Irva Hertz-Picciotto, a researcher at the University of California, Davis, is leading a study into what sparks autism disorders. More than $1 billion has been spent over the past decade searching for autism’s causes.By MIKE STOBBE
ATLANTA – More than $1 billion has been spent over the past decade researching autism. In some ways, the search for its causes looks like a long-running fishing expedition, with a focus on everything from genetics to the age of the father, the weight of the mother, and how close a child lives to a freeway.
That perception may soon change. Some in the field say they are seeing the beginning of a wave of scientific reports that should strengthen some theories, jettison others and perhaps even herald new drugs.
“I do think over the next three to five years we’ll be able to paint a much clearer picture of how genes and environmental factors combine” to cause autism, said Geraldine Dawson, a psychologist who is chief science officer for the advocacy group Autism Speaks.
The effort has been infused with new urgency by a recent federal report that found autism disorders are far more common than was previously understood, affecting 1 in 88 U.S. children. Better diagnosis is largely responsible for the new estimate, but health officials said there may actually be more cases of autism, too.