十勝地方の放牧牛に発生したシダ中毒の臨床ならびに病理学的所見

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Clinical and hematologic studies were carried out on 533 cattle for purpose of making an early diagnosis of the affected cases in a pasture where bracken poisoning of cattle occured. The results obtained may be summarized as follows : 1) The affected cattle of bracken poisoning were observed in 35 of the 533 cases examined. Clinical and hematologic findings of the affected cattle were pyrexia, petechia of visible mucous membranes, leucopenia (<5, 000/cu.mm), neutrocytopenia (<1, 000/cu.mm) and thrombocytopenia (<200, 000/cu.mm). The above findings were considered to be diagnostic points in an early stage of bracken poisoning of cattle. 2) Four drugs, namely DL-batylalcohol (3 cases), Cobalt greenpole (2 cases), Fresmin-S (5 cases) and Levertio K_<12> (25 cases) were used for treatment of the 35 head of affected cattle, and the therapeutic effects were compared with clinical and hematologic findings after medication. As a results, DL-batylalcohol was found to be the most effective, while Cobalt greenpole and Fresmin-S showed little difference, however, both of the latter showed lower effects as compared with DL-batylalcohol. Levertio K_<12> showed hardly any effect. 3) Hematopoietic disturbances of the bone marrow namely aplastic and degenerative changes in granulocytic and megakaryocytic series were observed in a typical myelogram of the affected cattle, however, the disturbances were lighter in erythrocytic series than the former. 4) In the patho-histological findings of nine autopsied cases of bracken poisoning, the main finding was multiple hemorrhages of general tissue, aplastic hematopoiesis of the bone marrow, multiple focal necrosis of the liver cells, follicular atrophy or degeneration of the spleen and the lymph nodes, ulceration or necrotic lesion of the mucosa of the stomach and the intestine, pulmonary edema, and edematous rarifaction of the capillary wall of the general organs.
帯広畜産大学の論文
1971-12-15

十勝地方の放牧牛に発生したシダ中毒の臨床ならびに病理学的所見

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