Measles & Rubella Weekly Monitoring Report – Week 20: May 12 to May 18, 2019
- In Canada, three new cases of measles and no new cases of rubella were reported in week 20, 2019.
- Currently, there are eight activeFootnote 1 cases of measles in Canada.
- Fifty-four (54) 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, Alberta, and New Brunswick.
- 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 20, 2019 three new confirmed cases of measles and no new cases of rubella were reported in CanadaFootnote 2. The first and second cases were reported by the province of Quebec: both were exposed to a previously reported case from Quebec. The onset of rash occurred in epidemiological week 19 for the first case and in epidemiological week 20 for the second case. The third case reported by the province of Alberta, with rash onset in epidemiological week 20, was acquired while travelling to Vietnam and Thailand.
To date in 2019, 54 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=54), 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 May 18, 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 eight 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)||1|
|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||3|
|Ontario Central East||0|
|Ontario Central West||1|
|Ontario North East||0|
|Ontario North West||0|
|Ontario South West||0|
|City of Toronto Health Unit||2|
|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, forty-three (43) cases of measles have been genotyped and the genotypes were B3 (n=14) and D8 (n=29), both of which are circulating globally.
In week 20, three measles cases were genotyped. All cases had rash onset in epidemiological week 19.
Two cases were genotype D8 and identical to the WHO named strain MVs/Gir Somnath.IND/42.16/ (GenBank accession number KY120864), which is circulating globally. One of these cases was reported by the province of New Brunswick, linked to an earlier case, while the second case was reported by the province of Ontario with travel history to the United States.
The third case genotyped in week 20 was reported by the province of Ontario and had travel history to the Philippines. It was genotype B3 which has been previously imported into Canada from the Philippines in 2019.
Figure 3: Distribution of measles genotypes detected in 2019 (n=43) 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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