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[Pathomorphological studies of aborted fetuses from sheep infected with R. burneti].

P Neĭkov

    Veterinarno-Meditsinski Nauki
    |January 1, 1987
    PubMed
    Summary

    Q fever, a significant cause of ovine abortions, was identified in 14.4% of sheep via serologic testing. Affected fetuses showed characteristic lesions and inflammation, highlighting the impact of Coxiella burnetii on reproductive health.

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    Area of Science:

    • Veterinary Medicine
    • Infectious Diseases
    • Reproductive Health

    Background:

    • Q fever is a zoonotic disease caused by Coxiella burnetii.
    • Ovine abortions are a significant concern in sheep farming, impacting flock productivity.
    • Serological and pathological investigations are crucial for diagnosing infectious causes of abortion.

    Purpose of the Study:

    • To investigate the prevalence of Q fever in sheep experiencing abortions.
    • To characterize the pathological findings associated with Q fever in ovine fetuses.
    • To understand the impact of Coxiella burnetii on sheep reproductive losses.

    Main Methods:

    • Serological testing using the complement fixation (CF) test on 441 ewe blood sera.
    • Histopathological examination of 18 aborted ovine fetuses.
    • Gross examination of fetal and placental tissues.

    Main Results:

    • Positive Q fever serologic results were found in 14.4% of the sheep.
    • Abortions occurred in 4-8% of animals in the final pregnancy month.
    • Fetal necropsy revealed placental swelling, hyperemia, and fetal organ inflammation, including meningoencephalitis.

    Conclusions:

    • Q fever is a prevalent cause of ovine abortions.
    • Coxiella burnetii infection leads to characteristic pathological changes in fetuses.
    • Effective management strategies are needed to control Q fever in sheep flocks.

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