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Case Reports
. 2007 Nov;48(11):1146-51, 1154.

Evidence of Parelaphostrongylus tenuis infections in free-ranging elk (Cervus elaphus) in southern Ontario

Terese McIntosh  1 , Rick Rosatte, Doug Campbell, Kate Welch, Dominique Fournier, Maria Spinato, Oladele Ogunremi
Affiliations
Case Reports

Evidence of Parelaphostrongylus tenuis infections in free-ranging elk (Cervus elaphus) in southern Ontario

Terese McIntosh et al. Can Vet J. 2007 Nov.

Abstract
in English, French

The antemortem detection of a Parelaphostrongylus tenuis infection in a free-ranging wild elk (Cervus elaphus) in southern Ontario is documented. Postmortems on other free-ranging elk that died during 2000-2005 indicated that 59% (17/29) were infected with P. tenuis, based on presence of lesions in the brain.

Preuves d’infections à Parelaphostrongylus tenuis chez le wapiti (Cervus elaphus) en élevage extensif dans le sud de l’Ontario. Cet article décrit la détection antémortem d’une infection à Parelaphostrongylus tenuis chez un wapiti en élevage extensif (Cervus elaphus) dans le sud de l’Ontario. Des examens post mortem réalisés sur d’autres wapitis en élevage extensif, morts entre 2000 et 2005, ont révélé que 59 % (17/29) présentaient des lésions au cerveau caractéristiques d’infection à P. tenuis.

(Traduit par Docteur André Blouin)

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Figures

Figure 1
Figure 1
The Parelaphostrongylus tenuis infected bull elk (Case 1) is pictured on February 1, 2005, with several white-tailed deer at a winter feeding site near Bancroft, Ontario (Photo by R. Rosatte).
Figure 2
Figure 2
Parelaphostrongylus tenuis larvating eggs in the brain meninges of the bull elk (Case 1): (a) degenerate larvae, (b) normal looking larva, (c) larva surrounded by eosinophils. Arrows indicate larvae (a, b) or eosinophils (c). Bar = 20μm.
Figure 3
Figure 3
Photos of cross sections of brain from the cow elk (Case 2) showing (a) a submature or adult nematode (compatible with P. tenuis) in a cerebral sulcus bar = 100 μm; (b) (c) larvating nematode eggs (compatible with P. tenuis) in the meninges (photos by D. Campbell); (b) bar = 50 μm, (c) bar = 100 μm.
See this image and copyright information in PMC

References

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    1. Ogunremi O, Lankester M, Gajadhar A. Immunuodiagnosis of experimental Parelaphostrongylus tenuis infection in elk. Can J Vet Res. 2002;66:1–7. - PMC - PubMed
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    1. Forrester S, Lankester M. Extracting protostrongylid nematode larvae from ungulate feces. J Wildl Dis. 1997;33:511–516. - PubMed
    1. Anderson RC, Lankester MW, Strelive UR. Further experimental studies of Pneumostrongylus tenuis in cervids. Can J Zool. 1966;41:851–861. - PubMed

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