Renowned Australian composer Brett Dean has been diagnosed with coronavirus and is currently receiving treatment in Adelaide, his agents have confirmed.

The 58-year-old was due to lead the Adelaide Symphony Orchestra in a concert at the Adelaide Festival on Saturday night.

Dean had withdrawn from that event because of a suspected case of pneumonia.

However, the Brisbane-born musician was one of two people in South Australia diagnosed yesterday with coronavirus — the other being an eight-month-old boy.

"Brett's doing well, I spoke to him earlier this morning and he's in good spirits — although, because he's been in touch with his agents overnight, I think he had a pretty sleepless night one way or another," Adelaide Festival executive director Rob Brookman told ABC Radio.

"He was presenting with pretty severe symptoms, similar to pneumonia.

"He spent two nights before he went into hospital, but he was feeling unwell so he never made it into rehearsal with the symphony orchestra, so he's not been in touch with the orchestra.

Read more: https://www.abc.net.au/news/2020-03-06/composer-brett-dean-diagnosed-with-coronavirus-in-adelaide/12031874