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A Research Note: Mycoflora and Aflatoxin-Producing Strains in Animal Mixed Feeds

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The mycoflora of 69 samples of animal mixed feeds were studied. Fungal counts ranged from 102 to 108 CFU/g, the lowest counts corresponding to the samples of rabbit feeds. Seventy-one fungal species belonging to 26 genera were identified. The predominant species were Aspergillus flavus, Fusarium moniliforme, andPenicillium chrysogenum. Thirty-six strains ofA. flavus and one strain of A. parasiticus were screened for aflatoxin production in yeast extract-sucrose medium. The final pH, weight of mycelium, and production of aflatoxins were determined after 14 days of incubation. Five strains (13.5%) were aflatoxigenic. No statistical differences were observed in mycelial dry weights and final pH between aflatoxin-producing strains and nonaflatoxigenic strains.

Document Type: Research Article

Affiliations: Dpto. Patología y Producción Animales (Microbiología), Facultad de Veterinaria, Universidad Autónoma de Barcelona, 08193 Bellaterra, Barcelona, Spain

Publication date: March 1, 1994

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