Measles & Rubella Weekly Monitoring Report: April 23 to April 29, 2017 (week 17)
- In Canada, 1 new case of measles was reported in week 17, 2017.
- Two provinces (Nova Scotia and Ontario) have active measles cases.
- A total of 39 cases of measles, and zero cases of rubella have been reported in Canada in 2017.
During epidemiological week 17, 2017, 1 new case of measles was reported in Canada, by Nova ScotiaFootnote 1. This case had rash onset during week 17, and was linked to an ongoing outbreak.
To date in 2017, 39 cases of measles have been reported in Canada. Two outbreaks have been confirmed – one that began in February and has since concluded, and the other is an ongoing outbreak that began in March and involved four provinces. One case from Ontario under investigation has an epidemiological link with a previously reported case that had a travel history to Pakistan.
No cases of rubella have been reported in 2017 (Figure 1). It has been 62 epidemiologic weeks since the last rubella case was reported (week 6, 2016).
Figure 1 - Text Description
|Epidemiological Week of Rash Onset, 2017||Number of confirmed measles cases reported||Number of confirmed rubella cases reported|
|Missing Rash Onset||0||0|
There are no reported active cases of rubella in Canada (Figure not shown).
Maps from previous weeks, including any retrospective updates, are available online in the Measles and rubella weekly surveillance maps feature.
Figure 2 - Text Description
|Health Region||Measles Cases||Rubella Cases|
|Eastern Regional Integrated Health Authority||0||0|
|Central Regional Integrated Health Authority||0||0|
|Western Regional Integrated Health Authority||0||0|
|Labrador-Grenfell Regional Integrated Health Authority||0||0|
|Prince Edward Island||0||0|
|South Shore District Health Authority||7||0|
|South West Nova District Health Authority||0||0|
|Annapolis Valley District Health Authority||0||0|
|Colchester East Hants Health Authority||0||0|
|Cumberland Health Authority||0||0|
|Pictou County Health Authority||0||0|
|Guysborough Antigonish Strait Health Authority||0||0|
|Cape Breton District Health Authority||0||0|
|Capital District Health Authority||0||0|
|Zone 1 (NB)||0||0|
|Zone 2 (NB)||0||0|
|Zone 3 (NB)||0||0|
|Zone 4 (NB)||0||0|
|Zone 5 (NB)||0||0|
|Zone 6 (NB)||0||0|
|Zone 7 (NB)||0||0|
|Québec et Chaudières-Appalaches||0||0|
|Montréal et Laval||0||0|
|Ontario Central East||0||0|
|Ontario Central West||0||0|
|Ontario North East||0||0|
|Ontario North West||0||0|
|Ontario South West||0||0|
|City of Toronto Health Unit||0||0|
|Winnipeg Regional Health Authority||0||0|
|Prairie Mountain Health||0||0|
|Interlake-Eastern Regional Health Authority||0||0|
|Northern Regional Health Authority||0||0|
To date in 2017, 24 measles cases have been genotyped and the genotypes are B3 (n=6) and D8 (n=18) (Figure 3). Genotype information is pending for 7 additional cases.
During epidemiological week 17, 2017, 1 new measles genotype result became available. The case was epidemiologically linked to an ongoing outbreak in Nova Scotia, and had a genotype D8 sequence identical to the index case which was imported from India.
Figure 3 - Text Description
|Epi week||B3||B3 - Harare||D4||D8||D8 - Taunton||D9||H1||Total|
The current global distribution of measles genotypes can be found on the WHO Measles Surveillance website.
For information regarding the interpretation and use of measles genotyping (including a discussion of genotypes and sequence variants), refer to Hiebert J and Severini A. Canada Communicable Disease Report. 2014; 40-12: 257- 260.
To date in 2017, no rubella cases have been genotyped.
- Footnote 1
Only cases with rash onset up to the indicated end date are included in this report. Any additional cases will be described in future reports.
- Footnote 2
Public Health Agency of Canada. Guidelines for the prevention and control of measles outbreaks in Canada. Canadian Communicable Disease Report. 2013. Vol. 39: Definitions: conclusion of an outbreak (p. 5).
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