An elderly man with influenza acquires a case of pneumonia. Grampositive cocci isolated from his sputum give betahemolysis on blood agar; the infection is very difficult to treat. Later, it is shown that the man shared a room with a patient with a bone infection. Isolates from both infections were the same.
a. What is the probable species?
b. Justify your answer.
c. What treatment will be necessary?