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Related Experiment Videos

Sensitivity to wild vegetation.

J Menz, R K Winkelmann

    Contact Dermatitis
    |March 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Allergic contact dermatitis from wild plants has shifted, with dog fennel and cocklebur now more common triggers than ragweed. This study examines the changing patterns of plant sensitivity in patients.

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    Area of Science:

    • Dermatology
    • Botany
    • Allergology

    Background:

    • Allergic contact dermatitis (ACD) to wild vegetation is a significant clinical concern.
    • Historical data from the 1950s identified ragweed (Ambrosia artemisiifolia) as a primary sensitizer.
    • Current epidemiological data on plant-induced ACD requires updated investigation.

    Purpose of the Study:

    • To identify the most frequent plant allergens causing ACD in contemporary patients.
    • To compare current plant sensitivities with historical data, noting shifts in prevalence.
    • To investigate the reasons behind observed changes in incidence and clinical presentation of plant-induced ACD.

    Main Methods:

    • Patch testing was performed on 74 patients with suspected wild vegetation allergy.

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  • Patients were tested with extracts from 13 plants of the Compositae family and 7 other weeds/trees.
  • Results were analyzed to determine the frequency of positive reactions to specific plant species.

    • Main Results:

    • Anthemis cotula (dog fennel) and Xanthium strumarium (cocklebur) were identified as the most frequent causes of positive patch tests.
    • A significant shift in the frequency of sensitivity was observed compared to the 1950s.
    • Ambrosia artemisiifolia (ragweed), previously the most common sensitizer, showed a decreased frequency in this study.

    Conclusions:

    • The etiological agents responsible for allergic contact dermatitis from wild vegetation have changed over time.
    • Anthemis cotula and Xanthium strumarium are now major contributors to plant-induced ACD.
    • Further research is warranted to understand the ecological and clinical factors driving these epidemiological shifts.