Another family said three adult family members had been forced to take the day off work so they could get themselves and their grandchildren and children tested.
Mr Pitt said they had not received any information from Queensland Health that any of the students on the tour had tested positive to the virus.
"I am very concerned about the second individual who has not been cooperative and has not shared with us where she has been", she said.
Nearly 1000 people were tested in the Metro South health district yesterday and the results of those tests are expected to come back later today.
"So our focus now is working with those young women to identify everywhere that they have been since they have come back into Queensland".
Mr Cully confirmed that alongside the infected staff member, "a number of other staff members have also been placed in isolation as a precautionary measure due to their direct contact with the infected person".
It's understood the case is connected to Chatswood Hills State School in Springwood.More news: IPL 2020: Franchises Want Clarification About Squad Strength
A fever clinic will be set up at the college to test students, staff and community members.
The alarm was raised yesterday when two 19-year-old women from Logan and Acacia Ridge tested positive for coronavirus, believed to have been contracted in Melbourne.
"These young women have gone about their business with in the communities that they live in and so there will be a large amount of contact tracing to be done, largely within it the Logan and Springfield areas, including shopping malls, restaurants and a church", he said.
Both had recently travelled together to Melbourne, returning to Queensland via Sydney.
"They travelled on flights VA863 and VA977", Mr Miles said.
It comes after a worker at the YMCA Chatswood Hills Outside Hours School Care returned a positive coronavirus result yesterday.
"We've seen in other states that the most important thing in the period while we see if there is any other community transfer is making sure that nobody in an aged care facility is exposed", Ms Miles said.More news: Unsealed court documents reveal Ghislaine Maxwell's connection with Epstein
"We want to ensure that everyone in Queensland, no matter where they are, what community they identify with, what language group they identify with, that everybody in Queensland knows what they can do to keep themselves and their community safe", Mr Miles said.
"Accordingly, the hall was thoroughly cleaned on early Monday morning before any use by students and staff".
Returning Queenslanders who have spent any time in Victoria in the 14 days before coming home must quarantine in a hotel at their own expense.
"The school will temporarily close until further notification to allow for cleaning and work will commence on contact tracing".
In a letter to school personnel, obtained by The Courier-Mail¸ Queensland Health urged anyone feeling unwell to "isolate immediately and avoid contact with others".
"Public Health will speak to all households (in the school) when you can".
Queensland Health said the risk of transmission to Parklands Christian College's 650 students and 53 teaching staff was not considered high, but it was taking all necessary precautions.More news: The iPhone 12 is definitely delayed
The panic came after three new cases were confirmed in the state that involved a series of bungles by two "reckless" 19-year-old girls, Olivia Winnie Muranga and Diana Lasu, who traipsed their way across Browns Plains in Logan to Southbank over several days while showing symptoms of the virus.