See below: Lice have origins dating back to prehistory, and early recorded history contains accounts of lice infestations. Lice do not spontaneously appear, and are not found in dust. Like other species, head lice result from breeding. Head lice infest humans, so pets like dogs and cats cannot contract or spread infestations. Lice have a lifespan of approximately one month.
Answered 7/25/2016
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