Which group of pathogens can multiply in refrigerated high risk food?

Psychrotrophic pathogens, particularly certain strains of Listeria monocytogenes, Yersinia enterocolitica, and some species of Salmonella, can multiply in refrigerated high-risk foods. These pathogens thrive at low temperatures, allowing them to grow in environments that would typically inhibit the growth of other bacteria. This makes it essential to monitor refrigeration practices and ensure food safety, especially for vulnerable populations.