Measles & Rubella Weekly Monitoring Report: March 12 to March 18, 2017 (week 11)

Key Points

  • 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.

Epidemiological Summary

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.

Figure 1

Note: Only cases up to the indicated end date are included in this report. Any additional cases will be described in future reports.

Figure 1 - Text Description
Figure 1: Number of cases 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.
Epidemiological Week of Rash Onset, 2017 Number of confirmed measles cases reported Number of confirmed rubella cases reported
1 0 0
2 0 0
3 0 0
4 1 0
5 0 0
6 2 0
7 1 0
8 4 0
9 1 0
10 0 0
11 1 0
Missing Rash Onset 0 0
Cases (year-to-date) 10 0

Geographic Distribution

There are currently 2 reported activeFigure 2 - Footnote *cases of measles in Canada, 1 in Nova Scotia, and 1 in British Columbia (Figure 2).

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: Distribution of activeFigure 2 - Footnote *, confirmed measles cases by health region. Figure 2 - Footnote **

Figure 2
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.

Return to first Figure 2 - Footnote * referrer

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.

Return to first Figure 2 - Footnote ** referrer

Figure 2 - Text Description
Figure 2: Distribution of active Figure 2 Table - Footnote * confirmed measles cases by health region
Health Region Measles Cases Rubella Cases
Figure 2 Table - 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.

Return to Figure 2 Table - Footnote * referrer

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 1 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
Centre-du-Québec 0 0
Montréal et Laval 0 0
Ouest-du-Québec 0 0
Montérégie 0 0
Nord-Est 0 0
Ontario Central East 0 0
Ontario Central West 0 0
Ontario Eastern 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
Southern Health 0 0
Saskatchewan South 0 0
Saskatchewan Central 0 0
Saskatchewan North 0 0
South Zone 0 0
Calgary Zone 0 0
Central Zone 0 0
Edmonton Zone 0 0
North Zone 0 0
British Columbia 1 0
Yukon 0 0
Northwest Territories 0 0
Nunavut 0 0

Laboratory Summary

Measles

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
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.

Return to Figure 3 - Footnote referrer


Figure 3 - Text Description
Figure 3: Distribution of measles genotypes detected in 2017 (n=5) by week Figure 3 Table - Footnote of rash onset
Epi week B3 B3 - Harare D4 D8 D8 - Taunton D9 H1 Total
Figure 3 Table - 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.

Return to Figure 3 Table - Footnote referrer

1 0 0 0 0 0 0 0 0
2 0 0 0 0 0 0 0 0
3 0 0 0 0 0 0 0 0
4 0 0 0 0 0 0 0 0
5 0 0 0 0 0 0 0 0
6 2 0 0 0 0 0 0 0
7 1 0 0 0 0 0 0 0
8 1 0 0 1 0 0 0 0
9 0 0 0 0 0 0 0 0
10 0 0 0 0 0 0 0 0
Total 4 0 0 1 0 0 0 0

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.

Rubella

To date in 2017, no rubella cases have been genotyped.

Footnotes

Footnote 1

Only cases up to the indicated end date are included in this report. Any additional cases will be described in future reports.

Return to footnote 1 referrer

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).

Return to footnote 2 referrer

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