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 ...

No pier or fairground was complete without a tent into which spectators would be ushered to watch human fleas perform their feats, accompanied by the rapid patter of a ‘professor’, as all flea ...

They are known for their role in transmitting various diseases and causing discomfort to pets and humans alike. Recent research has focused on understanding flea biology, species identification ...

Chances are, if you're wondering about cat fleas on humans, you've noticed a few small bright red spots running up and down ...

PFAS (per-and polyfluoroalkyl substances) are often referred to as “forever chemicals” because they don’t break down and can accumulate in humans. They are associated with a variety of ailments, ...