by contrast , during disturbance of house dust , a significantly larger proportion of dust mite , antigen p1 ( 80.6 +/- 11.8 % ; p less than 0.001 ) was collected on the first stage of the impactor , and in keeping with the apparent size of these particles ( diameter greater than 10 microns ) , very little of this allergen ( less than 4 % ) was still airborne when sampled 15 to 35 minutes after disturbance .
C0003320
antigen
C0002092
allergen