infestation
nounUK /ˌɪnfesˈteɪʃn/
US /ˌɪnfesˈteɪʃn/
A time when many bugs or animals come into a place and are hard to get rid of.
The kitchen had an infestation of ants after the crumbs were left out.
OTHER MEANINGS
2. The state of being filled with something harmful or unwanted.
The old house suffered an infestation of mold after the flood.
3. A large number of parasites living on a plant or animal.
The vet treated the dog for a flea infestation.
4. The act of overrunning or crowding into a place in large numbers.
The town struggled with an infestation of tourists during the festival.