#1 infest v. [overrun] invade in great numbers; "the roaches infested our kitchen". wn
#2 infest v. [invade, overrun] occupy in large numbers or live on a host; "the Kudzu plant infests much of the South and is spreading to the North". wn
#3 infest v. live on or in a host, as of parasites. wn
vizzz