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Velvet ant sting
Other Resources UpToDate PubMed

Velvet ant sting

Contributors: Robert Norris MD, Joanne Feldman MD, MS
Other Resources UpToDate PubMed

Synopsis

Velvet ants are not ants but rather a type of wasp found worldwide, especially in desert and sandy areas. They get their name because they look like large hairy ants, especially the wingless female (males have wings). Velvet ants are normally nonaggressive.

Velvet ant venom, like other wasp venom, is similar to bee venom, but the venoms are generally not cross-reactive. Velvet ant venom contains enzymes, small peptides, and amines. The allergens include the phospholipases, hyaluronidases, and cholinesterases. Some peptides cause histamine release by degranulating mast cells. Histamine, serotonin, and acetylcholine contribute to the pain associated with velvet ant stings.

The sting of a velvet ant is excruciatingly painful and causes localized redness and swelling.

There are no reports in the literature of anaphylaxis from a velvet ant sting, although, in theory, anaphylaxis is possible.

Codes

ICD10CM:
T63.421A – Toxic effect of venom of ants, accidental, initial encounter

SNOMEDCT:
403141006 – Ant sting

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Diagnostic Pearls

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Differential Diagnosis & Pitfalls

  • Allergic reactions
  • Anaphylaxis
  • Envenomation from Fire ant sting, Honeybee sting, or Wasp or yellow jacket sting

Best Tests

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Management Pearls

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Therapy

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References

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Last Updated:02/21/2018
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Velvet ant sting
A medical illustration showing key findings of Velvet ant sting : Pain out of proportion to exam findings, Painful skin lesions, Blanching patch
Organism image of Velvet ant sting - imageId=3393948. Click to open in gallery.  caption: 'Female thistledown or gray velvet "ant" (<i>Dasymutilla gloriosa</i>), Devore Heights, San Bernardino County, California.'
Female thistledown or gray velvet "ant" (Dasymutilla gloriosa), Devore Heights, San Bernardino County, California.
Copyright © 2024 VisualDx®. All rights reserved.