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Description:Note the swelling and erythema of the left hand and wrist when compared to the right, brought on by the sting from an Io Moth, Automeris io, larva.
During its developmental stages, or instars, the Io Moth larva undergoes changes, becoming a stinging, or urticating caterpillar. The spines on these larvae are extremely sharp, and release their toxin with very little stimulation. Reactions to the toxin range from a stinging pain and swelling, to anaphylactic shock, and death.
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Content Providers(s):CDC/ M.A. Parsons; Cmdr. W.B. Hull
Creation Date:1961
Photo Credit:R.E. Byrd
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.