Toxic element found in thermometers, batteries, fluorescent light bulbs, latex anti -fungal paints, and old disinfectants (mercurochrome) as well as fungicidal seed dressings which should not be fed as a consequence. One possible route for ingestion is via contaminated water, especially bore water. Mercury content of drinking water should be <0.003 mg/Liter.
All forms are potentially toxic with effects particularly on the brain and kidney. Acute poisoning will cause mouth inflammation, diarrhoea, shock, and rapid death. Organic mercurial poisoning develops more slowly over a week or more producing neurological symptoms such as depression, unsteady gait, partial paralysis, tremor, seizures, and death. Blood in the urine and faeces may feature. Treatment depends on severity and prognosis is guarded.