Table 1.

Important cross-reactivities that can lead to positive tests

Peanut	Cross-reactive with birch tree pollen. Ara h 8 is a Bet v 1 homologue [4].
Hazelnut	Cross-reactive with birch tree pollen. Cor a 1 is a Bet v 1 homologue [5].
Wheat	Cross-reactive with grass pollen and with other cereal grains (but low clinical relevance) [3]
Shellfish	Cross-reactive with dust mites and cockroach due to tropomyosin [21]
Soy	Cross-reactive with peanut and other legumes [21] and with birch tree pollen (Gly m 4 is a Bet v 1 homologue; Gly m 3 is a profilin)