Cats get a lot of these parasites through predation — killing — a possibility in owned cats with outdoor access or the potential for visits from mice, voles and
other transport hosts, such as fleas.
The life cycle of the lungworm includes frogs, lizards, birds, and rodents
as transport hosts of encysted larvae.
Sometimes
a transport host (such as a a rodent) can be involved.
These prey animals that carry worm larvae are called paratenic or
transport hosts.
The life cycle of the different parasites can be complicated, involving both intermediate hosts and
transport hosts.
Ingesting infected tissue of
a transport host - By eating rodents, birds, or insects (transport hosts) that have larvae in their tissues, your cat may become infected with roundworm.
The transport host is the raccoon.
When one of
the transport hosts is eaten by a cat, the lungworm larvae migrate from the stomach to the lungs.