Grassy Narrows and Whitedog First Nations In the late 1960s, people in the Grassy Narrows and Whitedog First Nations populations started to suffer symptoms of mercury poisoning. Several Japanese doctors who had been involved in studying<unk>  disease in Japan travelled to Canada to investigate the mercury poisoning in these people. Blood mercury levels were above 100 ppb in a significant number of individuals and above 200 ppb in several others. Symptoms included sensory disturbances, such as narrowing of the visual field, and impaired hearing, abnormal eye movements, tremor, ataxia (impaired balance), and dysarthria (poor articulation of speech). Health effects continued to be felt, even in young people, in the 21st century. Dumping of drums of mercury which continue to leak is suspected, and field work by Brian Branfireun and others continues to monitor the health of the ecosystem.
Ontario Minamata disease
Pogosta disease
Zenker's degeneration
Degos disease
Bahima disease
Borna disease
Camisa disease
Tornwaldt's disease