间接法Dot－ELISA检测副鸡嗜血杆菌的研究

本文首次成功地建立了检测副鸡嗜血杆菌（ｈｐｇ）抗原的间接法Ｄｏｔ－ＥＬＩＳＡ。Ｈｐｇ抗原的最低检出量为３．９１×１０￣５ＣＦＵ／ｍｌ。Ｈｐｇ人工感染样本的抗原阳性检出率为：口咽试子９５．５％；鼻窦及眶下分泌物拭子９０．９％。经统计学分析，二者在５％显著水平无显著差异。人工感染后４天及８天口咽拭子的抗原阳性检出率分别为１００％和９５．５％。经统计学分析，二者在５％显著水平无显著差异。Ｈｐｇ自然感染样本的抗原检出率为：口咽拭子８１．７％，鼻分泌物拭子７７．８％，眶下窦分泌物拭子７６．９％。间接法Ｄｏｔ－ＥＬＩＳＡ检测抗原经济、快速、操作简便，有较好的敏感性、特异性和重复性，能有效检出Ｈｐｇ人工及自然感染病鸡的带菌菌况，适合于大规模抗原样本的检测，可以用作疫病早期诊断和进行流行病学调查。     

单抗阻断ELISA检测副鸡嗜血杆菌血清型特异性抗体的研究

本研究在副鸡嗜血杆菌Ａ、Ｃ型特异性单克隆抗体的基础上成功地建立了能区分Ａ、Ｃ血清型抗体的阻断ＥＬＩＳ诊断方法,并应用此法对９种常见病原体阳性血清及多份免疫鸡。     

间接法Dot—ELISA检测副鸡嗜血杆菌的研究

本文首次成功地建立了检测副鸡嗜血杆菌抗原的间接法Ｄｏｔ－ＥＬＩＳＡ，Ｈｐｇ抗原的最低检出量为３．９１×１０＾５ＣＦＵ／ｍｌ。Ｈｐｇ人工感染样本的抗原阳性检出率为：口咽试子９５．５％；鼻窦及眶下分泌物拭子９０．９％。经统计分析，二者在５％显著水平无显著水平无显著差异。人工感染后４天及８天口咽拭子的抗原阳性检出率分别为１００％和９５．５％。经统计学分析，二者在５％显著水平无显著差异，Ｈｐｇ自然感染样本     

副鸡嗜血杆菌人工感染鸡抗体动态的研究

本研究采用阻断ELISA（B－ELISA）和血凝抑制试验（HI）方法,检测了鸡体分别人工感染副鸡嗜血杆菌Hp8株（A型）和H668株（C型）后0－9周的血清抗体消长情况,并绘制了示意抗体曲线。结果表明,Hp8人工感染后,从第2周到第9周,B－ELISA阳性检出率一直保持100％,其中抗体效价在感染后第4周达到效价高峰,平均约为15．2。而H688人工感染鸡则在感染后第7周检出率最高,此后急剧下降。AI方法对A型抗体的阳性检出率亦在在第4－5周达到高峰,而对C型抗体的检出率一直较低。结果进一步显示了B－ELISA良好的特异性和敏感性,为本方法及其试剂盒产品的进一步应用提供了参考。     

副鸡嗜血杆菌种特异性的核酸探针

副鸡嗜血杆菌种特异性的核酸探针陈小玲Ｊ．Ｋ，Ｍｉｆｌｉｎ张培君Ｐ．Ｊ．Ｂｌｅｃｋａｌｌ（北京市农业科学院畜牧兽医研究所北京，１０００８１）鸡传染性鼻炎（ＩＣ）是由副鸡嗜血杆菌（Ｈｐｇ）引起的呼吸道传染病。其危害主要在于影响鸡的生长和使鸡产蛋率下降。诊...     

