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1.
对湖北省某鸡场１１０只蛋进行了鸡毒支原体（ＭＧ）、滑液支原体（ＭＳ）血清平板凝集试验（ＳＰＡ）具有明显临床症状的鸡（眶下窦炎，呼吸困难，罗音等）均为ＭＧ－ＳＰＡ阳性（５４／５４）同舍６０只无症状鸡中有４６只为ＭＧ－ＳＰＡ阳性（７６．６％）对４只病鸡及４只ＭＧ－ＳＰＡ阴性健康鸡进行了支原体及细菌的分离鉴定。结果从３只病鸡中分离到鸡毒支原体，从２只病鸡分离到大肠杆菌Ｏ２血清型，证明为鸡毒支原体与大肠杆 相似文献
2.
将３０只２０周龄鸡毒霉形体（ＭＧ）阴性的蛋用种鸡分为４组，攻毒有Ⅰ组于颈部皮下接种２次油乳剂灭活苗；Ⅱ组免疫接种１次；Ⅲ组于攻毒后１周免疫接种１次，Ｃ组不接种疫苗，为对照线。４组鸡均在２９周龄是攻击ＭＣ致病株ＢＧ４４Ｔ。攻毒后通过７周观察，发现３个免疫组鸡的产蛋量下降率均明显低于对照组。攻毒后第７周剖杀Ⅰ组和对照组的全部鸡进行ＭＧ的分离培养，结果从对照组鸡的气管、肺和气囊中均分离到了ＭＧ，而Ⅰ组仅在气管和肺中分离到ＭＧ。２组鸡的输卵管中均未分离到ＭＧ。 相似文献
3.
淋巴细胞凋亡抑制与鸡马立克氏病的发生 总被引：3，自引：1，他引：2
本研究证明，外源性糖皮质激素（ＧＣ）可以诱导正常鸡和马立克氏病毒（ＭＤＶ）疫苗免疫鸡淋巴细胞ＤＮＡ出现１８０～９００ｂｐ的阶梯状小分子断片，即诱导淋巴细胞凋亡过程启动。尤其是疫苗免疫鸡淋巴细胞对体内生理浓度ＧＣ就有相当高的致ＤＮＡ阶梯状小分子断裂的敏感性。而这种诱导反应可以被ＲＵ４８６阻断，人工感染ＭＤＶ鸡同样有抑制该反应的作用，这暗示ＭＤＶ引起无免疫活性淋巴细胞在鸡体内堆集直到形成肿瘤，可能与ＭＤＶ抑制淋巴细胞凋亡，使自体生理性清除非功能性淋巴细胞的机制受阻有关。本研究还以ＲＵ４８６阻断鸡淋巴细胞糖皮质激素受体（ＧＲ）。结果使鸡对ＭＤＶ敏感性提高，ＭＤ病变形成提前。 相似文献
4.
研究证明，鸡感染马立克氏病毒（ＭＤＶ）后，外周血淋巴细胞（ＰＢＬ）糖皮质激素受体（ＧＲ）含量减少，其减少程度随病情的发展而加重，不因攻毒后时间的延伸而改变，提示鸡马立克氏病（ＭＤ）的发生与发展，与病毒所致ＰＢＬ的抗应激能力降低有关；ＭＤ肿瘤组织的ＧＲ含量较正常鸡ＰＢＬ的减少４０％；而含瘤病鸡的ＰＢＬ ＧＲ含量与之基本相同（Ｐ＞０．０５），说明发生肿瘤的ＭＤ鸡，其ＰＢＬ与瘤组织细胞的变化程度相似；Ｍ 相似文献
5.
鸡毒霉形体控制的新动向 总被引：3，自引：0，他引：3
美国对鸡毒霉形体（Ｍｙｃｏｐｌａｓｍａｇａｌｉｓｅｐｔｉｃｕｍ，ＭＧ）的控制开始于６０年代，主要是在美国农业部开始对家禽实行屠体检查后，因气囊炎导致胴体废弃率较高后进行的。此后，在火鸡和鸡育种群的ＭＧ控制方面取得了显著的进展。美国的志愿ＭＧ控制计划是... 相似文献
6.
