| 摘要: |
| 一、引言鸡球虫病是雏鸡的一种严重疾病,对养鸡事业危害很大。北京地区每年4-9月份常发生鸡球虫病,雏鸡的发病率和死亡率均很高。在严重污染而且饲养管理条件比较差的鸡场,其死亡率可高达70—80%,使养鸡事业遭到巨大的经济损失。因此,鸡球虫病的防治对畜牧业经济有着重要的意义,是当前生产上急需解决的问题之一,也是兽医科学工作者的一项很 |
| 关键词: 球虫种类 变位艾美耳球虫 巨型艾美耳球虫 柔嫩艾美耳球虫 堆型艾美耳球虫 鸡球虫病 球虫卵囊 原生质 北京地区 初步调查 |
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| A PRELIMINARY INVESTIGATION OF THE COCCIDIAN SPECIES OF CHICKEN IN THE PEKING AREA |
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| Abstract: |
| The species of chicken coccidia have been investigated on four large-scale farms in the Peking suburbs.This investigation includes three different kinds of observations: 1.The observation of the structure of the oocyst and it's sporula- tion time. 2.The observation of the prepatent period of various species of chicken coccidia.One-day-old chickens(coccidia-free)were artifici- ally infected with about 1,000/per chick oocysts delivered from the first experiment.The discharges of chickens were examined everyda... |
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