Can you clarify what body lice really is?

BODY LICE. Body lice are tiny insects that infest humans. They lay their eggs on the seams of clothing. They cause intense itching in those people who have them. They are highly contagious. Cleanliness is most important for those who are afflicted. Washing of clothes and bedding with very hot soapy water is a must. Actually, no medication is necessary if the clothing and underwear are thoroughly washed.
Infestation. Body lice are tiny animals that infect humans. They are contracted by skin-to-skin contact with persons who have them, or by wearing their clothes. Head lice and body lice are caused by the same animal; pubic lice is caused by a slightly different but related mite.