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March 2005

Black Nodular Lesions on the Foot—Diagnosis

Arch Dermatol. 2005;141(3):389-394. doi:10.1001/archderm.141.3.390-a

Fragmented parts of digestive tubes, cuticle, muscle bands, and several ovaries were observed in the samples. The findings were consistent with a clinical diagnosis of infestation by a jigger flea.

The flea T penetrans is also known as the jigger flea, chigoe flea, sand flea, or nigua.1 It causes an inflammatory condition that was originally found in Central and South America and spread to West Africa around 1873.2 It is now endemic in sub-Saharan Africa, India, and Pakistan.3 Clinically, a typical lesion resembles a small abscess with a necrotic center.3,4

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