Measles & Rubella Weekly Monitoring Report – Week 14: March 31 to April 6, 2019
- In Canada, six new cases of measles and no new cases of rubella were reported in week 14, 2019.
- Currently, there are 10 activeFootnote 1 cases of measles in Canada.
- Thirty-nine (39) cases of measles and no cases of rubella have been reported in Canada in 2019. These cases were reported by Québec, British Columbia, the Northwest Territories, Ontario, and Alberta.
- Globally, there are large measles outbreaks which have affected a large number of countries. Canadians travelling outside of Canada are invited to consult the travel health notices for more information.
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During epidemiological week 14, 2019 six new confirmed cases of measles and no new cases of rubella were reported in CanadaFootnote 2. Four cases were reported by the province of British Columbia: all four were exposed in Canada to unknown sources and had onset of rash in epidemiological weeks 13 and 14. One case reported by the province of Québec had an unknown source of exposure in Canada and had an onset of rash in epidemiological week 13. One case reported by the province of Ontario acquired measles during travel to the United Kingdom and had a rash onset in epidemiological week 14.
To date in 2019, 39 cases of measles and no cases of rubella have been reported. The last case of rubella was reported in 2016 and the last case of congenital rubella syndrome/infection was reported in September 2018.
Figure 1: Number of cases of measles (n=39), rubella (n=0), and congenital rubella syndrome (n=0)Footnote 3 by week of rash onset, as reported to the Canadian Measles/Rubella Surveillance System (CMRSS) and Measles and Rubella Surveillance System (MARS), for the period ending April 6, 2019.
Figure 1 - Text equivalent
|Epidemiological Week of Rash Onset, 2019||Number of confirmed measles cases reported||Number of confirmed rubella cases reported||Number of confirmed congenital rubella syndrome/infection cases reported|
|Missing Rash Onset||0||0||0|
There are currently 10 activeFootnote * cases of measles reported in Canada.
Figure 2: Distribution of activeFootnote *, confirmed measles cases by health region.
Figure 2 - Text equivalent
|Health Region||Measles Active Cases|
|Eastern Regional Integrated Health Authority||0|
|Central Regional Integrated Health Authority||0|
|Western Regional Integrated Health Authority||0|
|Labrador-Grenfell Regional Integrated Health Authority||0|
|Prince Edward Island||0|
|South Shore District Health Authority||0|
|South West Nova District Health Authority||0|
|Annapolis Valley District Health Authority||0|
|Colchester East Hants Health Authority||0|
|Cumberland Health Authority||0|
|Pictou County Health Authority||0|
|Guysborough Antigonish Strait Health Authority||0|
|Cape Breton District Health Authority||0|
|Capital District Health Authority||0|
|Zone 1 (NB)||0|
|Zone 2 (NB)||0|
|Zone 3 (NB)||0|
|Zone 4 (NB)||0|
|Zone 5 (NB)||0|
|Zone 6 (NB)||0|
|Zone 7 (NB)||0|
|Québec et Chaudières-Appalaches||0|
|Montréal et Laval||1|
|Ontario Central East||0|
|Ontario Central West||0|
|Ontario North East||0|
|Ontario North West||0|
|Ontario South West||0|
|City of Toronto Health Unit||1|
|Winnipeg Regional Health Authority||0|
|Prairie Mountain Health||0|
|Interlake-Eastern Regional Health Authority||0|
|Northern Regional Health Authority||0|
- Footnote *
Active cases or outbreaks are those in which the onset date of the most recent case/outbreak-associated case falls within 32 days of the issue date of this reportFootnote 4.
In 2019, twenty-nine (29) cases of measles have been genotyped and the genotypes were B3 (n=11) and D8 (n=18).
In week 14, two measles cases were genotyped. Both were exposed in Canada with unknown sources of exposure: one reported by the province of Québec with rash onset in week 13 and the second reported by the province of British Columbia with rash onset in week 14. Both were genotype D8 and identical to the WHO named strain MVs/Gir Somnath.IND/42.16/ (GenBank accession number KY120864) which is circulating globally.
Figure 3: Distribution of measles genotypes detected in 2019 (n=29) by week† of rash onset.
Figure 3 - Text equivalent
|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 named strains), refer to Hiebert J and Severini A. Canada Communicable Disease Report. 2014; 40-12: 257-260.
- Footnote 1
Active cases or outbreaks are those in which the onset date of the most recent case/outbreak-associated case falls within 32 days of the issue date of this report.
- Footnote 2
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 3
Epidemiological week of birth is used for congenital rubella syndrome cases.
- Footnote 4
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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