Salmonella contamination has been determined as the cause of mass food poisoning among 231 people who ate food prepared by Kuisine Catering in February

Initial reports said that about 130 people were known to have become ill after consuming food from the caterer, but a total of 231 are now linked to the case.

The alarm was first sounded when 33 people fell ill after a birthday party in February. Later, more affected consumers said they experienced vomiting and had diarrhorea after consuming food prepared by the caterer from Feb 12 to 14.

In its latest report, Lianhe Wanbao reported that the company has since shut its business, and its signboard has been removed from the space it occupied in Jurong.

According to the Chinese daily, authorities found that the eggs used by the company were contaminated with Salmonella enteritidis, which can be caused by improper food handling.

A probe also found that there were expired food items in the kitchen, and that the company did not keep temperature records for its freezers and chillers.