By Gary M. White, MD
Paederus dermatitis is an irritant contact dermatitis caused by the Paederus beetle. The beetle releases a paederin-containing fluid that can cause irritation and blistering.
- Many states in the US harbor the blister beetle. It is also found in Central America and the West Indies.
A very itchy, vesicopustular eruption develops in skin that has come in contact with the beetle. Specifically, the rash starts to develop about 24 hours after contact. Erythema, pruritus, and at times burning, is present. Later, vesicopustules develop. Finally a scab forms with desquamation and possibly postinflammatory hyperpigmentation. In severe widespread cases, there can be fever, arthralgia, and vomiting.
Topical steroids are usually given.
Dermatol. Argent., 2015, 21(1): 56-58
Indian J Dermatol. 2013 Sep; 58(5): 410
J Clin Aesthet Dermatol. 2011 Nov; 4(11): 44–46
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