Lolium perenne subsp. multiflorum pollen

Lolium perenne subsp. multiflorum pollen is an allergenic extract derived from the pollen of Italian ryegrass (also known as annual ryegrass). It is primarily used as a diagnostic tool in clinical allergy practice to identify individuals with hypersensitivity to grass pollens. The extract is typically administered via skin prick or intradermal testing, where it induces a localized type I hypersensitivity reaction (wheal and flare) in sensitized patients. This reaction occurs when allergens in the extract cross-link allergen-specific Immunoglobulin E (IgE) antibodies bound to the surface of mast cells and basophils, triggering the release of histamine and other inflammatory mediators. Approved in the United States in 1965, it is classified as a biological product and may also be used as a component in allergen immunotherapy (desensitization) for patients with allergic rhinitis or asthma triggered by grass pollen.

Brand names

Italian Ryegrass Pollen Extract

Other names

Italian ryegrass pollenAnnual ryegrass pollenLolium multiflorum pollenLolium multiflorum pollen extract