Since December, several manufacturers, including Swiss giant Nestle, have issued recalls of infant formula that could be contaminated with cereulide in more than 60 countries.

Cereulide is a toxin produced by some strains of the bacteria Bacillus cereus and can cause nausea, vomiting and diarrhoea.

Beijing has "directed all manufacturers to conduct cereulide testing", the State Administration for Market Regulation said in a statement.

Manufacturers are to be "strict" in accepting raw materials and quality control, it added.

The statement did not mention any specific Chinese companies.

But the recall has heaped scrutiny on Wuhan-headquartered Cabio Biotech, one of the world's largest producers of ARA -- a fatty acid used primarily in baby formula and food products.

Cereulide was discovered in ARA manufactured by Cabio Biotech.

Probes are underway in Switzerland and France after babies in those countries were thought to have been exposed after consuming contaminated milk.

China has not identified any case of cereulide poisoning caused by consumption of infant formula, the regulator said.

Cabio Biotech has yet to publicly comment on the situation, and has not responded to multiple requests for comment by AFP.

mya/reb/ami

Nestlé