AGXT and food allergy: Of 32 infants with positive SPT in 1999, 1 showed reactivity to peanut. In 2009, 72 infants had positive SPT, including 6 that reacted to peanut.In 1999, peanut was among the offending foods causing food allergy in infants (observed in 1 of 11 children with challenge-confirmed food allergy). In 2009, confirmed food allergy only included egg and cow ́s milk.