HEALTH REPORT - Study Finds Autism Increase in California

（单词翻译）

HEALTH REPORT – November 6, 2002: Study Finds Autism Increase in California

By Jeri Watson

This is the VOA Special English Health Report.

Autism is a mysterious and complex brain disorder¹ that begins to affect a child during the first three years of life.

Children sometimes develop normally² for a year or more. Then they become unable to develop normal
relationships with other people. They do not act normally in everyday life. They stop speaking. They repeat
meaningless actions.

Some autistic children express violent anger or injure themselves. New drugs appear to help control aggressive
actions in severely³ autistic children. However, autism cannot be cured.

No one knows what causes autism. Some scientists suspect that genetic⁴ influences or injuries during birth may be
linked to the disorder.

A new study by American scientists in California has failed to explain a major increase in autism in the state.
California lawmakers ordered the study after learning⁵ of an increase of almost three-hundred percent in severe
cases of autism. The California Department of Developmental Services said this increase took place between
nineteen-eighty-seven and nineteen-ninety-eight. The department also said the number of autistic children
continued to increase after that period.

Robert Byrd of the University of California at Davis led the study. His team gathered information about almost
seven-hundred children in the state. One group of children was from seven to nine years of age. The other
children were seventeen to nineteen years old. More than half of the children suffered from severe autism. The
others were mentally retarded⁶. They had very low levels of intelligence. The researchers said the information
about the children did not explain the increase in autism cases.

Before the study, some experts blamed the increase in cases on better recognition⁷ of the disorder. Others said the
number of cases was incorrectly reported. Doctor Byrd said a general increase in the state’s population caused
about ten percent of the increase in cases.

Doctors say that autistic children should receive intensive⁸ training while they are young. The experts suggest
repeated training in performing small jobs. They say such training can help an autistic child develop more
normally and lead a better quality of life.

This VOA Special English Health Report was written by Jerilyn Watson.

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