Measles & Rubella Weekly Monitoring Report: May 3 to May 9, 2015 (week 18)
- In Canada, during week 18, one new case of measles was reported by Quebec.
- A total of 194 cases of measles, and 0 cases of rubella have been reported in Canada for 2015.
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Figure 1. Number of cases of measles (n=194) 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 09, 2015.
During epidemiological week 18, 2015, one new case of measles was reported by Quebec, with rash onset during week 17. This case was an importation, linked to travel to Ethiopia.
The year-to-date total is 194 cases of measles and 0 cases of rubella for 2015.
Note that when additional cases are reported in advance of the cycle, these cases will be described in the appropriate reporting cycle.
To date in 2015, 54 measles cases have been genotyped and the genotypes were: B3 (n=22), D4 (n=17), H1 (n=11) and D8 (n=4).
One case from Quebec, related to travel to Ethiopia, was genotype B3 which is endemic in the African regionFootnote 2.
Figure 3: Distribution of measles genotypes detected in 2015 (n=54) by week of rash onset (if available, n=54) or specimen collection (n=0). Epidemiological weeks are assigned in accordance with WHO guidelines (WHO.WER.2012;9(87):73) with week 1 beginning on the first Monday of the year.
* Genotype B3 sequences identical to sequence variant MVi/Harare.ZWE/38.09 (GenBank accession number JF973033)
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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