A food worker at an Adelaide restaurant has tested positive to hepatitis A, potentially exposing diners to the disease.
Health officials said they believed the worker at the Yakatori Takumi restaurant in North Adelaide picked up the infection while overseas.
Chief Medical Officer Paddy Phillips said the risk to customers was considered low.
"However, it is possible that patrons who ate at the restaurant between September 21 and October 4 may have been exposed to thehepatitis A virus," he said.
"An alert has been issued to all GPs to be aware of the case and to arrange for appropriate testing for any patients presenting with possible hepatitis A infection."
Hepatitis A results in inflammation of the liver and is usually spread person to person or from consuming contaminated food or water.
Initial symptoms include a fever, loss of appetite, nausea, vomiting and malaise, followed by dark-coloured urine and jaundice.
Some sufferers may be ill for several months.
There have been five reported cases of hepatitis A in South Australia so far in 2011.
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