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New Resource--Vector-Borne Diseases: 2016 Summary Report, Public Health Ontario

Public Health Ontario has released its new annual report — Vector-Borne Diseases: 2016 Summary Report , which summarizes the 2016 data on the vectors that transmit West Nile virus, eastern equine encephalitis virus (EEEV) and Lyme disease in Ontario.
Key findings:

  • There was an increase in West Nile virus positive mosquito pools over the last two years – with 211 positive pools identified in 2016.
  • While human data are not included in this report, it was noted that Ontario had the first ever human case of EEEV reported in Canada.
  • There was an increase in the number of blacklegged ticks submitted to PHO from 1,903 in 2015 to 2,041 in 2016.

 Please note that human data are not included in this report. However this information is still available on PHO’s website through the Infectious Diseases Query tool ( and Reportable Disease Trends in Ontario (
For detailed information on specific trends, please read the full report ( or email