A 37 yo man is admitted to hospital due to SOB, fever and cyanosis. Recently he has had a productive cough and noticed blood tinged sputum. He was previously well. He drinks occasional wine, beer nad cocktails and denies binge drinking. Tenmp is 101, pulse 74 and resp 20. Physical exam shows dullness to percussion and decreased breath sound and crackles in right base. Labs show WBC 13,000, leukocyte differential 75 % neutrophil, 20 % lymphocyce, 3 % monoctes and 2% band forms. Non fasting serum glucose is 100 mg/dl. CXR shows consoldiation of right lower lobe. 1. What is likely pathology? 2. What is most likely causal organism and why? 3. What is recomended treatment?

The main function of the respiratory system is gas exchange (O2 and CO2). Ventilation is the movement of air through the respiratory tract into (inspiration) and out of (expiration) the respiratory zone (lungs).