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Appl Environ Microbiol. 1984 March; 47(3): 478-480
Copyright © 1984, American Society for Microbiology. All Rights Reserved.

Correlation of Aflatoxin Contamination With Zinc Content of Chicken Feed {dagger}

Frank T. Jones, Winston M. Hagler Jr. and Pat B. Hamilton*

Department of Poultry Science, North Carolina State University, Raleigh, North Carolina 27695-7608

ABSTRACT

Feed samples from chicken houses in five commercial chicken operations were analyzed for Zn, Mn, Fe, Cu, Cd, and aflatoxin content. Mean aflatoxin content of these samples was 14 ppb (14 ng/g) as opposed to 1.2 ppb in samples taken when the feed was made. Aflatoxin content of the feed samples correlated (r = 0.325) significantly (P < 0.05) with Zn content but not with Mn, Fe, or Cu, all of which correlated significantly with Zn. Zn content of unamended feed (<20 ppm [20 µg/g]) is normally supplemented with a mineral premix containing Zn, Mn, Fe, and Cu to meet the nutrient requirements of chickens (40 ppm of Zn). The mean zinc concentration of the feed samples (117 ppm) was about threefold greater than the nutrient requirement and ranged from 58 to 162 ppm in individual samples. These field survey results parallel earlier reports of augmented production of aflatoxin in monocultures of aflatoxigenic fungi in corn and other ingredients supplemented with Zn. These results suggest that stricter control of Zn levels during manufacture could reduce aflatoxin contamination of feed consumed by chickens.

FOOTNOTES

* Corresponding author.

{dagger} Paper no. 8945 of the Journal Series of the North Carolina Agricultural Research Service, Raleigh, N.C. 27695-7608.

Appl Environ Microbiol. 1984 March; 47(3): 478-480
Copyright © 1984, American Society for Microbiology. All Rights Reserved.





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Copyright © 1984 by the American Society for Microbiology. All rights reserved.