Fungos contaminantes e produtores de aflatoxinas em castanha do Pará (Bertholletia excelsa HUMB. &amp; BONPL 1808)

Castrillón, Aurélia Lopes; Purchio, Adhemar

doi:10.1590/1809-43921988183183

Cited by 14 publications

(7 citation statements)

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“…This result agrees with those of others authors (1,4,5,8,31), who also isolated aflatoxigenic Aspergillus from Brazil nuts.…”

Section: Discussionsupporting

confidence: 94%

“…In the present investigation, A. flavus, A. nomius, and A. parasiticus strains were isolated. Predominance of A. flavus in stored samples of Brazil nuts has also been reported (8,12,24). A. nomius and A. parasiticus were isolated from shells as early as sample 1 and from nuts in sample 4 and subsequent samples.…”

Section: Discussionmentioning

confidence: 71%

“…Contamination of Brazil nuts with strains of Aspergillus section Flavi or aflatoxins has been reported (5,8,14,25), and contamination with CPA and aflatoxins in this substrate has been suggested (5,32). Studies of the contamination of Brazil nuts with fungi and mycotoxins have mainly involved retail samples obtained from local markets (6), and data associated with describing and monitoring the production stages of Brazil nuts and mycotoxins are rare or outdated.…”

mentioning

confidence: 99%

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Monitoring and Determination of Fungi and Mycotoxins in Stored Brazil Nuts

Baquião

Oliveira

Reis

et al. 2013

Journal of Food Protection

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Brazil nut (Bertholletia excelsa) is an important commodity from the Brazilian Amazon, and approximately 37,000 tons (3.36 × 10⁷ kg) of Brazil nuts are harvested each year. However, substantial nut contamination by Aspergillus section Flavi occurs, with subsequent production of mycotoxins. In this context, the objective of the present investigation was to evaluate the presence of fungi and mycotoxins (aflatoxins and cyclopiazonic acid) in 110 stored samples of cultivated Brazil nut (55 samples of nuts and 55 samples of shells) collected monthly for 11 months in Itacoatiara, State of Amazonas, Brazil. The samples were inoculated in duplicate onto Aspergillus flavus and Aspergillus parasiticus agar and potato dextrose agar for the detection of fungi, and the presence of mycotoxins was determined by high-performance liquid chromatography. The most prevalent fungi in nuts and shells were Aspergillus spp., Fusarium spp., and Penicillium spp. A polyphasic approach was used for identification of Aspergillus species. Aflatoxins and cyclopiazonic acid were not detected in any of the samples analyzed. The low water activity of the substrate was a determinant factor for the presence of fungi and the absence of aflatoxin in Brazil nut samples. The high frequency of isolation of aflatoxigenic Aspergillus section Flavi strains, mainly A. flavus, and their persistence during storage increase the chances of aflatoxin production on these substrates and indicates the need for good management practices to prevent mycotoxin contamination in Brazil nuts.

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“…This result agrees with those of others authors (1,4,5,8,31), who also isolated aflatoxigenic Aspergillus from Brazil nuts.…”

Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 71%

mentioning

confidence: 99%

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Monitoring and Determination of Fungi and Mycotoxins in Stored Brazil Nuts

Baquião

Oliveira

Reis

et al. 2013

Journal of Food Protection

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“…This obviously exposed them to manual contact which may have facilitated their microbial contamination. It is well known that the hard shell can protect them from external invaders during storage and shipment (1,4).…”

mentioning

confidence: 99%

Bacterial and yeast counts in Brazilian commodities and spices

Freire

Offord

2002

Braz. J. Microbiol.

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A total of thirteen genera of bacteria and two genera of yeasts were detected in surface sterilized and unsterilized Brazilian commodities and spices such as cashew kernels, Brazil nut kernels, black and white pepper. The genus Bacillus with eight species was by far the most common. The yeasts isolated were Pichia sp., P. guillermondii and Rhodotorula sp. Bacillus cereus, Salmonella typhimurium and Staphylococcus aureus were detected in cashew and Brazil nut kernels.

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“…The greatest scientific efforts related to Brazil nuts are studied from the perspective of this product as an influence on human health (Gonzales and Salas. 2006;Berno et al, 2010;Colpo et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Damage caused by Tribolium castaneum (Coleoptera: Tenebrionidae) in Stored Brazil nut

et al. 2017

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Tribolium castaneum is an insect that occurs worldwide and it is a pest that attacks stored products, in particular, grains and seeds. The adult and immature forms are categorized as secondary pests which feed on grains or seeds previously damage in storage conditions. The objective of this study was to describe the type of damage caused by adults and immature of T. castaneum in Brazil nuts and identify the type of damage caused by Coleoptera. It was also verified whether the shell can protect the almond from the attack of this pest. The lesions inflicted by this insect starts as a scratched surface, which evolves into galleries and even injuries capable of modifying the original shape of the almond. Due to its capacity to promote considerable damage with consequent losses in the value of the nuts, T. castaneum may be listed among pests of Brazil nut categorized as primary pest by its ability to initiate injuries in the intact almond.

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Fungos contaminantes e produtores de aflatoxinas em castanha do Pará (Bertholletia excelsa HUMB. & BONPL 1808)

Abstract: RESUMOCem amoòthcu, de

Cited by 14 publications

References 1 publication

Monitoring and Determination of Fungi and Mycotoxins in Stored Brazil Nuts

Monitoring and Determination of Fungi and Mycotoxins in Stored Brazil Nuts

Bacterial and yeast counts in Brazilian commodities and spices

Damage caused by Tribolium castaneum (Coleoptera: Tenebrionidae) in Stored Brazil nut

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