Although most epidemic human infectious diseases are caused by recently introduced pathogens, cospeciation of parasite and host is commonplace for endemic infections. Occasional host infidelity, however, provides the endemic parasite with an opportunity to survive the potential extinction of its host.
louse family Naked guy from
Nits look sort of like dandruff, only they can't be removed by brushing or shaking them off. Parasites — lice — head lice: Treatment. Use hot water and dry on a high heat.
What are lice?
Confirmation via Combing. There are a couple of ways to explain why we carry around a chimp-related genus and a gorilla-related genus of lice. With the advent of globalization, previously isolated human populations lost ninetenths of their number to the infections introduced by intrepid migrants and invaders [ 7 ]. Adult head louse.