Victoria’s Department of Health and Human Services has issued a hepatitis A alert to diners who ate at Melbourne’s Cumulus between February 26 and March 19 this year. The department confirmed a case of the viral liver illness in one of the CBD restaurant’s food handlers, who was working while infectious during that period.

“Any person who ate food – especially uncooked food – at Cumulus Inc. between February 26 and March 19, 2018 may be at risk of hepatitis A infection and should attend their GP for a free hepatitis A vaccine,” the department said in an alert on its website.

The department also advised those diners to “look out for the symptoms of hepatitis A between 15 to 50 days after the exposure”.

The Flinders Lane restaurant remains open with “the full support of Victorian Government authorities,” Cumulus said in a statement. “It is an isolated incident at this stage.

“There is no ongoing risk to diners.”

An environmental health officer for the City of Melbourne confirmed the restaurant’s “processes and hygiene systems … are robust after completing a comprehensive review,” Cumulus said. “We have been working closely with relevant government authorities and are confident in the exacting standards and protocols taken.”

Get our pick of the best news, features and events delivered twice a week

Hepatitis A is a viral infection of the liver, bringing on a loss of appetite, nausea, fever and stomach cramps, followed days later by dark urine, pale stools and jaundiced skin. It is usually transmitted via contaminated hands, objects, water or food.

The Cumulus staff member showed symptoms of illness on Friday March 16 and was immediately sent home. When he returned to work on Monday, he was again sent home, with hospital authorities later confirming he had contracted the infection. He is expected to make a full recovery.

For more information, visit the Health Victoria website.