Coronavirus tests have been put under the microscope as the strict criteria excludes country people with symptoms who have not travelled or been identified by SA Health, according to the Opposition.
Health spokesman Chris Picton called for the "testing" of "every suspected case" amid the deadly virus cases increasing by 400 per cent in one week.
His response reflects the World Health Organisation's message for all countries to "test, test, test" each suspected case of the disease.
Mr Picton outlined circumstances affecting country people with respiratory symptoms in areas such as the Barossa Valley.
He said people in this region "would not meet the criteria for testing" unless SA Health had contacted them and identified them as a close contact of an infected person.
"We have not a moment to lose in making sure that those 100 cases have not infected others in South Australia," he said.
The state government believes it has responded swiftly to the COVID-19 pandemic with measures including the setting up of dedicated centres and clinics, including in the regions.
COVID-19 clinics to open across the state:
Drive-through centres are located at:
Health Minister Stephen Wade was unavailable for comment at the time the story ran.
However, in an email, Premier Steven Marshall told the public his team has been working hard to prepare for the impacts of the disease.
Last week, a COVID-19 command centre was launched, he said.
The multi-agency centre co-ordinates the government response to the pandemic.
In addition, two hospitals will now deliver 188 beds into the state's health system to manage the impacts of the disease.
Furthermore, the opening of regional SA COVID-19 clinics plan and protect the community against the spread of the virus.
For more details about the clinics and centres provided by SA Health click here.