共查询到20条相似文献，搜索用时 250 毫秒
1.
为分离鉴定流产犬的致病病原及其生物学特性，本研究从重庆某宠物医院无菌采集流产犬全血2份，将其涂布于布鲁氏菌选择培养基，分别在不含CO2和含7.5%CO2条件下37℃培养72 h，观察菌落形态，并经结晶紫染色，观察细菌类型。按照国家标准鉴定分离菌的生化特性。细菌分离结果显示，在不含CO2和含7.5%CO2的培养箱中2份流产犬全血样品在布鲁氏菌选择培养基上均长出边缘整齐、光滑的圆形菌落，透射光下，菌落呈浅黄色且有光泽；结晶紫染色结果显示分离菌为典型的粗糙型细菌；生化鉴定结果显示，分离株在TSA中的生长不依赖于CO2，且不产生H2S，氧化酶和脲酶试验均为强阳性。上述结果表明分离到一株犬种布鲁氏菌，命名为B. canis CQ3。对分离菌进行全基因组测序，利用MAUVE对分离株与GenBank中38株不同种的布鲁氏菌基因组进行比对，并构建分离菌全基因组的进化树。将不同种布鲁氏菌及分离株分别接种于TSB培养基中，通过测定不同时间的OD450nm值绘制各菌株的生长曲线。将各菌株及B. canis CQ3株分别以MOI 100感染小鼠腹腔巨噬细胞RAW264.7，在感染后的不同时间(1 h、24 h... 相似文献
2.
为了解甘肃省兰州市城关区犬布鲁氏菌病的流行情况，从兰州市城关区动物医疗机构和兰州市流浪动物救助站共采集犬血清343份，采用光滑型虎红平板凝集试验、粗糙型虎红平板凝集试验、通用型胶体金检测法和光滑型胶体金检测法进行检测，对4种方法检测出的阳性血清进行通用型快速PCR复检；对光滑型虎红平板和粗糙型虎红平板凝集试验检测出的阳性血清再分别进行光滑型试管凝集试验和粗糙型试管凝集试验复检。结果表明，4种方法共检出34份阳性血清，其中抗体检测法虎红平板凝集试验、试管凝集试验及布鲁氏菌通用型抗体检测试纸条分别检测出阳性血清22份、18份和12份，抗体阳性率分别为6.4%、5.2%和3.5%;抗原检测法通用型快速PCR检出阳性血清25份，抗原阳性率为7.2%。22份虎红平板凝集阳性样本经光滑型试管凝集试验和粗糙型试管凝集试验复检，共检出阳性血清18份，且均为粗糙型；布鲁氏菌光滑性抗体金标快速检测卡检测均为阴性。说明兰州市城关区犬感染的主要是粗糙型布鲁氏菌，快速通用型荧光PCR的阳性检出率最高。 相似文献
3.
作者用Corbel等介绍的犬种布鲁氏菌(B.Canis)试管凝集和虎红平板凝集试验方法,在甲市和乙县对303只家犬进行检测,试剂由中国预防医学科学院流行病学微生物学研究所提供。发现血清阳性犬随即剖杀,取脏器标本接种于布氏琼脂培养基(美国产)检菌。少数阳性犬的脏器标本接种于豚鼠,30天后剖杀作病菌分离培养。结果发现血清阳性犬18只,阳性率为5.90%。甲市乙县,犬的性别之间的阳性率,均无统计学差异。在检菌中分离到B.Canis菌7株,各种标本的分离率由高至低依次为:脾(6/7)、肝(5/7)、骨髓(5/7)、鼠蹊部和肠系膜淋巴结(3/6)、后腹壁淋巴结(3/6)、子宫和腹水(1/3)。凡血清凝集反应滴度≥1:160的犬,均分离到病原菌。对7株B.Canis菌鉴定表明:该菌对硫堇和复红的敏感性有较大差别。本文首次在××省分离到B.Canis菌,证实在本省存在该菌疫源地。 相似文献
4.
