Oral Allergysyndrome

Individuals with allergies to tree, grasses, weeds, and ragweed pollens may develop itching of the lips, tongue, and buccal mucosa after eating fruits (Enberg,

Table 2. Percent Allergenicity of Common Food Allergens

Total percent Percent

Protein protein allergenicity

Egg allergens

Total percent Percent

Protein protein allergenicity

Egg allergens

Ovalbumin

54

100

Milk allergens

B-Lactoglobin

9

72

Casein

80

56

a-Lactoglobin

4

14

Soybean allergens

B-Conglycinin (6 subunit)

18.5

75

Kuntiz trypsin inhibitor

2-4

25

B-Conglutinin(a subunit)

18.5

20

Soy lectin

1-2

10

Modified from Critical Reviews in Food Science and Nutrition, Metcalfe et al., 1996,36:S177.

Modified from Critical Reviews in Food Science and Nutrition, Metcalfe et al., 1996,36:S177.

1991). Systemic effects are not engendered because the fruit allergens are easily degraded in the stomach. Oral allergy occurs because aeropollens, rubber products, and food allergens share similar antigens. Birch pollen, apples, carrots, potatoes, celery, hazelnut, and kiwi fruit have similar or identical allergenic epitopes. Ragweed pollen shares common epitopes with melons, bananas, zucchini squash and cucumbers. Latex antigens cross-react with bananas, chestnuts, and avocados (Anderson, 1996).

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