vermination

verb (used without object), ver·mi·nat·ed, ver·mi·nat·ing.

1. to become infested with vermin, especially parasitic vermin.
2. Archaic. to breed or infest with vermin.

noun

1. the spreading of or infestation with vermin

n.

1. The production or breeding of worms or larvae.
2. Infestation by vermin, especially parasitic vermin.