Fungal contamination and determination of fumonisins and aflatoxins in commercial feeds intended for ornamental birds in Rio de Janeiro, Brazil.

QUEIROZ B, ; PEREYRA CM, ; KELLER KM, ; ALMEIDA T,; CAVAGLIERI LR, ; MAGNOLI CE,; ROSA CA DA ROCHA

LETTERS IN APPLIED MICROBIOLOGY

WILEY-BLACKWELL PUBLISHING, INC

Año: 2013 vol. 57 p. 405 - 411

0266-8254

The purposes of this study were, to determine the distribution of total mycobiota, to determine the occurrence of Aspergillus spp., Penicillium spp. and Fusarium spp., and to detect and quantify fumonisin B1 and aflatoxin B1 in birds? feedstuffs. Sixty samples from different commercial feeds were collected. Analysis of the total mycobiota was performed and total fungal counts were expressed as CFU g-1. The isolation frequency (%) and relative density (%) of fungal genera and species were determined. Mycotoxins determination was done using commercial ELISA kits. The 48% of Standard, 31% of Premium and only 9% of Super Premium feed samples were found above of recommended limit (1 x 104 CFU g-1). Aspergillus (82%), Cladosporium (50%) and Penicillium (42%) were the most frequently isolated genera. Aspergillus niger aggregate (35%), A. fumigatus (28%) and A. flavus (18%) had the highest relative densities. Contamination with fumonisin B1 was detected in 95% of total samples with levels from 0.92 to 6.68 µg g-1, and the aflatoxin B1 contamination was found in 40% of total samples with levels between 1.2 and 9.02 µg kg-1. Feed samples contaminated with fumonisin B1 and aflatoxin B1 are potentially toxic to birds.