The natural host of cat fleas or Ctenocephalides felis is the domestic cat. However, because fleas are obligate blood-suckers, feeding off warm-blooded mammals, it is not uncommon that cat fleas can also bite into the skin of humans. This doesn’t mean that they will live on the skin of humans, however. It just so happens that because of our closeness with our pets, these pests do inadvertently latch onto our skin. Human skin is very different from cat skin so it will not really be very hospitable for cat fleas to thrive.\r