Radiographic pneumonia

A 68 year-old immunocompromised patient presents with radiographic pneumonia. She had a recent travel history and was back 8 days ago. The patient is diagnosed with an infectious disease and the doctor suggests that transmission was most likely via aerosolised water droplets from an air conditioning unit during the patients recent travel. Sputum produced by the patient with this disease may not have many white blood cells. Which of the following is the confirmatory method for the patients diagnosis?

A. Chocolate agar

B. Thayer-Martin agar

C. MacConkey’s agar

D. Buffered charcoal yeast extract agar

E. Border-Gengou agar

What is the Basic Science Rationale?    What is the Clinical Correlate?