The lysine requirement of undernourished children with intestinal parasite infestations was determined to be 42.8 mgkgd ( 95 % CI : 32.6 , 53.1 mgkgd ) , and after successful antiparasitic treatment it was determined to be 35.5 mgkgd ( 95 % CI : 25.5 , 45.5 mgkgd ) .