
Am J Psychiatry 160:1691-1693, September 2003
© 2003 American Psychiatric Association
High Blood Monocyte Counts and Neopterin Levels in Children With Autistic Disorder
Thayne L. Sweeten, Ph.D.,
David J. Posey, M.D., and
Christopher J. McDougle, M.D.
OBJECTIVE: Leukocyte counts and plasma neopterin levels were determined in autistic children and matched healthy comparison subjects. METHOD: Blood from 31 autistic children and 28 age- and gender-matched healthy comparison subjects was analyzed for numbers of neutrophils, eosinophils, basophils, lymphocytes, monocytes, and total leukocytes and for plasma neopterin levels. RESULTS: The monocyte count and neopterin level were significantly higher in the autistic children than in the comparison subjects. CONCLUSIONS: These results suggest that the immune system may be activated in some children with autism.
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