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雏鸡传染性脑脑脊髓炎的治疗措施
雏鸡传染性脑脑脊髓炎的治疗措施
作者:佚名 来源:本站整理 点击数:8482 更新时间:2010-06-23【字体:

鸡传染性脑脊髓炎主要危害1月龄以下的雏鸡。成鸡感染本病后,一般不表现症状,仅有2周左右产蛋减少,然后恢复正常。雏鸡感染本病后,主要特征症状为腿软无力瘫痪和头颈震颤,如不及时治疗,会造成大批死亡,给养鸡业造成巨大的经济损失。现将一起雏鸡暴发鸡传染性脑脊髓炎的诊治情况报道如下。 

  一、发病情况 

  某养鸡场,购进雏鸡2 500只。进雏后第2天有几只雏鸡发生脚软,以后逐日增多,养到第7天约有200只鸡发生软脚。这些病鸡大多因行动不便被踩死或因吃不到饲料,饮不到水而衰弱死亡。该养鸡户已养鸡多年,经验丰富,且饲养业绩一直很好。从进雏当日起,开始在饲料中添加多种维生素,以恩诺沙星等给雏鸡饮水。雏鸡出现软脚时,立即添加治疗量的维生素B1、维生素B2、维生素E和鱼肝油、氟哌酸等,但均不能控制病情。后到我院诊治,通过诊断治疗,疫情很快得到控制。随后对供应该雏鸡的种鸡场进行调查,发现其免疫程序中未采用鸡传染性脑脊髓炎疫苗进行免疫接种。 

  二、症状 

  病鸡精神较差,闭目嗜睡,继而出现运动失调,两腿不能自主,走动时东倒西歪,逐渐不能站立,以跗关节着地,坐于地面,呈犬坐姿势。随着病情的发展,神经症状明显,常出现头颈震颤,最后瘫痪。个别雏鸡一侧或两侧眼睛晶状体混浊,视力消失。瘫鸡仍有食欲和饮欲,但由于不能站立,吃不到饲料,饮不到水而被其他鸡踏死或饿死。 

  三、剖检病变 

  共剖检病死雏鸡25只,主要病变为脑组织水肿,在脑膜下有水样透明感,脑膜上有出血点或出血斑,着地的跗关节红肿,腿部皮下有胶冻样渗出液。其他脏器未见明显变化。 

  四、实验室检验 

  1. 取病(死)鸡的心血、肝、脾组织涂片做革兰氏和瑞氏染色,镜检未发现细菌。 

  2. 取病料以营养琼脂作细菌培养,未见细菌生长。 

  3. 琼脂扩散试验。采取发病雏鸡的血20份,分离血清,用已知的传染性脑脊髓炎抗原进行琼脂扩散试验,测定血清中抗体,结果病雏鸡血清18份均出现沉淀线。 

  根据发病情况、临床症状、剖检变化和实验室检验结果,诊断为鸡传染性脑脊髓炎。 

  五、防治措施 

  1. 确诊后,淘汰病死鸡,深埋处理,整个鸡场内外环境及用具彻底消毒。鸡场外环境用3%烧碱消毒,鸡舍用具用绿威霸消毒液消毒,每天1次,连续10天。 

  2. 加强饲养管理,饲料内增加多种维生素、维生素AD3粉、维生素E,以增加鸡体抗病力。 

  3. 治疗:饮水中加板蓝根冲剂,每袋15克,每100只雏鸡1袋,每天2次,连用5~7天。同时在饲料中添加0.3%盐酸吗啉双胍。为防止继发感染,同时还在饲料内添加0.2%土霉素,连用5~7天。经采取以上防治措施后,病情很快得到控制,鸡群逐渐恢复正常。  
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