A C型副鸡嗜血杆菌免疫鸡血清抗体动态观察

副鸡嗜血杆菌 ( Hpg)是引起鸡传染性鼻炎 ( IC)的病原体。其感染鸡群后 ,引起蛋鸡产蛋率下降、生长发育鸡群的生长受阻及淘汰率的增加 ,并易继发或并发其他传染病造成更严重的后果 ,从而引起很大的经济损失。本菌通常分为 A、B、C 3个血清型 ,由于各型均能致病且现有疫苗无型间     

培养副鸡嗜血杆菌用干粉培养基的优化研究

优化副鸡嗜血杆菌干粉培养基配方。通过单因素平行对比配方中碳源、血清、辅酶等营养物质,确定各个因素对副鸡嗜血杆菌生长的影响。研究筛选出了适宜副鸡嗜血杆菌生长的干粉培养基配方：鸡肉蛋白胨、酪胨、多价胨、酵母粉、葡萄糖等,再添加7.5%鸡血清和10 mg/L辅酶Ⅰ,于37℃、5%CO₂恒温培养箱中160 r/min振荡培养14～16 h。优化后的配方更适于培养副鸡嗜血杆菌,为副鸡嗜血杆菌疫苗大规模生产提供了参考依据。     

B型副鸡嗜血杆菌的分离鉴定

从辽宁某公司鸡场疑似鸡传染性鼻炎的病鸡眶下窦分离到一株副鸡嗜血杆菌，用Page程序和Kume程序对其进行血清型鉴定，确认为B型副鸡嗜血杆菌，这是首次在我国分离到B型副鸡嗜血杆菌。     

二株副鸡嗜血杆菌分离株的生物学特性鉴定

本试验对从广西分离的４株疑似副鸡嗜血杆菌（Ｈ．ｐｇ）（ＧＸ－９５,ＧＸ－９７,ＧＸ－９８－１,ＧＸ－９８－２）进行生物学特性研究。根据生物学特性,ＧＸ－９７和ＧＸ－９８－１被定为Ｈ．ｐｇ,ＧＸ－９５和ＧＸ－９８－２的生化反应特性有明显差异,用标准Ｈ．ｐｇ血清未能定型。交叉血凝抑制（ＨＩ）试验显示,各菌株之间的交叉ＨＩ效价达１６０,但各菌株与其本身的抗血清ＨＩ效价达１２８０,显示出很强的菌株特异性。抗菌素敏感试验也显示ＧＸ－９７、ＧＸ－９８－１和参考菌株的药敏谱更加相似。     

一株A型副鸡嗜血杆菌的分离鉴定

从山东省某蛋鸡场发病鸡群中分离到一株细菌,经培养特性观察、生化试验、V因子生长试验、致病性试验和PCR试验,证实分离菌为一株致病性副鸡嗜血杆菌,血清型鉴定该菌为A型。药物敏感性试验表明分离菌对头孢噻肟、头孢曲松、丁胺卡那霉素高度敏感,对硫酸新霉素、强力霉素中度敏感,对磺胺间甲氧嘧啶钠、环丙沙星、庆大霉素耐药。     

Dot—ELISA检测副鸡嗜血杆菌血清型特异性抗原的研究

本研究在副鸡嗜血杆菌型特异性单克隆抗体的基础上建立了检测该菌 Ａ、 Ｃ 型特异性抗原的 Ｄｏｔ Ｅ Ｌ Ｉ Ｓ Ａ 方法,结果表明本方法在检测副鸡嗜血杆菌型特异性抗原时未呈现与其它 ８ 种常见病原体的交叉反应,新鲜肉汤的最低检出量为 Ａ 型 １３×１０６ Ｃ Ｆ Ｕ／ｍ ｌ和 Ｃ 型 ８×１０６ Ｃ Ｆ Ｕ／ｍ ｌ,抗原的最低检出量均为 ２５μｇ／ｍ ｌ,对 ２０ 份抗原、肉汤和卵黄样品的检测结果与其已知结果相符。这就证明本方法具有较好的敏感性和特异性,是一种能直接检测分离株血清型的良好方法。     

副鸡嗜血杆菌分离株致病性和生长特性试验

为研究副鸡嗜血杆菌河北省分离株W菌株致病性及生长特性,以不同剂量对80日龄公鸡进行致病性试验.对W菌株16 h培养物进行100倍稀释,采用微量点板计数法在不同培养时间进行细菌计数以绘制生长曲线.结果表明,试验鸡接菌量在1.11×104cfu/只时发病率可以达到100%,由生长曲线计算W菌株的世代时间为25.33 min.W菌株可能成为研制优良鸡传染性鼻炎疫苗的候选菌株.     

