Clinico-pathological study on the mechanism of anemia in piroplasmosis of domestic animals

点击翻译按钮获取中文摘要

In order to establishethe effective therapy and prevention for piroplasmosis in domestic animals, we investigated the mechanism of anemia induced by Babesia gibsoni in dogs. The results were as follows. 1.Babesia gibsoni was successfully cultured in a settled layer of canine erythrocytes. 2. During the cultivation, the concentrations of methemoglobin and malondialdehyde, an end product of lipid peroxidation, in erythrocytes were significantly increased. 3. Glucose consumption and lactate production by infected erythrocytes, and 2,3-DPG concentration were also increased. 4. Erythrocyte deformability was decreased. 5. The erythrophagocytic activity of macrophages obtained from the peripheral blood of the infected dogs showed a marked increase in association with progressive parasitemia. 6. Administration of prednisolone to the infected dogs resuted in a transient recovery from anemia in these dogs. 7. The erythrophagocytic activity of macrophages was not suppressed by the administration of prednisolone in the infected dogs. These results indicate that erythrocytes infected with B.gibsoni were suffered from an oxidative damage by the multiplication of the parasites, and that the erythrophagocytic activity of macrophages against the damaged erythrocytes might be accelerated in infected dogs, resulting in anemia in these dogs.