Listeria monocytogenesListeriosisListeriaMeningitis, ListeriaFood MicrobiologyHemolysin ProteinsBacterial ProteinsVirulencePeptide Termination FactorsCheeseHeat-Shock ProteinsBacterial ToxinsColony Count, MicrobialNisinMeat ProductsFood-Processing IndustryMacrophagesSpleenGene Expression Regulation, BacterialDNA, BacterialBacteriocinsFood PreservationMolecular Sequence DataFood ContaminationFoodborne DiseasesMice, Inbred C57BLMice, Inbred BALB CFood PreservativesCulture MediaMicrobial ViabilityGenes, BacterialVirulence FactorsSerotypingImmunity, InnateFood HandlingMilkPhagosomesImmunity, CellularLethal Dose 50Bacterial Adhesion