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April 7, 2013

Lead poisoning toll revised to 1 in 38 young kids

NEW YORK — More than half a million U.S. children are now believed to have lead poisoning, roughly twice the previous high estimate, health officials reported Thursday.

The increase is the result of the government last year lowering the threshold for lead poisoning, so now more children are considered at risk.

Too much lead can harm developing brains and can mean a lower IQ. Lead poisoning used to be a much larger concern in the United States, but has declined significantly as lead was removed from paint and gasoline and other sources.

The new number translates to about 1 in 38 young children. That estimate suggests a need for more testing and preventive measures, some experts said, but budget cuts last year eliminated federal grant funding for such programs.

Those cuts represent “an abandonment of children,” said David Rosner, a Columbia University public health historian who writes books about lead poisoning.

“We’ve been acting like the problem was solved and this was a thing of the past,” he added.

Lead can harm a child’s brain, kidneys and other organs. High levels in the blood can cause coma, convulsions and death. Lower levels can reduce intelligence, impair hearing and behavior and cause other problems.

Most cases of lead poisoning are handled by tracking and removing the lead source, and monitoring the children to make sure lead levels stay down. A special treatment to remove lead and other heavy metals is used only for extremely high levels.

Often, children who get lead poisoning live in old homes that are dilapidated or under renovation. They pick up paint chips or dust and put it in their mouth. Other sources include soil contaminated by old leaded gasoline, dust from industrial worksites and tainted drinking water

Lead has been banned in household paint since 1978 and was gone from gasoline by the late 1980s.

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