猪萎缩性鼻炎产毒多杀性巴氏杆菌二联苗应用效果

试验应用猪萎缩性鼻炎产毒多杀性巴氏杆茵二联灭活苗对猪进行一次免疫(7日龄)与两次免疫(7日龄、28日龄),并对两种免疫的效果进行了比较。结果表明：7日龄首免(1mL／头),28日龄二免(2mL／头),可产生较强的免疫保护力,萎缩性鼻炎的临床发病率由51．39％降到8．33％,猪的增重加快,料重比下降,肥育期缩短,外贸猪的比例提高。     

猪传染性萎缩性鼻炎二联灭活苗的应用

猪传染性萎缩性鼻炎(简称AR)是一种猪上呼吸道的慢性、渐进性的传染病,其病原主要有支气管败血波氏杆菌(Bb)和产毒多杀巴氏杆菌(pm),它们在鼻腔混合感染造成病患。Bb首先在鼻腔粘膜上皮感染繁殖,破坏鼻腔粘膜,然后D型产毒巴氏杆菌更容易繁殖并产生毒素,此后这两种菌持续在鼻腔内繁殖,造成严重的持续性病灶。另外,D型巴氏杆菌的毒素对肝脏造成退行性病变。AR临床症状为打喷嚏、鼻有分泌物、发鼾声等鼻     

猪传染性萎缩性鼻炎的诊断

1987年1月,我省某猪场突然暴发一种以打喷嚏、吸气困难、生长迟滞、流清鼻涕为主要临床表现的传染病。病猪大部分为奶猪,发病率为76.7%,个别猪只死亡。为此,我们进行了诊断和调查,最后确诊为猪传染性萎缩性鼻炎。报道如下。     

猪传染性萎缩性鼻炎的防控措施

猪传染性萎缩性鼻炎是一种慢性呼吸道传染病,病原体是支气管败血波氏杆菌和产毒素多杀性巴氏杆菌,病菌可损害猪体正常的呼吸道功能,降低病猪的抵抗力,造成发育迟缓、饲料报酬低,给养殖业带来经济损失.因此,本文主要就猪传染性萎缩性鼻炎的流行特点、临床症状、病理变化和防治措施进行简述,以提高对该病的认识和防治水平.     

我国猪萎缩性鼻炎流行现状调查

为了解我国猪萎缩性鼻炎的流行现状,采用鼻甲骨病变评分方法对我国12个省市24个规模化养殖场的上市猪及死淘猪的鼻甲骨病变状况进行诊断评估。数据显示:100%的猪场感染萎缩性鼻炎,97.81%的样品出现鼻甲骨病变情况。结果表明,猪萎缩性鼻炎在我国广泛流行,且北方及东部地区感染情况更为严重,急需加强防控。     

猪传染性萎缩性鼻炎的防治

猪传染性萎缩性鼻炎主要是由支气管败血波氏杆菌引起的一种慢性呼吸道传染病。该病可使猪生长性能、饲料利用率和机体抵抗力下降 ,极易诱发其他疾病 ,发病严重的猪比正常猪多耗料达 2 0 %左右。笔者在湖南长沙某猪场发现猪萎缩性鼻炎感染严重、发病率高。经采取综合措施对该场进行防治 ,取得显著疗效。现就主要症状及防治措施报道如下。1　主要症状2 0 0 2年 4月我们进驻该场时 ,部分仔猪、育肥猪及少数种猪均表现喷嚏、鼻塞、异常呼吸音等鼻炎症状及颜面泪斑和变形歪斜 ,严重的有鼻甲骨萎缩、流鼻血等现象。同时整个育肥猪群呼吸道疾病严重…     

猪传染性萎缩性鼻炎的防制

猪传染性萎缩性鼻炎的防制童光玉（湖北省黄石市挹江畜牧发展公司，４３６２０４）１背景猪传染性萎缩性鼻炎（简称ＡＲ）是普遍发生的猪慢性呼吸道传染病，不仅影响日增重，降低饲料报酬，延长饲养周期，严重影响养猪经济效益，而且还严重影响外贸猪场出口声誉。８０年代...     

