Residents of Melbourne's south-east have been warned to look out for the symptoms of measles after a man with the highly infectious disease visited a number of densely populated areas.

The affected areas are in Dandenong, Rowville, Ferntree Gully, Rowville, Knoxfield, Belgrave and Wantirna South.

Between February 8 and 12 the man visited a Centrelink, a cricket ground, two basketball stadiums, a secondary college, a bottle shop and a costume store.

Deputy chief health officer Dr Brett Sutton warned residents to look out for common cold symptoms followed by a fever and rash.

“People who develop illness over the next week should alert their doctor or hospital emergency department,” he said.