 Currently, clinicians approach to post-operative antibiotic prophylaxis in patients undergoing tube thoracostomy associated with thoracic and cardio-thoracic surgery varies widely. While reducing the infectious complications of thoracic surgery is an important goal, it is also important to reduce the use of unnecessary antibiotics. As there is equipoise on the benefit of extended antibiotic prophylaxis for tube thoracostomy, our study will examine two prevailing clinical practices and attempt to determine if one leads to better patient outcomes. 