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Related Experiment Videos

A cat with Corynebacterium equi lymphadenitis clinically simulating lymphosarcoma.

S S Jang, A Lock, E L Biberstein

    The Cornell Veterinarian
    |April 1, 1975
    PubMed
    Summary

    A cat presented with granulomatous lymphadenitis caused by Corynebacterium equi, initially misdiagnosed as lymphosarcoma. Bacterial culture confirmed Corynebacterium equi as the causative agent in the affected lymph nodes.

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    Area of Science:

    • Veterinary Pathology
    • Microbiology
    • Feline Medicine

    Background:

    • Granulomatous lymphadenitis is an inflammatory condition affecting lymph nodes.
    • Corynebacterium equi (now known as Rhodococcus equi) can cause infections in various animal species.
    • Lymphosarcoma is a common neoplastic disease in cats.

    Purpose of the Study:

    • To describe a case of granulomatous lymphadenitis in a cat.
    • To identify the causative agent of the lymphadenitis.
    • To highlight the clinical presentation and diagnostic challenges.

    Main Methods:

    • Clinical examination of the affected cat.
    • Histopathological examination of lymph node biopsies.
    • Bacteriological culture and identification from lymph node samples.

    Main Results:

    • The cat exhibited clinical signs suggestive of lymphosarcoma.
    • Histopathology revealed granulomatous inflammation in the lymph nodes.
    • Corynebacterium equi was successfully isolated and identified from the lymph nodes.

    Conclusions:

    • Corynebacterium equi should be considered in the differential diagnosis of feline lymphadenitis, especially when presenting with granulomatous changes.
    • Clinical misdiagnosis as lymphosarcoma can occur, emphasizing the importance of microbiological diagnostics.
    • This case underscores the zoonotic potential of Rhodococcus equi infections.

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