Itai-itai Disease - Environment Notes

Itai-itai disease was initially identified in Japan in the 1960s and is caused by exposure to cadmium (Cd), which is a result of mining activities associated with industrialization. Osteomalacia with severe bone pain is a defining feature of Itai-Itai illness, which is also linked to kidney dysfunction. Itai-itai Disease is also referred to as an ouch ouch disease. This article will explain to you Itai-itai Disease which will be helpful in preparing the Environment Syllabus for the UPSC Civil Service exam.

Table of Contents

Cadmium (Cd) Pollution
Itai-itai Disease - History
Itai-itai Disease - Causes
Itai-itai Disease - Symptoms
Itai-itai - Treatment
Itai Itai Disease - Effects
Conclusion
FAQs
MCQs

Cadmium (Cd) Pollution

What is Cadmium (Cd) Pollution?

The metal cadmium has relatively low melting and boiling temperatures and no recognized biological use.
According to estimates, anthropogenic production of Cd in the environment has increased during the previous 30 years by about 70%.
Cd naturally occurs in close association with zinc, lead-zinc, and lead-copper-zinc ores.
Long-distance transmission of cadmium compounds is possible when they are linked with respirable-sized airborne particles.
It falls from the sky or rains down onto the ground below.
Once on the ground, cadmium is easily transported through the soil layers and ingested by plants like leafy vegetables, root crops, cereals, and grains, where it enters the food chain.
Additionally, cadmium is present in meat, particularly sweetmeats like liver and kidney.
In some regions, cadmium levels in shellfish and mushrooms are higher. Water is another way for cadmium to get into the food chain.

Cadmium Pollution

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History

Itai-itai Disease - History

The Kamioka Mines in Toyama, Japan became one of the top mines in the world as a result of increased productivity brought on by increasing demand for raw materials during the Russo-Japanese War and World War I as well as new mining methods from Europe.
Even more, production was produced before to World War II. The disease initially occurred around 1912, and mining operations produced considerable amounts of cadmium starting in 1910 and continued through 1945.
Cadmium was discarded as waste into the Jinz River until 1948 because it had no industrial value, exacerbating the element's release into the waterbody.
In an effort to find the disease's origin, medical research got underway in the 1940s and 1950s.
At first, lead poisoning was thought to be the cause because of the lead mining upstream.
Dr. Hagino and his colleagues first suspected cadmium as the cause of the disease in 1955.

Causes

Itai-itai Disease - Causes

Toyama Prefecture in Japan's mining-related cadmium poisoning was the root cause of the Itai-itai sickness.
Prior to World War II, mining was expanded to meet wartime demand by Mitsui Mining & Smelting Co., Ltd. As a result, the Jinz River and its tributaries became more polluted.
The river was primarily used for rice field irrigation, and also used for drinking water, washing, fishing, and other purposes by downstream populations.
When the locals complained about the pollution, Mitsui Mining & Smelting Co. built a basin to store the mining waste water before it was discharged into the river. This was ineffective, and many people had already become ill.
The causes of the poisoning were unknown until 1946, when it was assumed to be a regional disease or a type of bacterial infection.
Recent animal experiments have demonstrated that not all of the symptoms of itai-itai sickness can be brought on by cadmium toxicity.
According to these investigations, cadmium damage to kidney cell mitochondria is a major contributing component to the illness.

Symptoms

Itai-itai Disease - Symptoms

Weak and brittle bones are one of cadmium poisoning's principal side effects.
Due to the cadmium-induced bone abnormalities, back and leg pain are frequently experienced, and a waddling gait frequently develops.
As the bone deteriorates, the discomfort finally becomes incapacitating, increasing the likelihood of fractures.
Anemia, kidney failure and coughing are among more consequences that might result in mortality.
There has been a discernible increase in prevalence in postmenopausal older women.

A Patient With Itai-Itai Disease

Treatment

Itai-itai - Treatment

Any person who has Cd-Poisoning should seek emergency medical attention.
Cadmium (Cd) can be detoxified using EDTA (Ethylene Diamine TetraAcetate) and other chelators.
The chelators EDTA, DMPS, DMSA, and British Anti-Lewisite (BAL) are all available in clinical settings.
BAL is less frequently employed in medicine than its derivatives, DMPS, and DMSA because it is more poisonous.
Since EDTA has a long history of safe use and is FDA-approved for the treatment of lead and other heavy metals, clinical use is where it is most frequently recognized.
When used in accordance with established protocols, the use of such chelators has been recognized as therapeutically advantageous for both people and animals.

Chelating Agents Chemical substances are known as chelating agents interact with metal ions to create a stable, water-soluble complex. They are also referred to as chelators, sequestering agents, or chelants. Chelating drugs have a central ring-shaped structure that creates two or more bonds with the metal ion, allowing for excretion. Ethylenediamine is an illustration of a straightforward chelating agent.

