Allergy to goat's or sheep's milk without allergy to cow's milk.

Allergy to goat's or sheep's milk without allergy to cow's milk. Allergy to milk proteins from goats and sheep has been recently reported an d is an unusual finding. We report three cases of patients who experienced severe allergic reactions after eating cheeses made with goat's or sheep's milk and who tolerated cow's milk dairy products. Skin-prick tests with fre sh goat and sheep milks and/or specific IgE against goat and sheep milks we re strongly positive. Structural homology between goat and sheep caseins ma y be involved in the occurrence of allergy to goat's and sheep's milk witho ut allergy to cow's milk. (C) 2001 Editions scientifiques et medicales Else vier SAS.