In 1970, only 1 child in 10,000 was diagnosed with autism. Today, according to the Centers for Disease Control, the number is 1 in 59. There are two camps in the autism world. One camp holds that ... autism is a genetic condition, something like Down syndrome. However, despite decades of intensive research, no "autism gene" or combination of autism genes has yet been discovered. The second camp argues that ... environmental triggers like pesticides, certain foods, allergens, vaccines, and even stress can trigger an immune reaction in the child's body which impacts the brain and can cause symptoms of autism. The environmental camp extends to researchers who seek a connection between pesticides and autism. Recently research published in the American Journal of Psychiatry found that maternal exposure to the pesticide DDT is associated with autism in her infant. A recent book in the camp of environmental causes for autism is J. B. Handley's controversial How to End the Autism Epidemic. In 2004, Handley's son was diagnosed with severe autism. He and his wife Lisa were told that their son would probably be institutionalized. When the Handleys asked if making changes in their son's diet would help, their doctor, a world famous autism expert, replied that this was merely a placebo for parents. Wanting to try every alternative for their son, the Handleys found Bay Area physician Dr. Lynne Mielke. The boy's symptoms improved significantly with dietary interventions.