Damage to the liver and kidneys has been observed in rats chronically (long-term) exposed in their drinking water.

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Mercury exposure can cause permanent damage to the brain, kidneys and lungs but about 180 families live there.

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It would also slash the risk of so-called microvascular complications, such as damage to the eyes, nerves, and kidneys, by 12 percent, the researchers say.

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Experts believe this variant has acquired a deadly combination of producing a toxin which can damage the kidneys and being really good at sticking to the gut, allowing more bacteria to grow and ultimately produce even more toxin.

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