The bite of fleas in dogs and cats sometimes give you a
allergic reaction known as
"welt" on the neck or at the base of
The tail.
What best explains these observations is
the fact that (1) flea saliva
could provoke a response
immunological in dogs and cats (2)
fleas are microbes whose bites
reduce blood flow (3) saliva from
fleas is a toxic substance that
fleas release when they attack dogs and
cats (4) fleas are organisms
hosts whose saliva digests the fur of
the dogs and cats,