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Volume 18, Number 10—October 2012

Dispatch

Echinococcus multilocularis in Urban Coyotes, Alberta, Canada

Stefano Catalano1, Manigandan Lejeune1, Stefano Liccioli, Guilherme G. Verocai, Karen M. Gesy, Emily J. Jenkins, Susan J. Kutz, Carmen Fuentealba, Padraig J. Duignan, and Alessandro MassoloComments to Author 
Author affiliations: University of Calgary, Calgary, Alberta, Canada (S. Catalano, M. Lejeune, S. Liccioli, G.G. Verocai, S.J. Kutz, P.J. Duignan, A. Massolo); University of Saskatchewan, Saskatoon, Saskatchewan, Canada (K.M. Gesy, E.J. Jenkins); and Ross University, Basseterre, Saint Kitts, Saint Kitts, and Nevis (C. Fuentealba)

Main Article

Table

Echinococcus multilocularis in coyotes carcasses collected in Calgary (n = 83) and Edmonton (n = 8) census metropolitan areas, Alberta, Canada, October 2009–July 2011*

Characteristic Total No. (%) positive or median (range) No. negative IQ distance χ2 (z) df pexact value†
Sex‡

M

44 15 (34.1) 29

F

46 7 (15.2) 39 NA 4.337 1 0.05
Parasite intensity

M

NA 9 (1–1,400) NA 83

F

NA 59 (9–822) NA 137 (−1.406) 0.19
Age‡

Juvenile

43 14 (33.3) 29 NA

Adult

47 8 (17.0) 39 NA 1.661 1 0.226
Parasite intensity

Juvenile

NA 9 (1–151) NA 71

Adult

NA 32 (1–1,400) NA 520 (−0.737) 0.518

*Values in boldface indicate a significant difference. Higher prevalence in male coyotes suggests a role for sex in parasite dispersion. Frequencies of cestodes in males vs. females and juveniles vs. adults were analyzed by using χ2 test. Parasite intensity (no. parasites per host) among sex and age classes was compared by using Mann-Whitney test for independent samples. IQ, interquartile distance; NA, not applicable.
†Probability of distribution was estimated by using the permutation approach (pexact).
‡Sex and age of 1 coyote were not recorded.

Main Article

1These authors contributed equally to this article.

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