"rat infestation" is a perfectly correct and usable phrase in written English.
An example sentence would be: "The health inspector declared the apartment unfit for living due to a severe rat infestation."
The rat infestation at the beauty salon was a bigger deal.
Unfortunately, a rat infestation wiped out my optimism and desire to invite friends over.
The protest follows a UCL protest late last year, against noise and a rat infestation.
Three centuries of rat infestation have caused significant declines in populations of seabirds, songbirds and small mammals.
This could affect the health of my newborn baby"; "Extremely angered by familymosaic's response to rat infestation.
In the Pied Piper of Hamelin, a man with a magical pipe saves a town from its rat infestation.
Last year UCL paid out £400,000 in compensation to students for rat infestations and noise pollution.
The weather is proving a bonus for pest control firms, who are reporting an increase in callouts to rat infestations.
Earlier this term, one of the halls was flooded with sewage and two of university residents have reported rat infestations.
Others have been cited for leaks, rat infestations and violation of housing codes that set restrictions on maximum occupancy and rooming unit conversions.
The walls and ceilings have large patches of black mould, the roof leaks and there are periodic rat infestations and boiler breakdowns.