广东地区猪传染性萎缩性鼻炎流行病学调查

为了解广东地区猪传染性萎缩性鼻炎(AR)的流行情况,本研究采用细菌分离、鼻甲骨组织形态学测定(TPR值)等方法,对广东各区14个规模在500头母猪的养猪场随机抽样进行AR的流行病学调查。试验统计数据显示,调查的14个猪场均存在AR,平均发病率为58.58%,平均支气管败血波氏杆菌(Bb)感染率为46.74%;抽样猪场中猪的萎缩指数平均数为1.286,萎缩指数标准差为1.871。结果表明,AR在广东省广泛流行,Bb感染率高。     

猪传染性萎缩性鼻炎综合防制研究报告

以生物安全体系理论为依据，对一年出栏７０００多头猪，患传染性萎缩性鼻炎的猪场进行治疗、免疫接种、加强卫生管理等综合性防制，经半年的试验，取得了十分显著的效果。使总患病率下降８６．９２％；公猪和母猪的治愈率为９０．７４％；７０日龄仔猪的平均体重提高６．２２％，料肉比下降７．１７％，成活率提高 ３．１６％；育肥猪的日增重提高 ４．３４％，料肉比下降５．６６％，成活率提高１．５６％，残次率下降７６．４８％。     

猪萎缩性鼻炎凝集反应抗原的制备及应用

为快速地诊断猪萎缩性鼻炎及监测其免疫状况,本试验在对支气管败血波氏杆菌保存菌种进行复苏和全面鉴定的基础上,制备了猪萎缩性鼻炎凝集反应抗原,经凝集反应试验表明,该抗原在PBS中不发生自凝,与猪传染性胸膜肺炎、猪喘气病和猪瘟的阳性血清均无凝集反应,而对猪萎缩性鼻炎标准阳性血清的凝集效价高达1∶10 240以上,具有较高的特异性和敏感性;对20份免疫母猪所产仔猪血清样本进行检测,检出率为95%.     

Estimation of genetic parameters of feed intake and daily gain in Durocs using data from electronic swine feeders

Genetic parameters for daily feed intake (DFI, g/day) and daily gain (DG, g/day) were estimated using records of 1916 Duroc boars from electronic feeder stations. Management was limited and resulted in varied ranges of age and weight on test. Boars were housed in 102 pens, each equipped with one feeder, and allowed ad libitum feeding. Weekly averages of DFI and DG were used due to large variation in daily records. Six traits were defined as DFI and DG during 85–106 (period 1), 107–128 (period 2) and 129–150 days of age (period 3). A six‐trait model included age as a linear and a quadratic covariate for DFI and a linear covariate for DG with a fixed effect of year–week–pen and random effects of litter, additive genetic animal and permanent environmental animal. Variance components were estimated by a Bayesian approach using Gibbs sampling algorithm. Estimates of heritability for respective periods were 18%, 12% and 10% for DFI and 21%, 11% and 10% for DG. Genetic correlations between DFI and DG in the same period were 0.70, 0.73 and 0.32 for the respective periods. DFI and DG obtained from automatic feeders can be analysed to reveal variation across testing periods by using weekly averages when many monthly averages are incomplete.     

Effect of Immunization against Somatostatin (SS) in Cattle: A Review of Performance,Carcass Composition and Possible Mode of Action

Abstract

A review of the effects of immunization against somatostatin in cattle is given. In most experiments (8 out of 9; no information in 2), significant antibody formation was reported in immunized animals but antibody formation may vary between individuals. Only a few have reported data on antibody affinity, but available data indicate that the antibodies formed may act to neutralize SS rather than function as binding proteins. Meta-analysis on weighted group averages showed that anti-SS animals consumed 4.2 ± 1.4% more feed (P = 0.03), had a 11.4 ± 2.3% higher daily gain (P < 0.001) and had a 4.7 ± 2.1% lower feed conversion ratio (P = 0.06), indicating improved feed efficiency. Increased fat deposition has been observed following immunization against SS, but more studies are needed in order to quantify the changes. Immunization does not seem to affect dressing percentage or carcass conformation score. The mode of action of immunization against SS seems to be associated with IGF-I and not GH, but more studies are needed to clarify fully the mechanisms by which immunization modifies performance in cattle.     

