Usage Note
Infester describes an invasion by pests, parasites, or harmful organisms — infesté de rats (infested with rats). It is a regular -er verb. The adjective infesté is more common than the verb itself in everyday usage. Figuratively, infesté can describe a place overrun with undesirable people or things — infesté de touristes is a colloquial exaggeration sometimes heard in summer.
Examples
"La maison est infestée de moustiques."
Natural Translation
The house is infested with mosquitoes.

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