Material

Concentration

Raw

Heated

Prick

Scratch

Prick

Scratch

Wheal (mm×mm)

Wheal (mm)

Wheal (mm×mm)

Wheal (mm)

Histamine dihydrochloride

10mg/ml

7×7

NT

NT

NT

Physiological saline

as is

1×1

0

NT

NT

Lemon

Pulp

as is

1×1

3

5×5

NT

Peel

as is

1×1

2

2×2

4

Orange

Pulp

as is

4×4

NT

1×1

4

Peel

as is

2×2

2

1×1

1

Grapefruit

Pulp

as is

1×1

0

3×2

0

Peel

as is

1×1

0

5×4

NT