吃了一块冰箱里的瑞士卷，老人一直发烧，不幸去世，夏天要更重视这个“冰箱杀手”

Core Viewpoint - The article discusses the dangers of Listeria monocytogenes, commonly known as Listeria, particularly in relation to food safety and its impact on vulnerable populations such as the elderly and pregnant women [6][10][11]. Group 1: Listeria Infection Cases - A case is highlighted where a 67-year-old man died after contracting Listeria from a Swiss roll, emphasizing the severe consequences of such infections [1]. - Previous reports indicate that elderly individuals have also faced similar risks after consuming refrigerated leftovers, with varying outcomes from recovery to fatalities [3]. Group 2: Characteristics of Listeria - Listeria is often referred to as the "fridge killer" due to its ability to thrive in refrigerated environments, surviving temperatures as low as -1.5°C [6][8]. - The bacterium can grow and reproduce within host cells, evading the immune system and potentially spreading to various organs [8][10]. Group 3: Symptoms and Vulnerable Populations - Symptoms of Listeria infection can range from mild gastrointestinal issues to severe conditions like meningitis and sepsis, particularly in individuals with weakened immune systems [11]. - Pregnant women are at heightened risk, as Listeria can lead to miscarriage or severe illness in newborns [11][13]. Group 4: Food Safety and Listeria Outbreaks - Historical outbreaks linked to Listeria have involved contaminated ready-to-eat foods such as deli meats and melons, resulting in significant fatalities [15][17]. - A recent outbreak in the U.S. was associated with ready-to-eat sandwiches, highlighting ongoing food safety concerns [17]. Group 5: Refrigerator Temperature Management - Research indicates that many households do not maintain the recommended refrigerator temperature of 4°C or below, which is crucial for preventing Listeria growth [20][22]. - Specific recommendations include storing ready-to-eat meats on lower shelves and regularly checking refrigerator temperatures to ensure food safety [22][23].