日粮添加可直接饲喂微生物对生长肥育猪生产性能的影响

试验选用 12 0头 80日龄 ,体重约 2 5kg的三元杂交 (杜×长×大 )商品代瘦肉型生长肥育猪 ,随机分为 2组 ,分别设为对照组和试验组 ,每组两个重复 ,每个重复 30头猪 ,对照组饲喂基础日粮 ,试验组饲料在对照组日粮基础上添加可直接饲喂微生物。经过 31d的饲养试验 ,结果表明 :①试验组猪只的日增重比对照组提高 6 .0 7% (P <0 .0 5 ) ,料肉比比对照组提高 3.2 8% (P >0 .0 5 ) ;②经济效益 ,试验组猪只提高了 8.11% ;③试验组猪只的腹泻率较对照组降低 5 .6 7%。     

抗菌肽制剂替代血浆蛋白粉对断奶仔猪生长性能及健康状况的影响

本试验选用体重相近(约6.5 kg)断奶前5 d的哺乳仔猪(杜×长×大三元杂)60头,随机分为对照组和试验组,每组3个重复,研究应用抗菌肽制剂替代教槽料中血浆蛋白粉对仔猪生长性能以及健康程度的影响。结果表明:与添加血浆蛋白粉的教槽料相比,添加2%抗菌肽制剂组断奶仔猪日增重提高8.06%(P>0.05),饲料转化率改善4.38%,同时腹泻减少47.78%,眼角分泌物减少15.18%。这说明抗菌肽制剂能有效缓解断奶仔猪的早期应激综合症问题,是血浆蛋白粉良好的替代品。     

不同配方日粮对35日龄断奶仔猪饲喂效果观察

选择９６头三元杂交仔猪分为两组，试验组饲喂以新技术配制的日粮，对照组喂常规日粮。结果表明，断奶前两组生产性能没有显著差异，断奶后一周，试验组日增重提高９７ｇ（Ｐ＜０．０５），每千克增重少耗料０． ２２ｋｇ（Ｐ＞０． ０５），腹泻率降低 １１． ２４％。对照组的断奶应激对以后的生产性能产生一定影响。     

杜泊羊、萨福克羊、无角陶赛特羊与小尾寒羊杂交优势利用研究

试验选杜寒F1、杜寒F2、萨寒F1、陶寒F1以及小尾寒羊共54只（3月龄断奶公羔），按对等原则分组，每组10～12只。研究探讨同一营养水平条件下，全颗粒料饲喂，对不同杂交育肥羔羊产肉力及肉品质的影响。结果表明：杜寒F1平均日增重313g，饲料报酬5．17：1，比小尾寒羊分别提高12．59％和10．71％；比萨寒F1提高14．23％和12．82％；比陶寒F1提高10．99％和l6．34％（P〈0．05）；比杜寒F2高出11．79％和3．7％。杜寒F1、杜寒F2、萨寒F1和陶寒F1屠宰率分别比小厄枣羊提高1．8、5．9、1．5和2．5百分点；净肉率分别比小尾寒羊提高4．6、4．2、3．1和3．1百分点。杜寒F1、杜寒F2和陶寒F1眼肌面积均大于小尾寒羊（P〈0．05）；大理石纹萨寒F1〉杜寒F1〉杜寒F2〉陶寒F1〉小尾寒羊。肌肉的剪切值则杜寒F2〈陶寒F1〈杜寒F1〈小尾寒羊〈萨寒F1。饲养1只杜寒F1与杜寒F2肥羔羊，按试验期平均增重25kg计算，比小尾寒羊增收26元和12．75元。