Abstract
BackgroundIgE-mediated cow's milk allergy (CMA) has been shown consistent in milder heated-milk tolerant and severe heated-milk reactant groups in patients older than two years. Little is known whether fermentation of milk gives rise to similar clinical phenotypes.We aimed to determine the influence of extensively heated and fermented cow's milk on the IgE-mediated and non-IgE-mediated CMA in children younger than two years. MethodsSubjects followed with the diagnosis of IgE-mediated and non-IgE-mediated CMA for at least six months underwent unheated milk challenge. IgE-mediated and non-IgE-mediated groups were categorised as unheated milk-reactive and tolerant, separately. Unheated milk-reactive groups were further challenged sequentially with fermented milk (yoghurt) and baked milk, 15 days apart. Allergy evaluation with skin tests, prick-to-prick tests and atopy patch tests were performed. ResultsFifty-seven children (median age: 14 months; range: 7–24 months) underwent unheated milk challenge. Eleven of 27 children with IgE-mediated CMA and 14 of 30 children with non-IgE-mediated CMA tolerated unheated milk. Among subjects who reacted to unheated milk; 15 of 16 subjects (93%) with IgE-mediated CMA also reacted to yoghurt, whereas 11 of 16 subjects (68%) with non-IgE-mediated CMA tolerated fermented milk. Thirteen subjects (81%) of the unheated milk-reactive IgE-mediated group tolerated to heated milk. None of 16 subjects of unheated milk-reactive non-IgE-mediated group reacted to baked milk. ConclusionThe majority of children under the age of two years with both IgE-mediated and non-IgE-mediated CMA tolerated baked-milk products. Yoghurt was tolerated in two thirds of unheated milk reactive patients suffering from non-IgE-mediated CMA.
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