The etiopathogenesis of infantile autism is still unknown. Recently so
me authors have suggested that food peptides might be able to determin
e toxic effects at the level of the central nervous system by interact
ing with neurotransmitters. In fact a worsening of neurological sympto
ms has been reported in autistic patients after the consumption of mil
k and wheat. The aim of the present study has been to verify the effic
acy of a cow's milk free diet (or other foods which gave a positive re
sult after a skin test) in 36 autistic patients. We also looked for im
munological signs of food allergy in autistic patients on a free choic
e diet. We noticed a marked improvement in the behavioural symptoms of
patients after a period of 8 weeks on an elimination diet and we foun
d high Levels of IgA antigen specific antibodies for casein, lactalbum
in and beta-lactoglobulin and IgG and IgM for casein. The levels of th
ese antibodies were significantly higher than those of a control group
which consisted of 20 healthy children, Our results lead us to hypoth
esise a relationship between food allergy and infantile autism as has
already been suggested for other disturbances of the central nervous s
ystem.