Life and dietary factors of incidence in immediate allergic response against foods in 18 months old infants

Using the method of questionnaires, we surveyed 2,114 infants aged 18 months old to know how life and dietary styles are related to incidence of immediate allergic response against foods. 12.0% in the surveyed children was found as having immediate allergic response against foods, and 91.5% of them omitted foods including hen's egg (73.2%), foods containing hen's egg (46.5%), cow's milk (31.6%), foods containing cow's milk (24.6%), and sea foods (15.8%). Life and dietary factors of incidence in immediate allergic response against foods was found in the surveyed infants who were first time nursing for their parents, or who was breast-feeding baby without any bottle-feeding. Early weaning before 4 months old was not found as a trigger of incidence of immediate allergic response against foods. These results suggested that some factors were present in life and dietary styles to cause immediate allergic response against foods in 18 months old infants