Skin lesions simulating blue toe syndrome caused by prolonged contact with a millipede

Abstract

Venomous animals are those that, by means of a hunting and defense mechanism, are able to inject their prey with a toxic substance produced in their bodies, directly from specialized glands (e.g., tooth, sting, spur) through which the poison passes. Millipedes are poisonous animals; they can be harmful to humans, and their effects usually manifest as erythematous, purpuric, and cyanotic lesions; local pain; and paresthesia. Here, we report a case of skin contact with a millipede for 6h resulting in skin lesions similar to blue toe syndrome.

Answers to Dermatophile

“…They do not have fangs but do have lateral glands that produce hydrogen cyanide and quinones to repel predators. The release of these toxins on to human skin can cause injuries ranging from mild local pain or paraesthesia to necrosis 5 6. However, contact with these substances usually leaves only a purpuric or brown hyperpigmentation, with little inflammation 5.…”

“…The release of these toxins on to human skin can cause injuries ranging from mild local pain or paraesthesia to necrosis 5 6. However, contact with these substances usually leaves only a purpuric or brown hyperpigmentation, with little inflammation 5. Hyperpigmentation can last for months, but alcohol or ether can be used to dissolve the pigment and reduce the colour 7.…”

“…Skin lesions caused by millipedes usually occur on the feet, because these arthropods seek refuge in dark places, especially shoes 7. Because of the purpuric appearance, skin changes caused by these animals can mimic lesions due to arterial occlusion, trauma, chilblains or even cryoglobulinaemia,5 which mostly cause symptoms such as pain, burning or itching.…”