ENVIRONMENTAL HEALTH DEPARTMENTMINI. ENFERMEDAD DE MINAMATA Síndrome causado por envenenamiento por mercurio. ENVENENAMIENTO POR MERCURIO PRODUCCIÓN. Company Logo () Enfermedad de Minamata Resumen En , en la ciudad de Minamata (Japón), comenzaron a aparecer personas.

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Four Big Pollution Diseases of Japan. Please help improve this section by adding citations to reliable sources. On October 21,Chisso was ordered by the Ministry of International Trade and Industry to switch back its wastewater drainage from the Minamata River to Hyakken Harbour and to speed up the installation of wastewater treatment systems at the factory.

The company did not reveal these significant results to the investigators and ordered Hosokawa dd stop his research. This resulted in many applicants being rejected by the committee, ennfermedad them confused and frustrated. Some people feared the disease to be contagious, and many local people were fiercely loyal to Chisso, depending on the company for their livelihoods. To some patients, this ostracism by the community represented a greater fear than the disease itself.

The symptoms of the children closely mirrored those of adult Minamata disease patients, but many of their mothers did not exhibit symptoms. The deception was successful and almost all parties involved in Minamata disease were duped into believing that the factory’s wastewater had been made safe from December onward. Inthe victims of Minamata disease were in a much weaker position than the fishermen. Large quantities of mercury were detected in fish, shellfish, and sludge from the bay.

The prefectural governments did not publish the results and did nothing in response to these surveys. A memorial service was held at the Minamata Disease Municipal Museum on 1 May to mark 50 years since the official discovery of the disease. Scientists are testing natural products against methylmercury induced toxicity.


To qualify for compensation under the agreement, patients had to be officially recognised by various ad hoc certification committees according to their symptoms.

The Kumamoto branch, in particular, was especially helpful to the case. During the investigation by researchers at Kumamoto Universitythe causal substance had been identified as a heavy metal and it was widely presumed that the Chisso enfermrdad was the source of the contamination.

In fact, much activity on the part of the patients and fishermen took place during this period, but nothing had a significant impact on the actions of the company or the coverage of Minamata engermedad the national media.

As a group, these diseases came to be known as the four big pollution diseases of Japan.

Minamata disease – Wikidata

The litigation group and their lawyers were helped substantially by an informal national network of citizens’ groups that had sprung up around the country in On May 1, the hospital director reported to the local public health office the discovery of an ” epidemic of an unknown disease of the central nervous system “, marking the official discovery of Minamata disease.

Harvard University Asia Center. The causative agent is methylmercury. The polluting factory owned by Showa Denko employed a chemical process using a mercury catalyst very similar to that used by Chisso in Minamata. The enfsrmedad heard from patients and their families, but the most important testimony came from Chisso executives and employees.

Timeline of Minamata disease. Minamata disease remains an important issue in contemporary Japanese society. The hand of Tomoko Uemuraa Minamata disease victim.

His testimony was enfermexad up by a colleague who also told how company officials had ordered them to halt their cat experiments in the autumn of Three main legal points had to be overcome to enfermedar the case. As in Minamata, from the autumn of to the spring ofcats living along the banks of the Agano River had been seen to go mad and die.


File:Minamata map illustrating Chisso factory effluent routes2.png

This fact, combined with the lack of other industry, meant that Chisso had great influence in Minamata. The Chisso Corporation first opened a chemical factory in Minamata in In general, these symptoms deteriorated and were followed by severe convulsions, comaand eventually death. Minamata disease broke out again inthis time along the banks of the Agano River in Niigata Prefecture. They petitioned the committee, together with patients and supporters of the litigation group, for a fairer deal.

It was posed by Smith with the co-operation of Ryoko and Tomoko to dramatically illustrate the consequences of the disease. Fisheries were damaged in terms of reduced catches, and in response, Chisso reached two separate compensation agreements with the fishery cooperative in and Chisso’s Illegal Acts[32] published in Augustformed the basis of the ultimately successful lawsuit. The critical target of this compound is central nervous system. A more complete picture of the symptoms exhibited by patients was gradually uncovered.

This highly toxic chemical bioaccumulated in shellfish and fish in Minamata Bay and the Shiranui Seawhich, when eaten by the local populationresulted in mercury poisoning.

The physicians were puzzled by her symptoms: The verdict handed down on 20 March represented a complete victory for the patients of the litigation group:.

The issue of quantifying the impact of Minamata disease is complicated, as a full epidemiological study has never been conducted and patients were recognised only if they voluntarily applied to a certification council to seek financial compensation.

Patients who were certified by a Ministry of Health and Welfare committee would be compensated: