This Spanish study evaluated 20 patients with occupational asthma caused by wheat flour inhalation (baker's asthma). Kiwi ingestion elicited oral allergy syndrome in 35% patients with baker's asthma.
Cross-reactivity in Pollen-Food Allergy Syndrome (PFAS) or Oral Allergy Syndrome (OAS) (click to enlarge the image).
Profilin is an actin-binding protein involved in the restructuring of the actin cytoskeleton. It is found in all eukaryotic organisms in most cells. Profilin may be a pan-allergen among plants that crossreacts between pollen, fruits, vegetables and latex.
Allergy to kiwi in patients with baker's asthma: identification of potential cross-reactive allergens. Palacin A, Quirce S, Sánchez-Monge R, Fernández-Nieto M, Varela J, Sastre J, Salcedo G. Ann Allergy Asthma Immunol. 2008 Aug;101(2):200-5.
Cross Reactions Among Foods (PDF).