The Food Safety Authority of Ireland (FSAI) has served 13 closure orders and one prohibition order to food businesses in November.
Some of the reasons for the closures outlined by the FSAI included:
Other premises were reported as having "filthy" staff uniforms, no hot water, soap or paper towels at wash basins and refrigerators and freezers showing evidence of rust, mould and dirt.
Here is the list of orders issued for November:
Tesco Ireland has confirmed a pest incident in its Carrick-on-Shannon store, saying: "Following a report from a customer in our Carrick-on-Shannon store a pest issue was identified.
"As is standard a temporary closure notice was issued on the evening of November 6. We immediately arranged for a pest control company to carry out a thorough inspection and the store reopened at 3.30pm the following day, with all appropriate measures taken.
Tesco operates to the highest health and hygiene standards and regrets this issue arose and inconvenienced customers."
Commenting on the closures, FSAI Chief Executive Dr Pamela Byrne said: "Fourteen Enforcement Orders in one month is an unacceptable number. The reasons for the Enforcement Orders having to be served are all easily preventable in the first place and food businesses should not allow their standards to slip.
"All food businesses must ensure that they adhere to a high standard of food safety and hygiene at all times.
"It is also imperative that a proper pest control system is in place and that this is checked very regularly in order to avoid infestations of rodents and insects.
"With the busy Christmas period upon us, food businesses must be especially vigilant to ensure compliance with the law."