Volume 27, Number 2—February 2021
Research
Increasing Incidence of Invasive Group A Streptococcus Disease in First Nations Population, Alberta, Canada, 2003–2017
Gregory J. Tyrrell
, Christopher Bell, Lea Bill, and Sumana Fathima
, Christopher Bell, Lea Bill, and Sumana Fathima
Table 4
emm clusters among group A Streptococcus from First Nations and non–First Nation persons with invasive disease, Alberta, Canada, 2003–2017
| Cluster type | First Nations, no. (%) | Non–First Nations, no. (%) | Total cases | p value |
|---|---|---|---|---|
| A-C3 | 32 (5.8) | 568 (22.7) | 600 | <0.001 |
| A-C4 | 15 (2.7) | 141 (5.6) | 156 | 0.004 |
| A-C5 | 12 (2.2) | 130 (5.2) | 142 | 0.001 |
| D2 | 1 (0.2) | 2 (0.1) | 3 | 0.902 |
| D3 | 0 | 3 (0.2) | 3 | 0.948 |
| D4 | 166 (30.0) | 310 (12.4) | 476 | <0.001 |
| E1 | 7 (1.3) | 83 (3.1) | 90 | 0.008 |
| E2 | 18 (3.3) | 64 (2.6) | 82 | 0.435 |
| E3 | 65 (11.7) | 199 (8.0) | 264 | 0.007 |
| E4 | 79 (14.3) | 616 (24.6) | 695 | <0.001 |
| E5 | 0 | 5 (0.2) | 5 | 0.736 |
| E6 | 125 (22.6) | 268 (10.7) | 393 | <0.001 |
| M5 | 4 (0.7) | 18 (0.7) | 22 | 0.787 |
| M6 | 7 (1.3) | 62 (2.5) | 69 | 0.100 |
| M23 | 1 (0.2) | 0 | 1 | 0.362 |
| M74 | 22 (4.0) | 32 (1.3) | 54 | <0.001 |
| M111 | 0 | 1 (0.1) | 1 | 0.408 |
| M122 | 0 | 1 (0.1) | 1 | 0.408 |
| M218 |
0 |
1 (0.1) |
1 |
0.408 |
| Total | 554 (100) | 2,504 (100) | 3,058 | Not applicable |
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