为查明甘肃省永靖县奶牛布鲁氏菌病流行情况、感染菌种和类型,2013—2017年对永靖县8月龄以上奶牛进行了布鲁氏菌病监测,对2016年检出的3份疑似感染布鲁氏菌奶牛的脾脏进行了病原分离与鉴定。结果显示:2013—2014年检测奶牛444头,未检出阳性;2015—2016年检测奶牛706头,检出阳性63头,个体阳性率为8.92%;3份脾脏样本均为布鲁氏菌PCR检测阳性,细菌分离培养15 d,只有1份生长菌落;将分离菌株用AMOS-PCR进行检测,获得流产布鲁氏菌特征的扩增条带,且分离菌株的omp25基因测序结果与流产布鲁氏菌高度吻合。本监测和细菌分离鉴定结果为该地布鲁氏菌病防控提供了技术支撑。 相似文献
5.
为查明甘肃省永靖县奶牛感染布鲁氏菌病的菌种和类型,为该地区布病科学防控提供技术支撑,2016年9月,对永靖县3份疑似感染布鲁氏菌病奶牛脾脏进行了病原的分离与鉴定。结果表明:PCR从3份样本均检测出布鲁氏菌;细菌分离培养,15 d内,3份样本中只有1份样本生长菌落,其余2份样本培养无细菌菌落出现;分离的1份菌株用AMOS-PCR获得流产布鲁氏菌特征的扩增条带;分离菌株的opm25基因测序结果与流产布鲁氏菌高度吻合。 相似文献
6.
为了了解我国部分省市犬感染布氏杆菌的情况。用血清样品用虎红平板凝集试验(RBT)和OIE标准间接酶标试验(i-ELISA)初筛,初筛阳性样品用试管凝集试验(SAT)复核,对SAT判定为阳性血清所对应的脾脏或新鲜全血进行布氏杆菌分离与培养。结果显示,4 750份犬血清中60份为阳性(29份检测到粗糙型布氏杆菌抗体:牧区2份、农区4份、城区23份;31份检测到光滑型布氏杆菌抗体:牧区19份、农区2份、城区10份),个体阳性率为1.26%(牧区6.69%,农区1.53%,城区0.84%);3份脾脏和1份新鲜全血经接种培养后,从1份全血中分离到1株菌,经AMOS-PCR方法鉴定为犬布氏杆菌。试验结果表明,调查的部分省市均有犬感染布氏杆菌,牧区个体阳性率最高、农区居中、城区最低,且存在粗糙型和光滑型布氏杆菌混合感染的现象。 相似文献
7.
8.
流产布鲁氏菌疫苗候选株RB6生物学特性研究 总被引：1，自引：0，他引：1
为了开发布鲁氏菌病新型标记疫苗,本研究对流产布鲁氏菌基因缺失株RB6的培养特性、染色特性、凝集特性、稳定性及小鼠体内毒力和免疫保护力进行了系统鉴定,旨在阐明该菌株具备的生物学特性。通过对亲本菌株和RB6的比较,发现固体培养基上RB6菌株单菌落可被结晶紫染成紫色,RB6菌株液体培养物可与0.1%吖啶黄染料以及抗布鲁氏菌粗糙型抗体发生凝集反应,证明该菌株为粗糙型。将RB6菌株在体外连续传代培养20次和牛体内连续5次继代,检测结果证明其表型未发生变化,说明该菌株遗传稳定性良好。通过小鼠体内试验发现该菌株毒力显著降低,并对流产布鲁氏菌强毒菌株2308攻毒的免疫保护力与现有疫苗A19接近。本研究结果表明,流产布鲁氏菌基因缺失株RB6为粗糙型菌株,毒力较低、安全性高、遗传性状稳定,并具有良好的免疫保护效力,有望开发成为动物布鲁氏菌病粗糙型标记疫苗。 相似文献
9.
10.
采集疑似布鲁氏菌病感染的牛奶和血清各82份,应用哈萨克斯坦共和国的布鲁氏菌病诊断复合抗原和国产抗原,分别对血清和奶样进行虎红平板凝集试验(RBT)、试管凝集试验(SAT)和乳环凝集试验(MRT),用西班牙IELISA奶样检测试剂盒对奶样进行检测,并对所有阳性奶样进行细菌分离与PCR鉴定。结果显示,国产抗原和复合抗原的RBT结果与奶样IELISA总体符合率分别为65.85%和92.68%,SAT结果与奶样IELISA总体符合率分别为79.52%和90.24%,MRT结果与奶样IELISA总体符合率分别为79.27%和80.49%。PCR和AMOS-PCR检测结果显示分离菌株为羊种布鲁氏菌。结果表明,两种MRT抗原在血清和奶样检测中都存在漏检现象;从牛乳中分离到布鲁氏菌羊种3型,说明出现了跨种传播,应引起重视。 相似文献
11.
