A wide range of chemical can elicit an eruptive, acute-onset cutaneous allergic inflammatory response which leads to wheal or erythema formation and consequential dermatitis.
These include plastic food bowls, industrial chemicals such as chromium metals, acids and alkalis, detergents, solvents, soaps, and petroleum byproducts, sap from certain weeds, trees, grasses (especially wandering jew (Tradescantia spp) and inch plant (Callisia fragrans)) and topical insecticidal collars, sprays, powders, foams, and shampoos.
Contact dermatitis may induce severe reactions in some dogs such as metaflumizone-amitraz incriminated in triggering secondary pemphigus foliaceus and some shampoos inducing superficial necrolytic dermatitis.
Contact dermatitis often occurs in glabrous skin regions such as the abdomen and less commonly the feet, chin, nose and genitals. Irritant contact dermatitis can occur after a single exposure or repeated exposure.
Clinical symptoms are usually confined to the skin and include hypersensitivity-induced pruritus with secondary moisture-associated dermatitis, intertrigo and pyoderma. In contact dermatitis associated with the feet, secondary pododermatitis is common.
The diagnosis of contact dermatitis is made by results of avoidance and/or provocation tests and/or patch tests.
Treatment is usually achieved by removal of dog from cause and treating with palliate topical glucocorticoids and antimicrobial if indicated.
- Pitbull chat
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