Incidência de ocratoxina A em diferentes frações do café (Coffea arabica L.): bóia, mistura e varrição após secagem em terreiros de terra, asfalto e cimento

A incidencia de ocratoxina A foi estudada em cafe mistura, boia e varricao secas em tres tipos de terreiro: terra, cimento e asfalto. Foram analisadas 238 amostras coletadas em 11 municipios da regiao sul do Estado de Minas Gerais, sendo 35 boia, 97 - mistura e 106 varricao. Das amostras analisadas, em 40% nao foi detectada a presenca de ocratoxina A, em 31%, foram detectadas a presenca de ocratoxina A em niveis que variaram de 0,1 a 5,0 µg/Kg de cafe. Estes resultados demonstram que 169 amostras (71%) analisadas estariam dentro dos limites em estudo da Legislacao Europeia que regulamenta a concentracao maxima de ocratoxina A em graos de cafe torrado. As especies de Aspergillus identificadas como produtoras de ocratoxina A foram Aspergillus ochraceus, A. sclerotiorum e A. sulphureus. Os niveis de contaminacao de ocratoxina A em graos de cafe foram maiores na fracao varricao e nas fracoes boia e mistura, secas em terreiro de terra. Os resultados deste estudo concluem que o terreiro de terra aumenta o risco de contaminacao com ocratoxina A em graos de cafe. A fracao varricao devido aos riscos de exposicao a ocratoxina A, deve ser reduzida atraves da adocao de boas praticas agricolas e nao ser utilizada para fins de consumo humano e animal.

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