Effects

Itai Itai Disease - Effects

Marine Life

Cadmium, which was released as industrial waste, began to accumulate in the soil, algae, and river organisms over time.
As a result, the local phytoplankton and algal species absorbed a large amount of it.
Cadmium was then passed down the food chain to fish consumers. Cadmium was also bioaccumulated in fish via passive transport in the gills.
Cadmium harmed fish by disrupting their endocrine systems, inhibiting reproduction, and sometimes killing them.
Because the residents were unaware of the cadmium and its dangers, they used the Jinz water to irrigate their rice fields.
Cadmium is highly water-soluble, and the rice paddies' prolonged exposure resulted in contaminated and toxic rice.
The consumption of this rice and drinking water by local residents resulted in elevated cadmium body burdens, which led directly to symptoms of itai-itai disease.
Cadmium is now regarded as one of the most dangerous toxic metals due to its ability to endanger food safety by being easily absorbed into rice paddies and, ultimately, rice.

Human Life

The permissible lifetime cadmium intake (LCD) levels for humans were found to be 1.7 to 2.1 g in studies to estimate the amount of cadmium exposure required to develop Itai-Itai disease.
LCD levels were estimated to be at 2.6 g when Itai-Itai disease was first identified in only 5% of the affected population.
Cadmium accumulates primarily in the liver and kidneys but has a greater impact on the kidneys. The severe symptoms of Itai-itai disease are caused by prolonged cadmium exposure.
Cadmium enters the kidneys by binding to the metallothionein in the blood and traveling to the kidney's glomerulus.
When cadmium enters the tubular cells of the kidneys, it is released and accumulates in the renal cortex until toxic levels are reached.
When cadmium levels in the renal cortex reach dangerous levels, it can deactivate metal-dependent enzymes or activate calmodulin, which regulates smooth muscle contraction by sensing calcium levels.
Once the kidneys have been severely damaged, those affected begin to experience musculoskeletal damage as a result of the disruption of calcium homeostasis.
This musculoskeletal damage is what causes the itai-itai disease's bone pain and deformities.

Conclusion

Itai-itai disease is one of Japan's Four Big Pollution Diseases. Numerous agricultural areas had been contaminated by cadmium pollution. In response to the widespread effects of heavy metal pollution in Japan, the Prevention of Soil Contamination in Agricultural Land Law of 1970 was passed. It commanded that planting ceases in locations where the soil contained 1 ppm of cadmium or more contamination in order to implement soil restoration. Continuous screening and long-term monitoring of renal tubular function and bone metabolism are critical for residents of the Jinzu River basin, both to clarify the natural history of chronic environmental Cd exposure and to allow for early diagnosis and mitigation of the effects.

Other Relevant Links
Environment Notes	International Conventions
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FAQs

Question: What is Itai-Itai disease and what causes it?

Answer: Itai-Itai disease is a painful and debilitating condition that emerged in Japan during the mid-20th century, primarily affecting individuals exposed to cadmium pollution. The disease is characterized by severe joint pain, osteomalacia (softening of bones), and renal dysfunction, leading to severe physical disability. Cadmium, a heavy metal found in contaminated water and rice, accumulates in the body over time, resulting in significant health issues. The name "Itai-Itai" translates to "ouch-ouch," reflecting the intense pain experienced by those affected.

Question: How did the Itai-Itai disease come to public attention?

Answer: The Itai-Itai disease gained public attention in the 1950s when a significant number of cases were reported in the Toyama Prefecture of Japan, particularly among individuals living near the Jinzu River. Investigations revealed a direct correlation between the consumption of rice contaminated with cadmium from industrial waste and the onset of the disease. As more cases were identified, including fatalities, public outcry and scientific scrutiny increased, prompting governmental and environmental agencies to take action against the industrial pollution responsible for the health crisis.

Question: What measures have been taken to address Itai-Itai disease and cadmium pollution?

Answer: In response to the Itai-Itai disease outbreak, the Japanese government implemented several measures to combat cadmium pollution. These included stricter regulations on industrial waste disposal, monitoring of water quality, and restoration of contaminated lands. Additionally, the government provided medical treatment and financial compensation to affected individuals and families. Public health campaigns aimed at raising awareness about the dangers of cadmium exposure and promoting safe agricultural practices were also established, contributing to efforts to prevent further occurrences of the disease.

Question: What are the long-term health effects of Itai-Itai disease?

Answer: Long-term health effects of Itai-Itai disease can be severe and debilitating. Survivors often experience chronic pain, mobility issues, and bone deformities due to the extensive damage caused by cadmium accumulation. Kidney damage is also common, leading to complications such as chronic kidney disease and increased risk of cardiovascular diseases. The psychological impact, including anxiety and depression related to the disease and its consequences, can significantly affect the quality of life for affected individuals. Rehabilitation and ongoing medical care are essential for managing these long-term effects.

Question: What lessons can be learned from the Itai-Itai disease case in terms of environmental health?

Answer: The Itai-Itai disease case serves as a critical lesson in the importance of environmental health and the need for stringent regulations on industrial waste management. It highlights the potential consequences of neglecting environmental pollution, particularly the impact of heavy metals on human health. The incident underscores the necessity for regular monitoring of food and water safety, public education about environmental hazards, and proactive governmental policies to protect vulnerable communities from similar health crises in the future.

MCQs

1. What is the primary cause of Itai-Itai disease?

A) Mercury exposure
B) Lead poisoning
C) Cadmium contamination
D) Arsenic exposure