Table 1.

Allergen and endotoxin levels present in HDE. Indoor allergen levels were measured by ELISA following laboratory protocol. House dust extract samples were diluted serially from 1 : 10 to 1 : 10 000 for ELISAs. Dilutions falling within the linear portion of the standard curve were used to determine concentration. Total Bla g as reported here is the sum total of Bla g1 and 2; endotoxin was measured by LAL

HDE no.	Bla g 1 (µg/ml)	Bla g 2 (µg/ml)	Total Bla g (µg/ml)	Endotoxin (µg/ml)
1	15344	541	15890	2·07
2	6102	1000	7102	2·33
3	15340	6067	46007	1·76
4	39940	9622	49562	4·35
5	31780	7910	39690	5·99