Insertion sequence profiling of UK Mycoplasma bovis field isolates     

Miles K  McAuliffe L  Persson A  Ayling RD  Nicholas RA 《Veterinary microbiology》2005,110(3-4):301-306

Mycoplasma equigenitalium and Mycoplasma subdolum have been associated with infertility, endometritis, vulvitis and abortions in mares, and with reduced fertility and balanoposthitis in stallions. Despite their role in equine genital disorder, determinants of virulence and pathogenesis as well as factors provoking specific host immune responses have not been identified, so far. To establish the major immunogenic components of Mycoplasma (M.) equigenitalium and M. subdolum, antigen profiles of their type strains as well as 30 clinical isolates were compared by SDS-PAGE and immunoblot analysis using hyperimmune rabbit sera and equine sera from clinical cases. To define the major protein antigens of both mycoplasma species, detergent-phase fractionation with Triton X-114 was performed. Western blot analysis of 30 clinical isolates revealed a high similarity of their overall antigen profile with only slight differences. In contrast, monospecific polyclonal antibodies raised against detergent-phase proteins of the two mycoplasma species identified three prominent proteins (pST17, pST42, and pET45) undergoing variation in expression and size among clinical and clonal isolates.  相似文献   

延胡索酸泰妙菌素对支原体和大肠杆菌混合感染的治疗试验     

陈凤梅  牛钟相  程光民  李娟  王勇 《中国兽药杂志》2005,39(1):49-52

以人工诱发鸡毒支原体和大肠杆菌混合感染为模型,以酒石酸泰乐菌素为对照药物,评价了延胡索酸泰妙菌素的疗效.按每1 L水中分别加入312.5、468、625 mg延胡索酸泰妙菌素及500 mg酒石酸泰乐菌素的用量给病鸡饮水给药,连用5 d.试验表明,用药组的成活率、日增重、料肉比、气囊损伤度与感染对照组比较差异极显著(P＜0.01);延胡索酸泰妙菌素大剂量组日增重与小剂量组比较差异显著(P＜0.05),与其他各用药组比较差异极显著(P＜0.01),料肉比与其他各用药组比较差异极显著(P＜0.01);酒石酸泰乐菌素组的料肉比与延胡索酸泰妙菌素小剂量组比较差异不显著(P＞0.05);而与其他各组比较差异极显著(P＜0.01).数据分析表明,延胡索酸泰妙菌素大剂量组能有效地降低气囊损伤度,提高饲料转化率.  相似文献   

The pathogenicity and pathogenesis of Mycoplasma capricolum subsp. capripneumoniae (F38) in the caprine mammary gland     

Darzi  M.M.  Sood  N.  Gupta  P.P.  Banga  H.S. 《Veterinary research communications》1998,22(3):155-165

The right mammary gland of 12 lactating goats was inoculated intracisternally with 1 ml of Mycoplasma capricolum subsp. capripneumoniae (Mcc) containing 10>⁶ colony-forming units (CFU), while their left mammary halves received 1 ml of sterile PPLO broth only. Two goats served as uninfected controls. The clinical mastitis that developed in the infected mammary halves within 24 h was initially acute but became increasingly chronic by the end of the experiment at 24 days post inoculation (DPI). The disease was characterized by atrophy of the infected mammary halves, leading to marked agalactia and an increase in somatic cell counts, with a preponderance of neutrophils initially and lymphocytes later. The Mycoplasma was re-isolated from infected mammary secretions up to 16 DPI but not from blood. Histopathology revealed that the mastitis was acute and purulent initially, followed by infiltration of lymphonuclear cells and fibroplasia in the lymphomononuclear cells and fibroplasia in the interacinar tissue, and later by massive fibrosis. Immunohistology demonstrated the presence of Mycoplasma-like bodies localized mainly on the surface of acinar/duct epithelial cells. The studies showed that Mcc was highly pathogenic in the caprine mammary gland.  相似文献   

