Do Other Components of Bedding Dust Affect Sensitisation to House Dust Mites?

Table 2

Atopy patch test results.

	Diluted SPT HDM	Dust extract
No of positive reactions	6/29 (20.7%)	4/29 (13.8%)
Grade of reactions	Grade 1: 4/6	Grade 1: 3/4
	Grade 2: 1/6	Grade 2: 3/4
	Grade 4: 1/6
Average grade	1.7	1.25