Comparative Studies of Piroplasma protozoa in China

梨形体病在世界许多地区都有报道。然而，关于中国的这种疾病还没有详细的报道。除了冲绳县以外，日本的梨形体病都是由瑟氏泰勒虫、卵形巴贝斯虫和吉氏巴贝斯虫引起的，这三种病原体都是由壁虱物种长角血蜱传播的。在中国，已鉴定出感染马、牛、水牛、羊和狗的10种梨形体。二联球虫主要分布在南方省份。牛黄杆菌流行于贵州、安徽、山西、河南等省，卵白球虫流行于贵州、湖南、河北、河南、吉林等省，流行地区为内蒙古、新疆和北方省份。丝核菌主要分布于贵州、吉林、辽宁、河北、河南、湖南、云南、陕西、甘肃、宁夏等省。吉氏双胞菌是中国唯一发现的感染犬的鹦鹉热体。该病毒最初在河南和江苏两省被发现。我们的研究方向如下：1.梨形体与媒介蚤的比较研究。人工刺激对媒介蚤的抗性的方法。牛对疾病的免疫接种方法。我们相信进一步的工作正在进行中。

Piroplasmosis has been reported by the investigators in many area of the world. However, no detailed reports have been made on this disease in China. This project a comparison of Piroplasmosis in Japan with those other Theileria and Babesia species in China.Piroplasmosis in Japan except in the Okinawa Prefecture is caused by Theileria sergenti, Babesia ovata, and Babesia gibsoni, All three infectious agents are transmitted by tick species, Haemaphysalis longicornis. In china, ten species of piroplasmas that infect horse, cattle, buffalo, sheep and dog have been identified.B.bigemina mainly exists in the southern provinces. B.bovis is prevalent in Guizhou, Anhui, Shanxi and Henan provinces, and B.ovata in Guizhou, Hunan, Hebei, Henan and Jilin provinces.The epidemic areas of T.annulata are Neimeng, Xinjiang and the northern provinces. T.Sergenti is primarity distributed in Guizhou, Jilin, Liaoning, Hebei, Henan, Hunan, Yunnan, Shaanxi, Gansu and Ningxia provinces. B.gibsoni is the only identified piroplasmas infecting dog in China. It was initially found in Henan and Jiangsu provinces.From those results. We regard the following line :1. Investigation of comparative studies of piroplasma and vector ticks.2. Methods of artificial stimulation of resistance to vector ticks.3. Methods of immunization of cattle against disease.We blieve that further work to establish this is in progress.