Chronic copper toxicity of ruminants

Copper toxicity in ruminants: air pollution as a possible cause.

Pathological findings and liver and kidney analyses confirmed that cattle had died of chronic copper poisoning on a farm in the north-eastern Transvaal. This is the first known published record of chronic copper intoxication of cattle in southern Africa. An epidemiological study revealed that a source of copper was air pollution which could have arisen from a nearby copper smelting unit. Buffal...

Copper Toxicity/Chronic Active Hepatitis

The trace mineral Copper (Cu) is incorporated into several enzymes which catalyze important reactions in the body. Cu is mainly stored in the liver, but is also found in the skeletal system (bone marrow) as well as in muscle, brain and spleen tissue. While unavailable dietary Cu is excreted in the feces, via bile, approximately 40-60% of dietary (ingested) Cu is absorbed into the blood by the m...

Iodine toxicity in ruminants

e inadequate intake of iodine is still a topical problem, because it contributes to a reduction in performance through the disturbed health of adult animals and their offspring. e necessity of iodine is frequently described in association with hypothyroidal state. In our work we want to assign the hidden risk of prolonged iodine feeding in ruminants. We discuss the possible sources of iodine ...

How dietary copper affects ruminants

Chronic toxicity of dietary copper to Daphnia magna.

There is a growing concern that dietborne metal toxicity might be important in aquatic ecosystems. However, the science behind this matter is insufficiently developed to explicitly and accurately account for this in metal regulation or risk assessment. We investigated the effects of a chronic exposure of Daphnia magna to an elevated level of Cu (3000 microg Cu/g dry wt) in their diet (the green...