An essential trace element, a component of several enzymes.

[affected.gif] Animals most affected
Sheep, cattle (especially juveniles).

[etiology.gif] Etiology
Ingestion of hay contaminated by molybdenum from industrial sources (iron foundries, steel works).
Note: deficiency of copper in soils and in vegetation increases the toxicity of molybdenum which can then prove toxic at levels which are normally considered to be safe.

[toxic.gif] Toxicity
Toxic oral doses are variable and related to the levels of copper in the diet (in ppm/DM):

Copper Molybdenum  
8-12 >6 will result in poisoning
<8 >2 will result in poisoning
10-20 20-50 poisoning does not occur

[clinical.gif] Clinical features



Death occurs within a few days to several weeks.

[lesions.gif] Lesions

[treatm~1.gif] Treatment
Antidotes: to increase the amount of copper in the diet (care should be taken with sheep as they are extremely sensitive to copper and risk copper poisoning):

[labinv~1.gif] Laboratory investigations