Melbourne City Council says it is working closely with traders to combat "a number of incidents of rodent infestation" at Queen Victoria Market.

The city's environmental health officers are working with 13 market businesses that were rated "unsatisfactory" after pests were discovered at their premises during inspections conducted between between January 2015 and September 2016.

Melbourne's Queen Victoria Market Credit:Marina Oliphant

Council spokeswoman Claudine Ledwidge-O'Reilly said follow-up inspections found that all the traders had complied with required actions to manage and/or eliminate pests.

"The City of Melbourne acknowledges that there have been a number of incidents of rodent infestation at Queen Victoria Market," she said.