An elderly man with influenza acquires a case of pneumonia. Gram-positive cocci isolated from his sputum give beta-hemolysis on blood agar. The infection is very difficult to treat. Later, it is shown...

Extracted text: An elderly man with influenza acquires a case of pneumonia. Gram-positive cocci isolated from his sputum give beta-hemolysis on blood agar. The infection is very difficult to treat. Later, it is shown that the man shared the room with a patient with bone infection. Isolates from both infections were the same. a. Describe 2 biochemical tests that can be used for the definitive diagnosis. b. Describe 2 virulence factors of this pathogen and implicate them in diseases.