Mycoflora, fumonisins and aflatoxins in corn meal and flour traded in São Paulo, Brazil (2003)
- Authors:
- USP affiliated authors: CORREA, BENEDITO - ICB ; OLIVEIRA, CARLOS AUGUSTO FERNANDES DE - FZEA
- Unidades: ICB; FZEA
- Assunto: MICROBIOLOGIA
- Language: Inglês
- Abstract: In the present study, 30 samples of corn meal and 30 of corn flour traded in São Paulo were analysed for the presence of toxigenic fungi, aflatoxins and fumonisins B1 (FB1) and B2 (FB2). Isolation and quantification of the mycoflora were achieved on pour plates using Dichloran Glycerol 18% agar. Determination of aflatoxins B1, B2, G1 and G2 was performed by thin layer chromatography. Analysis of FB1 and FB2 was achieved by high performance liquid chromatography. The most prevalent genera isolated from corn meal and flour were Aspergillus, Penicillium and Fusarium. In corn meal, the following species from the Aspergillus genus isolated were: A. flavus (14.7%), A. alutaceus (2.3%), A. niger (2.0%) and A. chrysellus (1.4%). In relation to the Fusarium genus the species Fusarium moniliforme was isolated in 65.8% of the samples. Among the Aspergillus genus found in corn flour, the species were A. flavus (58.4%), A. niger (2.45%) and A. alutaceus (1.9%). As for the Fusarium genus, the species F. moniliforme was isolated in 62.4% of the samples. No aflatoxin was found in samples of both products. In corn meal, the concentrations of FB1 and FB2 ranged from 1.0815.29 mg kg-1 (mean: 5.17 mg kg-1) and 0.233.94 mg kg-1 (mean: 1.00 mg kg-1), respectively. Corn flour presented lower levels of FB1 (0.477.20 mg kg-1; mean: 2.11 mg kg-1) and FB2 (0.121.76 mg kg-1; mean: 0.67 mg kg-1). The higher contamination of corn meal with fumonisins may represent a risk for human health inBrazil. Results indicate the need for the adoption of practices to control the occurrence of fumonisins by manufacturers of corn products, mainly in corn meal
- Imprenta:
- Publisher: Sociedade Brasileira de Microbiologia
- Date published: 2003
- Conference titles: Congresso Brasileiro de microbiologia
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ABNT
BITTENCOURT, A. B. F. et al. Mycoflora, fumonisins and aflatoxins in corn meal and flour traded in São Paulo, Brazil. 2003, Anais.. [S.l.]: Sociedade Brasileira de Microbiologia, 2003. . Acesso em: 12 out. 2024. -
APA
Bittencourt, A. B. F., Corrêa, B., Oliveira, C. A. F. de, & Dilkin, P. (2003). Mycoflora, fumonisins and aflatoxins in corn meal and flour traded in São Paulo, Brazil. In . Sociedade Brasileira de Microbiologia. -
NLM
Bittencourt ABF, Corrêa B, Oliveira CAF de, Dilkin P. Mycoflora, fumonisins and aflatoxins in corn meal and flour traded in São Paulo, Brazil. 2003 ;[citado 2024 out. 12 ] -
Vancouver
Bittencourt ABF, Corrêa B, Oliveira CAF de, Dilkin P. Mycoflora, fumonisins and aflatoxins in corn meal and flour traded in São Paulo, Brazil. 2003 ;[citado 2024 out. 12 ] - The transmission of aflatoxin residues in the eggs of laying japanese quails
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