSS, 0.1% w/w) treatment. Multivariance analysis showed that FUM concentration was positively influenced by the duration of storage only while zearalenone concentration was negatively influenced by relative humidity and head rice but positively by impurities. Zearalenone concentration was also influenced by sample collection/storage location, processing type, and duration of storage. Aflatoxin concentration was influenced negatively by storage room temperature and head rice but positively by impurities and chalky grains. In addition, aflatoxin concentration was influenced by collection/storage location and processing type. BSS treatment followed by storage for 6 months had no effect on the concentration of the three assessed mycotoxins. Strategies to reduce the risk of mycotoxin contamination in study sites will include the improvement of physical rice quality through better pre- and postharvest practices and proper packaging of both treated rice and untreated rice in hermetic systems before marketing and storage.
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Claims 7
Claim · model-written summary
Fumonisin concentration rose with storage duration.
- Taxon
- rice
Oryza sativat0 - Treatment
- duration of storagee0
- Outcome
- FUM concentratione0
- Direction
- positively influencede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“FUM concentration was positively influenced by the duration of storage only”
Claim · model-written summary
Zearalenone concentration decreased with relative humidity and head rice, and increased with impurities.
- Taxon
- riceOryza sativat0
- Outcome
- zearalenone concentratione0
- Direction
- negatively influencede0
- Qualifier
- positively by impuritiese0
- Comparator
- relative humidity and head ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“zearalenone concentration was negatively influenced by relative humidity and head rice but positively by impurities”
Claim · model-written summary
Zearalenone concentration varied with collection or storage location, processing type, and storage duration.
- Taxon
- riceOryza sativat0
- Treatment
- processing type, and duration of storagee0
- Outcome
- Zearalenone concentratione0
- Setting
- sample collection/storage locatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Zearalenone concentration was also influenced by sample collection/storage location, processing type, and duration of storage”
Claim · model-written summary
Aflatoxin concentration decreased with storage room temperature and head rice and increased with impurities and chalky grains.
- Taxon
- riceOryza sativat0
- Outcome
- Aflatoxin concentratione0
- Direction
- negativelye0
- Qualifier
- positively by impurities and chalky grainse0
- Setting
- storage roome0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Aflatoxin concentration was influenced negatively by storage room temperature and head rice but positively by impurities and chalky grains”
Claim · model-written summary
Aflatoxin concentration varied with collection or storage location and processing type.
- Taxon
- riceOryza sativat0
- Treatment
- processing typee0
- Outcome
- aflatoxin concentratione0
- Setting
- collection/storage locatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“aflatoxin concentration was influenced by collection/storage location and processing type”
Claim · model-written summary
Burnt scallop shell treatment followed by six months of storage did not change concentrations of the three mycotoxins.
- Taxon
- riceOryza sativat0
- Treatment
- BSS treatment followed by storage for 6 monthse0
- Outcome
- concentration of the three assessed mycotoxinse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“BSS treatment followed by storage for 6 months had no effect on the concentration of the three assessed mycotoxins”
Claim · model-written summary
The authors recommend improving rice physical quality and hermetic packaging to reduce mycotoxin risk.
- Taxon
- riceOryza sativat0
- Outcome
- improvement of physical rice quality through better pre- and postharvest practices and proper packaging of both treated rice and untreated rice in hermetic systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice”
e0“Strategies to reduce the risk of mycotoxin contamination in study sites will include the improvement of physical rice quality through better pre- and postharvest practices and proper packaging of both treated rice and untreated rice in hermetic systems before marketing and storage”
The same questions in other papers
storage · disease · Oryza sativa (rice)Positive and negative results
5 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
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See all 12 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.