# Commission Implementing Decision (EU) 2018/945 of 22 June 2018 on the communicable diseases and related special health issues to be covered by epidemiological surveillance as well as relevant case definitions (Text with EEA relevance), Division 4.1: GENERAL CASE DEFINITION OF NOSOCOMIAL INFECTION (OR ‘HEALTHCARE-ASSOCIATED INFECTION (HAI)’)

Extent: E+W+S+N.I.

A nosocomial infection associated to the current hospital stay is defined as infection that matches one of the case definitions AND
the onset of symptoms was on day 3 or later (day of admission = day 1) of the current hospital admission OR
the patient underwent surgery on day 1 or day 2 and develops symptoms of a Surgical Site Infection before day 3 OR
an invasive device was placed on day 1 or day 2 resulting in an HAI before day 3
A nosocomial infection associated to a previous hospital stay is defined as an infection that matches one of the case definitions
AND
the patient presents with an infection but has been readmitted less than 48 hours after a previous admission to an acute care hospital
OR
the patient has been admitted with an infection that meets the case definition of a Surgical Site Infection i.e. the SSI occurred within 30 days of the operation (or in the case of surgery involving an implant was a deep or organ/space SSI that developed within 90 days of the operation) and the patient either has symptoms that meet the case definition and/or is on antimicrobial treatment for that infection
OR
the patient has been admitted (or develops symptoms within 2 days) with Clostridium difficile infection less than 28 days from a previous discharge from an acute care hospital.

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Source: https://www.legislation.gov.uk/eudn/2018/945/annex/II/division/4/division/4.1 (the official version)
Page: https://openlegislation.uk/eu-decision-2018-945/annex-II/division-4/division-4.1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.