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Allergic contact dermatitis from grasses

D Koh1, C L Goh, H T Tan

  • 1Department of Community, Occupational and Family Medicine, National University of Singapore.

Contact Dermatitis
|July 1, 1997
PubMed
Summary
This summary is machine-generated.

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This study confirms allergic contact dermatitis from common grasses, developing a patch test for grass intolerance. 11% of patients with grass intolerance showed positive reactions, identifying specific allergenic grass species.

Area of Science:

  • Dermatology
  • Allergology
  • Environmental Health

Background:

  • Allergic contact dermatitis (ACD) is a prevalent skin condition.
  • Grass exposure is a common trigger for skin reactions, but specific allergens are not well-defined.
  • A need exists for reliable diagnostic tools to identify grass-induced ACD.

Observation:

  • Six common grass species were collected from lawns and military areas.
  • Solvent extracts (polar, non-polar, volatile) were prepared from these grasses.
  • Patch testing was conducted on 20 healthy controls and 46 patients with a history of grass intolerance.

Findings:

  • No control subjects exhibited positive patch test reactions.
  • Five out of 46 patients (11%) showed positive patch tests to specific grass species: Axonopus compressus, Ischaemum muticum, Imperata cylindrica, Panicum maximum, and Pennisetum purpureum.

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  • All positive reactions were associated with the non-polar fraction of the grass extracts.

    • Implications:

    • This research validates the existence of allergic contact dermatitis caused by common grass species.
    • A novel patch test series for screening grass intolerance has been developed.
    • Findings contribute to understanding plant-induced allergic skin conditions and inform clinical diagnosis.