PEI Weekly Influenza Summary 2018-2019 Season

Week 15 - Apr. 7 - Apr. 13, 2019

Summary

  • There was localized flu activity in PEI during Week 15.
  • Our seasonal total is 269 lab-confirmed cases (213 A/pH1N1, 39 A/H3, and 17 A/unsubtyped).
  • The median age of cases to date is 48 years; 52% of cases are female.
  • Across Canada in week 14 (Mar. 31-Apr. 6), flu activity continued in most regions, with a second, smaller wave of mostly A(H3N2) being observed.  Nationally, while detections of A/H3 have been increasing since mid-January, A/pH1N1 remains the predominant subtype to date this season.

 

Epidemiological curve of laboratory data

There was localized flu activity in PEI during Week 15.  Lab-confirmed influenza tests are just an indication of greater influenza activity, as many individuals with influenza do not seek medical attention.

Up-to-date Weekly Summary count of lab-confirmed influenza cases in PEI 2018-19

 

Positive influenza test results, current week, and cumulative 2018-19 season

Lab-confirmed cases Current Week (15) Cumulative 2018-2019
Influenza A                 5                  269
          A/pH1N1                 0                  213
          A/H3                 0                   39
          A/unsubtyped                 5                   17
Influenza B                 0                    0
Total Influenza                 5                  269

 

Respiratory outbreaks, current week, and cumulative 2018-19 season

Respiratory Outbreaks Current Week (15) Cumulative 2018-2019
Influenza A                1                   8
          A/pH1N1                0                   1
          A/H3                0                   3
          A/unsubtyped                1                   4
Influenza B                0                   0
ILI1                0                   5
Total Outbreaks                1                  13

 

1 ILI: Influenza like illness

Severe outcome surveillance, current week, and cumulative 2018-19 season

Severe Outcome Current Week (15) Cumulative 2018-2019
Hospitalizations1                  3                   119
ICU                  1                    12
Deaths2                  1                     8

1Hospitalization data is gathered through infection prevention and control practitioners at each Island hospital.  Data includes ICU cases.

2 Deaths include individuals with a positive influenza test result.  Influenza may not have been the major contributing cause of death.

 

Definitions (based on national Fluwatch definitions)

Activity levels:  
  1. No activity:  no lab-confirmed influenza detections in the reporting week, however, sporadically occurring ILI may be reported
  2. Sporadic:  sporadically occurring ILI and lab-confirmed influenza detection(s) with no outbreaks detected within the influenza surveillance region
  3. Localized:  evidence of increased ILI; lab-confirmed influenza detection(s); outbreaks in 1 county only
  4. Widespread:  evidence of increased ILI; lab-confirmed influenza detection(s); outbreaks in more than 1 county

Outbreaks:

  1. Hospitals and Residential institutions:  2 or more cases of ILI occurring within a 7 day period, with at least 1 lab- confirmed case
  2. Schools, Workplaces and other:  absenteeism greater than 10% higher than expected which is most likely due to ILI

 

Links

Fluwatch - Public Health Agency of Canada

 

PEI Influenza Summary 2017-2018

PEI Influenza Summary 2016-2017

PEI Influenza Summary 2015-2016

PEI Influenza Summary 2014-2015

 

 

Published date: 
April 16, 2019
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Phone: 902-368-6414
Fax: 902-368-4121

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