精品禽副伤寒课件

禽副伤寒 禽 伤 寒 副 禽副伤寒是指除鸡白痢 和禽伤寒以外，由其他沙门 氏菌感染引起的传染病的总 称，各种家禽均可感染。 禽 伤 寒 副 流行特点 禽 伤 寒 副 本病主要危害1月龄内的幼 禽，可造成雏鸡、雏鸭和雏鹅 的大批死亡，致死率10% 20%，成禽则为慢性或隐性感 染。既可经卵传播，也可经消 化道传播。鼠、鸟、昆虫也能 传播本病。 禽 伤 寒 副 症状 n出壳2周龄以内呈急性经过，日龄较大为亚 急性经过。病鸡表现为嗜睡，食欲大减， 水样腹泻，消瘦，衰竭死亡。病死率与管 理和日龄大小有关。 多数病禽精神不振，被毛逆立，嗜睡 禽 伤 寒 副 最急性经过的雏禽， 一般看不到症状突然死亡 禽 伤 寒 副 排白色水样粪便 禽 伤 寒 副 肛周羽毛被污染 禽 伤 寒 副 跗关节和趾关节红肿（6日龄雏鸡） 禽 伤 寒 副 病变 雏鸡副伤寒与鸡白痢相似，有时 难以区别。10日龄内死亡者多没 有明显病变。 禽 伤 寒 副 病变 n肝脾出血呈青铜色，有坏死灶，心包 炎，肠出血性炎症，慢性者肠壁增厚 。 偶尔可见肝脏颜色变浅，胆囊充盈，脾脏 肿胀 禽 伤 寒 副 卵黄吸收不良，肝脏黄染 禽 伤 寒 副 卵黄吸收不良，内容物凝固 禽 伤 寒 副 病程较长者表现消瘦、脱水 肝肿胀、淤血、出血 禽 伤 寒 副 有暗红色与黄白色相间 的条纹及针尖状出血点 禽 伤 寒 副 肝脏有白色坏死灶 禽 伤 寒 副 有时可见纤维素性肝周炎和心包炎 禽 伤 寒 副 脾肿大，有出血斑、坏死点 或两种病变同时存在 禽 伤 寒 副 7日龄雏鸡肺、肾出血 禽 伤 寒 副 盲肠内有干酪样栓子 禽 伤 寒 副 胰腺有灰白色坏死灶 禽 伤 寒 副 防治防治 参见鸡白痢参见鸡白痢 禽 伤 寒 副 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