Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/19262
Título: Occurrence of filamentous fungi and aflatoxins in poultry feedstuffs
Autor: Oliveira, José Augusto Almendros de
Corrêa, Benedito Renata Silva
Castrillón, Aurélia L.
Cortêz, Ana Cláudia Alves
Palavras-chave: Aflatoxin
Absidia
Animals Food
Aspergillus
Aspergillus Flavus
Cladosporium
Food Contamination
Fungus
Fusarium
Moisture
Mucor
Nonhuman
Penicillium
Poultry
Protein Determination
Protein Synthesis
Rhizopus
Absidia
Animalsia
Aspergillus Flavus
Cladosporium
Crysosporium
Fungi
Fusarium
Mucor
Penicillium
Rhizopus
Data do documento: 1998
Revista: Revista de Microbiologia
É parte de: Volume 29, Número 2, Pags. 138-142
Abstract: Sixty samples of poultry feedstuffs obtained from one manufactory and four farms located in Manaus, Amazonas State, Brazil, were studied for filamentous fungi and aflatoxin contamination. The following parameters were analyzed: fungal contamination, aflatoxigenic potential of Aspergillus flavus strains isolated, occurrence of aflatoxins and influence of abiotic factors (moisture content and water activity) on the mycoflora. The fungi were isolated on Sabouraud dextrose agar with chloramphenicol. Detection of aflatoxins was carried out by thin-layer chromatography (TLC). The genus Aspergillus was the most frequent (71.7%), followed by Rhizopus (28.3%), Absidia (26.7%), Penicillium (11.7%), Mucor (11.7%), Fusarium (10%), Cladosporium (1.7%), and Crysosporium (1.7%). Among the Aspergillus species, A. flavus was the most frequently isolated (53.3%). 44% of A. flavus strains were toxigenic and produced only Group B aflatoxins. The fungi were recovered from samples with moisture content and water activity ranging from 11.0% to 24.6% and from 0.91 to 0.61, respectively. The number of colony forming units of Aspergillus pergram (CFU/g) varied from 0.5 to 21.5 x 103. No aflatoxins were detected in the 60 samples analysed.
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