There are a surprising number of Sizzler restaurants scattered around Australia. One in Booval, Queensland, west of Brisbane, is apparently the source of a suspected gastro outbreak.

Public health physician Dr Kari Jarvinen and Sizzler confirmed the Ipswich restaurant was being investigated after multiple reports of gastro.

He said the venue was co-operating in the investigation and would be checked to assure the appropriate level of sanitation and cleaning had taken place.

Woodend mum Kellie Roussounis-Adams and her family became ill with a gastro illness after eating at the restaurant last Friday.

“The following day my entire family was sick, including my two children,” she said. “My husband, who works as a concreter, was forced to take a day off work.”

Mrs Roussounis-Adams became aware of the gastro outbreak through social media.

Sizzlers refunded the cost of the meal to Mrs Roussounis-Adams, which is helping Queensland Health identify the source.

A Sizzler spokeswoman said customers had raised their concerns after the Friday night.