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本研究从贵州发病鸭中分离到1株致病菌,经生化试验、16S rRNA序列分析、血清学试验和动物回归试验,鉴定为1型鸭疫里氏杆菌(RA),药敏试验结果表明,其对头孢拉定、头孢曲松钠、头孢噻肟和氟苯尼考高度敏感;同时根据GenBank中鸭疫里氏杆菌ompA基因序列,设计1对引物,成功克隆出鸭疫里氏杆菌ompA基因,扩增产物大小为1149 bp。采用DNAStar Protean程序,综合运用二级结构、亲水性、可塑性和抗原性指数等参数,对鸭疫里氏杆菌ompA基因的氨基酸序列进行了B细胞表位预测,为进一步研究鸭疫里氏杆菌表位疫苗和分子诊断技术的建立奠定基础。 相似文献
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鸭疫里氏杆菌病又名鸭传染性浆膜炎,是由鸭疫里氏杆菌感染引起的一种接触性传染病,本病以出现纤维素性心包炎、肝周炎、气囊炎和脑膜炎为特征。 鸭疫里氏杆菌病于 1932年在美国纽约州长岛的鸭群中首次发生,曾先后被称为新鸭病、鸭败血症、鸭疫综合征、鸭疫巴氏杆菌病。 1993年 Segers等人利用分子生物学技术对本病病原菌的各种表型参数和基因特征进行分析,认为应将该菌放在单独的一个属,为纪念首先发现本菌的 Riemer氏 (1904),特将本菌的属名命名为 Riemerella,由本菌引起的鸭病命名为鸭疫里氏杆菌病 (Riemerella anatipestife… 相似文献
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<正>鸭疫里默氏杆菌(Riemerella anatipestifer,RA)简称鸭疫里氏杆菌,原名鸭疫巴氏杆菌,是引起鸭传染性浆膜炎的病原。鸭传染性浆膜炎是一种接触性、急性或慢性、败血性的传染病,且易与大肠杆 相似文献
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鸭疫里氏杆菌病病原的分离鉴定 总被引：1，自引：0，他引：1
鸭疫里氏杆菌(Riemerella anatipestifer,RA)病,是造成养鸭业严重经济损失的传染病之一。作者对某鸭场的病死鸭进行临床症状观察、病理剖检,通过细菌的分离培养及鉴定,确诊病死鸭病原为鸭疫里氏杆菌。鉴于养殖场中该病的存在及对养鸭业的危害,建议加强对鸭疫里氏杆菌病的诊断及监控。 相似文献
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鸭疫里氏杆菌病的研究进展 总被引：2，自引：0，他引：2
鸭疫里氏杆菌病是由鸭疫里氏杆菌(Riemerel-la anatipestifer,RA)引起的鸭、鹅、火鸡等多种禽类的一种急性或慢性传染病[1],又称为“新鸭病”“、鸭疫综合征”“、鸭败血症”“、鸭传染性浆膜炎”“、鸭疫巴氏杆菌感染”和“鸭疫雷摩氏菌病”。本病呈急性或慢性败血症过程,以纤 相似文献
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泰乐菌素系动物专用的大环内酯抗生素，临床上常用于预防和治疗由支原体、巴氏杆菌、葡萄球菌引起的各种呼吸道、肠道和运动系统感染。而该药对鸭疫里氏杆菌的抑杀作用未见详细报道，为此，我们进行泰乐菌素对鸭疫里氏杆菌的体外抑菌试验，以便为临床用药提供科学依据，现将试验结果报告如下：１材料与方法１．１试验菌株５株鸭疫里氏杆菌是本中心从本省发病鸭场病死鸭中分离鉴定的菌株，分别用RA１、RA２、RA３、RA４、RA５简称之。其中RA１、RA２是从同一鸭场间隔１个月分离的２个菌株。１．２试验药物、药敏纸片及培养基酒石酸泰乐… 相似文献
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从临床病鸭中分离并鉴定了1型鸭疫里默氏杆菌,并在提取鸭疫里默氏杆菌的基因组DNA后,用Sau3A I酶切,回收大小为0．07～4 kb的片段;将酶切片段与酶切的质粒载体pRSET连接后,电转化大肠杆菌Rosetta,成功构建了1型鸭疫里默氏杆菌的基因组文库,经检测库容量约为40000个。随机筛选30个单菌落,用pRSET通用引物进行PCR鉴定,统计结果显示插入片段的大小93．3％在1～3 kb范围内,成功构建了鸭疫里默氏杆菌基因组文库,为鸭疫里默氏杆菌功能基因的克隆及鉴定奠定了基础。 相似文献
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B Huang S Subramaniam K L Chua J Kwang H Loh J Frey H M Tan 《Veterinary microbiology》1999,67(3):213-219
Riemerella anatipestifer is a gram-negative rod-shaped bacterium associated with epizootic infections in poultry. A total of 35 R. anatipestifer isolates including the type strain ATCC11845T, reference and field strains for 18 different serotypes were characterized by repetitive sequence based-PCR (rep-PCR) with outwardly-directed primers based on the repetitive extragenic palindromic (REP) consensus sequence. This technique was applied by using either extracted genomic DNA or preparation of whole bacterial cells harvested directly from plate cultures. Rep-PCR discriminated the R. anatipestifer isolates into 19 electrophoretic types. DNA fingerprints obtained from rep-PCR of extracted genomic DNA or from preparations of whole cells yielded comparable patterns. Substantial variation was seen among the rep-PCR fingerprints of different serotypes. Moreover, different polymorphisms of the rep-PCR fingerprints were evident among epidemiologically unrelated isolates of the same serotype. These results suggest the presence of repetitive extragenic palindromic-like elements within the genome of R. anatipestifer that can be used in some isolates to discriminate between different strains belonging to the same serotype. Rep-PCR may serve as a useful molecular tool for subtyping R. anatipestifer isolates for epidemiologic investigations. The whole cell procedure offers the advantage of ease of performance requiring only small quantities of cells. 相似文献
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在鸭疫里默氏杆菌外膜蛋白保守区设计了一对特异性引物,建立PCR方法,对5株已知血清型的鸭疫里默氏杆菌纯培养菌和6株临床分离未定型的里默氏杆菌菌株以及病死鸭病料组织进行检测,结果表明不同样品都可扩增出592bp的特异目的条带,而对鸭源大肠杆菌、鸭源多杀性巴氏杆菌、鸭源沙门氏菌的扩增结果均为阴性,说明该PCR法具有较好的特异性,可用于快速鉴定鸭疫里默氏杆菌,也适用于病料的直接检测. 相似文献
