巨型艾美耳球虫(Eimeria maxima)地理株研究 Ⅱ.11株巨型艾美耳球虫的致病性分析  

Study on Geographical Strains of Eimeria maxima Ⅱ.The Pathogenicities of Eleven Geographical Strains of Eimeria maxima

作　　者：陶建平[1] 李文超[2] 辛玲[2] 戴亚斌[3] 沈永林[1] 

机构地区：[1]南京农业大学动物医学院,江苏南京210095 [2]扬州大学畜牧兽医学院,江苏扬州225009 [3]中国农业科学院家禽科学研究所,江苏扬州225003

出　　处：《中国兽医学报》2005年第1期19-21,共3页Chinese Journal of Veterinary Science

基　　金：江苏省高校重点实验室开放课题 (KJS0 10 5 6) ;江苏省"三药"创制基金课题 (99112 2 -12 )

摘　　要：分别用 0 .1× 10 4、1× 10 4、10× 10 4个 /只孢子化卵囊的剂量感染黄羽肉公雏 ,以临床症状、肉眼病变、平均增重、病变记分和死亡率为判定指标 ,对 11株 E.maxima的致病性进行了分析。结果表明 :各虫株引起的临床症状和各病死鸡的肉眼病变基本相似。各感染组的增重 (0 .1× 10 4组例外 )与对照组相比均有显著差异 (P<0 .0 5 )。在感染 10× 10 4个 /只的剂量时 ,上海株增重最少 ,苏州株和龙岩株增重最多 ;扬州株的病变记分最大 ,苏州株和龙岩株的最小 ,相比有显著差异 (P<0 .0 5 ) ;扬州株、连云港株、福州株、广州株和美国株引起鸡死亡 ,死亡率分别为 2 0 %、10 %、10 %、10 %和10 %。结论 :11个虫株均有致病性 ,扬州株和上海株的致病力较强 。Suqiu Yellow chickens were used to study the pathogenicities of eleven geographical strains of Eimeria maxima,assessed by clinical symptom,gross pathology,weight gain,lesion score and mortality.The results were as follows:The clinical symptoms and the gross intestinal pathology were similar in birds infected with all the strains and died of coccidiosis.The body weights in all infected groups were affected,and except the groups at 0.1×10~4/bird,the weight gains were significantly different from that of the control groups(P<0.05).When the dose was 10×10~4/bird,the weight gains were the lowest in groups infected with Shanghai strain and the largest in groups infected with Suzhou strain and Longyan strain,but there were no significant differences(P>0.05).And the lesion scores were the lowest in groups infected with Suzhou strain or Longyan strain and largest in groups infected with Yangzhou strain,but except Suzhou strain,there were no significant differences(P>0.05).The infections with Yangzhou strain,Lianyungang strain,Fuzhou strain,Guangzhou strain and USA strain at dose of 10×10~4/bird caused a mortality of 20%,10%,10%,10% and 10%,respectively.It suggested that Yangzhou strain and Shanghai strain were the highest pathogenic,and Suzhou strain and Longyan strain were the least pathogenic among all the strains.

关 键 词：增重 巨型艾美耳球虫 上海株 致病性 致病力 地理株 肉眼 感染 眼病变 死亡率 

分 类 号：R587.2[医药卫生—内分泌] S852.723[医药卫生—内科学]