毕丁仁 《中国预防兽医学报》1997,(4)
对湖北省某鸡场１１０只蛋进行了鸡毒支原体（ＭＧ）、滑液支原体（ＭＳ）血清平板凝集试验（ＳＰＡ）。具有明显临床症状的鸡（眶下窦炎、呼吸困难、口罗音等）均为ＭＧ－ＳＰＡ阳性（５４／５４），同舍６０只无症状鸡中有４６只为ＭＧ－ＳＰＡ阳性（７６．６％）。对４只病鸡及４只ＭＧ－ＳＰＡ阴性健康鸡进行了支原体及细菌的分离鉴定。结果从３只病鸡中分离到鸡毒支原体，从２只病鸡分离到大肠杆菌Ｏ２血清型，证明为鸡毒支原体与大肠杆菌的混合感染。在同等饲养条件下，对检测的病鸡、外表健康阳性鸡、健康阴性鸡分开饲养，并记录１８天的产蛋情况。结果，病鸡组产蛋率为１４．１１％，健康阳性鸡为５３．３５％，健康阴性鸡为７０．１７％，三组差异极显著。健康阴性鸡组产蛋率明显高于健康阳性鸡组和病鸡组。说明在隐性感染鸡群，即使未发病，也会给生产带来不可忽视的损失。 相似文献
7.
用种特异性ＤＮＡ探针对鸡败血霉形体病田间样本的检测Ｍ．Ｉ．ＫｈａｎＳ．Ｈ．Ｋｌｅｖｅｎ王贵平摘译用种特异性鸡败血霉形体（ＭＧ）ＤＮＡ探针对产蛋下降和ＭＧ可疑感染鸡群进行检测，并同常规血清学的病原分离作比较，ＭＧＤＮＡ探针可在２天内清楚地鉴定出直接来自... 相似文献
8.
洪秀聪 《中国预防兽医学报》1994,(1)
研制的鸡败血支原体（ＭＧ）油乳苗对雏鸡和成鸡均安全，免疫效果好．现地试用超过２０００万羽份表明，该苗能防制本病及减少诱发其它疫病，增加蛋鸡产蛋量，特别是种鸡经二次免疫能切断ＭＧ经卵传递．对培育无支原体的鸡群，效果明显． 相似文献
9.
本实验分别用马立克氏病（ＭＤ）三价苗和ＨＶＴ疫苗肌肉注射免疫１日龄雏鸡，在１０、２０、４０、６０和９０日龄以兔抗鸡ＩｇＧ、ＩｇＭ和ＩｇＡ重链抗血清为一抗，用彩色免疫金银染色法检测法氏囊、脾脏、盲肠扁桃体和哈德尔腺的ＩｇＧ、ＩｇＭ和ＩｇＡ抗体生成细胞的动态变化。结果发现：雏鸡ＭＤ疫苗免疫后，法氏囊和脾脏的ＩｇＧ、ＩｇＭ和ＩｇＡ抗体生成细胞较对照鸡显著增多，盲肠扁桃体以ＩｇＡ抗体生成细胞为主、哈德尔腺以ＩｇＧ抗体生成细胞居多的三种抗体生成细胞数量均明显升高；三价苗免疫鸡的抗体生成细胞显著多于ＨＶＴ疫苗免疫鸡。说明ＭＤ疫苗免疫鸡全身免疫器官、呼吸道和消化道相关局部免疫组织的体液免疫反应显著增强，三价苗免疫鸡的体液免疫应答水平明显高于ＨＶＴ疫苗免疫鸡。 相似文献
10.
鸡败血支原体油乳苗的研究 总被引：2，自引：1，他引：1
研制的鸡败血支原体（ＭＧ）油乳苗对雏鸡和成鸡均安全，免疫效果好。现地试用超过２０００万羽份表明，该苗能防制本病及减少诱发其它疫病，增加蛋鸡蛋量，特别是种鸡经二次免疫能切断ＭＧ经卵传递，对培育无支原体的鸡群，效果明显。 相似文献
11.
