Peach Allergy Test
Latin name: Prunus persica
Source material: Peel from fresh fruit
Peach is a food which may result in allergy symptoms in sensitised individuals.
Peach Allergy Test: Allergen Exposure
Peach is the fruit of the peach tree, which is a tall deciduous tree native to China and closely related to the almond, with which it shares a characteristic corrugated seed shell.
It was introduced to Persia and the Mediterranean region in early historical times, and is now cultivated across China, Japan, Iran, the Mediterranean region, the US, Canada, and Australia.
The peach fruit is roundish, with a single large seed encased in hard wood. Peach skin is velvety, downy, and can be red, pink, yellow, white or any combination. It is often flushed with red, and bruises easily.
The nectarine is a cultivar of peach that looks very similar, except that it has a smooth, shiny skin without fuzz. Nectarines can be white, yellow, clingstone, or freestone. Ordinary peach trees occasionally produce a few nectarines, and vice versa.
Peach is usually consumed fresh but may be canned, dried or pickled. Its classic uses are in pastries, but it also often features in chutneys and jams.
Peach Allergy Test: Allergen Description
Several peach allergens of major importance have been detected, including a lipid transfer protein, a profilin, and many larger proteins.
Peach Allergy Test: Potential Cross-Reactivity
A high level of cross-reactivity occurs among members of the Rosaceae family. Allergy to fruits and vegetables is often associated with pollen allergy, but the relationship between fruit and pollen allergens is not simple.
Cross-reactivity patterns observed differ between geographical areas and climates, depending on the differences in exposure to inhaled and ingested allergens.
For example, the association between birch tree pollen allergy and peach allergy in Northern Europe may be explained by the detection of a Bet v 1-related protein in peach, whereas in Southern Europe and other countries, cross-reactivity associated with peach is more likely to be associated with other fruits and vegetables containing lipid transfer proteins.
Pru p 3, a lipid transfer protein allergen, possibly along with other larger peach proteins, is involved in allergenic relations with other fruits from the family Rosaceae, particularly apricot, cherry, and plum.
It has been suggested that the primary sensitiser to LTP is the peach.
Peach Allergy Test: Clinical Experience
Peach is a well-documented and common cause of allergy in children and adults, resulting in oral allergy and systemic reactions such as urticaria, asthma and anaphylactic shock following the ingestion of the fresh or processed fruit. This is particularly the case in the Mediterranean area, where peach is regarded as a major allergen.
Peach allergy has 2 basic patterns: that of Central and Northern Europe, with OAS related to a primary sensitisation to birch pollen Bet v 1 and profilins; and that of Southern Europe, with mostly systemic symptoms, in many cases due to sensitisation to lipid transfer proteins.
Oral allergy to peach is often associated with pollen allergy.
The allergenicity of peach is retained in the dried fruit.
Allergic reactions to peach may occur to the hidden allergen in ice cream, or by indirect contact through kisses or utensils.
A 28-year-old woman factory worker experienced occupational asthma and occupational rhinitis as a result of inhalation while handling peach. She also developed urticaria from ingesting peach.
The lipid transfer protein from peach, Pru p 3, has also been isolated from peach tree leaves and can act as a respiratory allergen and cause occupational rhinoconjunctivitis and asthma