东莞地区犬接种狂犬病疫苗后抗体水平的检测

应用酶联免疫吸附试验(ELISA)对东莞市采集的809份犬血清进行检测,采用SYNBIOTICS软件进行分析.结果表明,抗体阳性数265份,抗体阳性率32.76%,其中检测免疫狂犬病多联苗的血清493份,抗体阳性数55份,抗体阳性率11.16%,检测免疫狂犬病单价疫苗的血清316份,抗体阳性数210份,抗体阳性率66.46%.     

广东省东莞市犬、猫衣原体血清学调查

应用正向间接血凝试验对东莞市采集的977份犬血清和126份猫血清进行了衣原体抗体检测,检测结果为犬抗体阳性28份,抗体阳性率2.87%;其中散养犬只抗体阳性数24份,抗体阳性率2.96%,三鸟批发市场肉用犬抗体阳性数3份,抗体阳性率3.61%,犬养殖抗体阳性数1份,抗体阳性率1.2%。猫抗体阳性3份,抗体阳性率2.38%。结果表明我市的犬、猫和外地输入东莞市的肉用犬都存在衣原体的感染。     

犬恶丝虫抗体dot-ELISA检测方法的建立

为快速诊断犬恶丝虫病，建立了犬恶丝虫抗体dot—ELISA检测方法，并与阻断试验、交叉反应试验、重复性试验、琼脂扩散试验和平行对照试验进行了比较。结果显示，制备的犬恶丝虫虫体粗制抗原与犬钩虫、犬弓首蛔虫和犬蠕形螨感染犬的阳性血清无交叉反应，检出犬恶丝虫阳性血清的最高抗体效价为1：1024，重复性好；建立的犬恶丝虫病dot—ELISA诊断方法的灵敏度比琼脂扩散试验和美国IDEXX实验室制备的犬恶丝虫病诊断试剂盒分别高2048倍和48倍。     

广东东莞地区犬、猫弓形虫血清学调查

应用正向间接血凝试验,对东莞市2005～2006年采集的629份犬、猫血清进行了弓形虫抗体检测,其中检测的610份犬血清,抗体阳性4份,抗体阳性检出率为0.66%,检测的19份猫血清中,抗体阳性0份,抗体阳性率为0。     

云南犬莱姆病血清抗体的调查研究

１９９９年采集云南地区１５６份犬血清进行间接免疫荧光法（ＩＦＡ）检测莱姆病血清抗体，在１５６份血清标本中检出≥１：６４的阳性标本５４份，阳性率为３４．６２％。调查首次发现云南地区存在犬莱姆病。     

间接ELISA检测犬细小病毒病血清抗体方法的建立

用犬肾细胞增殖犬细小病毒,经纯化﹑标化作为包被抗原,建立检测犬细小病毒抗体的间接ELISA方法。结果表明:抗原最佳包被浓度5μg/mL;血清最佳稀释度1:40,反应时间45min;酶标抗体最佳稀释度1:2000,反应时间45min;S/P≥0.240判为阳性,≤0.190判为阴性,介于二者之间为可疑。该抗原不与犬瘟热﹑犬传染性肝炎﹑犬冠状病毒病﹑猫泛白细胞减少症病原阳性血清反应;批内重复试验变异系数小于10%,批间重复试验变异系数小于15%;对20份免疫犬血清进行检测,阳性检出率为85%,明显高于血凝抑制试验(65%),符合率为80%。试验结果表明建立的间接ELISA检测犬细小病毒抗体方法特异、灵敏、可重复性好。     

大埔县犬布鲁氏菌病血清学调查

用布鲁氏菌虎红平板凝集试验对采自大埔县545犬血清进行布鲁氏菌抗体检测,然后用布鲁氏菌试管凝集方法对阳性样品或可疑阳性样品进行确诊,检测结果为抗体阳性数6份,抗体阳性率1.1%。其中散养犬只抗体阳性数2份,抗体阳性率0.4%;犬养殖场犬只抗体阳性数0份,抗体阳性率0%;农贸市场肉用犬抗体阳性数4份,抗体阳性率0.7%。结果表明我县的犬和外地输入大埔县的肉用犬都存在布鲁氏菌的感染。     

应用ELISA检测犬狂犬病抗体水平的探讨

为了解应用酶联免疫吸附试验(ELISA)检测犬狂犬病抗体水平的效果,对东莞市采集的54份犬血清应用ELISA进行检测,采用Synbiotics软件进行分析,同时将该批血清送至军事医学科学院军事兽医研究所作荧光抗体病毒中和试验(FAVN)比较.ELISA检出阳性数35份,阳性率为64.82%,与军事医学科学院军事兽医研究所的测定结果差异不显著,符合率为85.19%.证明应用ELISA检测犬狂犬病抗体水平定性检测具有较高的准确率,适合在短时间内监测大批量的血清样品.     

