We have a rat infestation. Everyone is busy trying to hunt the rats down.

You could see the weevils that have infested the rice.

These trees must be infested.

Tom's home has a kobold infestation.

Tom's apartment is infested with cockroaches.

Some spruces are bark-beetle infested.

The dog is infested with ticks.

We discovered that that house is infested with garter snakes. They're all over the place!

Sami's club has a roach infestation.

Panspermia, the idea that biotic matter infested planets from falling objects from space, became taught as fact by the 22nd century.