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So-called Moraxella (or Pasteurella) anatipestifer and members of the Flavobacterium/Cytophaga group exhibit remarkable common features: lack of flagellation, low guanine + cytosine content of the chromosomal DNA, production of menaquinones and branched-chain fatty acids, absence of carbohydrate fermentation, and similar patterns of hydrolytic enzymes. Using the renaturation method of DNA:DNA hybridization two urease-negative European isolates and the urease-positive type strain (which was isolated in the United States) of M. P. anatipestifer were shown to have about 85% of their genome DNA base sequences in common; they may represent two subspecies. The type strain of this species was neither measurably related to the type species of the genus Moraxella nor to selected members of the family Pasteurellaceae (Pohl 1981). On the other hand, low but significant degrees of DNA binding between selected strains of so-called M. anatipestifer, Cytophaga marinoflava, Flavobacterium meningosepticum, F. odoratum and F. pectinovorum were observed. On the basis of these findings the transfer of the so-called M. anatipestifer to the Flavobacterium/Cytophaga group (family Cytophagaceae) is proposed. More detailed investigations are required to establish its relationship at the genus level. 相似文献
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鸭疫里默氏菌病和大肠杆菌病多重PCR诊断方法的建立 总被引：3，自引：0，他引：3
参考GenBank中鸭疫里默氏菌和大肠杆菌的外膜蛋白A(OmpA)基因序列,应用PrimerPremier5.0软件在二者高度保守区设计了2对引物,建立了适合鸭疫里默氏菌和大肠杆菌的快速检测的多重PCR检测方法。以该方法对已分离并保存的鸭疫里默氏菌和大肠杆菌进行PCR扩增,分别扩增出与试验设计相符的670、408bp的特异性DNA片段。将扩增所得的DNA片段进行克隆测序,测序结果表明分别为鸭疫里默氏菌和大肠杆菌OmpA基因序列。该方法对鸭疫里默氏菌和大肠杆菌的检测下限分别为4×104CFU/mL和3×104CFU/mL。表明所建立的PCR方法具有特异、快速和敏感的特点,可用于诊断鸭疫里默氏菌、大肠杆菌以及两者的混合感染。 相似文献
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DNA was isolated from 15 strains of Pasteurella anatipestifer and from one strain each of Moraxella nonliquefaciens, M. bovis, Pasteurella multocida, P. haemolytica, P. gallinarum, P. pneumotropica, and P. ureae. The guanine-plus-cytosine contents of P. anatipestifer ranged from 32 to 35 mole %, whereas those of Moraxella and Pasteurella spp. were much higher, ranging from 40 to 45 mole %. DNA-DNA hybridization analysis revealed that homology of nine P. anatipestifer strains to strains ATCC 11845 and PA 15 was 52 to 100%, whereas homology of Moraxella and Pasteurella strains to these strains was only 3 to 17%. Similarly, homology of P. anatipestifer strains, Moraxella, and Pasteurella species other than P. multocida to P. multocida reference strain P-2192 was low. These results strongly suggest that P. anatipestifer is genetically unrelated to either Pasteurella or Moraxella. 相似文献
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Vaccination of ducks with recombinant outer membrane protein (OmpA) and a 41 kDa partial protein (P45N') of Riemerella anatipestifer. 总被引：9，自引：0，他引：9
Bin Huang Sumathi Subramaniam Joachim Frey Hilda Loh Hai-Meng Tan Charlene J Fernandez Jimmy Kwang Kim-Lee Chua 《Veterinary microbiology》2002,84(3):219-230
The generation of protective immunity against Riemerella anatipestifer infection in ducks were investigated by immunizations with recombinant glutathione sulfatransferase (GST) fusion's proteins of OmpA, a 42kDa major outer membrane protein, and P45N', a 41kDa N-terminal fragment of a newly identified 45kDa potential surface protein from R. anatipestifer. The DNA encoding OmpA and P45N' were isolated from R. anatipestifer serotype 15 (field strain 110/89) and serotype 19 (reference strain 30/90), respectively. Immunoblotting and ELISA results showed that the purified recombinant proteins induced the production of antibodies in immunized ducks. However, neither was protective against subsequent challenge with the virulent serotype 15 strain, 34/90. All the five ducks immunized with formalinized R. anatipestifer strain 34/90 survived the challenge with the homologous strain whereas six out of seven ducks in the non-immunized control group died within a week following the challenge. 相似文献