12.
Schetters TP Kleuskens JA Scholtes NC Gorenflot A Moubri K Vermeulen AN 《Veterinary parasitology》2001,100(1-2):75-86
Soluble parasite antigens (SPA) from European Babesia canis can be used to protect dogs against a homologous but not heterologous challenge infection. In this study it is shown that when dogs are vaccinated with a mixture of SPA from both, a European B. canis isolate and a South African Babesia rossi isolate, protective immunity against heterologous B. canis infection is induced. Three groups of five beagle dogs each were vaccinated twice with graded doses of SPA derived from in vitro cultures of B. canis and B. rossi, with a 3-week interval. Saponin was used as adjuvant. Three weeks after booster vaccination immunological responsiveness against heterologous B. canis antigen was measured by seroconversion against infected erythrocytes and lymphocyte transformation using SPA. Upon vaccination dogs produced antibodies against infected erythrocytes and lymphoblastogenic responses against SPA in a dose-dependent manner. Dogs were then challenged with heterologous B. canis parasites. Dogs appeared to be protected against challenge infection, which was reflected in less severe decrease of packed cell volume (PCV) and reduced clinical signs. The level of protection to clinical signs (but not excessive PCV drop) was related to the level of SPA in plasma and spleen size, and not related to peripheral parasitaemia. The results suggest that vaccination with this bivalent vaccine primes T-helper cells that recognise common epitopes on SPA from an antigenically distinct B. canis isolate. These cells provide the essential Th signal to mount an effective and timely antibody response against SPA and parasites or parasitised erythrocytes, which prevents the further development of clinical babesiosis. 相似文献
13.
Nöckler K Kutzer P Reif S Rosenberger N Draeger A Bahn P Göllner C Erlbeck C 《Berliner und Münchener tier?rztliche Wochenschrift》2003,116(9-10):368-372
Brucella (B.) canis was isolated from ejaculate of a 4-year old Korthals-Griffon male dog after occurrence of epididymitis and orchitis. Despite several trials of therapy with different antibiotics relapes occurred, with B. canis being isolated from ejaculate, blood and urine samples, respectively. Bacteriological examinations were added by serological testing over a period of about 1.5 years. During the study SAT serum titre steadily dropped from 1:200 to 1:50. By CFT, B. canis antibodies were detectable at the beginning with a titre of 1:320 and to the end of the study with titres between 1:80 and 1:160. 相似文献
14.
S C Barr B E Eilts A F Roy R Miller 《Journal of the American Veterinary Medical Association》1986,189(6):686-687
Brucella suis biotype 1 was isolated from the semen of a dog with hindlimb weakness and a large, firm, left epididymis. A semen sample was oligospermic, with many neutrophils, the numbers of which decreased in serial sampling. A card agglutination test for B abortus and a rapid slide agglutination test for B canis were positive. The modified 2-mercaptoethanol slide agglutination test for B canis and the agar gel immunodiffusion test, using B canis cell wall antigen, were negative. At necropsy, chronic granulomatous inflammation was found in, and B suis biotype 1 was isolated from, the left epididymis and prostate gland. 相似文献
15.
The purpose in this study was to examine the immunogenic properties of various preparations of aqueous ether extracts of Brucella suis and Brucella canis. The B suis strain 3b and B canis strain RM-6-66 were grown on tryptose agar, and aqueous ether extracts were prepared from the cells. The ether was removed, and the extracts were clarified by centrifugation for 10 hours at 144,000 X g and fractionated by gel chromatography. The B suis endotoxin-containing precipitate, obtained from aqueous ether extracted material by ethanol precipitation, and fraction 1, prepared from ultracentrifugal supernate by column chromatography, protected mice against homologous infection. The B canis aqueous ether-extracted material also protected mice against B suis infections. 相似文献
16.
