Let's start with Yersinia, which can cause many diseases. The most common is enterocolitis, mainly manifested as abdominal pain, diarrhea, fever and other symptoms, or symptoms similar to appendicitis, which can occasionally cause intestinal ulcers and perforation. Yersinia can also cause erythema multiforme, erythema nodosum and arthritis. Severe cases can cause sepsis, meningitis, lung abscess, liver abscess and osteomyelitis.
Listeria can cause diseases in newborns, pregnant women, the elderly and people with decreased or defective immune function. It can cause neonatal sepsis and meningitis, leading to respiratory or circulatory failure, and the mortality rate is as high as 100%. After infection, pregnant women will have symptoms similar to upper respiratory tract infection, such as chills, fever, headache, myalgia, joint pain, back pain and so on. It can also cause premature birth, stillbirth or neonatal meningitis and lead to its death. Adult infection can lead to septicemia, manifested as fever, myalgia, diarrhea and nausea. Infection with Listeria can also lead to central nervous system injury, meningitis, encephalitis, brain abscess, fever, headache, nausea, vomiting and hemiplegia. About 40% patients will also have respiratory failure, and the mortality rate is high. In addition, Listeria infection can also cause endocarditis, suppurative conjunctivitis, febrile enteritis, hepatitis, liver abscess, cholecystitis, spleen abscess, arthritis, osteomyelitis and so on.
Food contaminated by Yersinia and Listeria can kill bacteria through normal cooking.