A listeria outbreak linked with ready-to-eat meat and poultry products from Yu Shang Food Inc. has caused 11 illnesses in four states, with nine hospitalizations and the death of an infant, according to the US Centers for Disease Control and Prevention.

Officials have been forced to recall tens of thousands of kilograms worth of ready-to-eat meat following a deadly outbreak that has left one dead and several others in hospital

The infant killed was a twin whose sibling also died, but whose death could not be linked to listeria. Their pregnant mother was also sick, but recovered, the CDC said.