There has been another five confirmed cases of salmonella poisoning in Tasmania, bringing the total number so far to 57.

The Public and Environmental Health Service says the latest victims have not needed to go to hospital.

"The bulk of the cases are from Launceston and surrounding areas and all cases appear to be connected to the two Launceston bakeries - the Trevallyn Gourmet and the Sugar Shack," said Senior medical adviser Avner Misrachi.

The cause of the outbreak should be known in the next few days.