Adult: The adult louse is about the size of a sesame seed, has six legs, and is tan to grayish-white. In persons with dark hair, the adult louse will look darker. Females lay nits; they are usually larger than males. Adult lice can live up to 30 days on a person's head.
The four tick-borne diseases are 1) borreliosis (including Lyme disease and related conditions), 2) Rocky Mountain spotted fever, 3) ehrlichiosis, and 4) tularemia, which is also known as rabbit fever.
Mostly, itâs these ticks that gives illnesses to people: 1  American dog tick, also called a wood tick. 2  Blacklegged tick, also called a deer tick. 3  Brown dog tick.  Gulf Coast 1  tick. Lone star tick.  Rocky Mountain wood 1  tick. Western blacklegged  tick.