West Nile virus Surveillance in Alberta

Read the current and past surveillance statistics of West Nile virus cases in Alberta.

2018 West Nile virus cases

Forty-nine cases of West Nile virus (WNV) have been reported so far this year in Alberta: 7 neurological, 37 non-neurological and 5 asymptomatic. WNV contributed to the death of one person this year.

Summary of cases 20032018

AHS Zone 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
North 4 1 0 0 4 0 0 0 0 1 0 0 0 0 0 0
Edmonton 22 0 0 0 8 0 0 0 0 0 1 0 0 0 0 0
Central 45 0 0 0 25 0 0 0 0 1 3 0 0 0 1 2
Calgary 37 0 2 4 38 0 1 1 0 1 1 0 0 2 2 7
South 167 0 8 36 245 1 1 0 0 6 16 0 0 3 4 40
Alberta Total 275 1 10 40 320 1 2 1 0 9 21 0 0 5 7 49

Surveillance degree day maps

WNV degree day maps are one tool that assist health professionals in Alberta in determining the risk of WNV in Alberta each year.

Past surveillance summary reports

Surveillance in Canada and United States