推荐回答(5个)
鸡大肠杆菌病是由某些致病性血清型大肠杆菌引起的鸡不同类型疾病的总称。特征是引起鸡的心包炎、肝周炎、气管炎、腹膜炎、眼球炎、关节炎及输卵管炎、肉芽肿等。该病是鸡胚胎和雏鸡死亡的重要病因之一。
(1)流行特点 本病常发生于各种年龄的鸡,但多发生于雏鸡,特别是3~6周龄内的雏鸡最易感,而肉鸡较蛋鸡更易感。最主要的传染途径是呼吸道,但也可通过消化道、蛋壳、交配等感染。本病一年四季均可发生,但以冬春寒冷和气温多变季节多发。常与慢性呼吸道病、新城疫、传染性与气管炎、支原体病、传染性法氏囊病、曲霉菌病、葡萄球菌病、球虫病等混合感染。
(2)主要症状和剖检病变 鸡大肠杆菌病无特征临床症状。疾病的表现与其感染时的日龄、感染持续时间、受侵害的组织器官以及是否并发其他疾病有关。共同表现为精神沉郁,食欲下降,羽毛粗乱,消瘦。侵害呼吸道后会出现呼吸困难,黏膜发绀;侵害消化道后会出现腹泻,排绿色或黄绿色稀便;侵害关节后表现为跗关节或趾关节肿大,病鸡跛行;侵害眼时,眼前房积脓,有黄白色的渗出物;侵害大脑时,出现神经症状,表现头颈振颤,角弓反张,阵发性发作。
因大肠杆菌侵害的部位不同,剖检变化也不同。败血症病鸡表现突然死亡,皮肤、肌肉淤血,血凝不良;肝脏肿大,呈紫、红色或绿色,表面散布白色的小坏死灶;肠黏膜弥漫性充血、出血,整个肠管呈紫色。纤维素性心包炎型病鸡病表现心包膜混浊、增厚,心包腔内有脓性分泌物,心包膜及心外膜上有纤维蛋白附着,呈白色。肝周炎型病鸡表现肝肿大,表面有一层黄白色的纤维蛋白附着;肝脏变硬,表面有许多大小不一的坏死点;严重者可见肝脏渗出的纤维蛋白与胸壁、心脏、胃肠道粘连。气囊炎型表现气囊混浊、增厚,内有黄色干酪样附着物。关节型多在附关节周围呈竹节状肿胀,关节液混浊,关节腔内有纤维蛋白渗出或出现浓汁。眼炎型则表现单侧或双侧眼肿胀,有干酪样渗出物,眼结膜潮红,眼房水和角膜混浊。卵黄腹膜炎及输卵管炎型可见腹腔内充满淡黄色腥臭的液体或破坏的卵黄,腹腔脏器表面覆有一层淡黄色凝固的纤维素性渗出物;发生广泛性腹膜炎;卵巢中的卵泡变形,皱缩,色泽异常;输卵管变薄、扩张,管腔内有干酪样物质堵塞。雏鸡脐炎型则表现脐带呈蓝紫色,脐带孔潮湿、发炎、红肿,卵黄囊吸收不良。有的病鸡则兼有以上两种或多病型的病变。
(3)防治 鸡大肠杆菌病病因复杂,必须采取综合性防治措施才能加以控制。一般性预防措施是搞好鸡舍环境卫生,定期消毒,加强饲养管理,及时淘汰处理病鸡,建立科学的免疫程序,育雏期适当在饲料中添加抗生素药物均有利于对本病的控制。改变商品肉用仔鸡的饲养方式,推行前半期(1~4周)棚架或网上平养或笼养,后半期(5~8周)地面饲养的方式,可降低肉仔鸡的大肠杆菌病的发病率。
疫苗免疫因大肠杆菌血清型较多有一定的局限性。较为实用的方法是常发病的鸡场,可从本场病鸡中分离致病性大肠杆菌制成自家(或优势菌株)多价灭活佐剂疫苗,在雏鸡7~15日龄、25~35日龄及种鸡120~140日龄各免疫一次,对减少本病发生具有较好的效果。
用于防治本病的药物较多,如氨苄青霉素、金霉素、新霉素、庆大霉素、土霉素、多黏菌素B、壮观霉素及喹诺酮类药物。但鸡大肠杆菌致病性菌株多,对药物敏感性不一致,经常使用会产生耐药性,尤其是那些长时间广泛使用的药物。因此,有条件的必须先进行药敏试验,尽量选择高度敏感的药物,或者选用过去很少用过的药物进行全群治疗,且注意交替用药,同时药物剂量要充足,病情控制后并注意巩固1~3天。
生产中可交替用以下药物:0.2%土霉素粉拌料,连用3~5天;0.1%氟哌酸拌料,连用5~7天;0.005%环丙沙星或恩诺沙星饮水,连用3~5天;0.02%甲砜霉素或氟苯尼考拌料或饮水,连用5~7天。
治鸡大肠杆菌可以用 禽肠欣(成都兴旺),本品主治家禽常见大肠杆菌病、禽副伤寒、雏鸡白痢、球虫病继发肠道感染、肠毒综合症、坏死性肠炎等。
【用法用量】
混饮:每袋100g兑水200-250kg,集中饮用,连续3-5天。
混饲:每袋100g拌料100-150kg,每天两次,连用3-5天。
预防:该药用于预防疾病时,用量需相对减半。
鸡子得住大肠杆菌病有什么特征?该怎么治疗?听听农村大爷怎么说
大肠杆菌最好的治疗药品可以使用氟苯尼考配合盐酸多西环素配伍,治疗大肠杆菌的绝配。能够有效治疗禽类的大肠杆菌疾病。简单易懂,而且药品也比较好买,要选择大厂家正规的药品。准确地确诊也是治疗的保证哦,可以随时咨询天喵奥迪尔哦
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