Raw mung bean sprouts thought to be behind more than 230 Salmonella cases in South Australia have been sourced back to Queensland.
Almost half of the Salmonella Saintpaul cases have developed over the past 12 days and 43 people have been hospitalised since the outbreak began in December, SA Health says.
Chief medical officer Paddy Phillips, who usually sees fewer than 20 cases of the strain each year, has urged people not to eat raw bean sprouts and warned food outlets not to serve them raw.
The seeds came from QLD before being sprouted and packaged in South Australian factories but SA Health doesn't know where they were contaminated.
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