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  • Title: Use of alpha-naphthyl acetate esterase staining to identify T lymphocytes in cattle.
    Author: Kajikawa O, Koyama H, Yoshikawa T, Tsubaki S, Saito H.
    Journal: Am J Vet Res; 1983 Aug; 44(8):1549-52. PubMed ID: 6194722.
    Abstract:
    Peripheral blood lymphocytes (PBL), lymph nodes, and/or spleens from clinically normal cattle were examined for cytochemical staining of alpha-naphthyl acetate esterase (ANAE). Two types of positive-staining patterns in ANAE staining resulted. By a combination of ANAE staining and latex-ingesting test, diffuse ANAE-positive cells were considered as mononuclear phagocytic cells. Using erythrocyte rosettes, erythrocyte antibody complement rosettes, nylon-wool column technique, surface immunoglobulin (SIg) staining, and the ANAE staining technique, granular ANAE-positive lymphocytes were shown to be T lymphocytes. The frequency of T and B lymphocytes in PBL, spleens, and lymph nodes of clinically normal cattle was measured, using ANAE staining and SIg staining. In PBL, 47.7% were ANAE-positive and 26.9% were SIg-positive; in spleens, 22.4% were ANAE-positive and 53.7% were SIg-positive; and in lymph nodes, 38.5% were ANAE-positive and 28.3% were SIg-positive. The frequencies of T and B lymphocytes in PBL, spleens, and/or lymph nodes from cattle with enzootic bovine leukosis (EBL) and cattle with persistent lymphocytosis and in tumor cells from cattle with EBL were measured. When compared with those of clinically normal cattle, PBL, spleens, and lymph nodes of cattle with EBL and the PBL of cattle with persistent lymphocytosis contained numerous SIg-positive cells and few ANAE-positive cells. Tumor cells from cattle with EBL contained 7.3% ANAE-positive and 78.0% SIg-positive cells.
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