不同禽源贝氏隐孢子虫分离株对雏鸡致病性比较研究  

Pathogenecity of Cryptosporidium baileyi isolates from different poultry hosts in chicken

作　　者：齐萌[1] 高庚渠[1,2] 黄磊[1] 徐利纳[1] 乔亚辉[1] 卫九健[1] 菅复春[1] 张龙现[1] 宁长申[1] 

机构地区：[1]河南农业大学牧医工程学院,河南郑州450002 [2]河南省质量工程职业学院国家食品安全检测科研中心,河南平顶山467000

出　　处：《中国兽医学报》2013年第5期701-705,共5页Chinese Journal of Veterinary Science

基　　金：国家自然科学基金资助项目(30371863)

摘　　要：为研究不同禽源贝氏隐孢子虫对雏鸡的致病性差异,人工感染3日龄雏鸡鸡源、鸭源、鹌鹑源、白文鸟源贝氏隐孢子虫。结果发现,各感染组雏鸡潜隐期均为4d,显露期为11～18d,均未发生死亡,但其增重均受影响。鸡源C.baileyi(林州株)、C.baileyi(郑州株)和鸭源C.bailey(郑州株)感染组雏鸡临床症状较为明显,发病率较高,分别为71.4%、85.7%和77.1%,剖检可见气管有较多粘液分泌物,法氏囊粘膜充血肿胀,平均增重较不感染对照组分别减少34.5、53.1和19.7g;鹌鹑源C.bailey(武陟株)和白文鸟源C.bailey(郑州株)感染组雏鸡仅部分表现轻微临床症状,发病率分别为31.4%和28.6%,平均增重较不感染对照组分别减少39.7和43.1g。结果表明不同禽源C.bailey对雏鸡均有不同程度的致病性,以鸡源和鸭源C.baileyi致病性较强。To understand the pathogenecity difference of Cryptosporidium baileyi from various birds in chickens,three-day-old chickens were inoculated Cryptosporidium oocysts from chicken, duck,quail,White Java sparrow,and ostrich. The results showed that the latent period was all 4 days and the patent period ranged from 11 to 18 days. No death was noticed, however, affact oc- curred in the gain of body weight. The infection groups by using chicken-derived C. baileyi （Liz- hou and Zhengzhou） and duck-derived C. baileyi had obvious clinical sympotems, with a higher morbidity of 71.4% ,85.7% and 77.1% ,respectively. Necropsy observation included more mucus secretion of trachea and mucosal congestion and swelling of the bursa of Fabricius. The average body weight reduced 34.5,53.1 ,and 19.7 g compared to the control groups. In contrast,the clinical syptotems were slight in the groups of quail-derived C. baileyi （Wuzhi） and White Java sparrow-derived C. baileyi （Zhengzhou） ,with the decrease of body weight gain reaching to 39.7 and 43. l g compared to the control groups, respectively. Thus, the present study indicated that various birds-derived C. baileyi isolates had different pathogenecity, with the chicken-derived and duckderived C. baileyi being higher.

关 键 词：贝氏隐孢子虫 雏鸡 致病性 

分 类 号：S858.31[农业科学—临床兽医学]