Eight closure orders and one prohibition order were issued on food businesses last month, according to the Food Safety Authority of Ireland.
The orders were issued on retailers and restaurants in counties Limerick, Meath, Cork, Tipperary Galway and Dublin.
The businesses affected by the closures were Echemas Trading Store, Limerick; Khyber Garden in Kells, Co Meath; Oldcourt East Bakery in Cork; Bengal Indian Foodstall at Semple Stadium, Tipperary; Kings, Bayside Shopping Centre, Dublin; Super Ketones, Prospect Hill in Galway; the Mint Leaf restaurant in Drumcondra and Baby Pure Water Limited, Ardbraccan, Navan, Co Meath.
In its report, the FSAI said inspectors saw a "live rat" in the yard near a defective open drain at the Khyber Garden restaurant.
It said that a "live rat was emanating from the drain when the tap at the kitchen sink was switched on". Rat droppings were also evident in the boiler room off the kitchen, the authority said.
The Mint Leaf restaurant in Drumcondra was found to have had dirty chopping boards, with "engrained dirt and black mould present".
The authority also found inadequate drainage facilities and a lack of inadequate dedicated staff toilet at the restaurant.
A closure order was issued on Oldcourt East Bakery in Cork after inspectors found flies, crawling insects and cobwebs on surfaces and equipment throughout the main bakery and in associated areas.
The FSAI said that "four flies were observed in a mixture of dough".
The Chief Executive of the FSAI, Dr Pamela Byrne, said it was "very concerning" that the closure orders were issued due to filthy conditions and unhygienic practices.
She said: "Closure Orders and Prohibition Orders are served on food businesses only when a serious risk to consumer health has been identified or where there are a number of ongoing serious breaches of food legislation."