# 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: GI-GE: Gastroenteritis (excl. CDI)

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

Gastroenteritis must meet at least one of the following criteria:
Patient has an acute onset of diarrhea (liquid stools for more than 12 hours) with or without vomiting or fever (> 38 °C) and no likely noninfectious cause (for example, diagnostic tests, therapeutic regimen other than antimicrobial agents, acute exacerbation of a chronic condition, or psychologic stress)
Patient has at least 2 of the following signs or symptoms with no other recognized cause: nausea, vomiting, abdominal pain, fever (> 38 °C), or headache
AND at least 1 of the following:
an enteric pathogen is cultured from stool or rectal swab
an enteric pathogen is detected by routine or electron microscopy
an enteric pathogen is detected by antigen or antibody assay on blood or feces
evidence of an enteric pathogen is detected by cytopathic changes in tissue culture (toxin assay)
diagnostic single antibody titre (IgM) or 4-fold increase in paired sera (IgG) for pathogen

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Source: https://www.legislation.gov.uk/eudn/2018/945/annex/II/division/4/division/4.1/division/4.1.7/division/2 (the official version)
Page: https://openlegislation.uk/eu-decision-2018-945/annex-II/division-4/division-4.1/division-4.1.7/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.