羊肺炎霉形体病研究   总被引：12，自引：1，他引：11  

张道永  胡诚隆 《中国兽医学报》1998,18(1):55-59

１９８０～１９９２年,从四川、云南两省６个种羊场的进口种羊和阿坝、凉山、甘孜州共１０个县的本地绵羊和山羊病肺中分离出２５株霉形体。经理化特性鉴定、药敏试验、致病性测定,并与绵羊肺炎霉形体国际参考株Ｍ·Ｏ·Ｙ９８用生长抑制试验定型,证明这２５株霉形体均为绵羊肺炎霉形体（Ｍｙｃｏｐｌａｓｍａｏｖｉｐｎｅｕｍｏｎｉａｅ）。用微量间接血凝试验（ＩＨＡ）检测,Ｍ·Ｏ·Ｙ９８抗原与丝状霉形体山羊亚种Ｃ８７、丝状霉形体丝状亚种Ｃ８８、羊衣原体、布氏杆菌和羊副结核的抗体均无交叉反应。ＩＨＡ对人工感染羊和有呼吸道症状的自然病例的阳性检出率分别为９５％和８２．６％。试验表明,ＩＨＡ是一种简易、快速而可靠的诊断方法,适用于本病的群体检疫。对人工感染和自然感染发病羔羊进行药物防治试验,证明枝原净效果最好,剂量为每日每公斤体重２２．５ｍｇ,可以抑制肺炎病变的发展。２个试验组的肺炎实变平均值为０．１５±０．２８和０．５８±０．６３,而２个对照组则高达１１．９０±１４．０４和１４．５０±１２．６４。  相似文献   

鸡毒支原体C株的分离鉴定及与其它北京株结构蛋白的比较分析   总被引：1，自引：0，他引：1  

苗得园  陈德威  张大华  陈小玲 《中国兽医杂志》1998,24(8):5-7

本文对北京某鸡场气囊炎病进行了支原体的分离和鉴定,并将此分离株与北京另两个分离株ＢＧ４４Ｔ、ＮＢ７２的结构蛋白通过ＳＤＳ－ＰＡＧＥ进行了比较分析。结果表明此分离株（命名为Ｃ株）可发酵葡萄糖,不水解尿素和利用精氨酸,是一具有毒力较强的鸡毒支原体株。ＳＤＳ－ＰＡＧＥ结果表明,此分离株与ＮＢ７２株相当一致,与ＢＧ４４Ｇ株有相对较大的区别。我们认为,Ｃ株和ＮＢ７２株具有同源性,鸡胚液制造的活疫苗中支原体的污染可能源于鸡胚培养时采用了ＭＧ感染病鸡所产蛋,另外,还可看出北京地区的支原体感染存在着一定的多样性。  相似文献   

奶牛温氏支原体16SrRNA基因的PCR扩增、克隆及分析     

苏乾莲  黄维义  张为宇  陈明  拉伊萨 《中国兽医寄生虫病》2008,16(6):1-5

目的对奶牛温氏支原体16SrRNA基因进行PCR扩增及克隆分析。方法从自然感染体的广西奶牛无菌采集血液,分离温氏支原体并提取病原基因组,用血营养菌的16SrRNA基因的通用引物进行PCR扩增,将扩增产物克隆到PGEM-Teasy载体后进行溺,I序和分析,并与Genebank上搜索的温氏支原体相应序列进行比较,建立系统发育树。结果PCR扩增得到长约1．5kb的扩增片段,测序结果显示该片段全长为1453bp,同源性分析表明该序列与Neimark公布的温氏支原体（前称温氏附红细胞体）（AF016546）的16SrRNA基因序列同源性达到97．4％,与系统发育进化树表明本株温氏支原体同本地株的关系较近,而与国外株的新缘关系较远。国内公布的广西株同源性为99．8％。结论结果表明证实该病原为温氏支原体,从分子生物学水平证实了温氏支原体在广西的存在。由于本试验分离得到的牛温氏支原体与国外发表的牛温氏支原体核苷酸序列相差2．6％,因此两者的基因型存在一定的差异,这对该病的分子流行病学分析具有一定的意义。  相似文献   

