By using Staphylococcus aureus as an illustration, this solution gives a detailed explanation of how a person's innate and adaptive immune system would fight off this potentially life-threatening infection. This comprises details of recognition by pattern recognition receptors, macrophages and dendritic cells, the significant cytokines and other soluble factors and the function of lymphocytes in the immune response. It as well describes when should person seek medical care and describe diagnosis treatment for this infection.