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White hickory

White hickory

White hickory Scientific Information
Type: Whole Allergen
Display Name: White hickory
Allergen code: t41
Family: Juglandaceae
Latin Name: Carya tomentosa (syn. C. alba)
Other Names: White Hickory, Mockernut hickory, Mockernut, Whiteheart hickory, Hognut, and Bullnut
WHO/ICD-11 code: XM6V15

Clinical Relevance

Other Topics

Hayfever from Pecan is often described, especially in areas where it is cultivated. Because of the close family and genus relationship between White hickory and Pecan, results of studies on the latter may be applicable to the former. The pollen of the other Hickories is also known to cause hayfever where the trees are abundant. Other species of Carya may be involved, e.g., the Shagbark (or Shellbark) hickory (C. ovata), Nutmeg hickory (C. myristicaeformis Nutt) and Pignut hickory (C. glabra). In a study of 371 allergy patients tested serologically for hypersensitivity to prevalent tree pollens in the area surrounding New York over the years 1993-2000, the highest prevalence of hypersensitivity was for Oak (34.3%), Birch (32.9%), and Maple (32.8%) tree pollens. Lower prevalences were observed for Beech (29.6%), Hickory (27.1%), Ash (26%), Elm (24.6%), and Poplar (20.6%) trees. In an earlier study in St. Louis, Missouri, USA, a population was skin-tested with pollen from 12 wind-pollinated tree species. Pollen extracts of Box elder, Willow and Hickory elicited the strongest allergic reactions; Oak, Birch, Sycamore, Black walnut and Poplar more-moderate reactions; while allergens from Cottonwood, Maple, Elm and White ash were less reactive. Sensitisation to the close genus member C. pecan has been demonstrated in Israel and Mexico.

References
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  2. Weber RW. Pecan. Ann Allergy Asthma Immunol 2004;93(3):A-6
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