鸡败血霉形体弱毒F株对鸡的致病性和免疫效力测定   总被引：1，自引：1，他引：1  

宁宜宝 《中国兽医学报》1999,19(3):264-266

以鸡败血霉形体弱毒Ｆ５和Ｆ３６株的新鲜培养物分别点眼和鼻内接种１日龄鸡雏,比较其对鸡的致病性和免疫原性。结果,在鼻内感染时,Ｆ５可使３０只鸡中的４只出现轻度气囊损伤,而Ｆ３６只使３０只中的１只出现轻度气囊损伤;点眼接种时,Ｆ５和Ｆ３６均不使感染鸡出现气囊损伤;Ｆ５与Ｆ３６接种鸡体内的抗体产生情况无明显区别,在强毒Ｒ株攻击后,２个代次菌株的接种鸡均能产生良好的免疫力,且无明显差异,但在维护体质量增加方面,Ｆ３６株略优于Ｆ５株。  相似文献   

Composition of the microbial communities in the gastrointestinal tract of perch (Perca fluviatilis L. 1758) and cestodes parasitizing the perch digestive tract     

Elena N. Kashinskaya  Evgeniy P. Simonov  Galina I. Izvekova  Aleksey N. Parshukov  Karl B. Andree  Mikhail M. Solovyev 《Journal of fish diseases》2020,43(1):23-38

Using the approach of sequencing the V3-V4 region of the 16S rRNA gene, we have analysed the bacterial diversity associated with the distinct compartments of the gastrointestinal tract of perch (Perca fluviatilis) and cestodes (Proteocephalus sp.) parasitizing their digestive tract. The dominant microbiota associated with cestodes (Proteocephalus sp.) was represented by bacteria from the genera Serratia, Pseudomonas and Mycoplasma. By comparing the associated microbiota of perch and cestodes, a clear difference in bacterial composition and diversity was revealed between the community from the stomach content and other parts of the gastrointestinal tract of fish. Microbiota associated with cestodes was not significantly different in comparison with microbiota of different subcompartments of perch (mucosa and content of intestine and pyloric caeca) (ADONIS, p > .05) excluding microbiota of stomach content (ADONIS, p ≤ .05). PICRUSt-based functional assessments of the microbial communities of perch and cestodes indicated that they mainly linked in terms of metabolism and environmental information processing and could play an important role in the nutrition and health of host.  相似文献   

牛支原体生长曲线的测定和培养基筛选     

邵倩  储岳峰  何生虎  逯忠新 《湖北农业科学》2012,(3):549-551

为筛选最适于牛支原体(Mycoplasma bovis)生长的培养基,利用活菌计数方法测定了牛支原体OF2株在改良Thiaucourt’s培养基、牛心汤培养基和改良KM2培养基中的生长曲线。结果发现,牛支原体在改良Thiaucourt’s培养基中生长30 h即可达到平台期,平均最高生长滴度7.0×109ccu/mL;在牛心汤培养基中生长40 h即可达到平台期,平均最高生长滴度4.0×109ccu/mL;在改良KM2培养基中生长50 h达到平台期,其平均最高生长滴度为7.0×108ccu/mL。结果表明,牛支原体在改良Thiaucourt’s培养基中生长快、滴度高,为下一步牛支原体灭活疫苗的研究提供了参考依据。  相似文献   

泰妙菌素的MIC测定     

冯贤  赵满正  林立伟  程君清  王力 《现代农业科技》2011,(7):338+346

采用试管2倍稀释法,测定了泰妙菌素对鸡毒支原体、大肠杆菌、金黄色葡萄球菌、类马链球菌的体外最小抑菌浓度(MIC)。结果表明:泰妙菌素对鸡毒支原体、大肠杆菌、金黄色葡萄球菌、类马链球菌的MIC分别为0.003 13、6.4、0.2、0.2μg/mL。对鸡毒支原体的MBC为0.006 25μg/mL。  相似文献