소의 고사리중독에 관한 실험적 연구 = Studies on Clinical Signs in Experimental Bovine Bracken Poisoning

다국어 초록 (Multilingual Abstract)

In studies on the experimental production of bracken fern poisoning cattle, the authors were observed symptoms and morbid anatomical findings. Bracken fern poisonings were produced on three calves by feeding fresh bracken leaves. The results obtained in this study are summarized as follows; 1. The three calves presented marked clinical findings of bracken fern poisoning over a period from 25th day, which died on the 34th day, 31st day after the experiments`. feeding. 2. Clinical findings showed high fever, hemorrhage of visiblemucosa, rhinohemorrhage, bloody faces, hemorrhagic urine, diarrhea, anemia, cardioinhibitory, hepatic dysfunction and dyspnea. 3. Hematologically, agranulocytes, thrombopenia, leucopenia, oligocythemia were found. Disturbance in blood coagulation was observed in them. 4. Microscopical findings in the bone marrow show ed that the marked decrease of granulocytes, disappearance of mature cell, immaturecell, thrombocytes, erythroblast, immature erythroblast and atrophy of the bone marrow. 5. Main morbid anatomical changes showed general hemorrhage, namely; general subcutaneous tissue, muscle, mucosa, serosa and marked hemorrhage in parenchymatous tissue, of disturbance in blood coagulation. subcutaneous tissue was observed gelatinous infiltration, atrophy of spleen, ulcer of omasum mucosa and abomasum mucosa, streak-like hemorrhage of caecum mucosa. From the results obtained the symptoms are consistant with previous signs for outbreak cases of bracken fern poisoningin Jedong (KAL) ranch, May 1974.