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Volume 25, Number 2—February 2019

Echinococcus multilocularis Infection, Southern Ontario, Canada

Jonathon D. KotwaComments to Author , Mats Isaksson, Claire M. Jardine, G. Douglas Campbell, Olaf Berke, David L. Pearl, Nicola J. Mercer, Eva Osterman-Lind, and Andrew S. Peregrine
Author affiliations: University of Guelph, Guelph, Ontario, Canada (J.D. Kotwa, C.M. Jardine, G.D. Campbell, O. Berke, D.L. Pearl, A.S. Peregrine); National Veterinary Institute, Uppsala, Sweden (M. Isaksson, E. Osterman-Lind); Canadian Wildlife Health Cooperative, Guelph (C.M. Jardine, G.D. Campbell); Wellington-Dufferin-Guelph Public Health, Guelph (N.J. Mercer)

Main Article


Prevalence of Echinococcus multilocularis infection and Bayesian-smoothed prevalence estimates in wild canids, by public health unit, southern Ontario, 2015–2017*

Public health unit
No. wild canids

Unadjusted, %
(95% CI)†
Bayesian estimate, %
3527 Brant County Health Unit 14 10 71 (45–89) 46
3530 Durham Regional Health Unit 2 0 0 (0–71) 27
3531 Elgin-St. Thomas Health Unit 15 5 33 (15–58) 30
3533 Grey Bruce Health Unit 56 6 11 (5–22) 13
3534 Haldimand-Norfolk Health Unit 10 4 40 (17–69) 36
3535 Haliburton, Kawartha, Pine Ridge District Health Unit 0 NA NA NA
3536 Halton Regional Health Unit 11 5 45 (21–72) 28
3537 City of Hamilton Health Unit 12 5 42 (19–68) 34
3538 Hastings and Prince Edward Counties Health Unit 1 1 100 (17–100) 25
3539 Huron Health Unit 39 3 8 (2–21) 19
3540 Chatham-Kent Health Unit 1 1 100 (17–100) 31
3541 Kingston, Frontenac and Lennox and Addington Health Unit 2 0 0 (0–71) 5
3542 Lambton Health Unit 1 0 0 (0–83) 21
3543 Leeds, Grenville and Lanark District Health Unit 44 2 5 (<1–16) 4
3544 Middlesex-London Health Unit 41 14 34 (21–50) 28
3546 Niagara Regional Health Unit 19 6 32 (15–54) 37
3551 City of Ottawa Health Unit 3 0 0 (0–62) 4
3552 Oxford County Health Unit 36 7 19 (9–35) 28
3553 Peel Regional Health Unit 0 NA NA NA
3554 Perth District Health Unit 35 10 29 (16–45) 24
3555 Peterborough County-City Health Unit 0 NA NA NA
3557 Renfrew County and District Health Unit 1 0 0 (0–83) 5
3558 Eastern Ontario Health Unit 1 0 0 (0–83) 4
3560 Simcoe Muskoka District Health Unit 1 0 0 (0–83) 17
3565 Waterloo Health Unit 12 3 25 (8–54) 28
3566 Wellington-Duferin-Guelph Health Unit 55 12 22 (13–35) 20
3568 Windsor-Essex County Health Unit 40 10 25 (14–40) 27
3570 York Regional Health Unit 8 3 38 (13–70) 27
3595 City of Toronto Health Unit 0 NA NA NA

*NA, not applicable.
†Our data failed to meet the underlying assumption of independence for constructing CIs. We constructed Agresti-Coull confidence intervals for prevalence estimates because this method has been recommended for data that violate the assumption of independence (31).

Main Article

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Page created: January 18, 2019
Page updated: January 18, 2019
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