Measles & Rubella Weekly Monitoring Report: March 12 to March 18, 2017 (week 11)
- In Canada, 1 new case of measles was reported in week 11, 2017.
- Two provinces have active measles cases: Nova Scotia (n=1), and British Columbia (n=1). These events are not linked, as they resulted from separate importation events (from India and France respectively). There are no active cases of rubella.
- A total of 10 cases of measles, and zero cases of rubella have been reported in Canada in 2017.
During epidemiological week 11, 2017, 1 new case of measles was reported in Canada . This case was imported from India and had rash onset during week 11 (n=1).
To date in 2017, 10 cases of measles have been reported in Canada, resulting from 4 unique importation events. One importation led to an outbreak (Nova Scotia) resulting in 6 secondary cases.
No cases of rubella have been reported in 2017 (Figure 1). It has been 57 epidemiologic weeks since the last rubella case was reported (week 6, 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 March 18, 2017.
Note: Only cases up to the indicated end date are included in this report. Any additional cases will be described in future reports.
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 - 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 2.
- Figure 2 - Footnote **
No data' is indicated for jurisdictions that do report cases of measles or rubella to the Public Health Agency of Canada, but do not include the public health region variable.
To date in 2017, 5 measles cases have been genotyped and the genotypes are B3 (n=4) and D8 (n=1) (Figure 3). Genotype information is pending for 2 additional cases.
One case with rash onset in week 8 was genotype B3, identical to the MVs/Dublin.IRL/8.16 named strain (GenBank accession number KY013331). An additional case with rash onset in week 8 was genotype D8 and imported from France.
Figure 3: Distribution of measles genotypes detected in 2017 (n=5) by weekFigure 2 - Footnote † of rash onset.
- Figure 3 - Footnote †
Epidemiological weeks for laboratory specimens are assigned in accordance with WHO guidelines (WHO.WER.2012;9 (87):73) with week 1 beginning on the first Monday of the year.
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 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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