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<正>在集约化和规模化的现代养鸭业中,鸭的疫病防治是成效的关键。在众多鸭传染性疾病中,以危害7～20日龄雏鸭,病死率达50%～60%的鸭病毒性肝炎对养鸭场具有重大的经济影响[2]。1鸭病毒性肝炎的危害及流行病学鸭病毒性肝炎是雏鸭的一种高致病性的,传播迅速的病毒性传染病。 相似文献
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用鸭病毒性肝炎弱毒疫苗和因病毒性肝炎死亡鸭肝脏组织液制备油剂灭活疫苗,对高产蛋鸡进行多次强化免疫,收集所产的高免鸡蛋,试制抗鸭病毒性肝炎卵黄抗体液,用于防治雏鸭病毒性肝炎,效果良好,卵黄抗体液,用于防治雏鸭病毒性肝炎,效果良好,也能避免应用同源卵黄抗体液可能带来的疾病传播。 相似文献
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鸭病毒性肝炎是由鸭肝炎病毒引起的雏鸭急性败血性、高度致死性传染病,是危害养鸭业的主要传染病之一。冬春季节,雏鸭出孵后最易感染,文章详细综述了鸭病毒性肝炎的病原、流行特点、发病症状及防治措施。 相似文献
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鸭病毒性肝炎是由病毒引起的一种传播迅速．发病率、死亡率都较高的烈性传染病。该病毒主要侵害3周龄以内的雏鸭，对成年鸭和其它禽均无致病力。笔者在2000-2003年4年中，用中草药治疗雏鸭病毒性肝炎患雏六万多只．治愈率达80％-85％。 相似文献
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雏鸭病毒性肝炎诊治与预防 总被引：1，自引：0，他引：1
<正>雏鸭病毒性肝炎是由鸭肝炎病毒引起的3周龄以内雏鸭的1种急性、高度致死性传染病;有3种血清型,即Ⅰ、Ⅱ、Ⅲ型,我国主要流行的是Ⅰ型。该病的特征是发病急,传播迅速,死亡率高。在自然条件下,鸭病毒性肝炎只发生于雏鸭,3～25日龄的鸭最易感,发病率达100%。1周龄死亡率为95%; 相似文献
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<正>鸭病毒性肝炎病是由鸭病毒性肝炎病毒引起雏鸭的一种急性、烈性和高度致死性传染病,各品种的鸭均可感染,但多发于1～3周龄的雏鸭,尤其对1周龄以内的雏鸭危害性最大,成年鸭亦可感染但不发病,而成为此病的传染来源。该病给养鸭场造成严重的经济损失,大大挫伤了养殖户的积极性。现将一起小规模鸭场雏鸭暴发鸭病毒性肝炎病的诊治介绍如下,供同行参考。 相似文献
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Duck plague: clinical aspects, diagnosis, control 总被引：1，自引：0，他引：1
M Weingarten 《Tier?rztliche Praxis》1989,17(1):53-56
A predominantly acute, highly contagious disease of the waterfowl is called duck plague or virus enteritis of ducks. The pathogenic agent is a herpes virus, type A. The clinical course of the disease and its pathological-anatomical findings are described and the possibility of prophylactic immunization is discussed. The results of lab trials demonstrate the effectiveness of a vaccine against the duck plague. 相似文献
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通过用不同日龄的鸭胚接种EDS种毒,采用不同的孵化温度,比较鸭胚接种日龄及不同的孵化温度对抗原收获量及血凝价的影响。结果显示,用9日龄鸭胚接种明显优于其他日龄的鸭胚,抗原收获量及血凝价均达到较高水平;改变孵化温度(37～38℃),对鸭胚收获量及HA不会造成大的影响。 相似文献
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David P. Green 《Journal Of Aquatic Food Product Technology》2013,22(2):99-100
ABSTRACT The effects of sun drying at ambient temperature in the range of 24°C to 32°C; artificial drying at 35°C, 45°C, or 55°C; or artificial drying at 45°C after treatment with 10% brine, 20% brine, saturated (36%) brine, or dry salt at 28°C for 16 hours on the physical characteristics of the final dried Bombay duck (Harpodon neherius) were studied. Unsalted sundried fish was found unacceptable. Dry