家禽免疫力低下的原由及症状表现
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">随着家禽养殖业的集约化发展，人们对行业的投资疾速增大，相对应的对家禽的生产性能和投资<span style="color: black;">报答</span>率的期望<span style="color: black;">亦</span>愈来愈高。<span style="color: black;">疾患</span>是影响生产性能<span style="color: black;">可否</span>能够正常发挥的<span style="color: black;">要紧</span><span style="color: black;">原因</span>，而家禽<span style="color: black;">自己</span>免疫力的高低决定着发病率的高低。本文将对<span style="color: black;">导致</span>家禽免疫力低下的<span style="color: black;">原由</span>及免疫力低下的症状表现进行分析，<span style="color: black;">期盼</span><span style="color: black;">能够</span><span style="color: black;">导致</span><span style="color: black;">大众</span><span style="color: black;">注意</span>、采取<span style="color: black;">办法</span>，取得较好的养殖效益。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><img src="//q8.itc.cn/images01/20240330/fd3045a53eea4b459dd5e4c1e6529548.jpeg" style="width: 50%; margin-bottom: 20px;"></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">1、</span>免疫力低下的表现</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">1、肉鸡症状</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">①生长<span style="color: black;">生长</span>缓慢，出栏时间延长，料重比增大，成本<span style="color: black;">提升</span>；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">②个体<span style="color: black;">生长</span>不匀<span style="color: black;">叫作</span>，<span style="color: black;">不可</span>实现真正的“全进全出”，影响年出栏数；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">③羽毛灰暗凌乱，鸡喙、爪、腿颜色淡，卖相<span style="color: black;">不良</span>，价格被压；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">④精神状态<span style="color: black;">不良</span>，类似“病态”，价格被压，利润直接流失。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><img src="//q4.itc.cn/images01/20240330/2f422af210d94748bbeb90706c9da29a.jpeg" style="width: 50%; margin-bottom: 20px;"></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">2、蛋禽症状</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">①产蛋率增长不快，推迟产蛋高峰，少产蛋；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">②产蛋高峰期<span style="color: black;">连续</span>时间短，产蛋减少；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">③次品蛋多如<span style="color: black;">没</span>壳、薄壳，有效产蛋率不高；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">④蛋清稀薄，蛋黄质量不高，蛋重下降，利润直接流失；</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">⑤种蛋受精率、孵化率很不稳定，鸡雏质量不高，投诉率高。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">2、</span><span style="color: black;">导致</span>家禽免疫力差的亚健康<span style="color: black;">原因</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">1、霉菌毒素</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">黄曲霉毒素<span style="color: black;">是由于</span>曲霉菌属霉菌产生，其中毒性最大、<span style="color: black;">科研</span>得最多的是AFB1；<span style="color: black;">一般</span>所说的黄曲霉毒素<span style="color: black;">重点</span><span style="color: black;">指的是</span>AFB1。黄曲霉的毒素<span style="color: black;">功效</span><span style="color: black;">包含</span>致癌，<span style="color: black;">控制</span>细胞DNA和RNA合成，<span style="color: black;">拥有</span>细胞毒性，破坏机体凝血机制和酶类等。对动物的<span style="color: black;">重点</span>影响是致肿瘤、免疫<span style="color: black;">控制</span>、致突变和致畸，<span style="color: black;">重点</span>靶器官是肝脏, 可<span style="color: black;">导致</span>肝脏<span style="color: black;">流血</span>、肝脏脂肪变性、胆管增生等, 并可<span style="color: black;">引起</span>肝癌的<span style="color: black;">出现</span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><img src="//q0.itc.cn/images01/20240330/135c3e3da8a54c8696046cfe576af44f.jpeg" style="width: 50%; margin-bottom: 20px;"></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">2、免疫<span style="color: black;">控制</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">免疫<span style="color: black;">控制</span>是一种暂时或永久性的机体免疫应答<span style="color: black;">错乱</span>状态，它由免疫系统的损害而产生并<span style="color: black;">引起</span>对<span style="color: black;">疾患</span>易感性的<span style="color: black;">增多</span><span style="color: black;">因此呢</span>，常<span style="color: black;">引起</span>死淘率大幅<span style="color: black;">提升</span>，生产性能<span style="color: black;">明显</span>下降。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">3、营养缺乏</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">某些营养素的缺乏<span style="color: black;">能够</span>直接影响免疫系统的<span style="color: black;">生长</span>和功能。例如微量元素：缺硒可影响免疫系统的<span style="color: black;">生长</span>与功能，降低细胞、体液及非特异性免疫功能，<span style="color: black;">引起</span>不同程度的免疫<span style="color: black;">控制</span>而造成病毒病的<span style="color: black;">出现</span>。缺铁可<span style="color: black;">导致</span>雏鸡胸腺萎缩，脾脏、法氏囊重量<span style="color: black;">明显</span>降低等，T 淋巴细胞数量减少，中性粒细胞杀菌能力降低，<span style="color: black;">引起</span>机体抗感染能力降低；<span style="color: black;">也</span><span style="color: black;">或</span>缺乏维生素A 缺乏可使消化道和<span style="color: black;">呼气</span>道黏膜受到<span style="color: black;">损害</span>，局部黏膜免疫系统功能低下。对慢性呼 吸道病、传支等<span style="color: black;">呼气</span>道病的抵抗力显 著降低。<span style="color: black;">通常</span>说来，在营养与免疫之间出现两种类型的相互<span style="color: black;">功效</span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><img src="//q6.itc.cn/images01/20240330/54708d5d11cf4f6e8bf5334699a9b380.jpeg" style="width: 50%; margin-bottom: 20px;"></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;">4、鸡舍管理</strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">管理中诸如空气流通、鸡的密度、鸡舍<span style="color: black;">前提</span>、每日鸡群鸡舍的清空与清洗等都可能对鸡群免疫力产生<span style="color: black;">消极</span>的影响，并<span style="color: black;">导致</span>鸡场应激的<span style="color: black;">增加</span>。</p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;">清除饲料中霉菌毒素是解除家禽亚健康的前提。构建并强化生物安全体系是阻断免疫<span style="color: black;">控制</span>病传播的前提。全价的饲料、易消化吸收的营养是解除家禽亚健康(健康养殖)的<span style="color: black;">基本</span>。<span style="color: black;">提高</span>养殖管理水平是<span style="color: black;">有效</span>健康养殖、解除家禽亚健康的<span style="color: black;">重要</span>。健肠护肠是降低肠道病、解除亚健康的<span style="color: black;">要紧</span>途径。<a style="color: black;"><span style="color: black;">返回<span style="color: black;">外链论坛：http://www.fok120.com/</span>，查看<span style="color: black;">更加多</span></span></a></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">......</span></p>
我完全赞同你的观点，思考很有深度。
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