Comparison of weight per volume and protein nitrogen units in non-standardized allergen extracts: implications for prescribing subcutaneous immunotherapy

Table 7 Recommended lowest weight per volume concentrations for birch, ragweed, dog and Alternaria, based on a PNU concentration of 3000 for both HollisterStier and Stallergenes Greer’s extracts

	Recommended weight per volume
	HollisterStier	Stallergenes Greer
Birch	1:150	1:200
Ragweed	1:800	1:600
Dog	1:100*	1:100
Alternaria	1:150	1:500

If concentrations were stronger than 1:100 weight per volume for a 3000 PNU/mL, then maximum weight per volume of 1:100 was recommended, as indicated by asterixis (*)

ISSN: 1710-1492