Heavy metal toxicity is one of
the major current environment health problems and is potentially dangerous
because of bio-accumulation through the food chain (Aycicek et al., 2008) and
this can cause hazardous effects on livestock and human health (Aschner, 2002).
In general, the hazardous effects of these toxic elements depends upon the
dietary concentration of the element, absorption of the element by the system.
Homeostatic control of the body
for the element and also the species of the animal involved (Underwood, 1977). Heavy
metal pollution has become a serious health concern in recent years,
because of industrial and agricultural development.
Heavy metals of industrial
bio-waste contaminate drinking water, food and air. The toxic heavy metals of
great concern are Cd, Pb and Hg which are usually associated with harmful
effects in men and animals. It is recognized that heavy metals may exercise a
definite influence on the control of biological functions, affecting hormone
system and growth of different body tissues (Teresa et al., 1997).
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