上海市闵行区宠物犬人兽共患病原体调查报告

为了解上海市闵行区宠物犬携带人兽共患病原体情况,我们收集上海市闵行区宠物医院采集的血液样本400份;利用SNAP快速检测技术筛查体外莱姆病抗体、犬型埃里希氏体症抗体、心丝虫抗原和嗜吞细胞无形体抗体,采用聚合酶链式反应(PCR)鉴定伯氏疏螺旋体、犬埃立克体和噬吞噬细胞无浆体三种病原体。结果显示,SNAP筛查发现2.16%的犬血液样本为犬型埃里希氏体症抗体阳性,后以PCR方法鉴定对应的血液样本均为犬埃立克体病原学阳性。本次调查结果表明闵行区宠物犬有人兽共患病原体犬埃立克体的感染,应加强宠物犬人兽共患病原体的日常监测与防控。     

检测犬恶丝虫病免疫层析试纸条的研制

以胶体金标SPA和犬恶丝虫抗原蛋白制备免疫层析试纸条,对300份犬血清进行检测,阳性检出率高达5.0%,同时用虫检法检测犬恶丝虫感染率,阳性检出率为4.0%。结果提示免疫层析试纸条具有操作简便、灵敏度高、特异性强的优点,可用于犬恶丝虫病的快速检测。     

Autoantibodies to recombinant canine proinsulin in canine diabetic patients

Objective

To determine whether dogs with spontaneously-occurring diabetes mellitus demonstrate serological reactivity to proinsulin.

Sample population

Serum samples were collected from 15 newly-diagnosed diabetic, 15 insulin-treated diabetic and 15 non-diabetic control dogs.

Procedures

Canine proinsulin was cloned into a prokaryotic expression vector to generate recombinant poly-histidine-tagged protein in Escherichia coli. A Western blotting assay was developed for detection of proinsulin autoantibodies in canine sera.

Results

Reactivity to canine proinsulin was detected in 3 of 15 control dogs, 8 of 15 newly-diagnosed diabetic dogs and 6 of 15 insulin-treated diabetic patients. Of these reactors, only 1 control dog, 1 newly-diagnosed diabetic dog and 3 insulin-treated diabetic dogs recognised porcine insulin by ELISA, suggesting that the remaining proinsulin reactors might have been recognising proinsulin-specific epitopes.

Conclusions and clinical relevance

This study suggests that proinsulin autoantibodies are present in a proportion of diabetic dogs. Further work is required to refine the assay and clarify the significance of these autoantibodies.     

辽宁省警犬犬瘟热犬细小病毒和犬冠状病毒感染情况调查

犬传染病是危害养犬业健康发展的主要疾病,来自警犬方面的统计资料证实,全国每年免疫警犬的发病率为14％,其中传染病占60％以上,因传染病而死亡的犬超过死亡犬总数的80％。从近几年的临床实践和国外的有关报道来看,危害严重的犬病毒病主要有犬瘟热、犬细小病毒感染、犬传染性肝炎、犬冠状病毒病、犬副流感及狂犬病等6种疾病,     

Establishment of canine and feline cells expressing canine signaling lymphocyte activation molecule for canine distemper virus study

Antimicrobial therapy is a useful tool to control bovine mastitis caused by Staphylococcus aureus, as consequence an increase in staphylococci resistant cases has been registered. Alternative strategies are desirable and bacteriocins represent attractive control agents to prevent bovine mastitis. The aim of this work was to evaluate the activity of five bacteriocins synthesized by Bacillus thuringiensis against S. aureus isolates associated to bovine mastitis. Fifty S. aureus isolates were recovered from milk composite samples of 26 Holstein lactating cows from one herd during September 2007 to February 2008 in México and susceptibility of those isolates to 12 antibiotics and 5 bacteriocins from B. thuringiensis was evaluated. S. aureus isolates were mainly resistant to penicillin (92%), dicloxacillin (86%), ampicillin (74%) and erythromycin (74%); whereas susceptibility to gentamicin, trimethoprim and tetracycline was detected at, respectively, 92%, 88%, and 72%. All S. aureus isolates showed susceptibility to the five bacteriocins synthesized by B. thuringiensis, mainly to morricin 269 and kurstacin 287 followed by kenyacin 404, entomocin 420 and tolworthcin 524. Our results showed that S. aureus isolates had differences in the antimicrobial resistance patterns and were susceptible to bacteriocins produced by B. thuringiensis, which could be useful as an alternative method to control bovine mastitis.