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《Journal of Beijing Agricultural College》 2006-01
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Pathogenicity and Immunogenicity a New Isolated Strain of E. mitis

ZHAO Ai-yun, DUAN Jia-shu (Beijing Agricultural College, Beijing 102208,China;Xinjiang Agricultural University, Urumchi 830052,China)  
Experiments were conducted to investigate the pathogenicity and immunogenicity of a new isolated strain of E. mitis. Results showed that 21day-old male Luoman chickens appeared normal 6 days after infections with 1000 and 5 000 sporulated oocysts of E. mitis and no lesions were observed in the intestines. However, 100 000 oocysts and 500 000 oocysts were apparently pathogenic and the average weight gains were 70. 3% and 56. 8% respectively compared with that of the unimmunized group. The general appearances of the intestines were abnormal with the average intestinal scores of 1. 43 and 2. 37 respectively. Chickens immunized with 5 000 oocysts of E. mitis were completely protected against the challenge with 200 000 oocysts of E. mitis 2 weeks later.
【CateGory Index】: S852.72
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1 ZHU Shan-shan,CUI Wen,DUAN Jia-shu,REN Xiao-ming(Beijing University of Agriculture,Beijing,102206,China);Research on Pathogenicity of E.imeria mitis in Chickens[J];Progress in Veterinary Medicine;2007-12
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