An aged care home caught up in an outbreak of coronavirus in Adelaide's north says two more staff members have tested positive to COVID-19, taking the total number of infected workers to four.
The home in Brompton, which is managed by Anglicare South Australia, was locked down on Monday after two nurses a mother and daughter, tested positive.
Anglicare SA CEO Peter Sandeman said while all the residents had so far tested negative, two more staff had subsequently tested positive and are now in quarantine.
"This is the worst nightmare any aged care proprietor can face," he told Nine's Today Show on Tuesday.
"The residents are holding up well, the staff are all caring for the residents and progressively, of course, we will have to replace staff who are assessed as a risk."
Mr Sandeman said staff are being tested as they as they turn up to work and residents of the facility, which houses homeless elderly people, will undergo another round of testing as soon as Wednesday.
"If any resident tests positive they will be removed to hospital straight away," he added.
The home has been caught up in an outbreak of coronavirus cases believed to have been sparked by an infected returned traveller in hotel quarantine who passed the virus onto a cleaner, who then infected family members.
Premier Steven Marshall told Seven's Sunrise program it was an extraordinary situation.
"This was a back of house person working in the hotel that we believe acquired it from coming into surface contact, so they never came into contact with anybody in a room," he said.
Mr Marshall said "thousands" of tests were conducted on Monday.
But he also said SA Health had only confirmed one new infection overnight, involving a close contact of one of the hotel worker's family members.
An official case numbers update will be released later on Tuesday.
As of Monday afternoon, the so-called Parafield cluster had grown to 17. The cases range from a one-year-old to two people in their 80s and taking the total number of active infections in SA to 34. The other 17 are returned, overseas travellers.
All are in hotel quarantine, except for two from the new outbreak who have been admitted to the Royal Adelaide Hospital as a precaution because of their age.
Three staff, including two security guards, from one of Adelaide's quarantine hotels are among those who tested positive.
Staff at all quarantine hotels will now be tested weekly.
The growing cluster has prompted the SA government to reimpose a range of coronavirus restrictions.
From Tuesday, all gyms, recreation centres and play cafes are closed for two weeks with community sports fixtures and training cancelled.
Funerals and family gatherings are now capped at 50 people, and all church gatherings at 100 people.
Pubs, clubs and restaurants are limited to 100 people along with all other public gatherings.
All venues must abide by a rule of one person to every four square metres.
Masks are mandatory for workers in personal care businesses and for workers in aged care if physical distancing is not possible.
Aged care workers will be limited working at just one site but schools will remain open.
The government has also asked all people to work from home if they can and to reconsider unnecessary travel of any kind.
People in Australia must stay at least 1.5 metres away from others. Check your jurisdiction's restrictions on gathering limits.
If you are experiencing cold or flu symptoms, stay home and arrange a test by calling your doctor or contact the Coronavirus Health Information Hotline on 1800 020 080. News and information is available in 63 languages at
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