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Bovine lymphosarcoma in twin calves.

S Chander, L A Whitt, A S Greig

    Canadian Journal of Comparative Medicine : Revue Canadienne De Medecine Comparee
    |July 1, 1977
    PubMed
    Summary

    This study reports the first observed case of lymphosarcoma in twin calves in Canada. Chromosomal aneuploidy was detected, but bovine leukemia virus infection was not found, highlighting the need to differentiate calf and adult leukosis forms.

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    Area of Science:

    • Veterinary Pathology
    • Oncology
    • Genetics

    Background:

    • Lymphosarcoma is a significant neoplastic disease in cattle.
    • Enzootic bovine leukosis (EBL) is primarily associated with adult cattle.
    • The occurrence of lymphosarcoma in young calves presents a diagnostic challenge.

    Purpose of the Study:

    • To report the first documented case of lymphosarcoma in twin calves in Canada.
    • To investigate the potential role of bovine leukemia virus (BLV) in calf lymphosarcoma.
    • To explore the chromosomal abnormalities associated with this condition.

    Main Methods:

    • Clinical case reporting of twin calves with lymphosarcoma.
    • Cytogenetic analysis of peripheral blood and cultured mononuclear cells.
    • Hematological and serological testing for BLV infection.
    • Electron microscopy and tissue culture for BLV detection.

    Main Results:

    • The affected calves exhibited lymphosarcoma, a condition previously unobserved in Canadian calves.
    • Aneuploidy of chromosomes was identified in the mononuclear cells of one calf.
    • No evidence of BLV infection was detected in the affected calves or the herd through various diagnostic methods.
    • BLV infection could not be confirmed in the leukemic cells.

    Conclusions:

    • The findings suggest a potential etiological difference between calf lymphosarcoma and adult enzootic bovine leukosis.
    • Further research is required to elucidate the relationship between juvenile and adult forms of bovine leukosis.
    • The absence of BLV in this case warrants investigation into alternative causes or distinct disease pathways in young cattle.

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