Symptoms | Listeria | CDC
www.cdc.gov › listeria › symptomsMay 03, 2022 · Invasive listeriosis happens when Listeria have spread beyond the intestines. Symptoms of invasive illness usually start within 2 weeks after eating food contaminated with Listeria. Symptoms of invasive illness People who are pregnant Symptoms typically include Fever Flu-like symptoms, such as muscle aches and fatigue People who are not pregnant