Paneer is a fresh, soft, unripened cheese, falls under the category of ready to eat product. From 2010 to 2015, because of consumption of soft cheese, several multistate outbreaks of Listeria monocytogenes happened in the USA. In the meantime, recalls of soft cheese happened in Australia and Canada due to association of soft cheese with L. monocytogenes. Therefore, this research was undertaken to study the growth potential of L. monocytogenes in this product by challenge testing with three different contamination modes and evaluate the effectiveness of different preservation techniques in inhibiting the growth of L. monocytogenes in this product. Results showed that paneer cheese supports the growth of L. monocytogenes to more than 2 logs (100 cfu/g) during the shelf life. It was found that the none of the preservation techniques evaluated inhibited the growth of L. monocytogenes to less than 1 log cycle during the shelf life. This study provides the scientific basis of assessing the growth potential of L. monocytogenes by challenge testing and mandates the implementation of regulatory guidelines while manufacturing, distribution, storage and importation of this product with the recommendation of use of hurdle technologies to inhibit the growth of L. monocytogenes in this product.

Paneer是一种新鲜，柔软，未成熟的奶酪，属于即食产品类别。从2010年到2015年，由于食用软奶酪，美国发生了多起李斯特菌多州暴发。同时，由于软奶酪与单核细胞增生李斯特氏菌的关联，软奶酪的召回在澳大利亚和加拿大发生。因此，本研究旨在通过三种不同污染模式的挑战性测试来研究单核细胞增生李斯特氏菌在该产品中的生长潜力，并评估不同保存技术在抑制该产品中单核细胞增生李斯特氏菌生长的有效性。结果显示该窗格奶酪在货架期内可将单核细胞增生李斯特氏菌的生长速度提高到2 log（100 cfu / g）以上。发现在保存期限内，所评估的所有保存技术均未将单核细胞增生李斯特氏菌的生长抑制到少于1个对数周期。这项研究为通过挑战试验评估单核细胞增生李斯特氏菌的生长潜力提供了科学依据，并要求在制造，分销，储存和进口该产品的过程中执行监管准则，并建议使用跨栏技术来抑制L. L生长。本产品中的单核细胞增生病。