salting was more efficient in reducing the moisture level in fish than brining, but was found unsuitable by the panelists due the appearance of a powdered salt crust as the fish dries up. Bombay duck treated with 20% sodium chloride solution, artificially dried at 45°C, and kept in sealed polyethylene pouches was judged superior after sensory evaluation compared to unsalted sundried Bombay duck or unsalted artificial dried Bombay duck at 35°C, 45°C, and 55°C, or artificial dried samples at 45°C after treatment with 10% brine, saturated (36%) brine or dry salt, and kept in sealed polyethylene pouches, respectively, during storage. 相似文献
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选用1日龄健康樱桃谷肉鸭750只,随机分为3组,每组设5个重复,每个重复50只肉鸭,试验采用单因子完全随机试验设计。A组为对照组,饲喂基础日粮;B组、C组在基础日粮的基础上分别添加0.2%、0.4%的双乙酸钠。试验结果表明:日粮中添加双乙酸钠对肉鸭日增重有显著影响(P<0.05);对肉鸭的饲料转化率有极显著影响(P<0.01);对肉鸭的成活率无显著影响(P>0.05)。B组日增重比A组提高了8.65%(P<0.05),比C组提高了5.45%(P>0.05);B组料肉比较A组降低了11.52%(P<0.01),较C组降低了3.29%(P<0.05);B组的成活率与A组、C组间差异不显著(P>0.05);B组每只肉鸭分别比A、C组多盈利1.04元、1.06元。 相似文献
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选用1日龄健康樱桃谷肉鸭600只,随机分为3组,每组设4个重复,每个重复50只肉鸭,试验采用单因素完全随机试验设计。A组饲喂基础日粮,B组、C组在基础日粮的基础上分别添加0.2%、0.4%的双乙酸钠。试验结果表明:日粮中添加双乙酸钠对肉鸭日增重、瘦肉率有显著影响(P<0.05);对肉鸭的饲料转化率有极显著影响(P<0.01);对肉鸭的成活率和屠宰率、皮脂率无显著影响(P>0.05)。B组日增重比A组提高了8.65%(P<0.05),比C组提高了5.45%(P>0.05);B组料肉比较A组降低了11.52%(P<0.01),较C组降低了3.29%(P<0.05);B组的成活率与A组、C组间差异不显著(P>0.05);B组每只肉鸭分别比A、C组多盈利1.04元、1.06元。 相似文献
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Muhammad A. Latif Mohammad J. Alam Mohammad A. Rahman 《Journal of the World Aquaculture Society》1993,24(3):402-409
An experiment on integrated duck-cum-fish farming was conducted in 11 ponds of 0.1 ha each at the Fisheries Research Institute, Mymensingh, Bangladesh. Khaki Campbell layer ducks Anas platyrhychos were housed directly over the pond water surface at 200, 400 and 500 dncks/ha. Each density had three replicate ponds and two ponds had no ducks. Fish fingerlings were stocked at a total density of 8,850/ha. The species composition was silver carp Hypophthalmicthys molitrix 33.9%; catla Catla catla 12.4%; rohu Labeo rohita 18.1%; mrigal Cirrhina mrigala 28.8%. grass carp Ctenopharyngodon idella 1.4% and sor puti Puntius gonlonotus 5.4%. The fish were not given any supplemental feed, and the ponds were not fertilized except for the split duck feed and duck manure falling directly into the ponds. Ducks were fed with a feed formulated from locally available ingredients.
