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Cerebral nematodiasis in captive nutria

A W Dade, J F Williams, A L Trapp

    Journal of the American Veterinary Medical Association
    |November 1, 1977
    PubMed
    Summary

    A novel parasitic brain infection, cerebral nematodiasis, affected zoo nutria. Discontinuing poplar branches, a potential source of parasites, resolved the neurological disease in the nutria population.

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    Area of Science:

    • Veterinary Neurology
    • Parasitology
    • Wildlife Diseases

    Background:

    • Nutria (Myocaster coypus) in a city zoo experienced a high mortality rate due to a progressive central nervous system disease.
    • Histopathologic examination revealed parasitic infections as the cause of the neurological condition.

    Purpose of the Study:

    • To identify the causative agent of the central nervous system disease in nutria.
    • To determine the source of the parasitic infection and implement control measures.

    Main Methods:

    • Histopathological analysis of affected nutria brains.
    • Epidemiological investigation of recent management changes, including diet.
    • Monitoring of clinical signs and disease resolution after intervention.

    Main Results:

    • Cerebral nematodiasis, complicated by nosematosis, was diagnosed as the cause of the disease.
    • The outbreak coincided with the introduction of poplar tree branches from an area frequented by wildlife (skunks, raccoons).
    • Neurological signs resolved within two months after the discontinuation of poplar branches.

    Conclusions:

    • Poplar branches served as a likely vector for parasitic transmission to the nutria.
    • Environmental contamination and wildlife interaction pose risks for parasitic zoonoses in captive animals.
    • Management of animal diets and enclosures is critical for preventing disease outbreaks.

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