标题：Study of the population dynamics of Listeria monocytogenes and Pseudomonas fluorescens in buffalo-milk mozzarella cheese by means of challenge testing
摘要：Campania buffalo mozzarella is a greatly appreciated cheese in Italy and worldwide. From a microbiological standpoint, it is a highly perishable food and potentially at risk of contamination by pathogens such as Listeria monocytogenes ( L. monocytogenes ). The present paper reports the results of a challenge test carried out with the aim to assess the population dynamics of L. monocytogenes , alone and in the presence of Pseudomonas fluorescens ( Ps. fluorescens ), in buffalo mozzarella. For this purpose buffalo mozzarella samples were contaminated with L. monocytogenes alone or combined with Ps. fluorescens . In samples wherein L. monocytogenes was inoculated alone, the bacterial load remained unchanged. By contrast, in samples contaminated with L. monocytogenes and Ps. fluorescens , the growth of L. monocytogenes was increased.
