Steriwave ICU Pilot Study

This is a single-center, non-blinded, prospective, pilot study enrolling patients admitted to the critical care unit at Royal Columbian Hospital. This study investigates the effects of universal nasal decolonization using antimicrobial photodynamic therapy (aPDT) on the prevention of hospital-acquired pneumonia (HAP), ventilator-acquired pneumonia (VAP), and hospital-acquired bloodstream infection (BSI) in this patient population. Main Objectives include: * To determine whether a large, multi-center RCT of this protocol is feasible * To determine baseline rates of VAP, HAP, and ICU-acquired BSI * To gather preliminary efficacy data regarding VAP, HAP, and ICU-acquired BSI prevention using universal aPDT nasal decolonization * To gather preliminary microbiological data on the effect of universal aPDT procedures on nasal carriage of various microoganisms in ICU patients.