Fleas are usually associated with pets, since animals are their primary hosts. Flea's feed on cat and dog blood then lay eggs, which fall on the animal's nest, or anywhere the animal frequents.
The Flea life cycle is similar to the butterfly life cycle. Female fleas lay eggs that turn in to grub-like larvae. The larvae then develop into pupae and settle inside a cocoon. These eggs hatch into larvae, which in turn pupate into adult fleas. However, flea pupae can remain dormant for a year, making treatment of infestation areas very important for continued flea control.
Remember that adult fleas, pupae, larvae, and eggs (fleas at all stages) should be killed to rid your house of them completely. Resistive pupae and larvae grow on to become adult fleas in a few weeks even though the adult fleas are killed. Fleas should be removed from all stages in their life cycle, to protect your family and pets.
Ask the Entomologist.
Fleas use an anticoagulant to keep your blood from clotting, so they can get it. That is what your body is reacting to, which causes the itching. How much do they consume? 72 female fleas can consume 1 ml of blood per day.
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