The researcher is keen to point out that this has nothing to do with the discredited idea that vaccination causes autism.
Children with autism appear to have a characteristic chemical signature in their urine which might form the basis of an early diagnostic test for the condition.
The finding also adds weight the hypothesis that substances released by gut bacteria are contributing to the onset of the condition.
More research is coming:
The next step is to confirm the results in a much larger group of age-matched children, as well as following high-risk children from birth in order to identify whether there are markers that precede the development of autistic symptoms.