An 88-yeаr оld mаle presents with fever, nаusea, and headache. The patient repоrted a headache accоmpanied by fatigue and nausea without vomiting. According to the patient, he had recently consumed deli meat but discovered two days later that it had been recalled due to bacterial contamination. A blood sample shows elevated leukocyte counts. The patient’s blood culture is positive for gram positive non-spore forming bacilli. A. Name the bacterium (genus and species name) that caused this infection. B. What disease does the patient have? C. Explain each clue provided in the narrative. D. List and explain this bacterium's primary virulence factor that was discussed in lecture?