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Updated: Aug 14, 2025

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma
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Canine dermatitis on contacting grass leaf: A case series.

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A novel canine pruritic dermatitis, resembling human protein contact dermatitis, is described. Affected dogs showed immediate skin reactions after grass contact, resolving with avoidance, suggesting a distinct diagnosis from atopic dermatitis.

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Area of Science:

  • Veterinary Dermatology
  • Canine Health
  • Allergy Research

Background:

  • Pruritic dermatitis is a common, often frustrating, clinical sign in dogs.
  • Contact dermatitis is frequently overlooked, even with localized skin lesions.
  • This study investigates an immediate skin reaction in dogs following exposure to grass, similar to human protein contact dermatitis.

Approach:

  • Retrospective analysis of 18 pet dogs in Australia with unresolved pruritic dermatitis.
  • Evaluation of clinical records focusing on dogs with dermatitis after grass leaf contact.
  • Assessment of skin testing, isolation, challenge, and lesion descriptions.

Key Points:

  • Dermatitis affected ventral chest, thighs, and limbs, correlating with grass contact areas.
  • Characteristic lesions included erythema, macules, papules, leading to hair loss and skin thickening.
  • Complete resolution of signs occurred upon grass avoidance, with rapid pruritus return upon re-exposure.

Conclusions:

  • The described canine dermatitis closely resembles human protein contact dermatitis.
  • This condition is clinically distinct from canine atopic dermatitis and other contact dermatitides.
  • Diagnosis and treatment differ from common pruritic skin disorders, with avoidance offering a potential cure.