"Chromosome 11 was identified as one of the culprits Scientists have found new autism genes by scanning the largest collection of families with multiple cases of autism ever assembled."
This is one more indication that Autism Spectrum Disorders (ASD) are hereditery and not caused by mercury or bad prenatal vitamins or some such. It does not indicate anything about people in the spectrum being extra sensative to environmental factors such as mercury, etc.
Experience and research already indicates that those of us in the spectrum have extra sensativities to diet, chemicals, smells, etc. So, it seems likely that our condition could be exaserbated, while not caused, by external factors. By the same token it seems likely that bothersome symptoms could be controlled by elimination or supplements.