Correlation of aflatoxin contamination with zinc content of chicken feed
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 significantly 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 ..mu..g/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 aflatoxing contamination of feed consumed by chickens.
- Research Organization:
- North Carolina State Univ., Raleigh
- OSTI ID:
- 6863368
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Vol. 47:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AFLATOXIN
CORRELATIONS
ANIMAL FEEDS
CHEMICAL ANALYSIS
CADMIUM
ECOLOGICAL CONCENTRATION
CHICKENS
CONTAMINATION
COPPER
IRON
MANGANESE
ZINC
ANIMALS
ANTIGENS
BIRDS
ELEMENTS
FOOD
FOWL
MATERIALS
METALS
TOXIC MATERIALS
TOXINS
TRANSITION ELEMENTS
VERTEBRATES
560305* - Chemicals Metabolism & Toxicology- Vertebrates- (-1987)