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流产衣原体(Chlamydia abortus)属于衣原体科(Chlamydiaceae)、衣原体属(Chlamydia),系一类细胞内寄生的革兰阴性原核型微生物。流产衣原体导致羊的流产、死胎,严重威胁养羊业。流产衣原体不仅可以感染羊,还可以感染怀孕妇女。在病原的诊断方面,分子生物学技术因其快速与相对灵敏性的优点得到快速发展,然而细胞分离培养仍然是鉴定流产衣原体的"金标准"。在防治方面,疫苗免疫是预防流产衣原体的理想措施,在我国流产衣原体灭活疫苗已获得国家一类新兽药证书并可以为羊提供有效地免疫保护。疫苗与抗菌药物的合理使用可以为羊群提供很好的保护。 相似文献
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<正>羊衣原体病是由鹦鹉热衣原体(C.psittaci)和反刍动物衣原体(C.p ecorum)引起的一种传染病。鹦鹉热衣原体临床上以发热、流产和产弱羔为特征,而反刍动物衣原体常引起羊多发性关节炎、结膜炎和肠炎,是危害羊的主要疾病。临床上该菌分离培养较困难,为了解衣原体对羊感染和危害情况,收集当地羊场羊群517份羊血液样品,姬姆萨氏 相似文献
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为了解贵州省山羊流产与山羊痘的相关性,采用琼脂扩散试验和PCR法对本省10个市(县)流产羊群的血清和病料样本进行山羊痘抗原抗体及病原核酸检测,同时血清进行布氏杆菌抗体检测,流产胎儿病料进行羊流产亲衣原体病原核酸检测。结果发现山羊痘羊群流产率达37.1%(4329/11660),山羊痘血清抗体阳性率为38.2%(34/89),抗原阳性率为72.7%(32/44),流产胎儿山羊痘病毒核酸检出率为83.3%(10/12),发病羊群未检出布氏杆菌和羊流产亲衣原体感染。结果表明,山羊流产与山羊痘感染有一定关系,提示在山羊养殖中应加强饲养管理,防止山羊痘感染引起孕羊流产。 相似文献
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流产衣原体是导致绵羊地方性流产的主要病原体，给全球畜牧业经济发展构成了巨大威胁。为建立一种灵敏、特异且快速的检测流产衣原体的实时荧光定量PCR方法，依据衣原体蛋白酶样活性因子的基因组序列设计了针对检测流产衣原体的引物和TaqMan探针，对反应体系和反应条件进行了优化，对方法的灵敏度、特异性及重复性进行了评价，并初步应用于临床样本检测。结果显示，该方法的最低检测限为26 copies/μL，灵敏度是普通PCR的10倍；与其他可以引起类似症状的病原体无交叉反应；组内和组间变异系数均小于3%；对156份流产羊拭子的基因组进行检测，检出率为78.21%。研究表明，该方法可以很好的应用于流产衣原体的大规模临床样本检测，为流产衣原体病的高通量检测和流行病学调查提供技术手段。 相似文献
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以不育和流产为主要临床特征的羊传染病主要有弯曲菌病和羊衣原体病弯曲菌病(旧名弧菌病)是由弯曲菌属中的胎儿弯曲菌引起牛、羊等动物的一种传染病。羊患本病时的特征是暂时性不育和流产。病羊衣原体病是由羊衣原体引起,幼羊多表现为多发性关节炎和滤泡性结膜炎,而妊娠母羊则发生流产、死产和产弱羔。 相似文献
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衣原体病是由鹦鹉热衣原体引起羊、牛等多种动物的传染病。临诊病理特征为流产、肺炎、肠炎、多发性关节炎和脑炎。衣原体为革兰氏阴性病原体，是专性细胞内寄生，能在鸡胚和易感的脊椎动物细胞内生长繁殖，在自然界中传播很广泛。主要通过性接触传播，牛羊衣原体性流产常呈地方性流行。 相似文献
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1 羊的地方性流产病(即羊流产衣原体病)衣原体病不论山羊、绵羊还是其他动物(包括人)均可感染,特别是绒山羊感染率最高.当怀孕的羊感染衣原体病后,衣原体在胎衣特别是绒毛叶生长繁殖,引起患部发炎,导致胎羔早期产出.种公羊感染后因精液带衣原体,借配种机会易传染给母羊.衣原体是介于病毒与细菌之间的一种微生物,其形状为球形. 相似文献
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Assuming a synergistic or additive effect of Chlamydiaceae in coexistence with other enteropathogenic agents, the viral/bacterial interaction between a cell culture adapted porcine epidemic diarrhea virus (ca-PEDV) and different Chlamydiaceae strains was studied in vitro. Vero cells were dually infected with ca-PEDV and one of the three chlamydial strains Chlamydia trachomatis S45, Chlamydophila abortus S26/3 or Chlamydophila pecorum 1710S. Three experimental protocols were designed varying the inoculation sequence. Cell layers were first inoculated with Chlamydiaceae and 20 h later with ca-PEDV in protocol one. In protocol two, both agents were administered concurrently, whereas in protocol three, ca-PEDV was applied 20 h in advance of the Chlamydiaceae. Immunofluorescence techniques, immunohistochemical (IH) staining and electron microscopy were subsequently employed to investigate the cell layers. Using indirect immunofluorescence (IF) labeling, all mixed infections revealed dually infected cells, however, only incidentally and in low numbers. Characteristically, ca-PEDV syncytia with one or more chlamydial inclusions were detected but dually infected