A Merseyside man caught 46 rats in his small two-bedroom home while attempting to battle a rodent infestation.
The grim discovery was revealed at a Knowsley Council meeting this week.
Members of the council's sustainable borough scrutiny committee discussed how pests including rats, mice and bed bugs are controlled in the borough.
The pest control service has undergone major changes since 2015, with the removal of free call outs and other changes to how it is run making it more financially stable.
But while discussing the issue, councillor Harry Bell, who represents Northwood in Kirkby, said the service had been forced to go to one of his constituent's house multiple times because of the extent of the rodent problem.
He said: "He had 15 visits because he caught 46 rats in a little two-bedroom house.
"He was also landlocked between a number of different property owners and that makes it really hard to establish where they are coming from."
Councillor Bell did not go into any more detail about the case but said the council should continue to support residents who face problems with rodents.
Head of neighbourhoods Denise Best said the overhaul of the pest control service meant it now didn't require subsidy and no longer ran with the £79,000 annual deficit it had in 2015.
Call out costs vary, with the price for mice and rats currently standing at £24.
Residents get at least two visits within that cost.
Ms Best said the move had had major effects in terms of both financial sustainability and efficiency - but warned there were a number of issues councillors and residents should be aware of that could affect rodent sightings in Knowsley.
There are currently plans for hundreds of new homes across the borough and Ms Best said large scale construction projects could disturb rats from where they normally nest.
She said although there was often no increase in the number of rats, they might be more visible as a result.
The committee also said it would look at taking a harder line against social landlords that did not act in a suitable way to undertake regular maintenance to ensure homes weren't susceptible to rat infestations.
Some of the social landlords in the borough now charge for basic repairs to properties, something she warned could have a knock on effect.
Ms Best said: "This has an additional impact on our ability to treat some problems.
"Not only are those buildings not properly rat proofed, we are going back multiple times to the same properties."
She acknowledged there were some "frustrations" with the current situation.
They also said they would look at working more closely with United Utilities to try to reestablish sewer baiting programs in the borough's drains.
Unlike other boroughs in Merseyside sewer baiting, the laying of traps or poison in sewers, has not been undertaken in Knowsley for a number of years.
Ms Best said she believed it was the council themselves that had halted an agreement with United Utilities to undertake sewer baiting and that it could be 2022 before a new agreement could be established.
