Tularemia in Canada with a focus on Saskatchewan

Area of Science:

• Zoonotic diseases
• Bacteriology
• Public Health

Background:

• Tularemia is a rare zoonotic disease in Canada, typically endemic in wildlife populations.
• Rural inhabitants face increased exposure risk to Francisella tularensis via trapping or arthropod bites.
• Muskrats are now the primary wildlife reservoir for tularemia, supplanting rabbits.

Purpose of the Study:

• To highlight the epidemiological shift in tularemia transmission in Canada.
• To describe the clinical presentation and diagnostic methods for tularemia.

Main Methods:

• Review of tularemia epidemiology in Canadian wildlife and human populations.
• Clinical case description of oropharyngeal tularemia in a familial outbreak.
• Emphasis on diagnostic confirmation through serologic testing.

Main Results:

• A familial outbreak of oropharyngeal tularemia in Saskatchewan linked to muskrats illustrates the changing transmission dynamics.
• Human tularemia presents in six forms, often with fever, persistent ulcers, and lymphadenopathy.
• Serologic tests are crucial for confirming Francisella tularensis infection.

Conclusions:

• The epidemiology of tularemia in Canada has shifted, with muskrats becoming a significant source of human infection.
• Awareness of tularemia's diverse clinical manifestations and diagnostic tools is essential for timely medical intervention.
• Public health measures should address the risk of zoonotic transmission from wildlife, particularly muskrats, in rural areas.