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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: A cytogenetic investigation on peripheral blood lymphocytes of cattle affected by enzootic bovine leukemia | Génét. Sét. Evol. 1987 19 1 1-8 A cytogenetic investigation on peripheral blood lymphocytes of cattle affected by enzootic bovine leukemia A. GALLI L. CARBONI A. GHIDONI Consorzio Provinciate Fecondazione Artificiate Via Borgo Palazzo 128 24100 Bergamo Italia Dipartimento di Genettea e di Biologia del Microrganismi Università degli Studi di Milano Via Celoria 26 20133 Milano Italia Summary This cytogenetic study involved 10 Agar-Gel Immunodiffusion AGID test-positive cows without lymphocytosis 6 similar subjects with lymphocytosis and 10 healthy subjects. No appreciable differences were found for aneuploid rates or chromosome aberrations. However a higher frequency of polyploid cells was consistently observed among subjects affected by enzootic bovine leukemia without lymphocytosis average 4.8 p. 100 as compared with healthy controls average 1.5 p. 100 . The lymphocytes in both groups were stimulated by phytohemagglutinin. A higher frequency of polyploid cells was not found among subjects affected by enzootic bovine leukemia with lymphocytosis whose lymphocyte cultures were stimulated by concanavalin A. Key words Chromosome enzootic bovine leukemia Italian Friesian cattle. Resume Etude cytogénétique de lymphocytes du sang périphérique de bovins atteints de leucémie enzootique L etude cytogénétique concernait 10 vaches positives pour le test AGID immunodiffusion en gel d agar et exemptes de lymphocytose 6 sujets similaires atteints de lymphocytose et 10 sujets sains. On n a pas trouvé de difference appreciable pour les taux d aneuploidie OU les aberrations chromosomiques. Cependant on a observe une frequence plus élevée de cellules polyploides chez les sujets atteints de leucémie bovine enzootique sans lymphocytose moyenne 4 8 p. 100 que Chez les témọins sains moyenne 1 5 p. 100 . Dans les 2 groupes les lymphocytes sont stimules par la phytohémagglutinine. On n a pas trouvé une frequence plus élevée de cellules polyploides Chez les sujets atteints de leucemie bovine
