A trace element. Zinc salts
are used in skin lotions, eye washes, in treatments and preventatives for footrot
in sheep and in products for treating facial eczema in sheep and cattle. Available
in combination with maneb as an agricultural fungicide.
Animals most affected
Dogs, (cattle, sheep).
Ingestion of fragments of zinc metal or of soluble zinc salts (e.g. zinc chlorate,
sulphate or acetate). Industrial contamination of water or forage. Cases of zinc
poisoning are most uncommon.
In general, zinc salts are of very low toxicity and extremely large quantities need
to be ingested to cause toxic effects:
2230 ppm in the diet
50-500 ppm in drinkmg water
Clinical features Acute or sub-acute poisoning
vomiting, diarrhoea, colic;
anorexia, weakness, malaise, depression;
occasional haemolytic jaundice with anaemia.
Extremely uncommon and difficult to identify or to prove:
anorexia, haemolytic anaemia.
Interference with the uptake and metabolism of iron and copper.
hepatic and renal degeneration;
jaundice (mild or fulminant);
petechiae and bloody suffusions on the intestinal mucosae, kidneys and heart.