Measles & Rubella Weekly Monitoring Report - Week 18, 2018: April 29 to May 5, 2018
- In Canada, one new case of measles and no new cases of rubella were reported in week 18, 2018.
- Ten cases of measles and no cases of rubella have been reported in Canada in 2018.
- Globally, there are large measles outbreaks reported in Europe which have affected a large number of countries. Canadians travelling to Europe are invited to consult the travel health notice for more information.
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During epidemiological week 18, 2018 new laboratory-confirmed case of measles was reported by the province of Ontario1.The case is child who had rash onset on May 2, a few days after returning back from India. The case was not vaccinated. No cases of rubella were reported.
To date in 2018, a total of 10 cases have been reported, all cases were imported or associated with an imported case.
The last rubella case was reported in February 2016.
Figure 1: Number of cases of measles (n=10) and rubella (n=0), 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 5, 2018.
Figure 1 - Long Description
|Epidemiological Week of Rash Onset, 2018||Number of confirmed measles cases reported||Number of confirmed rubella cases reported|
|Missing Rash Onset||0||0|
There are currently four activeNote * cases of measles reported in Canada.
There are no reported active cases of rubella in Canada.
Figure 2: Distribution of activeFootnote *, confirmed measles cases by health region.
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||0||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||3||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||1||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|
In 2018, eight cases of measles have been genotyped and the genotypes were D8 (n=4) and B3 (n=4) (Figure 3).
The three secondary cases, reported during week 17, with epidemiological link to an index case imported from Romania, were measles genotype B3. The genotype B3 virus for all three cases was identical to the WHO named strain MVs/Dublin.IRL/8.16/.
Figure 3: Distribution of measles genotypes detected in 2018 (n=8) by weekFigure 2 - Note † of rash onset.
Figure 3 - Long 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.
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