"Wolston Correctional Centre has been placed into lockdown, and all staff are being individually contacted."

"We have ordered a forensic clean of all areas of the prison the officer attended during his shifts, and Queensland Health staff and management will be available to talk to officers tomorrow."

"We are working with Queensland Health to identify officers and prisoners who may have had contact with the officer during his shifts, and to facilitate testing and isolation of anyone who may meet the threshold for testing."

A Queensland Health statement said contact tracing was under way for the 46 new cases in the state.

"The majority of cases are from patients who have travelled overseas, or have had direct contact with a confirmed case who had travelled overseas," it said.