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. 2013 Aug;54(8):753-60.

Prevalence and geographic distribution of canine and feline blastomycosis in the Canadian prairies

Jennifer L Davies  1 , Tasha Epp, Hilary J Burgess
Affiliations

Prevalence and geographic distribution of canine and feline blastomycosis in the Canadian prairies

Jennifer L Davies et al. Can Vet J. 2013 Aug.

Abstract
in English, French

This retrospective study reports patient signalment, method of diagnosis and geographic distribution, and examines trends in prevalence and seasonal distribution of blastomycosis cases submitted to a veterinary diagnostic laboratory in Saskatchewan over a 21-year period. Of the 143 cases that originated from Saskatchewan and Manitoba 137 were from canine and 6 from feline patients. Signalment was similar to that previously reported. All cases originated in southern Saskatchewan and Manitoba, primarily from Regina, Moose Jaw, Swift Current, and Winnipeg. Case numbers showed a significant increase in the period 2001 to 2010 compared to 1990 to 2000. Seasonally, there was an increasing trend in the number of diagnoses from February to November. There was no correlation between average seasonal temperature or average seasonal total precipitation and the number of cases of blastomycosis. The persistence of blastomycosis in southern Saskatchewan indicates that Blastomyces dermatitidis is now endemic in this region.

Prévalence et répartition géographique de la blastomycose canine et féline dans les Prairies canadiennes. Cette étude rétrospective présente un rapport sur le signalement du patient, la méthode de diagnostic et la répartition géographique et examine les tendances de prévalence et répartition saisonnière des cas de blastomycose soumis à un laboratoire de diagnostic vétérinaire en Saskatchewan pendant une période de 21 ans. Parmi les 143 cas qui provenaient de la Saskatchewan et du Manitoba, 137 étaient issus de patients canins et 6 de patients félins. Le signalement était semblable à celui antérieurement déclaré. Tous les cas provenaient du sud de la Saskatchewan et du Manitoba, surtout de Regina, de Moose Jaw, de Swift Current et de Winnipeg. Le nombre de cas a affiché une hausse importante pendant la période de 2001 à 2010 comparativement à la période de 1990 à 2000. Sur le plan saisonnier, il se produisait une tendance à la hausse du nombre de diagnostics de février à novembre. Il n’y avait aucune corrélation entre la température saisonnière moyenne ou le total des précipitations saisonnières moyennes et le nombre de cas de blastomycose. La persistance de la blastomycose dans le sud de la Saskatchewan indique que Blastomyces dermatitidis est maintenant endémique dans cette région.(Traduit par Isabelle Vallières).

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Figures

Figure 1
Figure 1
Geographical distribution of canine and feline blastomycosis cases in Saskatchewan and Manitoba between January 1990 and March 2011 (n = 143).
Figure 2
Figure 2
Annual prevalence of canine blastomycosis in Saskatchewan and Manitoba based on submissions to the Prairie Diagnostic Service between January 1990 and December 2010 (bars), relative to total PDS submissions during the same time period (line) (n = 132).
Figure 3
Figure 3
Seasonal distribution of canine blastomycosis cases in Saskatchewan and Manitoba between January 1990 and December 2010 (n = 132).
Figure 4
Figure 4
Average seasonal temperature (triangles, inside right axis) and average total seasonal precipitation (squares, outer left axis) in Moose Jaw, Saskatchewan versus number of Saskatchewan blastomycosis cases per season, between January 1990 and December 2010 (n = 98).
See this image and copyright information in PMC

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