A total of 99.3% of Chinese regional cuisine samples have passed Centre for Food Safety tests, with two samples failing.

A Sichuan mala mandarin fish was found to contain veterinary drug residue metabolite of nitrofuran at a level of 0.0017ppm. As the level was low, adverse effects from normal consumption are unlikely, the centre said.

A chicken with chilli sample was contaminated with salmonella.

The centre has ordered the vendors to stop selling the items and is tracing the source. Warning letters will be issued.

Three hundred food samples from more than 140 retailers were taken for microbiological and chemical tests.