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Ovine brucellosis in alberta.

L Niilo, D W Macdonald, G F Godkin

    The Canadian Veterinary Journal = La Revue Veterinaire Canadienne
    |June 1, 1986
    PubMed
    Summary
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    Zoology (Jena, Germany)·2019

    Ovine brucellosis, caused by Brucella ovis, affects Alberta sheep flocks. Surveys found 8.6% of flocks infected, with up to 67% of rams reacting to diagnostic tests.

    Area of Science:

    • Veterinary Medicine
    • Infectious Diseases
    • Animal Health

    Background:

    • Brucella ovis infection, or ovine brucellosis, is a significant concern in sheep populations.
    • Epididymitis in rams, caused by Brucella ovis, can lead to reduced flock fertility and economic losses.

    Purpose of the Study:

    • To determine the prevalence of Brucella ovis infection in Alberta sheep flocks.
    • To evaluate diagnostic tests for ovine brucellosis.

    Main Methods:

    • Conducted two parallel surveys of rams in Alberta sheep flocks over 24 and 17 months.
    • Utilized complement fixation test (CFT), serology, and culture methods for diagnosis.
    • Compared CFT and enzyme-linked immunosorbent assay (ELISA) with clinical criteria.

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    Main Results:

    • Identified Brucella ovis infection in 8.6% of tested flocks, representing 12.5% of estimated Alberta sheep flocks.
    • Up to 67% of rams in infected flocks showed positive reactions to the CFT.
    • Both CFT and ELISA successfully identified culture-positive rams, indicating high diagnostic sensitivity.

    Conclusions:

    • Ovine brucellosis is prevalent in Alberta sheep flocks, necessitating effective diagnostic strategies.
    • Complement fixation test and ELISA are reliable serological methods for diagnosing Brucella ovis epididymitis.
    • Integrating serological results with flock history and clinical findings enhances diagnostic accuracy.