• In this study, we have identified and characterized an elaborate genetic system in the Lyme disease spirochete B. burgdorferi that promotes extensive antigenic variation of a 34-kDa surface-exposed lipoprotein, VlsE. (uth.edu)
  • B. burgdorferi sensu stricto resides in the cerebrospinal fluid of mammals in Europe and the United States and is most often associated with Lyme arthritis. (mooneylab.com)
  • Complement inhibitor factor H binding to Lyme disease spirochetes is mediated by inducible expression of multiple plasmid-encoded outer surface protein E paralogs. (ouhsc.edu)
  • Lyme arthritis, for example, occurs mainly in infections with B. burgdorferi s. s. (altmeyers.org)
  • Additional B. burgdorferi sensu lato genospecies are suspected of causing illness, but are not confirmed by culture. (newworldencyclopedia.org)
  • Especially within the human pathogenic genospecies (B. burgdorferi s. s. (altmeyers.org)
  • The spirochete travels from the tick mid-gut during tick feeding, to the tick salivary glands and into the mammal host, and it is believed that this migration is facilitated by changes in expression of different B. burgdorferi genes. (thenativeantigencompany.com)
  • To do so, we performed next-generation RNA sequencing on doxycycline-treated spirochetes and treated spirochetes following regrowth, comparing them to untreated B. burgdorferi . (frontiersin.org)
  • Detailed studies of B. burgdorferi were initiated in 1982 used by tick-borne spirochetes to adapt for transmission by when Burgdorfer and coworkers reported these bacteria in their tick vectors, may lead to unique disease prevention strat- adult Ixodes scapularis ticks collected from vegetation on egies. (cdc.gov)
  • The life transmission cycle of B. burgdorferi requires migration of spirochetes from tick's gut to its salivary glands during vertebrate's blood sucking, penetrating to the vertebrate's tissues and their colonization. (aaem.pl)
  • Our goal was to examine gene transcription by B. burgdorferi following doxycycline treatment in an effort to identify both persister-associated genes and possible targets for antimicrobial intervention. (frontiersin.org)
  • Genes upregulated in the treated B. burgdorferi included a number of Erp genes and rplU , a 50S ribosomal protein. (frontiersin.org)
  • Studies are underway to determine if these same genes are perturbed in B. burgdorferi treated with doxycycline in a host environment. (frontiersin.org)
  • Associated with the loss of plasmids is a loss in the ability of the organism to infect laboratory animals , suggesting that the plasmids encode key genes involved in virulence. (newworldencyclopedia.org)
  • The plasmids are atypical, as compared to most bacterial plasmids, since they contain many paralogous sequences, a large number of pseudogenes and, in some cases, essential genes. (prospecbio.com)
  • B. burgdorferi sensu stricto (predominant in North America, but also in Europe), B. afzelii, and B. garinii (both predominant in Eurasia). (newworldencyclopedia.org)
  • At present, diagnostic tests are based only on B. burgdorferi sensu stricto (the only species present in the United States), B. afzelii, and B. garinii. (newworldencyclopedia.org)
  • Like B. garinii, B. burgdorferi is a trigger of neuroborreliosis. (altmeyers.org)
  • Genetic exchange, including plasmid transfers, contributes to the pathogenicity of the organism. (newworldencyclopedia.org)
  • B. burgdorferi sensu stricto commonly undergoes genome-wide genetic exchange, including plasmid transfers. (mooneylab.com)
  • We describe how B. burgdorferi and B. hermsii change their outer surface during their alternating infections in ticks and mammals, which in turn suggests biological functions for a few surface-exposed lipoproteins. (cdc.gov)
  • Simultaneously, results obtained in 2010 were compared to infection rates from 2005 to evaluate the development of B. burgdorferi s.l. infection rates in Hanoverian ticks. (biomedcentral.com)
  • Overall, 22.7% (476/2,100) of collected ticks were tested positive for B. burgdorferi s.l. infections. (biomedcentral.com)
  • Comparing B. burgdorferi s.l . infections in Hanoverian I. ricinus ticks in 2010 with data from 2005, a statistically significant increase of infected larvae was noted, whereas the other stages revealed no statistically significant differences. (biomedcentral.com)
