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Table 1 Differences in HAI definitions (CDC/NHSN vs. HELICS/IPSE)

From: Concordance between European and US case definitions of healthcare-associated infections

Type of HAI or key term

CDC/NHSN definitions

HELICS/IPSE definitions

Bloodstream infection (BSI) / Laboratory-confirmed bloodstream Infection (LCBI)

·LCBI (Positive blood culture with recognized pathogen or 2 blood cultures with skin contaminant incl. clinical symptoms. Organism cultured from blood is not related to an infection at another site)

·BSI-A

(Positive blood culture with recognized pathogen or 2 blood culture with skin contaminant incl. clinical symptoms. Origin: “Catheter” (C), “Secondary to another site” (S) or “Unknown” (U))

·CSEP (Clinical sepsis in patients ≤ 1 year)

Catheter-related infection (CRI)

-*

·CRI 1 (Local central venous catheter (CVC)-related infection)

·CRI 2 (General CVC-related infection)

· CRI 3 (CVC-related BSI)

· CCO (Catheter colonisation)

Pneumonia (PNU/PN)

· PNU1 (Clinically defined pneumonia)

· PN 1 (Protected sample + quantitative culture)

· PNU2 (Pneumonia with specific laboratory findings)

· PN 2 (Non-protected sample + quantitative culture)

· PNU3 (Pneumonia in immunocompromised patients)

· PN 3 (Alternative microbiological criteria)

· PN 4 (Sputum bacteriology or non-quantitative endotracheal aspirate (ETA))

· PN 5 (No microbiological criterion (only clinical criteria))

Urinary tract infection (UTI)

· SUTI (Symptomatic UTI) †/‡

· UTI-A (Symptomatic, microbiologically confirmed)

· ASB (Asymptomatic bacteriuria) † /

·ABUTI (Asymptomatic bacteremic UTI) ‡

· UTI-B (Symptomatic , not microbiologically confirmed)

· OUTI (Other infections of the urinary tract) †/‡

· UTI-C (Asymptomatic bacteriuria)

ICU-acquired HAI

· No evidence that the infection was present or incubating at the time of admission to the ICU

· Infection occurred later than 48 hours after admission in the ICU

Ventilator-associated

· A device to assist or control respiration continuously through a tracheostomy or by endotracheal intubation was present within the 48-hour period before the onset of infection, inclusive of the weaning period

· An invasive respiratory device was present (even intermittently) in the 48 hours preceding the onset of infection

  1. *, not applicable.
  2. †, until December 2008.
  3. ‡, since January 2009.