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Population, Public and Aboriginal Health Edmonton Zone Communicable Disease Control Edmonton Zone Case and Outbreak Definitions EARLY RECOGNITION of suspected outbreaks is important. Facility sites (Long Term Care, Home Living and Supportive Living) should conduct ongoing surveillance and use the following definitions, as recommended by the Edmonton Zone Medical Officer of Health (MOH), for early identification of unusual clusters of influenza like or gastrointestinal illness and/or outbreaks. ILI Case Definition ILI Outbreak Definition Acute onset of NEW cough or change in an existing cough PLUS one or more of the following: fever, sore throat, arthralgia (joint pain) myalgia (muscle aches), prostration, (severe exhaustion) 2 or more cases of ILI within a 7-day period, with a common epidemiological link (e.g. same location or same care giver, and evidence of healthcare associated transmission within the unit or facility) of which at least one is a laboratory confirmed case. NOTE: Older adults have a lower basal body temperature therefore fever may be present when the temperature is greater than 1.5° Celsius above baseline. NOTE: Even a single case of ILI is reportable to Public Health for enhanced monitoring, surveillance and recommendations. GI Case Definition GI Outbreak Definition At lease ONE of the following criteria must be met and not be attributed to another cause (e.g.Clostridium difficile diarrhea, medication, laxative, diet or prior medical condition etc): 2 or more cases (with initial onset within one 48 hour period) of gastrointestinal (GI) illness with a common epidemiological link (e.g. same location or same care giver, and evidence of healthcare associated transmission within the facility) ∗Two or more episodes of diarrhea (i.e. loose or watery stools) in a 24 hour period, above what is normally expected for that individual OR ∗Two or more episodes of vomiting in a 24 hour period OR ∗One or more episodes of vomiting AND diarrhea in a 24 hour period OR ∗Positive stool culture of a known enteric pathogen AND at least one symptom compatible with a GI infection i.e. nausea, vomiting, diarrhea, abdominal pain or tenderness OR ∗One episode of bloody diarrhea In order to initiate an outbreak investigation promptly, REPORT new suspect cases of ILI or GI according to definitions described above to the Edmonton Zone office of the Medical Officer of Health (MOH): • • During business hours, Monday to Friday between 0830h-1700h pager 780-445-7226 After-hours/weekends/statutory holidays, call 780-433-3940 Alberta Health Services Edmonton Zone Last Modified August 2015