Allergy to egg yolk possibly induced by sensitization to bird serum antigens

Hypersensitivity to ingested hen's egg yolk is described in a 65-year-old female patient. The patient's symptoms started in adult life and coincided with the acquisition of a parrot as a household pet. The bird's presence caused complaints of allergic rhinitis, while the ingestion of eggs caused urticaria and angioedema. Analysis of sequential blood serum samples revealed high levels of IgE antibodies to egg yolk and to various bird sera, but no precipitins. RAST-inhibition experiments indicated that the primary sensitization may have been to antigens from the parrot.     

Vineyard snail allergy possibly induced by sensitization to house-dust mite (Dermatophagoides pteronyssinus)

A female patient experienced a severe allergic reaction after consumption of vineyard snails. The patient proved to be sensitized to house-dust mite (HDM) and demonstrated a positive skin test and specific IgE to snail ( Eobania vermiculata , Lofarma). The snail RAST was > 80% inhibited by HDM, whereas the mite RAST was < 10% inhibited by snail extract. This is possibly another example of food allergy related to primary sensitization by an aeroallergen.