What is compositae allergy?

Compositae allergy refers to contact allergic reactions caused by a group of plants commonly known as compositae. Compositae is an alternative name for the official term, Asteraceae. The most important allergens in the compositae family are sesquiterpene lactones, which are present in the oleoresin fraction of leaf, stem, flower, and possibly in the pollen.

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Source: dermnetnz.org