single cells were absent. Some syncytial cells contained enlarged C. abortus or C. pecorum inclusions with abnormally large developmental forms. In comparison with simultaneously conducted monoinfections, larger chlamydial inclusions were observed in dually infected cell layers. Experiments with C. trachomatis showed significantly increased numbers of chlamydial inclusions in dually infected cell layers compared to monoinfected ones. These findings indicate an influence of ca-PEDV on the chlamydial developmental cycle and in the case of C. trachomatis, a positive effect on chlamydial colonization in mixed infections. 相似文献
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[目的]为了明确宁夏固原地区肉用流产母牛4种流产相关病原的流行情况。[方法]试验选择宁夏固原市5个地区不同规模化肉牛养殖场,采集131份有流产史的母牛血清样品,采用酶联免疫吸附试验（ELISA）分别对流产相关病原抗体/抗原进行检测和分析。[结果]采集的131份血清样品中共检出109份阳性血清,阳性率为83.2%。其中BVDV抗体阳性率为62.6%（82/131）、流产衣原体抗体阳性率为59.5%（78/131）、IBRV抗体阳性率为13.7%（18/131）,布鲁氏菌抗体阳性率为0%（0/131）。结果表明,采集的131份血清样品中共检出109份阳性血清,阳性率为83.2%。其中BVDV抗体阳性率为62.6%（82/131）、流产衣原体抗体阳性率为59.5%（78/131）、IBRV抗体阳性率为13.7%（18/131）,布鲁氏菌抗体阳性率为0%（0/131）。109份阳性样品中,最多出现3种病原混合感染。其中单一病原感染阳性样品占42.2%（46/109）,以BVDV感染比例最大,与流产衣原体阳性率相比差异显著（P＜0.05）;2种病原混合感染样品占56.9%（62/109）,以BVDV和流产衣原体混合感染比例最大,与流产衣原体和IBRV混合感染阳性率、BVDV和IBRV混合感染阳性率差异极显著（P＜0.01）;3种病原混合感染样本占4.6％（4/109）,主要以BVDV、流产衣原体和IBRV混合感染为主。[结论]宁夏固原地区流产母牛均存在以上3种疫病感染,其中主要以BVDV和流产衣原体单独或混合感染为主。 相似文献
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Calves inoculated with Brucella abortus S45/20 produced, against surface antigens, non-agglutinating antibodies (NAAb) which were isolated and purified. A kinetic analysis was carried out of NAAb in antibody-dependent cell-mediated cytotoxicity (ADCC) using sheep red blood cells labelled with surface antigen from B. abortus S45/20 as target cells. Three parameters were examined: time of incubation, effector cell:target cell (E:T) ratio and NAAb dose. It was found that the NAAb were not able to mediate ADCC with bovine spleen cells. 相似文献
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抗奶牛衣原体单克隆抗体杂交瘤细胞株的建立 总被引：3，自引：1，他引：2
将奶牛衣原体抗原免疫的 Ｂ Ａ Ｌ Ｂ／ｃ 小鼠脾细胞与 Ｓ Ｐ２／ Ｏ 细胞在聚乙二醇作用下融合, 用间接 Ｅ Ｌ Ｉ Ｓ Ａ 试验筛选, 以有限稀释法克隆３ 次, 得到６ 株分泌抗奶牛衣原体单克隆抗体（ Ｍｃ Ａｂ） , 选择抗体分泌较高的 Ｇ２ 、 Ｆ２３ 、 Ａ 株进行详细的研究, 结果表明, 其核内染色体数为９０３５ 、９２１４ 、９４４２ ; 抗体属性为 Ｉｇ Ｇ２ａ 、 Ｉｇ Ｇ１ 、 Ｉｇ Ｍ, 用交叉 Ｅ Ｌ Ｉ Ｓ Ａ 法对３ 株 Ｍｃ Ａｂ 作特异性分析, 该 Ｍｃ Ａｂ 只与奶牛衣原体抗原, 猪衣原体抗原、羊衣原体抗原发生反应,而不与沙眼衣原体抗原、伪狂犬病抗原、布鲁氏杆菌抗原发生反应。 相似文献
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流产衣原体(Chlamydia abortus)广泛分布于世界各地,能感染猪、牛、羊等多种家畜,引起孕畜流产,是危害畜牧业最严重的衣原体病原。针对流产衣原体抗体检测的血清学方法如间接血凝试验(IHA)、酶联免疫吸附试验(ELISA)等在兽医临床检测中广泛使用。以聚合酶链反应(PCR)为代表的病原分子生物学检测技术敏感性和特异性高,有效地弥补了血清学方法的不足。在流行病学研究中,进一步对流行菌株的分型分析在阐释流产衣原体遗传进化、毒力演变和跨物种传播以及疫情预警和疫苗研制等方面具有重要意义。论文就当前国内外广泛应用的流产衣原体检测技术和分型方法进行综述,可为我国动物衣原体病的诊断和防控提供参考。 相似文献
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Bovine ileal dome lymphoepithelial cells: endocytosis and transport of Brucella abortus strain 19 总被引：1，自引：0，他引：1
