Bacteria has been detected in crayfish served by a restaurant which had been ordered to suspend operation after an outbreak of food poisoning earlier this month.

Inspection reports showed that Vibrio parahemolyticus had been detected in food samples provided both by Zheng Wen Qi Crayfish Donburi restaurant and its customers, Yangpu District government said on Friday.

“Considering the restaurant staff’s nonstandard practices in dealing with the excessive quantity of food, the incident is deemed as a food poisoning case caused by food affected by Vibrio Parahemolyticus,” a district government notice said.

A number of diners suffered from diarrhea, stomach aches and vomiting after eating crayfish donburi — a dish of crayfish meat on a bed of rice — at the outlet. The restaurant was so popular before the accident that it was said to have served 1,300 portions of donburi on its second day of opening.