烯醇化酶参与支原体糖酵解、细胞黏附及免疫调节等多种生命活动,对其开展功能研究有助于了解鸡毒支原体黏附及感染机制。本研究通过重叠PCR克隆获得鸡毒支原体烯醇化酶,经原核表达获得可溶性融合蛋白rMGEno,将纯化产物免疫BALB/c小鼠后制备获得特异性多抗。通过Western blot和ELISA检测发现,烯醇化酶在鸡毒支原体不同强弱毒株中高度保守,表达产量高,在鸡毒支原体参试各毒株的细胞膜中均有分布。这一表达产物的成功制备为深入研究鸡毒支原体烯醇化酶的生物学功能奠定了基础。 相似文献
12.
氧氟沙星对霉形体与大肠杆菌合并感染鸡的药效学研究 总被引：6，自引：0，他引：6
以试管两倍稀释法测得氧氟沙星及其对照药物恩诺沙星、洛美沙星和强力霉素对鸡败血霉形体的最小抑菌浓度分别为０．００６２５、０．０２５、０．４和０．４ｍｇ／Ｌ。５０、１００、２００ｍｇ／Ｌ氧氟沙星、５０ｍｇ／Ｌ恩诺沙星、５０ｍｇ／Ｌ洛美沙星和１００ｍｇ／Ｌ强力霉素连续５ｄ饮水给药,对人工合并感染败血霉形体和大肠杆菌病鸡的治愈率分别是９３．３％、９６．７％、９６．７％、１００％、９６．７％和８３．３％,感 相似文献
13.
Roxanna Khorzad DVM Megan Whelan DVM DACVECC Allen Sisson DVM MS DACVIM G. D. Shelton DVM PhD DACVIM 《Journal of Veterinary Emergency and Critical Care》2011,21(3):193-208
Objective – To review the human and veterinary literature on the pathophysiology of myasthenia gravis (MG) and describe treatment options for clinical use in people and animals. Data Sources – Human and veterinary clinical reports, studies and reviews, textbooks, and recent research findings in MG from 1996 present, with a focus on treatment and patient management. Human Data Synthesis – MG is a well‐described condition in people with new research and treatment options available. Many of the newest therapeutic options available in veterinary medicine for MG are based on current strategies used in people with this condition. Seronegative MG is well described in people and provides insight to clinical cases encountered in veterinary medicine when the index of suspicion is high though serologic tests are negative. Veterinary Data Synthesis – Previous studies in veterinary medicine focused on the use of acetylcholinesterase inhibitors as the main form of treatment in canine MG. Recent studies, mainly case series and case reports, emphasize the use of immunomodulatory treatments as an alternative for long‐term treatment. However, there are no randomized, controlled studies on treatment with immunomodulatory therapy for MG in dogs available to assess the efficacy of this treatment strategy. Conclusions – Although early recognition of clinical signs is most important in the outcome of patients with MG, further understanding the pathophysiology of MG may lead to earlier diagnosis and novel treatment strategies. The discovery of additional autoantibodies against striated muscle proteins in dogs, should enhance our understanding of diseases affecting the neuromuscular junction. In addition, clinical data for canine MG could be applied to other autoimmune disorders. 相似文献
14.
Antognoni M. T. Birettoni F. Miglio A. Lalli P. Porciello F. Mangili Pecci V. 《Veterinary research communications》2010,34(1):97-101
The term monoclonal gammopathy (MG) suggests the presence of clonal immunoglobulins in blood serum that are recognized as narrow spikes in the β and/or γ region of the electrophoretic pattern of serum. In the dog, MG is rare and is associated with a heterogeneous group of diseases that include multiple myeloma (the most common source of MG) as well as infectious and chronic inflammatory diseases such as Leishmaniasis. In this paper, two cases of MG are described: the first case is associated with multiple myeloma of monoclonal component type IgA/λ, with the latter rare in dogs, and the second case involves MG that developed 3 years after an initial diagnosis of Leishmaniasis.
相似文献15.
