More health resources have been directed to country areas in a 24-hour response to the rise in close contacts of confirmed COVID-19 cases.
An extra 10 clinics now operate in the regions in reaction to about 1000 people who are now being contacted daily by SA Health for symptoms checks, compared with 900 on Wednesday.
It is unknown whether these close contacts present virus symptoms.
SA Health confirmed for the first time that 44 people have recovered.
There are now 385 confirmed cases in South Australia, an increase of 18 in a 24-hour period.
According to SA Health, 114 of these cases have been linked to travel on cruise ships, 81 specifically from the Ruby Princess.
There have been close to 30,000 laboratory tests run by SA Pathology through the state's 54 clinics, with 48 of those based in regional locations.
SA Health confirmed that seven patients are being treated in Intensive Care Units, five of whom are in critical condition and two in stable condition.
They say that where there has been public exposure, tracing of the patients' movements continues to take place.
Residents at high risk of exposure are being identified and contacted with information and advice.
The next update is expected on April 3 at 5pm or as the situation changes.
For more updates and details, visit the SA Health website or contact the SA COVID-19 Information Line on 1800 253 787.