Stenotrophomonas maltophiliais a nonfermenting Gram-negative rod that is ubiquitous in nature (predominantly occurring in aquatic environments and on plants). Biochemically, it iscatalase positive and oxidase negative, and it produces acid frommaltose (hence the name“maltophilia”). Due to its chargedcell wall surface and biofilm production, it may attach to and survive on abiotic surfaces in clinical settings (eg, central venouscatheters, disinfectant and hand-washing solutions, solutions for hemodialysis, endoscopes, inspiration/expiration circuits of ventilators, nebulizers, tap water, and showerheads). Health Services Research and Managerial Epidemiology Volume 6: 1-9ªThe Author(s) 2019