在素食沙拉米中Listeria monocytogenes的生长潜力
Signe Magnussen1, Emma Bergenkvist1, Karin Söderqvist1
1Department of Animal Biosciences, Swedish University of Agricultural Sciences, Box 7023, 750 07 Uppsala, Sweden.
Journal of food protection
|May 10, 2025
概括
准备好吃的素食美食切片可以支持Listeria monocytogenes的生长. 一项挑战测试显示,纯素沙利米中的细菌数量显著增加,突出了植物性产品的食品安全问题.
科学领域:
- 食品微生物学 食品微生物学
- 食品安全 食品安全
- 植物性食品 植物性食品
背景情况:
- 对植物性产品的需求不断增加,需要进行安全评估.
- 人们担心病原体的生长,比如Listeria monocytogenes,在准备好吃的素食美食片中.
- 特定的产品特性 (pH值高,水活性,缺乏抗微生物药物) 可能会促进细菌的增殖.
研究的目的:
- 为了评估Listeria monocytogenes在纯素香肠中的生长潜力.
- 为了评估商用植物性美食片的微生物安全性.
- 确定有助于纯素产品潜在病原体生长的内在因素.
主要方法:
- 一个挑战测试是在用Listeria monocytogenes接种的素食沙利米上进行的.
- 样品在8°C下保存大约30天,模拟了保质期条件.
- 进行了细菌计数,pH,水活性,总细菌计数和微生物群体分析 (MALDI-TOF-MS).
主要成果:
- 李斯特菌单细胞菌表现出显著的生长,其生长潜力 (δ) 为4.4 log10 cfu/g.
- 最初的注射水平约为2.4 log10 cfu/g,增加到最多6.8 log10 cfu/g.
- 发现的流行腐烂细菌包括Carnobacterium和Leuconostoc物种.
结论:
- 经过测试的素食沙利米产品有可能支持Listeria monocytogenes的生长.
- 目前可用的某些植物性甜点切片可能会构成食品安全风险.
- 需要进一步的研究,以确保植物性即食产品的微生物安全性.
相关概念视频
Microorganisms in Agriculture and Food industry
Microorganisms play a crucial role in agriculture and the food industry, contributing to soil fertility, crop protection, and food production. Their functions range from nitrogen fixation and biopesticide production to fermentation and food preservation, making them indispensable to sustainable farming and food safety.Role in AgricultureNitrogen-fixing bacteria, such as Rhizobium (symbiotic) and Azotobacter (free-living), convert atmospheric nitrogen into ammonia through biological nitrogen...
Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
Microbes in Beverage Production
Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
Microbes in the Production of Fermented Foods
Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
Microbial Spoilage of Food
Microbial food spoilage refers to the degradation of food quality resulting from the metabolic activity of microorganisms such as bacteria, yeasts, and molds. These microbes proliferate on various food substrates depending on factors such as moisture content, nutrient availability, and storage conditions, leading to undesirable sensory and structural changes.Bacteria are primary agents of spoilage in high-moisture, nutrient-dense foods like meat, milk, and vegetables. Microbial spoilage occurs...
Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...


