Queensland has recorded its 13th "incursion" of COVID-19 in the community in the past six weeks when a man tested positive after leaving hotel quarantine.

He was potentially infectious in the community from July 22 and was staying in the City Backpackers hostel on Roma Street in Brisbane.

Guests at that hostel as well as another city backpacker lodge next door are both in lockdown awaiting test results.

Contract tracers are compiling a list of where the man has been.

Chermside has just been added to the list of exposure sites.