Blister beetle dermatitis
Blister beetle dermatitis is a cutaneous condition that occurs after contact with any of several types of beetles, including those from the Meloidae and Oedemeridae families.:449 Blister beetles secrete an irritant called cantharidin, a vesicant that can get onto humans if they touch the beetles.
The term "blister beetle dermatitis" is also occasionally and inappropriately used as a synonym for Paederus dermatitis, a somewhat different dermatitis caused by contact with pederin, an irritant in the hemolymph of a different group of beetles, the rove beetles.
After skin comes in contact with cantharidin, local irritation begins within a few hours. (This is in contrast to Paederus dermatitis, where symptoms first appear 12–36 hours after contact with rove beetles.) Painful blisters appear, but scarring from these epidermal lesions is rare.
- James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.
-  'Paederus dermatitis' by Gurcharan Singh and Syed Yousuf Ali, Indian Journal of Dermatology, Venereology and Leprology, Jan-Feb 2007
- "7.7 Blister beetles, clinical features". Institute of Tropical Medicine. Retrieved 11 August 2011.
On skin contact with cantharidin-containing blister beetles, local tissue irritation occurs after a few hours. This results from the disruption of tonofilaments in the desmosomes with acantholysis and intra-epidermal blister formation.
- "Just the facts…Paederus Beetles". US Army Public Health Command. Retrieved 30 July 2011.
- Barceloux, Donald (2008). Medical toxicology of natural substances: foods, fungi, medicinal herbs, plants, and venomous animals. John Wiley and Sons. p. 973.
- Research paper describing both blister beetle dermatitis and Paederus dermatitis, with photos of both
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