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Development of an ELISA using a recombinant 41 kDa partial protein (P45N') for the detection of Riemerella anatipestifer infections in ducks 总被引：5，自引：0，他引：5
Riemerella anatipestifer, a gram-negative bacillus, is the causative agent of duck septicemia, a disease which could incur much economic loss in the duck industry. An indirect enzyme-linked immunosorbent assay (ELISA) has been developed to facilitate early detection of R. anatipestifer infection in ducks. The antigen used was a recombinant 41 kDa N-terminal fragment (rP45N') of a newly characterized R. anatipestifer potential surface protein, P45, which was expressed in Escherichia coli as an N-terminal GST fusion protein. The rP45N'-based ELISA successfully detected P45 antibodies in the sera of 20 ducks immunized with bacterin preparations of R. anatipestifer serotypes 1, 10 15, 19 and the ATCC11845 strain. Antibodies to P45 were also detected in the sera of 25% (75/296) of White Pekin ducks which were imported into Singapore from three different farms. Successful discrimination was obtained between sera from infected ducks and that of specific-pathogen free ducks (p<0.01). The rP45N'-GST antigen did not cross-react with antibodies in sera from guinea pigs which were infected with other gram-negative and gram-positive bacterial pathogens, including Aeromonas hydrophila, Citrobacter freundii, E. coli, Klebsiella pneumoniae, Pastuerella multocida, Proteus mirabilis, Salmonella spp., Serratia maccescens, Shigella sonnei and Yersinia enterocolitica. In addition, the DNA sequence encoding P45 was detected in R. anatipestifer serotypes 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 14, 15, 16, 17, 18, 19 and the ATCC11845 strain, suggesting that P45 is probably also universally expressed in these R. anatipestifer serotypes. Thus, the ELISA described is applicable to the detection of R. anatipestifer infection in ducks. 相似文献
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Detection of florfenicol resistance genes in Riemerella anatipestifer isolated from ducks and geese 总被引：1，自引：0，他引：1
The cat gene, coding for chloramphenicol acetyltransferase has been reported for conferring the chloramphenicol resistance for Riemerella anatipestifer. Chloramphenicol acetyltransferases, however, are unable to inactivate florfenicol. In this study, 66 R. anatipestifer isolates were investigated for their susceptibility to chloramphenicol and florfenicol and the presence of floR gene. Results showed nine florfenicol intermediate or resistant R. anatipestifer isolates were all floR positive. The expression of floR gene in E. coli and inhibition studies with PAβN indicated that the floR gene was as an efflux pump conferring resistance to both chloramphenicol and florfenicol. Southern hybridization revealed the floR was located in the plasmid DNA of five isolates and in the chromosomal DNA of four isolates. Furthermore, two novel floR-carrying plasmids designated pRA0726 and pRA0846 were sequenced completely. pRA0726 was 11,704 bp in size with 10 putative open reading frames which included the floR, catB and bla(OXA-209) resistance genes. The most differences between sequences of pRA0846 and pRA0726 were the absence of a bla(OXA-209) gene and the deletion of 321 nucleotides of orf1 in pRA0846. Plasmid curing tests demonstrated that pRA0726 carried functional coding proteins for resistance to phenicol and β-lactam antimicrobials. To the best of our knowledge, this is the first report of presence of the floR and bla(OXA-209) resistance genes in R. anatipestifer. 相似文献