A 23 year old man is brought o ED after being in a near fatal fire. Over next several days he develp pneumonia nad progressive SOB and is intubated. Gram stain of hte sputum shows a gram negative encapsulated, oxidase positivve aerobic rod. Antibiotic susceptibility tests reveal resitance to aminoglycosides. 1. What is the causative organism? 2. What mechanism makes this organism resistant to this antibiotic?

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).