Ligated ileal loops of calves were inoculated with Brucella abortus and examined at 2, 4, 6, 10, and 24 hours post-inoculation. B. abortus was identified by light and electron microscopy using immunoperoxidase and antibody-coated colloidal gold techniques. B. abortus was detected in vesicles, phagolysosomes, and large vacuoles of lymphoepithelial cells. Numbers of intracellular bacteria decreased with time after inoculation. B. abortus was also seen between and below lymphoepithelial cells and free in the dome interstitium and intestinal lymph vessels. Neutrophils and macrophages in both epithelium and lamina propria contained intact or degraded bacteria within phagosomes, phagolysosomes, and multivesicular bodies. These studies showed that (1) transepithelial migration of B. abortus occurred principally by dome lymphoepithelial cell endocytosis and transport, and (2) B. abortus was degraded by macrophages and neutrophils of the gut-associated lymphoid tissue. 相似文献
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Detection of Brucella abortus in mammalian tissue, using biotinylated, whole genomic DNA as a molecular probe 总被引：1，自引：0，他引：1
A method has been developed for the detection of Brucella abortus in complex tissue homogenates. The technique uses tissue homogenization in the presence of sucrose and Triton X-100 and subsequent filtration through a 5-microns pore size filter to remove mammalian nuclei and cellular debris. The DNA from the bacteria is then extracted, dot blotted onto nitrocellulose, and hybridized with a biotinylated probe of B abortus strain 19 DNA. In the present study, BALB/C mice were inoculated intraperitoneally with either 10(9) or 10(11) B abortus strain 2308S organisms. After 6 days, the mice were euthanatized by cervical dislocation and the livers were removed, weighed, and the appearance of each was noted. The tissues were homogenized, and a viable cell count was performed to determine the number of bacteria in each organ. The DNA was extracted, blotted onto nitrocellulose, and hybridized with the Brucella probe. The biotin label was detected by use of a commercially available streptavidin/alkaline phosphatase system. In control experiments, the technique detected 10(5) organisms in a mixture of bacteria and 1 g of rat liver. The technique also detected 10(7) B abortus organisms/g of tissue from experimentally inoculated mice. The probe was specific for Brucella and had no affinity for contaminating bovine or bacterial DNA. 相似文献
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Runge M Binder A Schotte U Ganter M 《Berliner und Münchener tier?rztliche Wochenschrift》2012,125(3-4):138-143
The intracellular bacteria Coxiella (C) burnetii and Chlamydia (Chl) abortus induce abortion in sheep and also affect humans. While Chl. abortus only infrequently infects humans, C burnetii is the aetiological agent of numerous Q fever outbreaks during the last decades. There is only limited knowledge about the prevalence of both pathogens in sheep, although sheep are involved in almost all Q fever outbreaks in Germany. The aim of our study was to investigate the prevalence of both pathogens in flocks located in Lower Saxony, Germany, in correlation to the management form and abortion rate. Serum samples of 1714 sheep from 95 flocks located in Lower Saxony were investigated by ELISA. 