鸡线虫对雏鸡成活率及发育的影响

通过雏鸡人工感染鸡蛔虫和异刺线虫的试验证明，鸡蛔虫、异刺线虫单独或混合感染，对雏鸡的成活率及发育均有程度不同的影响。与不感染对照组相比，感染３００个／只蛔虫卵的雏鸡成活率低１９％（Ｐ＜０．０５），死亡峰期在感染后７～１４天，增重低３０．１％（Ｐ＜０．０１），影响增重峰期为感染后第１～１０和２１～４０天；感染同量异刺线虫卵雏鸡成活率低１０．３％（Ｐ＞０．０５），死亡主因是组织滴虫病，增重低１６．６％（Ｐ＜０．０５），影响增重峰期在感染后第１１～２０天，混合感染减半量的两种虫卵，成活率低１４％（Ｐ＜０．０５），增重低３２．９％（Ｐ＜０．０１），死亡及发育受阻期与单独感染蛔虫卵组相似，但部分鸡死于组织滴虫病；单独感染减半量蛔虫卵，成活率低１７．３％（Ｐ＜０．０５），增重低１０．１％（Ｐ＞０．０５），死亡及影响增重峰期基本在感染后第１～１０天。

EFFECTS OF NEMATODA ON VIABILITY AND BODY WEIGHT GAIN OF CHICKS

Using the artifical method to infect the Chicks with Ascaridia and Heterakis ova and compared with the uninfected group for this experiment.The infected groan 1. every chick is infected with 300 Ascaridis ova. The viability is decreased 19% (p<0.01), the body weight gain is decreased 30.1 % (p<0.01)The infected groan 2. as same as the group 1. but every chick is infected with 300 Heterakis ova, the viability is decreased 10.3% (p>0.05).the body weight gain is decreased 16.6 % (P<0 .05) .The infected group 3 is infected with both 150 Ascarjdia ova and 150 Heterakis ova, the viability is decreased 14% (p<0.05),the body weight gain is decreased 32.9% (p<0.01) .The group 4 is only infected with 150 Ascaridia ova, the viability is decreased 17.3% (p<0.05), the body weight gain is decreased 10.1% (p>0.05).