"Early signs are very positive": SA announces one new case of COVID-19

Premier Steven Marshall has announced one new COVID-19 case in South Australia, which has been linked to the Tenafeate Creek Wines cluster that was announced two days ago and has now risen to eight cases.

Last night, SA health authorities also listed another winery in the state's growing list of exposure sites which now totals 79 - the Seppeltsfield Winery in the Barossa Valley.

The new case is a man who has been transferred to Tom's Court Hotel after developing symptoms while in quarantine, where he has tested positive.

The state has also hit an all-time record in testing with 23,572 results returned. The waiting time for results has remained around the 12-hour mark.

"All the early signs are very positive this will just be a seven-day lockdown," Premier Marshall says.

"I think we have cause for optimism, but we've only got cause for optimism because of the great cooperation that we have had from the people of South Australia.

A new testing site will also be added at Netball SA Mile End to keep up with demand.

Parts of the TAFE SA Regency Park campus have also been identified as tier 1 COVID-19 exposure sites, forcing people who attended those sections of the campus to immediately go into quarantine.

Anyone who attended the G block on the campus between 8:30am - 4:40pm on Monday must get tested immediately and quarantine for 14 days with all members of their household.

Other sections of the campus identified as tier 1 exposure sites include the campus's C and F block, iCentral and the main entrance. Anyone who was at those locations from 9:45am - 11:00am must also quarantine.

The entire campus has been listed as a tier 4 site, urging anyone who attended the campus to monitor for symptoms and get tested if they begin to feel unwell.

Today's announcement brings the total case numbers in South Australia to 15. 

Updated at 11.45pm AEST on 23 July 2021.