A Brisbane child has been tested positive for coronavirus after the year 3 student and their family were in self-quarantine since the weekend.

One of the child's parents and their partner were also confirmed to have the virus.

School parents and caregivers received an email from Stretton State College, in Brisbane's south, on Wednesday, who thanked the family for their "prompt action".

"Queensland Health has advised that the student was not at school during the contagious period of their illness," the email read.

"While there is a low risk of transmission given the early action by the family to self-quarantine, Queensland Health is now undertaking contact tracing and as a matter of further precaution, I have asked for specialist cleaners to conduct a deep clean of the campus."

The school's Gowan and Illaweena campuses will be closed on Thursday and Friday for cleaning to take place.