Human lice are insect parasites, spending their entire life on the human scalp and feeding

exclusively on blood.

Humans might be infested by two louse species: The human louse, Pediculus humanus, which is represented by two sub-species:

– The head louse (Pediculus humanus capitis) and

– The body louse (Pediculus humanus humanus)

while the second species is:

– The pubic (or crab) louse (Pthirus pubis)