  • Transmission of B. burgdorferi s.l. from ticks to hosts may occur through different developmental stages of I. ricinus, as transstadial transmission is very efficient. (biomedcentral.com)
  • The vls locus with the vlsE site, as it is present in strain B. burgdorferi B31, encodes a lipoprotein, a fatty protein, that allows B. burgdorferi to infect various mammalian hosts. (wikipedia.org)
  • However, the isolates lack various genomic regions seen in B. burgdorferi such as the region that codes for CspZ (complement inhibitor) and BB_K32 (fibronectin binding protein). (wikipedia.org)
  • A 28-kilobase linear plasmid of B. burgdorferi B31 (lp28-1) was found to contain a vmp-like sequence (vls) locus that closely resembles the variable major protein (vmp) system for antigenic variation of relapsing fever organisms. (uth.edu)
  • B. burgdorferi sensu stricto has a linear plasmid (lp54) which carries a two-gene operon encoding two surface lipoproteins, DbpA and DbpB, both of which bind Decorin Binding Protein A (DbpA). (thenativeantigencompany.com)
  • One of the most striking features of B. burgdorferi as compared with other bacteria is its unusual genome, which is far more complex than that of its spirochetal cousin Treponema pallidum, the agent of syphilis. (newworldencyclopedia.org)
  • [9] The genome of B. burgdorferi includes a linear chromosome approximately one megabase in size, and 21 plasmids (12 linear and 9 circular)-the largest number of plasmids (double-stranded DNA molecules separate from the chromosomal DNA ) found in any known bacterium [10] . (newworldencyclopedia.org)
  • This frequent recombination implies a potential for rapid adaptive evolution as well as a possible polygenic basis of B. burgdorferi sensu stricto pathogenicity. (mooneylab.com)
  • B. burgdorferi has 15 silent cassettes with a vlsE expression site. (wikipedia.org)
  • This combinatorial form of antigenic variation could potentially yield millions of VlsE variants in the mammalian host, and thereby contribute to immune evasion, long-term survival, and pathogenesis of B. burgdorferi. (uth.edu)
  • Isolates showing evidence for plasmid-chromosome recombination. (cdc.gov)
  • In the set of experiments described in this report, two keys aspects of doxycycline-treated B. burgdorferi phenotype were evaluated. (frontiersin.org)
  • The presence of lp28-1 correlates with the high-infectivity phenotype in B. burgdorferi strains tested. (uth.edu)
  • Detection of recA amplicon of B. burgdorferi in the presence of human genomic DNA in a multiplex real-time PCR assay We had PRIMA-1MET manufacturer already optimized molecular beacons and PCR conditions for quantitative detection of B. burgdorferi DNA by real-time PCR [61]. (pkc-inhibitors.com)
  • [11] Long-term culture of B. burgdorferi results in a loss of some plasmids and changes in expressed proteins. (newworldencyclopedia.org)
  • The location of DbpA and DbpB in the outer membrane of B. burgdorferi allows exposure of these proteins to the host immune system. (thenativeantigencompany.com)
  • OspA serotype 1 corresponds to the species B. burgdorferi s.s. (altmeyers.org)
  • If the sequence result was of low quality, the amplicon was cloned into a plasmid vector using a TOPO TA cloning kit (Invitrogen, Carlsbad, California) and then sequenced using the primers provided with the kit. (who.int)
  • These unusual properties of borreliae are associated with large number of plasmids, which show a high variability as a result of recombination with each other. (aaem.pl)
  • The Burrelia Burgdorferi Abtibody Elisa 5.08 reagent is RUO (Research Use Only) to test human serum or cell culture lab samples. (mooneylab.com)
  • It has a linear chromosome with an additional 15 plasmids, eight linear and seven circular. (wikipedia.org)
  • Analysis of the results of expression studies of the luxS gene shows that the molecular mechanisms of this phenomenon in B. burgdorferi are only fragmentarily known. (aaem.pl)
  • 2009). Another mechanism of immune evasion is the ability of B. burgdorferi to bind host-specific complement regulators (Reconectin/FHL-1 and Factor H) to the cell surface. (altmeyers.org)
  • Resistance to β-lactams is commonly due to cells containing plasmid encoded β-lactamases. (toku-e.com)