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Encephalitozoonosis in squirrel monkeys (Saimiri sciureus).

D H Zeman, G B Baskin

    Veterinary Pathology
    |January 1, 1985
    PubMed
    Summary
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    Encephalitozoonosis, a parasitic infection, caused significant health issues in young squirrel monkeys, including congenital cases. The study details the widespread inflammation and organ damage observed in affected primates.

    Area of Science:

    • Veterinary Pathology
    • Primate Medicine
    • Infectious Diseases

    Background:

    • Encephalitozoonosis is a parasitic infection affecting various animal species.
    • Squirrel monkeys are utilized in research settings, making their health critical.
    • Naturally occurring infections in primate colonies require thorough investigation.

    Purpose of the Study:

    • To report and characterize naturally occurring encephalitozoonosis in squirrel monkeys.
    • To document the pathological findings associated with the infection.
    • To identify potential risk factors and transmission routes in a breeding colony.

    Main Methods:

    • Case reporting of twenty-two affected squirrel monkeys.
    • Histopathological examination of multiple organs including brain, kidneys, lungs, adrenals, and liver.

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  • Identification of Encephalitozoon organisms and inflammatory responses.

    • Main Results:

    • Characteristic granulomatous inflammation and Encephalitozoon organisms were found in multiple organs.
    • Vasculitis and perivasculitis were common lesions.
    • Seven cases were congenital, and ten occurred in monkeys under nine months old.
    • Granulomatous placentitis was observed in one case, an unreported finding.

    Conclusions:

    • Encephalitozoonosis poses a significant threat to squirrel monkey breeding colonies.
    • Congenital transmission and early-onset infections are notable concerns.
    • The findings highlight the need for surveillance and control measures for encephalitozoonosis in non-human primates.