Selecting allergenic extracts for inhalant allergy testing and immunotherapy.

The proper selection of allergen extracts is important in maintaining an efficient allergy practice. This article discusses pollen extract selection. The selection of tree, grass, and weed pollen extracts depends very much on where the clinician's practice is located. The floral zones of the continental United States are discussed, and several specific lists of pollen extracts are provided. Mold spore, dust, dust mite, and cat allergen selection are much less geography specific, yet they have their own complexity.