A salmonella outbreak in Launceston has led to three people being admitted to hospital and two bakeries closing their doors. The outbreak has made 20 people sick and health authorities are expecting more cases in coming days.

The director of public health, Roscoe Taylor, says one of those admitted to hospital was treated in intensive care but has returned to the wards. Another patient has been discharged.

Dr Taylor says the outbreak has been traced to the Trevallyn and Sugar Shack bakeries, which sold baked goods to 26 small outlets in the Launceston area. He says people should not eat any suspect goods.

"If they’re uncertain, they should ask the shop where they bought them where they obtained those bakery products, so that if they do happen to have come from the two principal bakeries, then they dispose of them," Dr Taylor said.