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Dimethylnitrosamine (DMNA)

This poison was seen when herring was preserved with sodium nitrate. Heating to produce herring meal resulted in formation of DMNA. This highly toxic poison causes severe liver damage. Animals lose appetite and have abundant fluid in the abdomen. Post mortem shows severe liver degeneration. Sodium nitrate is no longer used to preserve fish so this poisoning should not be seen.

Fox Diseases. Novia Scotia Dept. of Agriculture and Marketing Livestock Service.