Measles & Rubella Weekly Monitoring Report – Week 34: August 20 to August 26, 2023

On this page

• Epidemiological summary
• Geographic distribution
• Laboratory summary

Epidemiological summary

During epidemiological week 34, 2023, 1 new case of congenital rubella syndrome and no new cases of measles or rubella were reported in Canada.^{Footnote 2} The case was reported by the province of Ontario, and the case is in a newborn whose mother acquired the infection in Kenya. The risk of disease transmission in Canada has been deemed to be low.

To date in 2023, 7 cases of measles, 0 cases of rubella and 2 cases of congenital rubella syndrome have been reported. The last case of rubella was reported in December 2019.

Figure 1 - Text description

Epidemiological Week of Rash Onset, 2023	Number of confirmed measles cases reported	Number of confirmed rubella cases reported	Number of confirmed congenital rubella syndrome/infection cases reported
1	1	0	0
2	0	0	0
3	0	0	0
4	0	0	0
5	0	0	0
6	0	0	0
7	2	0	0
8	0	0	0
9	0	0	0
10	0	0	0
11	0	0	0
12	0	0	0
13	0	0	0
14	1	0	0
15	0	0	0
16	1	0	0
17	0	0	0
18	1	0	0
19	0	0	0
20	0	0	0
21	0	0	0
22	0	0	0
23	1	0	0
24	0	0	0
25	0	0	0
26	0	0	0
27	0	0	0
28	0	0	0
29	0	0	0
30	0	0	0
31	0	0	0
32	0	0	1
33	0	0	0
34	0	0	1
35	0	0	0
36	0	0	0
37	0	0	0
38	0	0	0
39	0	0	0
40	0	0	0
41	0	0	0
42	0	0	0
43	0	0	0
44	0	0	0
45	0	0	0
46	0	0	0
47	0	0	0
48	0	0	0
49	0	0	0
50	0	0	0
51	0	0	0
52	0	0	0
Cases (year-to-date)	7	0	2

Geographic distribution

There are currently 2 active^{Footnote **} cases of congenital rubella syndrome and no active^{Footnote *} cases of measles or rubella in Canada.

Figure 2 - Text description

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)	0
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
Centre-du-Québec	0
Montréal et Laval	0
Ouest-du-Québec	0
Montérégie	0
Nord-Est	0
Ontario Central East	0
Ontario Central West	1
Ontario Eastern	0
Ontario North East	0
Ontario North West	0
Ontario South West	0
City of Toronto Health Unit	0
Winnipeg Regional Health Authority	0
Prairie Mountain Health	0
Interlake-Eastern Regional Health Authority	0
Northern Regional Health Authority	0
Southern Health	0
Saskatchewan South	1
Saskatchewan Central	0
Saskatchewan North	0
South Zone	0
Calgary Zone	0
Central Zone	0
Edmonton Zone	0
North Zone	0
British Columbia	0
Yukon	0
Northwest Territories	0
Nunavut	0

Laboratory summary

Measles

To date in 2023, 7 cases of measles have been genotyped and the genotypes were B3 (n=2) and D8 (n=5).

Figure 3 - Text description

Epi week	B3	B3 - Harare	D4	D8	D8 - Taunton	D9	H1	Total
1	1	0	0	0	0	0	0	1
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	0	0	0	0	0	0	0	0
7	1	0	0	1	0	0	0	2
8	0	0	0	0	0	0	0	0
9	0	0	0	0	0	0	0	0
10	0	0	0	0	0	0	0	0
11	0	0	0	0	0	0	0	0
12	0	0	0	0	0	0	0	0
13	0	0	0	0	0	0	0	0
14	0	0	0	1	0	0	0	1
15	0	0	0	0	0	0	0	0
16	0	0	0	1	0	0	0	1
17	0	0	0	0	0	0	0	0
18	0	0	0	1	0	0	0	1
19	0	0	0	0	0	0	0	0
20	0	0	0	0	0	0	0	0
21	0	0	0	0	0	0	0	0
22	0	0	0	0	0	0	0	0
23	0	0	0	1	0	0	0	1
24	0	0	0	0	0	0	0	0
25	0	0	0	0	0	0	0	0
26	0	0	0	0	0	0	0	0
27	0	0	0	0	0	0	0	0
28	0	0	0	0	0	0	0	0
29	0	0	0	0	0	0	0	0
30	0	0	0	0	0	0	0	0
31	0	0	0	0	0	0	0	0
32	0	0	0	0	0	0	0	0
33	0	0	0	0	0	0	0	0
34	0	0	0	0	0	0	0	0
35	0	0	0	0	0	0	0	0
36	0	0	0	0	0	0	0	0
37	0	0	0	0	0	0	0	0
38	0	0	0	0	0	0	0	0
39	0	0	0	0	0	0	0	0
40	0	0	0	0	0	0	0	0
41	0	0	0	0	0	0	0	0
42	0	0	0	0	0	0	0	0
43	0	0	0	0	0	0	0	0
44	0	0	0	0	0	0	0	0
45	0	0	0	0	0	0	0	0
46	0	0	0	0	0	0	0	0
47	0	0	0	0	0	0	0	0
48	0	0	0	0	0	0	0	0
49	0	0	0	0	0	0	0	0
50	0	0	0	0	0	0	0	0
51	0	0	0	0	0	0	0	0
52	0	0	0	0	0	0	0	0
Total	2	0	0	5	0	0	0	7

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.

The current global distribution of measles genotypes can be found on the WHO Measles Surveillance website.

Rubella and Congenital rubella syndrome/infection

During epidemiological week 34, 2023, the genotype was identified for one congenital rubella syndrome case that had been reported in epidemiological week 33. The case is a newborn whose mother acquired the infection in Nigeria.

To date in 2023, 1 congenital rubella syndrome case has been genotyped and it was genotype 1G.