Monarch Disease Ontology entry MONDO_0017638 (manganese poisoning) is associated with chronic inhalation of manganese particles by individuals who work with manganese ore. Clinical features include confusion; hallucinations; and an extrapyramidal syndrome (Parkinson disease, secondary) that includes rigidity; dystonia; retropulsion; and tremor. (Adams, Principles of Neurology, 6th ed, p1213). Also known as: Manganism, manganese intoxication.