副鸡嗜血杆菌在疫苗生产中生长特性的研究

通过测定培养期内副鸡嗜血杆菌C-Hpg-8的种子液活菌数和制苗菌液的活菌数及总菌数，分别绘制了种子液和制苗菌液的生长曲线，计算出C-Hpg-8种子液的世代时间为37.7min.在本试验条件下，C-Hpg-8种子液培养时间不应超过8h，制苗菌液的培养时间应控制在9-11h为宜。     

Unusual growth variants of Avibacterium paragallinarum

Two isolates of haemophilic bacteria originally isolated in the 1980s from chickens were re-examined. The addition of a 10% sterile filtrate from an overnight culture of Staphylococcus epidermidis allowed growth of both isolates in solid and liquid media that were otherwise not capable of supporting the growth of these isolates. Using the modified media, genotypic and serotypic studies were performed, which confirmed both isolates to be Avibacterium paragallinarum, with one isolate being serovar A and the other serovar C. The unusual growth requirements of these two isolates reinforces the need for careful interpretation by diagnostic laboratories examining chickens showing signs of upper respiratory tract disease.     

Characterisation of isolates of Haemophilus paragallinarum from Indonesia

OBJECTIVE: To characterise 18 isolates of Haemophilus paragallinarum isolated from chickens in Indonesia. PROCEDURE: The isolates were identified to species level by traditional phenotypic methods. Six of the isolates were also identified by a species-specific polymerase chain reaction. Fourteen of the isolates were examined for resistance to a panel of seven antimicrobial agents using a disc diffusion method. All 18 isolates were serotyped according to the Page scheme using reference antisera in a haemagglutination inhibition test. RESULTS: Four of the 18 isolates were obtained from indigenous (kampung) chickens, with the remainder being from typical intensive poultry production systems. The 18 isolates were obtained from 11 outbreaks that showed the typical clinical signs of infectious coryza and 11 of the isolates were obtained from chickens that had been vaccinated with infectious coryza vaccines. All 18 isolates were confirmed as H paragallinarum by biochemical testing and six isolates were also identified as H paragallinarum by the polymerase chain reaction test. Eleven isolates were resistant to erythromycin and streptomycin, 10 to neomycin, eight to oxytetracycline, five isolates to doxycycline, three to sulphamethoxazoltrimethoprim but only one to ampicillin. Seven isolates were Page serovar A, four were Page serovar B and seven were Page serovar C. CONCLUSION: The presence of all three Page serovars (A, B and C) has been confirmed for the first time in Indonesian chickens. As the majority of the infectious coryza vaccines in use in Indonesia contain only serovar A and C, the presence of serovar B in chickens indicates that the protection by these bivalent vaccines would be reduced. The use of trivalent infectious coryza vaccines that contain serovars A, B and C is recommended for use in Indonesia.     

副鸡嗜血杆菌的分离鉴定及我国鸡传染性鼻炎的流行状况分析

从不同地区免疫失败鸡场的鸡传染性鼻炎疑似鸡体内共分离到19株细菌，经回归试验、PCR等方法鉴定为副鸡嗜血杆菌。又将分离株用血清平板凝集试验、血凝抑制试验和型特异性单抗进行了血清型的鉴定，结果表明分离菌有15株为A型，4株为B型，说明我国鸡传染性鼻炎的流行已经出现了新的特点，在疾病预防和控制中应加以注意。另外大多数鸡场的免疫失败是由于免疫效果不良所致，但也有相当一部分鸡场的免疫失败是由于B血清型的出现引起的。