Niigata Minamata disease: Difference between revisions

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{{Infobox medical condition
| name            = Niigata Minamata disease
| synonyms        = Methylmercury poisoning
| field          = [[Neurology]], [[Toxicology]]
| symptoms        = [[Ataxia]], [[numbness]] in the hands and feet, [[muscle weakness]], [[narrowing of the field of vision]], [[hearing impairment]], [[speech impairment]], [[tremors]], [[mental disturbances]]
| complications  = [[Cerebral palsy]], [[developmental delays]] in children exposed in utero
| onset          = Symptoms can appear weeks to months after exposure
| duration        = Chronic
| causes          = [[Methylmercury]] exposure
| risks          = Consumption of contaminated [[fish]] and [[shellfish]]
| diagnosis      = [[Clinical diagnosis]] based on symptoms and history of exposure, [[blood]] and [[urine]] tests for mercury levels
| differential    = [[Minamata disease]], [[Hunter-Russell syndrome]], other forms of [[mercury poisoning]]
| prevention      = Avoiding consumption of contaminated seafood, monitoring and regulation of industrial discharges
| treatment      = [[Chelation therapy]], [[supportive care]]
| prognosis      = Variable; some symptoms may be irreversible
| frequency      = Rare, localized to areas with industrial mercury pollution
| deaths          = Not specified
}}
'''Niigata Minamata disease''' is a neurological syndrome caused by severe mercury poisoning. It was first discovered in Niigata Prefecture, Japan, in 1965. The disease is named after Minamata Bay in Kumamoto Prefecture, where a similar outbreak occurred in 1956.
'''Niigata Minamata disease''' is a neurological syndrome caused by severe mercury poisoning. It was first discovered in Niigata Prefecture, Japan, in 1965. The disease is named after Minamata Bay in Kumamoto Prefecture, where a similar outbreak occurred in 1956.
== Symptoms ==
== Symptoms ==
The symptoms of Niigata Minamata disease include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the field of vision and damage to hearing and speech. In extreme cases, insanity, paralysis, coma and death follow within weeks of the onset of symptoms.
The symptoms of Niigata Minamata disease include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the field of vision and damage to hearing and speech. In extreme cases, insanity, paralysis, coma and death follow within weeks of the onset of symptoms.
== Cause ==
== Cause ==
The disease was caused by the release of methylmercury in the industrial wastewater from a factory. This highly toxic chemical bioaccumulated in shellfish and fish in Minamata Bay and the Shiranui Sea, which, when eaten by the local populace, resulted in mercury poisoning.
The disease was caused by the release of methylmercury in the industrial wastewater from a factory. This highly toxic chemical bioaccumulated in shellfish and fish in Minamata Bay and the Shiranui Sea, which, when eaten by the local populace, resulted in mercury poisoning.
== History ==
== History ==
The outbreak of Niigata Minamata disease and the resultant political and legal battles marked a turning point in Japanese society, leading to changes in the relationship between [[environmental pollution]] and public health, and to new laws and agencies dedicated to environmental issues.
The outbreak of Niigata Minamata disease and the resultant political and legal battles marked a turning point in Japanese society, leading to changes in the relationship between [[environmental pollution]] and public health, and to new laws and agencies dedicated to environmental issues.
== See also ==
== See also ==
* [[Minamata disease]]
* [[Minamata disease]]
* [[Mercury poisoning]]
* [[Mercury poisoning]]
* [[Environmental issues in Japan]]
* [[Environmental issues in Japan]]
== References ==
== References ==
<references />
<references />
[[Category:Neurological disorders]]
[[Category:Neurological disorders]]
[[Category:Health in Japan]]
[[Category:Health in Japan]]
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[[Category:Industrial disasters]]
[[Category:Industrial disasters]]
[[Category:History of Japan]]
[[Category:History of Japan]]
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Latest revision as of 23:41, 3 April 2025


Niigata Minamata disease
Synonyms Methylmercury poisoning
Pronounce N/A
Specialty N/A
Symptoms Ataxia, numbness in the hands and feet, muscle weakness, narrowing of the field of vision, hearing impairment, speech impairment, tremors, mental disturbances
Complications Cerebral palsy, developmental delays in children exposed in utero
Onset Symptoms can appear weeks to months after exposure
Duration Chronic
Types N/A
Causes Methylmercury exposure
Risks Consumption of contaminated fish and shellfish
Diagnosis Clinical diagnosis based on symptoms and history of exposure, blood and urine tests for mercury levels
Differential diagnosis Minamata disease, Hunter-Russell syndrome, other forms of mercury poisoning
Prevention Avoiding consumption of contaminated seafood, monitoring and regulation of industrial discharges
Treatment Chelation therapy, supportive care
Medication N/A
Prognosis Variable; some symptoms may be irreversible
Frequency Rare, localized to areas with industrial mercury pollution
Deaths Not specified


Niigata Minamata disease is a neurological syndrome caused by severe mercury poisoning. It was first discovered in Niigata Prefecture, Japan, in 1965. The disease is named after Minamata Bay in Kumamoto Prefecture, where a similar outbreak occurred in 1956.

Symptoms[edit]

The symptoms of Niigata Minamata disease include ataxia, numbness in the hands and feet, general muscle weakness, narrowing of the field of vision and damage to hearing and speech. In extreme cases, insanity, paralysis, coma and death follow within weeks of the onset of symptoms.

Cause[edit]

The disease was caused by the release of methylmercury in the industrial wastewater from a factory. This highly toxic chemical bioaccumulated in shellfish and fish in Minamata Bay and the Shiranui Sea, which, when eaten by the local populace, resulted in mercury poisoning.

History[edit]

The outbreak of Niigata Minamata disease and the resultant political and legal battles marked a turning point in Japanese society, leading to changes in the relationship between environmental pollution and public health, and to new laws and agencies dedicated to environmental issues.

See also[edit]

References[edit]

<references />

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