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Contributor

Maya Vedamurthy, MD

Diagnosis

dermatitis, contact irritant paederus beetle dermatitis

Body Site

arm

Age

20 years

Pigmentation

medium

Organization

linear

Color

red purple

Morphology

vesiculobullous (blister, pustule)

Pattern

asymmetric

Comments

This irritant contact dermatitis results from pederin which is found primnarily in adult female paederus beetles. The chemical is deposited on the skin when the beetles are handled and crushed by the unsuspecting victim. Pederin is a vesicant with a biochemical structure very different from cantharidin which is made by blister beetles.

Description

linear yellow vesicles, violaceous erosions and crusts on a bright red base

Categories

environmental injury bites and stings

Image Added

11/5/2006 14:46:29

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Other Resources

PubMed Medline Plus Medscape

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