Tyson Foods is recalling almost 4,500 tons of ready-to-eat chicken products after finding the products may be tainted with listeria bacteria.

The U.S. Department of Agriculture announced the recall Thursday after two consumers reported falling ill with listeriosis. Further investigation revealed one death besides the two listeriosis cases traced to pre-cooked chicken Tyson produced.

Listeriosis is a serious infection that primarily affects older adults, those with weakened immune systems, and pregnant women and their newborns.

It causes fever, muscle aches, headache, stiff neck, confusion, loss of balance and convulsions sometimes preceded by diarrhea or other gastrointestinal symptoms.

Getty Images