菌壳技术是一种新型的灭活疫苗制备方法,通过非变性的灭活方式保存细菌表面多个抗原表位,所制备的菌壳可作为预防细菌病的理想疫苗。本试验从噬菌体PhiX174 DNA钓取裂解E基因,连接至温控原核表达载体pBV220,通过PCR在所构建的pBV220+E上扩增出蛋白裂解部件（protein lysis component,PLC）,该部件包含阻遏蛋白cI857、溶菌E基因及终止序列rrnbT1T2,然后将其克隆至广宿主表达载体pBBR1MCS-2中,最终将构建的广宿主裂解质粒pBBR+PLC电转入犬布鲁氏菌RM6/66中。试验结果表明,经42 ℃诱导后,广宿主裂解质粒对犬布鲁氏菌RM6/66的裂解率达100%,成功制备了犬布鲁氏菌RM6/66菌壳疫苗。本试验通过菌壳技术制备的犬布鲁氏菌疫苗对预防宠物犬布鲁氏菌病起到重要作用,同时也对人兽布鲁氏菌疫苗的研制提供新策略。 相似文献
17.
Twenty mammary lymph node samples were collected from cattle on a farm in the Republic of Korea. These cattle were serologically negative for Brucella by tube agglutination test (≤ 1:50) and serum agglutination test (≤ 1:50). Out of 20 lymph node samples, two samples were positive for Brucella growth on Brucella agar as well as blood agar. Tests for urease, hydrogen sulphide and reactions against monospecific sera A and M indicated that these two isolates (No. 15 and 16) belong to the genus Brucella. Genus specific, AMOS (abortus, melitensis, ovis, suis) and Bruce-ladder multiplex polymerase chain reaction (PCR) assays confirmed the Brucella isolates as either a B. abortus or a B. canis strain. This is the first report of the occurrence of a B. canis infection in cattle in Korea. More survey data are needed to determine whether B. canis is a significant aetiology in the cases of cattle brucellosis in Korea. 相似文献
18.
Watarai M Kim S Yamamoto J Miyahara K Kazama M Matsuoka S Chimura S Suzuki H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(5):477-480
Brucella canis is the causative agent of canine brucellosis and facultative intracellular pathogen. The diagnosis of canine brucellosis is based on bacteriological examination and serological methods including agglutination and gel diffusion tests. In this study, crude antigens were extracted from B. canis using hot saline, coated on to latex beads and their usefulness in the serological diagnosis of canine brucellosis was examined. Mixing the antigen coated latex beads with the sera of dogs infected with B. canis produced clear agglutination, but this was not so for B. canis free dog sera. N-terminal amino acid sequence analysis of the crude hot saline extracts, showed that they contained copper-zinc superoxide dismutase, ribose ABC transporter and hypothetical protein of Brucella as antigens. A serological survey of canine serum samples conducted by means of an agglutination test using the antigen coated latex beads, showed that this method was more specific than the tube agglutination test using whole bacterial cell antigens. Although these results suggest that our method in which crude hot saline extracted antigens are coated on to latex beads would be useful in the serological diagnosis of canine brucellosis, we need further investigation using more serum samples to confirm the usefulness of our method. 相似文献
19.
20.
Since the 1990s, Brucella strains have been isolated from a wide variety of marine mammals and were recently recognized as two different species, i.e. Brucella pinnipedialis for pinniped isolates and Brucella ceti for cetacean isolates. The aim of this study was to identify specific DNA fragments of marine mammal Brucella strains using a previously described infrequent restriction site-PCR (IRS-PCR) method but with three new couples of restriction enzymes applied on a larger panel of marine mammal Brucella isolates (n=74) and one human isolate from New Zealand likely from marine mammal origin. This study revealed five DNA fragments specific of Brucella strains isolated from marine mammals. Among them two new DNA fragments were specific of B. pinnipedialis but were not detected in hooded seal isolates. DNA fragment I identified in the previous IRS-PCR study and fragment VI of this study were located on a cloned and sequenced 6kb SacI fragment. Its nucleotide sequence revealed that it is likely part of a putative genomic island. Sequence analysis showed that it carries four ORFs coding for putative metabolic functions. Although hooded seal isolates are classified within B. pinnipedialis it was shown in this study that they do not carry this genomic island and this raises the question about their evolutionary history within B. pinnipedialis. 相似文献