Abstract
| Original language | English |
|---|---|
| Journal | International Journal of Food Microbiology |
| Volume | 266 |
| Pages (from-to) | 213-221 |
| Number of pages | 31 |
| ISSN | 0168-1605 |
| DOIs | |
| Publication status | Published - 2018 |
Cite this
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Occurrence of Aspergillus section Flavi and aflatoxins in Brazilian rice: From field to market. / Katsurayama, Aline M.; Martins, Ligia Manoel; Iamanaka, Beatriz T.; Fungaro, Maria Helena P.; da Silva, Josué J; Frisvad, Jens Christian; Pitt, John I.; Taniwaki, Marta H.
In: International Journal of Food Microbiology, Vol. 266, 2018, p. 213-221.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Occurrence of Aspergillus section Flavi and aflatoxins in Brazilian rice: From field to market
AU - Katsurayama, Aline M.
AU - Martins, Ligia Manoel
AU - Iamanaka, Beatriz T.
AU - Fungaro, Maria Helena P.
AU - da Silva, Josué J
AU - Frisvad, Jens Christian
AU - Pitt, John I.
AU - Taniwaki, Marta H.
PY - 2018
Y1 - 2018
N2 - The guarantee of the high quality of rice is of utmost importance because any toxic contaminant may affect consumer health, especially in countries such as Brazil where rice is part of the daily diet. A total of 187 rice samples, from field, processing and market from two different production systems, wetland from the state of Rio Grande do Sul, dryland, from the state of Maranhão and market samples from the state of São Paulo, were analyzed for fungi belonging to Aspergillus section Flavi and the presence of aflatoxins. Twenty-three soil samples from wetland and dryland were also analyzed. A total of 383 Aspergillus section Flavi strains were isolated from rice and soil samples. Using a polyphasic approach, with phenotypic (morphology and extrolite profiles) and molecular data (beta-tubulin gene sequences), five species were identified: A. flavus, A. caelatus, A. novoparasiticus, A. arachidicola and A. pseudocaelatus. This is the first report of these last three species from rice and rice plantation soil. Only seven (17%) of the A. flavus isolates produced type B aflatoxins, but 95% produced kojic acid and 69% cyclopiazonic acid. Less than 14% of the rice samples were contaminated with aflatoxins, but two of the market samples were well above the maximum tolerable limit (5 μg/kg), established by the Brazilian National Health Surveillance Agency.
AB - The guarantee of the high quality of rice is of utmost importance because any toxic contaminant may affect consumer health, especially in countries such as Brazil where rice is part of the daily diet. A total of 187 rice samples, from field, processing and market from two different production systems, wetland from the state of Rio Grande do Sul, dryland, from the state of Maranhão and market samples from the state of São Paulo, were analyzed for fungi belonging to Aspergillus section Flavi and the presence of aflatoxins. Twenty-three soil samples from wetland and dryland were also analyzed. A total of 383 Aspergillus section Flavi strains were isolated from rice and soil samples. Using a polyphasic approach, with phenotypic (morphology and extrolite profiles) and molecular data (beta-tubulin gene sequences), five species were identified: A. flavus, A. caelatus, A. novoparasiticus, A. arachidicola and A. pseudocaelatus. This is the first report of these last three species from rice and rice plantation soil. Only seven (17%) of the A. flavus isolates produced type B aflatoxins, but 95% produced kojic acid and 69% cyclopiazonic acid. Less than 14% of the rice samples were contaminated with aflatoxins, but two of the market samples were well above the maximum tolerable limit (5 μg/kg), established by the Brazilian National Health Surveillance Agency.
U2 - 10.1016/j.ijfoodmicro.2017.12.008
DO - 10.1016/j.ijfoodmicro.2017.12.008
M3 - Journal article
VL - 266
SP - 213
EP - 221
JO - International Journal of Food Microbiology
JF - International Journal of Food Microbiology
SN - 0168-1605
ER -