After one year the fish were harvested. The yield of fish increased with an increase in duck density. Highest net fish production of 4,250 kg/ha/yr was obtained from ponds with 500 ducks/ ha, compared to 490 kg/ha/yr from the control ponds. Manure of each duck contributed a net fish yield of 6.9–7.5/yr. Average egg production was 237 eggs per female duck per year. Economic analysis of the technology showed a net profit of about 100% of the total costs, indicating the economic viability of the technology. 相似文献
After one year the fish were harvested. The yield of fish increased with an increase in duck density. Highest net fish production of 4,250 kg/ha/yr was obtained from ponds with 500 ducks/ ha, compared to 490 kg/ha/yr from the control ponds. Manure of each duck contributed a net fish yield of 6.9–7.5/yr. Average egg production was 237 eggs per female duck per year. Economic analysis of the technology showed a net profit of about 100% of the total costs, indicating the economic viability of the technology. 相似文献
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在骡鸭与樱桃谷鸭的填肥料中添加4%玉米油或鸭油,研究添加动植物油脂填饲对鸭产肝性能的差异影响。结果表明:添加玉米油,与添加鸭油填饲相比,2个品种鸭获得较高的肝重与较低的料肝比,且骡鸭添加玉米油组的肥肝率显著高于鸭油组(高出30%);经填饲,骡鸭的肥肝重较樱桃谷鸭高,同时料肝比较低,但差异均不显著(P>0.05)。意味着肥肝生产中,填饲时添加玉米油较添加鸭油更利于提高产肝性能;并且对骡鸭更有效。对于其根本原因,需进一步从分子水平上研究鸭肝的生脂酶基因、与甘油三酯分泌及脂肪分解相关酶基因的表达差异。 相似文献
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T. R. MEYERS 《Journal of fish diseases》1983,6(3):277-292
Abstract. Both fingerling and adult rainbow trout were given intraperitoneal inoculations of the 131P2 reovirus which did not result in mortalities but produced a subclinical disease in 56% of the adults and in 65% of the juvenile fish. Sera from virus infected adult trout contained virus neutralizing and precipitating antibodies and demonstrated immunofluorescence of antigen(s) specific for the 13P2 virus. Virus infection was characterized by increased virus titres and a multifocal reticulo-endothelial granulomatous hepatitis, occasionally accompanied by a fibrosing pancreatitis. Electron microscopy of infected liver tissues demonstrated arrays of 13P2 virus particles in a reticuloendothelial cell phagosome and in a hepatocyte lipid inclusion body from one of three juvenile fish examined. These results show that 13P2 virus inoculation of rainbow trout causes a non-virulent virus infection accompanied by specific humoral antibodies. These antibodies are sufficient in titre for use in future serologic studies of the virus. Further discussion regarding the pathogenesis of this virus in bluegills versus rainbow trout is presented. 相似文献
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Efficacy of the paramunity inducer Baypamun (PIND-ORF) was evaluated by an IBR challenge trial in cattle, as one model for infectious diseases in bovine. Prophylactic treatment with Baypamun protected cattle against manifestation of clinical symptoms after experimental IBR infection. The degree of protection depended on the time between paramunization and challenge infection. Even in metaphylactically paramunized cattle Baypamun reduced the IBR symptoms. In correlation to the reduction of clinical symptoms paramunization also reduced virus excretion by more than 99% in treated cattle compared to non paramunized animals. The induction of interferon following IBR infection was investigated in paramunized cattle. Application of Baypamun enabled treated animals to react faster with interferon synthesis following IBR infection than control animals did. The demonstration of the status of paramunity following Baypamun application in cattle provides a concept in the prevention of infectious disease in the practice. 相似文献
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实验选取半番鸭作为实验对象。选取1日龄的生长情况基本一致的健康半番鸭200只,随机分为5组,进行对照试验,采用单因子试验设计,在5组半番鸭的日粮中分别添加木聚糖酶50g/t、100g/t、150g/t、200g/t和0g/t,试验为期45d。结果表明:在半番鸭的日粮中添加合适的木聚糖酶剂量,满足其正常的生长发育所需要的环境条件,自由采食和自由饮水,并且搞好饲养管理,半番鸭就能够进行正常的生长发育。最后通过经济效益分析,在半番鸭的日粮中添加150g/t的木聚糖酶可明显的改善半番鸭的生产性能,从而提高饲料的利用率,降低饲养成本。 相似文献