The Food and Drug Administration says it found traces of listeria at a Kellogg Co. plant in Augusta, Ga. during an inspection earlier this year.
In a letter released Tuesday, regulators say that the pathogen was found in several spots along the production line that come in direct contact with food. The FDA also noted other problems at the plant such as insects near areas where food is located.
Kellogg was not immediately available to discuss the letter.
Listeria is an organism that can cause serious and sometimes fatal infections in young children, elderly people and others with weakened immune systems. Symptoms include high fever, severe headache, stiffness, nausea, abdominal pain and diarrhea.
The company is already struggling to recover from massive recalls of food products last year.