Winter hat season is right around the corner, and I’ve been asked to write about head lice.
lice are white and about the size of a sesame seed. They are known as
"obligate ectoparasites." Obligate means they require a placental mammal
host to survive (i.e. humans) and ectoparasites means they live outside
the human body. They can't live off of a body for more than a day or
so. They also must feed on the host's blood to survive. Lice are spread
by direct contact of a person's head or hair with an infested individual
or through sharing personal items such as hats, towels, brushes,
helmets, hair ties or even car seat headrests. They do not jump or fly
and are not transmitted by pets.