“…Such agents have broad-spectrum activity, including activity against Clostridium difficile spores; however, copper resistance was described when copper was used in animal feed (223). Other innovative therapeutic avenues, which have not yet been tested against A. baumannii but have the potential for efficacy, include the use of bacteriophage treatment (590), improvement in host response via passive or active immunization (63,122,134,350), and modification of bacterial virulence by inhibition of quorum sensing (202,375), other bacterial secretion systems (17), or LPS biosynthesis (118). More broadly, deepening our understanding of the mechanisms of antimicrobial resistance gene transfer and the cellular responses (such as the SOS response) that lead to mutagenesis and eventual resistance (23,92,313) will provide unique targets that, when inhibited, may prevent the emergence and dissemination of resistance.…”