german cockroach allergenic extract

German cockroach allergenic extract is a non-standardized biologic preparation derived from the German cockroach (Blattella germanica). It contains a mixture of proteins and allergens from the whole insect or its secretions and remains. The primary use is for allergy diagnosis via skin testing and for allergen-specific immunotherapy (hyposensitization) in patients with confirmed IgE-mediated sensitivity to German cockroach allergens. The mechanism of action involves exposure to specific allergens that trigger an immune response; diagnostic use relies on histamine release upon IgE cross-linking on mast cells, while therapeutic administration aims to induce immune tolerance by increasing IgG production and regulatory T cell activity, thereby reducing allergic symptoms over time. Extracts are typically administered percutaneously or intradermally for diagnosis, and subcutaneously for immunotherapy[2][3][8]. These extracts are not standardized in terms of potency or content but may be labeled by weight/volume. They are preserved in glycerin-containing solutions to maintain stability[5][6]. Indications include diagnostic testing and treatment of allergic disease when avoidance is not possible.

Other names

allergenic extract-german cockroachallergenic extract-cockroachgerman blatella germanica