A group of American tourists are in quarantine in South Australia’s Barossa Valley after 10 of them tested positive for the novel coronavirus.

The 18 travellers have been in isolation for the past few days while they awaited their test results, SA Health confirmed on Saturday.

“At the moment none of them need to be admitted to hospital but that may change in the coming days,” SA Health’s Chief Public Health Officer Nicola Spurrier said to reporters.

Spurrier added that the group arrived in Australia before they needed to go into a 14-day quarantine.

She said SA Health believed the tourists had travelled through the eastern states before arriving in Adelaide.

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The tourist group is currently in quarantine in their Barossa Valley accommodation.

Four of this group have returned negative results, where four tests are still pending.

Hospital beds

The news comes as the state confirms they have purchased an extra 90 hospital beds to help cater for the expected peak in coronavirus cases.

South Australia expects the worst of the COVID-19 pandemic to hit late April or early May, though Premier Steven Marshall says the modelling is changing constantly.

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He says work to put the extra beds in place will start on Monday but it’s hoped the extra capacity is never needed if other measures are successful in reducing the extent of the outbreak across SA.

“We need to do two critical things. One is to slow the spread of this disease and to reduce the peak, pushing it as far into the future as possible,” Mr Marshall said on Saturday.

On Saturday, the state recorded 17 new cases, taking the total to 67.

- with AAP