RESUMEN
Accordingly to numerous surveys food allergy affects up to 2-6% of population in different countries and varies due to numerous factors including the prevalence of helminths infestation. The food allergy prevalence data in Russia are based on official medical statistics. The study was performed as part of "The Prevalence, Cost and Basis of Food Allergy Across Europe" (EU funded project No FP6-2006-TTC-TU-5 Proposal 045879 EuroPrevall). The aim is to create the concept offood allergy in children in opisthorchiasis endemic area based on epidemiological study of the prevalence, risk factors and clinical features. The main objective of the study will be the working out of the food safety regulations. This article describes the study design and its methodology.