Next in line is the body louse—the only dangerous member of the troika.
The body louse lives in the folds and seams of the clothing of its host, passing to the skin only when it wishes to feed.
The louse commonly present is the body louse, and it lays its eggs in the seams of the uniforms and on the underclothes.
The P. corporis, the body louse, is of a dirty white colour, and varies from half to two lines in length.
The causative organism of typhus fever is thus transmitted by the body louse.
"parasitic insect infecting human hair and skin," Old English lus, from Proto-Germanic *lus (cf. Old Norse lus, Middle Dutch luus, Dutch luis, Old High German lus, German Laus), from PIE *lus- "louse" (cf. Welsh lleuen "louse"). Slang meaning "obnoxious person" is from 1630s. The plural lice (Old English lys) shows effects of i-mutation. The verb meaning "to clear of lice" is from late 14c.; to louse up "ruin, botch" first attested 1934, from the literal sense (of bedding), from 1931.
body louse n.
A parasitic louse that infests the body and clothes of humans.
n. pl. lice (līs)
Any of numerous small, flat-bodied, wingless biting or sucking insects of the orders Mallophaga or Anoplura, many of which are external parasites on humans.