Mycoplasma gallisepticum (MG) is an important avian pathogen causing significant economic losses within the poultry industry. In an effort to develop tools to aid in MG research and diagnostics, we have compared sequences of the attenuated MG vaccine strain ts-11 to those of commonly used pathogenic challenge strains in search of a simple means of differentiation. Via gapA sequence alignments and comparisons, we have identified and designed primers facilitating strain differentiation. When applied to conventional polymerase chain reaction (PCR) assay at low annealing temperature, the primer sets allow for the differentiation of MG attenuated vaccine strains ts-11 as well as the attenuated MG vaccine strain 6/85 from the commonly utilized MG challenge strains R(low), R, and S6. Conventional PCR differentiation is based on the visualization of sole products with the attenuated MG strains ts-11 and 6/85 and the lack of the corresponding products from MG strains R(low), R, and S6. When applied to MG strain F, product visualization varies with the applied primer set. The differentiation of MG strains ts-11 and 6/85 from the pathogenic challenge strains was also accomplished via real-time analyses, however, the primer sets were not able to differentiate MG strains ts-11 and 6/85 from selected MG field isolates. 相似文献
16.
为建立能同时检测鸡毒支原体(Mycoplasma gallisepticum, MG)和鸡滑液囊支原体(Mycoplasma synoviae,MS)的双重PCR诊断方法,该研究根据GenBank中登录的MG gapA基因序列和MS heat shock ATP-dependent protease基因序列,设计2对特异性引物,通过对PCR扩增条件的优化,建立了能够同时检测MG和MS的双重PCR诊断方法。特异性检测结果显示,该方法能够扩增出729 bp的MG和309 bp的MS特异性片段,对禽巴氏杆菌、大肠杆菌、鸡白痢沙门菌、副鸡禽杆菌核酸扩增均为阴性;敏感性检测结果显示,对MG和MS DNA的最低检出量均为5×10-2 ng/μL;临床样品的检测结果显示,所建立的双重PCR方法可同时有效地检测出MG、MS混合感染和单独感染。该研究建立的鸡毒支原体与鸡滑液囊支原体双重PCR方法具有良好的特异性、敏感性、重复性,为快速、高效检测MG和MS提供了技术支持。 相似文献
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18.
Selected immunogenic proteins of Mycoplasma gallisepticum (MG) strain R and M. synoviae (MS) isolate F10-2AS were purified from sodium dodecyl sulfate-polyacrylamide gels. Purified MG proteins of 65 to 63 (p64) kilodaltons (kDa), and 26 and 24 (p26/24) kDa, and purified MS proteins of 53 (p53) kDa, 41 (p41) kDa, and 22 (p22) kDa were evaluated as potential antigens for an enzyme-linked immunosorbent assay (ELISA). Chicken antisera to MG, MS, or oil-emulsion vaccines were used to evaluate these purified proteins as antigens in a dot-ELISA. MG antigen p64 detected antibodies 3 days after the serum plate agglutination (SPA) test and 7 days before the hemagglutination-inhibition (HI) test. Antigen p64 detected antibodies to 12 MG isolates, and in sera from field outbreaks of MG. No cross-reactions with MS-positive antisera were seen with antigen p64. MG antigen p26/24 did not perform as well as p64. MS antigen p41 detected antibodies 5 days after the SPA test and at least 11 days before the HI test, and in sera from field outbreaks of MS. However, some MG-positive antisera reacted with p41. MS antigens p53 and p22 did not perform well. 相似文献
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A Mycoplasma gallisepticum (MG) isolate from an atypically mild outbreak in turkey breeders was found to be similar to house finch isolates by DNA analyses. A preliminary study in turkeys showed that this isolate (K5054) caused very mild lesions and protected turkeys against subsequent challenge with a virulent MG strain. In this study, K5054 was further evaluated as a potential vaccine strain in commercial layer-type chickens and turkeys. The safety of K5054 was evaluated by aerosol challenge followed by evaluation of gross and histopathologic lesions as well as serologic reactions and isolation of MG from the trachea and air sacs. Infection of chickens (trial 1) and turkeys (trial 2) with K5054 resulted in little evidence of MG lesions. There was weak seroconversion, and K5054 was consistently reisolated from the tracheas of chickens and turkeys. The efficacy of K5054 as a vaccine was evaluated by aerosol challenge of vaccinated chickens (trial 3) and turkeys (trial 4) with virulent R strain. There was evidence of protection from lesions associated with MG. 相似文献