Core Viewpoint - The recent news regarding Listeria infection from consuming frozen meat has raised public awareness about the risks associated with food safety, particularly in summer when refrigerator usage increases [1] Group 1: Characteristics of Listeria - Listeria monocytogenes is a highly resilient foodborne pathogen known for its ability to survive in cold temperatures, including -20°C, making refrigerators a suitable environment for its growth [2] - It can thrive in dry and high-salt conditions and is commonly found in soil, water, decaying vegetation, and animal feces, leading to potential contamination in the food supply chain [2] Group 2: Health Risks Associated with Listeria - Infection can lead to severe health issues such as meningitis and encephalitis, particularly affecting vulnerable populations like the elderly, pregnant women, and immunocompromised individuals [3] - Pregnant women face significantly higher risks, including miscarriage, stillbirth, and neonatal sepsis due to Listeria's ability to cross the placental barrier [3] Group 3: Prevention Measures - To prevent Listeria infection, it is crucial to maintain refrigerator temperatures below 4°C for the cooling compartment and -18°C for the freezing compartment, along with regular cleaning [4] - It is recommended to separate raw and cooked foods in the refrigerator and adhere to the "74°C heating rule" to ensure thorough cooking of potentially contaminated foods [4] - High-risk groups should avoid consuming unpasteurized soft cheeses and undercooked ready-to-eat meats, and seek medical attention if symptoms arise [5]

Core Insights - The article discusses the risks associated with consuming fruits stored in refrigerators during summer, particularly focusing on Listeria monocytogenes, which poses a significant threat to vulnerable populations such as pregnant women, the elderly, and young children [3][4]. Group 1: Food Safety Risks - Listeria monocytogenes is a major concern for pregnant women, as it can lead to severe health consequences [3]. - The bacterium is resilient in low-temperature environments, making refrigerated foods a potential source of infection [3]. - Fruits and vegetables can carry Listeria due to contact with contaminated water and soil during growth [3]. Group 2: High-Risk Foods - Certain foods, including cold dishes, unpackaged cooked meats, and some frozen products from small manufacturers, are identified as high-risk for Listeria contamination [3]. - The summer and autumn seasons are particularly prone to foodborne illnesses, with the World Health Organization reporting 420,000 deaths annually from such diseases [4]. Group 3: Prevention Measures - Key food safety practices include maintaining cleanliness, using safe water and ingredients, separating raw and cooked foods, cooking thoroughly, and keeping food at safe temperatures [5]. - It is recommended to wash fruits thoroughly with running water and to consume whole fruits rather than pre-cut varieties to minimize risk [8]. - For vulnerable groups, it is advised to avoid high-risk foods and ensure proper food handling and storage practices [3][8].

炎炎夏日，许多人的冰箱中存放着西瓜、哈密瓜、冰激凌等美食。但是如果家里有老人、孕妇或免疫系统较弱的人，得小心"冰箱杀手"——李斯特 菌。 李斯特菌在夏天尤为常见，许多感染事件的发生，都是因为人们吃了被李斯特菌污染的冷藏即食食品，例如奶制品、熟食肉类、沙拉、三明治和水 果。 感染李斯特菌会出现什么症状？日常生活中该如何避免感染？ 01 感染李斯特菌 会出现什么症状？ 冰箱的冷藏温度通常在0℃到4℃之间，可以阻止大部分食源性致病细菌的生长，但是，这样的温度对李斯特菌无效，它们能在低至-1.5℃的环境中生 存和生长。在冰箱的冷藏室里，随着时间的推移，少量的李斯特菌就会生长到危险的污染水平。 从摄入李斯特菌到发病，有些人会有一段很长的潜伏期，通常可达三周，有的甚至潜伏2个多月。较长的潜伏期也让人们很难确定真正引起感染的食 物来源。 当人体的免疫系统较弱时，李斯特菌扩散到肠道以外的组织和器官，就可能出现头痛、发烧、肌肉酸痛、颈部僵硬、意识模糊、失去平衡和抽搐等症 状。在怀孕期间，女性的免疫系统会发生变化，孕妇因此更容易感染李斯特菌。虽然孕妇感染后本人可能只有轻微症状，但细菌会进入胎盘并感染未出生 的胎儿，从而引起早产或 ...

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].

美国多州报告李斯特菌感染病例！ 美国疾病控制和预防中心（CDC）发布公报称，美国多个州暴发与能量补充饮品相关的李斯特菌感染。截至目前，已有38人 感染，其中12人已死亡。 CDC警告称，李斯特菌暴发与长期护理机构分发的能量补充饮品有关。CDC已发布关于多州 暴 发李斯特菌感染的食品安全 警报，受影响的能量补充饮品品牌Lyons ReadyCare和Sysco已宣布召回所有在保质期内的产品。 据了解，Sysco是全球最大的食品及相关产品分销商之一，该公司在纽约证券交易所上市，目前市值为360亿美元。Sysco表 示，Lyons Magnus提供了与疫情有关的Sysco Imperial和Lyons ReadyCare补充饮品。Sysco正在立即从其库存中删除所有召回 的物品，通知可能涉及召回的下游客户，并停止生产来自该工厂的所有产品。 另外，值得关注的是，位于非洲的刚果（金）出现了一种原因不明的疾病，已导致50多人死亡。据报道，在大多数病例中， 出现症状和死亡之间的间隔时间在48小时内，其病死率高达12.49%。 美国发生李斯特菌疫情 美国疾病控制和预防中心（CDC）当地时间24日警告称，李斯特菌疫情与长期护理 ...