It’s clear that rat fleas played a major role ... They're different from head lice, which are far more common in the U.S. and typically affect school-age kids. Both insects feed on human ...

Researchers thought the bacterium would infect fleas on rats, and when the rats died, the fleas would jump to humans, infecting them. Rats are also thought to be responsible for spreading more recent ...

Head lice affect more than 100 million people worldwide annually. Permethrin (1% formulation) is efficacious but resistance is emerging. Malathion (0.5% formulation) is an alternative, but ...

Lice and mosquitoes can also make the skin ... starting from the head and working toward the tail. Working from head to tail prevents fleas from jumping up your dog's back during a bath.