The people arrested included pig farmers in Henan province, the country’s main pig producing area, as well as a further eight people in Nanjing city, where a slaughterhouse was found to have handled the tainted meat.
China’s top meat processor Henan Shuanghui Investment & Development Co was named by state television as one of the main companies that had sold the contaminated pork. It has already shut down the processor affected by the contamination.
The state news agency Xinhua said the government was investigating over 1,300 pig farms and 130 feed and veterinary drug stores. At least six officials and workers had been suspended or fired at local animal quarantine stations.
It is thought that the pigs were fed the additives to produce leaner meat.