Several distinct rickettsiae (a parasite carried by ticks, fleas, and lice) cause a disease known as typhus in humans.All cause disease with similarities of fever, headache, and rash.
It is typically transmitted by inhaling infected aerosols, like contaminated water sprays, jets, or mists and causes a disease called legionellosis with two distinct entities.
All of the methods that involve passing a virus through a non-human host produce a version of the virus that can still be recognized by the human immune system, but cannot replicate well in a human host.