2.7% of these samples were positive, 1.3% showed inconclusive results in the C. burnetii-ELISA. Elevated intra-flock seroprevalences were only detected in three migrating flocks. Chlamydia-specific antibodies could be detected in 15.1% serum samples of mainly shepherded and migrating flocks. In one of these flocks with a high intra-flock seroprevalence for C burnetii (27%) and Chlamydia (44.9%), C burnetii was detected in 21.6% of the placenta samples of normal births and in 12.5% of the colostrum samples by PCR. Aborted fetuses and the corresponding placentas were negative in C burnetii-PCR, but in most of them and also in many other placenta samples Chl. abortus could be detected by PCR and DNA microarray. This survey shows a low overall prevalence of C. burnetii in sheep in Lower Saxony in the year 2004. However, three migrating flocks with a high intra-flock prevalence are localized in the southern parts of Lower Saxony. Spreading of C burnetii could occur, because of the large radius of grazing of all three flocks. 相似文献
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Knitz JC Hoelzle LE Affolter P Hamburger A Zimmermann K Heinritzi K Wittenbrink MM 《DTW. Deutsche tier?rztliche Wochenschrift》2003,110(9):369-374
A chlamydial vaccine efficacy trial with assessment of the clinical acceptability and serum antibody responses was performed in breeding sows. A BGM cell culture derived vaccine containing 10(8)/ml formalin-inactivated purified elementary bodies (Eb.) in sterile 0.15 M saline was prepared from Chlamydophila (Ch.) abortus strain OCHL03/99 which has been isolated in the herd from a sample of vaginal discharge. Vaccination was performed as a randomised trial with parallel treatment of a vaccinated group (25 sows) and non-vaccinated control group (20 sows). Sows received two 2.0-ml doses of vaccine intramuscularly at a three week interval. Control sows were dosed with sterile 0.15 M saline, accordingly. Serological response to vaccination was measured by ELISA with a total of 204 blood serum samples (114 from the vaccine group; 90 from the control group) using crude chlamydial LPS as the antigen. Compared to the control group, vaccinated sows showed a marked primary and secondary IgG serum antibody response following the two vaccinations. Antibody levels peaked between week 7 and 14 after priming vaccination, declined incrementally until week 27 but remained significantly higher than the corresponding sham-immune control levels and the prevaccination values of the vaccine group (p < 0.05). Western blot analysis of solubilized whole Eb. of Ch. abortus, Ch. pecorum, and Chlamydia (C.) suis with pre- and postvaccination sera confirmed that vaccination induced an antibody response preferentially against a range of 13 chlamydial antigens including the 40 kDa MOMP of Ch. abortus. Clinical side effects consisting of a transient mild local inflammatory reaction at the site of injection were observed in approx. 30% of vaccinated sows. These results provide the basis for further clinical evaluation of the Ch. abortus vaccine to protect sows from chlamydia-induced reproductive disorders. 相似文献