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

Table 1

Skin prick test results.

	Positive control	Negative control	SPT HDM solution	Diluted SPT HDM	Dust extract	SPT cat	SPT grass
Positive reactions	100%	0%	100%	93.1% (27/29)	96.5% (28/29)	65.5% (19/29)	51.7% (15/29)
Wheal diameter mm (95% CI)	5.1 (4.6–5.5)	0	8.1 (6.9–9.3)	5.3 (4.4–6.2)	5.1 (4.3–5.8)	6.7 (5.1–8.3)	4.0 (3.5–4.5)