A newborn baby from Adelaide has died in hospital after contracting meningococcal disease.
SA Health confirmed on Sunday it had been notified of a case of invasive meningococcal disease in a seven-week-old girl.
"Tragically, the baby has died in hospital," a statement said.
Multiple people were in contact with the child, with seven told to take clearance antibiotics.
Medical experts are yet to identify the exact strain of meningococcal that infected the newborn baby.
Five cases of invasive meningococcal disease have been reported in SA this year, well down from the 25 to the same time in 2019.
Of those five cases, two were serogroup B, two serogroup Y and one is awaiting typing.
There were 27 invasive meningococcal cases reported statewide in 2019, with 19 from serogroup B and four apiece from serogroup W and Y.