This 2006 photograph depicted a dorsal view of a female body louse, Pediculus humanus var. corporis. Some of the external morphologic features displayed by members of the genus Pediculus include an elongated abdominal region without any processes, and three pairs of legs, which are all equal in length and width. One of the anatomical features displayed by the female louse is its concave distal abdominal tip, unlike the male (see PHIL# 9203, 9205, and 9206), which is convex, or rounded.Body lice are parasitic insects that live on the body, and in the clothing or bedding of infested humans. Infestation is common, found worldwide, and affects people of all races. Body lice infestations spread rapidly under crowded conditions where hygiene is poor, and there is frequent contact among people.
CDC/ Frank Collins, Ph.D.
November 2, 2012
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