| 巨型艾美耳球虫早熟减毒株的选育 |
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| 引用本文： | 王江清,李德昌,张勤. 巨型艾美耳球虫早熟减毒株的选育[J]. 中国兽医学报, 1991, 0(3) |
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| 作者姓名： | 王江清 李德昌 张勤 |
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| 作者单位： | 兽医大学寄生虫病教研室(王江清，李德昌)，河北省畜牧兽医研究所(张勤) |
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| 摘 要： | 对巨型艾美耳球虫(长春株)经20代的早熟选育,其潜隐期由132h缩短到116h,成为早熟株.该早熟株不经选择传递2代,仍保持了早熟的特性.该早熟株比其亲代株繁殖力下降74%,致病力降低,但仍然保持了其免疫原性.
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| 关 键 词： | 鸡 巨型艾美耳球虫 早熟株 减毒 球虫疫苗 |
Selection of a Precocious and Attenuated Strain of Eimeria maxima |
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| Wang Jiangqing et al. Selection of a Precocious and Attenuated Strain of Eimeria maxima[J]. Chinese Journal of Veterinary Science, 1991, 0(3) |
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| Authors: | Wang Jiangqing et al |
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| Abstract: | By 20 generations of serial selection for precociousness, a strain of E. maxima with a prepatent ttme of 116 hours was obtained. This Strain retained its precociousness after 2 passages without selection pressure. Its reproductive potential was lowered and pathogenicity reduced , whereas its immunogenicity was retained. |
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| Keywords: | chick Eimeria maxima precocious strain attenuation coccidial vaccine |
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