*Table includes all pathogens for which a positive result was detected; it does not include other testing performed for which there were no positive results (e.g., respiratory and/or gastrointestinal panels, other viral testing). Other infections may have been present, but testing was not performed or results were inconclusive. Most respiratory and GI specimens were tested as part of a multiplex PCR panel, but panels used by clinical laboratory varied. All testing was performed at the discretion of treating clinicians. † Bacterial pathogens were isolated on culture from a normally sterile site such as blood or joint fluid. Testing for viral pathogens was conducted using real-time PCR or quantitative real-time PCR testing, or by serologic assay to detect recent viral antibodies (e.g., IgM). ‡Staphylococcus hominis, Corynebacterium, and Moraxella non-liquefaciens may reflect contamination of specimen collection and not necessarily infection.