Association between aflatoxin and aflatoxigenic fungi in Brazil nut (Bertholletia excelsa H.B.K.)

Pacheco, Ariane Mendonça; Lucas, Ana Cyra dos Santos; Parente, Rosana Cristina Pereira; Pacheco, Neuzimar

doi:10.1590/s0101-20612010000200007

Cited by 21 publications

(16 citation statements)

References 5 publications

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“…and Fusarium spp. in nuts confirms the results reported by Castrillon and Purchio (1988b) and Pacheco, Lucas, Parente, and Pacheco (2010), who found a high frequency of the same fungi in the Brazil nuts samples. The lack of isolation of A. flavus by , who analyzed Brazil nut samples derived from pods collected directly from the tree, might be attributed to the lack of contact between the substrate and soil.…”

Section: Discussionsupporting

confidence: 92%

Mycoflora and mycotoxins in field samples of Brazil nuts

et al. 2012

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a b s t r a c tFungal and mycotoxin contamination was investigated in field samples of nuts, shells and pods of the Brazil nut collected during different periods in Itacoatiara, State of Amazonas, Brazil: day 0, samples still on the tree; days 5, 10 and 15, samples in contact with soil for 5, 10 and 15 days, respectively. The most prevalent fungi were Aspergillus flavus in fruit pods and nuts and Fusarium spp. in shells. Penicillium spp. and A. flavus were isolated from soil, and Fusarium spp. and Penicillium spp. from air. Aflatoxins and cyclopiazonic acid were not detected in any of the samples analyzed. The high frequency of isolation of aflatoxigenic A. flavus strains from soil and Brazil nuts increases the chance of aflatoxin production in these substrates. These findings suggest a possible contamination before drying and indicate soil as the main source of fungal contamination of Brazil nuts.

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Section: Discussionsupporting

confidence: 92%

Mycoflora and mycotoxins in field samples of Brazil nuts

et al. 2012

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“…With regards to the variables' temperature and RH% of the Amazon region, short time storage should be applied (PACHECO et al, 2010).…”

Section: And Awmentioning

confidence: 99%

“…During Brazil nut processing, it is likely to occur loss of fatty acids and amino acids (SILVA; ASCHERI; SOUZA, 2010), but it is unclear if the binomial time/ temperature of the dehydration stages are significantly safe to prevent the production of aflatoxins (PACHECO et al, 2010).…”

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confidence: 99%

Brazil nut sorting for aflatoxin prevention: a comparison between automatic and manual shelling methods

Pacheco

Martins

2013

Food Sci. Technol

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“…These steps allow for the disposal of damaged nuts that do not conform to processing standards, greatly reducing the possibility of contamination of batches of the product. Pacheco et al (2010) reported that samples obtained after drying (i.e., collected at the end of the process) were not contaminated by aflatoxins. Other researchers have reported no detection of aflatoxins in shelled Brazil nuts (Souza and Menezes 2004;IoannouKakouri et al 1999).…”

Section: Aflatoxins In Brazil Nutsmentioning

confidence: 99%

Brazil nuts: determination of natural elements and aflatoxin

et al. 2012

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A study was carried out to evaluate the association of levels of radioactivity, selenium and aflatoxin in shelled Brazil nuts, which were classified in different sizes, for export. The selenium determinations were performed by inductively coupled plasma optical emission spectrometry (LOQ = 3.0 µg g -1 ), and aflatoxins were detected by Liquid chromatography-mass spectrometry (LOQ = 0.85 µg kg -1 ), recovery rates were between 92 and 100%. Radioactivity was measured by high-resolution gamma spectrometry. The selenium mean concentration was (22.7 ± 7.4) µg g Ra. There was no statistically significant association between the level of selenium and the activity of radionuclides, however, there was correlation between the radionuclides. Aflatoxins above the quantification limit were not found. Keywords: radioactivity; selenium; Bertholletia excelsa. Castanha do Brasil: determinação de elementos naturais e aflatoxinas resUMoUm estudo foi realizado para avaliar a associação dos níveis de radioatividade, selênio e aflatoxinas em castanha-do-Brasil descascada, que foram classificadas em diferentes tamanhos, para exportação. As determinações de selênio foram realizadas por espectrometria de emissão óptica com plasma indutivamente acoplado (LOQ=3,0 µg kg -1 ) e aflatoxinas foram detectadas por LC-MSMS (LOQ=0,85 µg kg -1 ), as taxas de recuperação ficaram entre 92 e 100%. A radioatividade foi medida por espectrometria gama de alta resolução. A concentração média de selênio foi de (22,7 ± 7,4) Ra. Não houve associação estatisticamente significativa entre o nível de selênio e a atividade de radionuclídeos, no entanto, houve correlação entre os radionuclídeos. Não foi encontrado aflatoxinas acima do limite de quantifcação. PAlAvrAs-chAve: radioatividade, selênio, bertholletia excelsa.

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Association between aflatoxin and aflatoxigenic fungi in Brazil nut (Bertholletia excelsa H.B.K.)

Cited by 21 publications

References 5 publications

Mycoflora and mycotoxins in field samples of Brazil nuts

Mycoflora and mycotoxins in field samples of Brazil nuts

Brazil nut sorting for aflatoxin prevention: a comparison between automatic and manual shelling methods

Brazil nuts: determination of natural elements and aflatoxin

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