Adaptive Phage Therapeutics, Inc. (APT) is a clinical-stage company founded to provide an effective therapeutic response to the global rise of multi-drug resistant (MDR) pathogenic bacteria. APT's core asset is a large and continually expanding phage library (PhageBank) deployed with a companion diagnostic to achieve rapid response and cost-effective therapy for otherwise recalcitrant bacterial infections. The technology was developed by the biodefense program of U.S. Dept of Defense. APT acquired the world-wide exclusive commercial rights in 2017. Under the FDA emergency Investigational New Drug (eIND) allowance, PhageBank therapy has been used to treat approximately 20 critically ill patients in which standard-of-care antibiotics has failed.