Listeria monocytogenes is not heat-resistant, 60 ~ 70 ℃ can be killed after 5 ~ 20 minutes. 70% alcohol for 5 minutes, 2.5% phenol can also kill. Listeria monocytogenes is a gram-positive aerobic or partially anaerobic, no pods, no spores rule of short rods. The bacterium is more tolerant of the external environment, in 5 ~ 45 ℃ can grow, 60 ~ 70 ℃ by 5 ~ 20 minutes to kill. In 5 ℃ low temperature conditions can still grow is the characteristics of the bacteria. The bacterium is widely distributed in the environment. Listeria monocytogenes is a foodborne disease, which is mainly contracted through the ingestion of food contaminated with large amounts of Listeria monocytogenes. Infection in pregnant women can be transmitted vertically from mother to fetus or newborn. Early diagnosis and early use of antibiotics such as penicillin under medical supervision can reduce the incidence of poor prognosis.