Stenotrophomonas maltophilia is an aerobic, non-fermenting, Gram-negative bacillus recognized by the World Health Organization as one of the leading multi-drug resistant nosocomial pathogens worldwide. The Investigators aim to examine differences in clinical outcomes and failure rates between standard and alternative treatment strategies such as minocycline (or moxifloxacin, ciprofloxacin, ceftazidime) alone or in combination with TMP-SMX, alternative TMP-SMX dosing regimens, or variations in durations of therapy for the treatment of S. maltophilia infections within Methodist Health System (MHS).