Against the background of reported different trends of incidence and p
resentation of coeliac disease in Sweden and Finland, a joint study wa
s done to explore potential causes. The clinical study confirmed that
classical symptoms and diagnosis before 2 years of age dominated in Sw
eden. In Finland, the symptoms were more diffuse and diagnosis in most
cases was made after the age of 8 years. A significantly lower weight
score attained at diagnosis was seen in Swedish patients compared wit
h Finnish. No significant difference in HLA expression was found. Infa
nt feeding was investigated by studying food records of healthy infant
s. Swedish infants ingested three times more wheat protein at 9 months
and twice as much at 12 months compared with Finnish children. It is
concluded that the intake of infant cereal protein might influence whe
n and how clinical coeliac disease appears. The question whether or no
t it is important for if coeliac disease will be acquired still remain
s to be answered.