Acquisition of Multidrug-ResistantSerratia marcescensby Critically Ill Patients Who Consumed Tap Water During Receipt of Oral Medication

Abstract
We describe an outbreak of multidrug-resistantSerratia marcescensinfection and colonization involving adults admitted to a surgical intensive care unit. Examination of the outbreak revealed epidemiological evidence that consumption of tap water from a contaminated faucet during receipt of oral medication was the mechanism ofS. marcescensacquisition.