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3) after introduction of PCR technology. There was no significant difference in length of stay postintervention ( = .12). Patients discharged directly from the ED had fewer return visits ( = .02) and received fewer repeat blood cultures ( = .04), and antibiotics were administered on fewer occasions after return ( = .04) postintroduction of PCR technology. With the addition of PCR technology, patients with blood cultures positive for nonpathogenic bacteria received less antibiotics, fewer repeat blood cultures, and fewer repeat E