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Factors affecting absorption of harmful substances from the digestive tract of poultry and their level in poultry products*

Published online by Cambridge University Press:  18 September 2007

C.A. Kan
C.A. Kan
Affiliation:
DLO-Spelderholt Centre for Poultry Research, Spelderholt 9, 7361 DA Beekbergen, The Netherlands
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Abstract

The presence of harmful substances such as organochlorine pesticides, heavy metals, radionuclides and mycotoxins in poultry feed is sometimes unavoidable. The reduction of absorption of fat-soluble organochlorine pesticides (e.g. DDT or dieldrin) and enhancement of elimination from the body is not easy to accomplish. The level of more volatile compounds (e.g. lindane) can be reduced by freeze drying of the product. Removal of the fat from the product will also decrease the level of these lipophilic compounds. The absorption of (heavy) metals from the intestine shows many interactions which sometimes may be used in practical situations to reduce intestinal absorption, toxicity and residue formation of a particular heavy metal. Reduction of levels in contaminated products has not been described. Adsorbents such as bentonite or zeolite reduce, to some extent, the absorption of radionuclides in poultry. Mycotoxin formation in feedstuffs should and can, sometimes, be prevented. Ammoniation of feedstuffs is a good method of reducing aflatoxin levels. Adsorbents such as hydrated sodium calcium aluminosilicate may also help to alleviate mycotoxin problems arising from the feed.

Keywords

Poultryharmful substancesresiduesorganochlorine pesticidesheavy metalsmycotoxinsradionuclides
Type
Research Article
Information
World's Poultry Science Journal , Volume 50 , Issue 1 , March 1994 , pp. 39 - 53
Copyright
Copyright © Cambridge University Press 1994

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