Fresh cheese usually has high pH and this condition promotes growth of pathogenic microorganisms, especially microorganisms such as Listeria monocytogenes, that survive at refrigerated storage for long time
and at hostile conditions. Listeriosis stemming from L. monocytogenes is a bacterial infection associated with dairy products.
The Center of Disease Control and Prevention (CDC) of the United States of America has reported around 2500 listeriosis cases every year in US with an estimated mortality associated of 20%
(Mead et al., 1999).