LACTB and listeriosis: This trend in the resistance to β-lactamic is associated with the fact that they are antibiotics that are commonly used in the treatment of listeriosis and can be acquired or transferred antibiotic resistance genes that code for the development of mechanisms of resistance such as beta-lactamase or modification of the site to penicillin-binding protein 3 (PBP-3) in addition to the intracellular characteristic nature of Listeria spp.