African swine fever (ASF) virus has been detected in some protein powders made using pork blood and manufactured by a Tianjin-based company, the General Administration of Customs said in a statement on Tuesday.
The raw material for the contaminated protein products, mainly used for animal feed, came from 12 slaughterhouses in Tianjin, Reuters reported.
China attempted to slow the spread of this disease by banning the use of food waste and pig blood as a raw material in the production of feed for pigs in September.
The protein products were created by a subsidiary of Tianjin Baodi Agri & Tech Co Ltd., which has operations ranging from hog breeding and cooked meat production to biochemical production, Reuters reported.
The customs administration has issued an alert, valid for six months, to strengthen ASF virus testing in exports of such products and urged farms in Hong Kong and Macau to tighten their checks on animal feed imports.
China has already reported more than 90 cases of ASF, which is deadly for pigs but does not harm humans, since it was first detected in the country in early August.