Learn how to say Infestation correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word infestation:
an invasion of parasites ⇒ The premises were treated for cockroach infestation. ⇒ Parts of California are suffering from an infestation of oriental fruit flies.
when there are an unpleasantly large number of people or things ⇒ a seasonal infestation of trade fairs and conventions