Veterinary Pathology, Vol 32, Issue 6 683-691, Copyright © 1995 by American College of Veterinary Pathologists

ARTICLES

Phenotypic analysis of neoplastic cells from calf, thymic, and intermediate forms of bovine leukosis

M. Asahina, K. Kimura, K. Murakami, T. Ajito, D. Wu, M. Goryo, Y. Aida, W. C. Davis and K. Okada
Department of Veterinary Pathology, Faculty of Agriculture, Iwate University, Japan.

Immunohistochemistry and flow cytometric analysis were used with monoclonal antibodies to examine the phenotype of neoplastic cells from cattle with sporadic bovine leukosis (three cases of calf form, two cases of thymic form, and three cases of intermediate form). Three cases of calf form and two cases of intermediate form were positive for B cell lineage in immunohistologic examination and in flow cytometric analysis for B-B2+, sIgM+, and major histocompatibility class II+. Two cases of thymic form and one case of intermediate form were CD2+, CD5+, CD6+, and CD8+ in immunohistologic examination and in flow cytometric analysis. The results show that neoplastic cells develop from B and T cell lineages in sporadic bovine leukosis.

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