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Genetic Manipulation of Borrelia Spp.

Genetic Manipulation of Borrelia Spp. Curr Top Microbiol Immunol. 2017 Sep 17;: Authors: Drecktrah D, Samuels DS Abstract The spirochetes Borrelia (Borreliella) burgdorferi and Borrelia hermsii, the etiologic agents of Lyme disease and relapsing fever, respectively, cycle in nature between an arthropod vector and a vertebrate host. They have extraordinarily unusual genomes that are highly segmented and predominantly linear. The genetic analyses of Lyme disease spirochetes have become increasingly more sophisticated, while the age of genetic investigation in the relapsing fever spirochetes is just dawning. Molecular tools available for B. burgdorferi and related species range from simple selectable markers and gene reporters to state-of-the-art inducible gene expression systems that function in the animal model and high-throughput mutagenesis methodologies, despite nearly overwhelming experimental obstacles. This armamentarium has empowered borreliologists to build a formidable genetic understanding of the cellular physiology of the spirochete and the molecular pathogenesis of Lyme disease. PMID: 28918538 [PubMed - as supplied by publisher]
Source: Current Topics in Microbiology and Immunology - Category: Microbiology Tags: Curr Top Microbiol Immunol Source Type: research

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This article is protected by copyright. All rights reserved. Borrelia burgdorferi, Lyme disease agent, harbors no enzymes to synthesize or degrade polyamines yet does contain the genes encoding a putative polyamine uptake system (potABCD). Here, we demonstrated that the PotABCD is a spermidine‐specific transporter system that is essential for survival. The genes are upregulated during tick feeding concomitantly with the decrease of osmoliarity which has been shown to trigger virulence factor expression. The potABCD genes are regulated in a RpoN‐dependent, RpoS‐independent, BosR‐independent fashion.
Source: Molecular Microbiology - Category: Microbiology Authors: Tags: Research Article Source Type: research
Publication date: 3 April 2018 Source:Neuroscience Letters, Volume 671 Author(s): Geetha Parthasarathy, Mario T. Philipp Lyme neuroborreliosis, caused by the gram-negative bacterium Borrelia burgdorferi, may affect the central and/or peripheral nervous systems. In previous studies, we showed that human oligodendrocytes exposed to the bacteria undergo apoptosis in an inflammatory environment, and that inflammatory pathways trigger cell-death pathways. We further demonstrated that several receptor tyrosine kinases were involved in triggering downstream effects, leading to inflammation and apoptosis. Toll-like receptors TLR2...
Source: Neuroscience Letters - Category: Neuroscience Source Type: research
Borrelia burgdorferi infection is common in horses living in Lyme endemic areas and the geographic range for exposure is increasing. Morbidity after B. burgdorferi infection in horses is unknown. Documented, naturally occurring syndromes attributed to B. burgdorferi infection in horses include neuroborreliosis, uveitis, and cutaneous pseudolymphoma. Although other clinical signs such as lameness and stiffness are reported in horses, these are often not well documented. Diagnosis of Lyme disease is based on exposure to B. burgdorferi, cytology or histopathology of infected fluid or tissue and antigen detection. Treatment of...
Source: Journal of Veterinary Internal Medicine - Category: Veterinary Research Authors: Tags: ACVIM Consensus Statement Source Type: research
Conclusion: NFS is a unique tool that can be used universally to assess the condition of patients with LD.
Source: Journal of Global Infectious Diseases - Category: Infectious Diseases Authors: Source Type: research
Authors: Boyer PH, Kieffer P, de Martino SJ, Zilliox L, Vogel JY, Jaulhac B, Hansmann Y PMID: 29449048 [PubMed - as supplied by publisher]
Source: Medecine et Maladies Infectieuses - Category: Infectious Diseases Tags: Med Mal Infect Source Type: research
In this study using 3956 control sera, we demonstrated that although this 2-tier testing algorithm does significantly improve diagnostic specificity compared with each of the EIAs individually, the WCS EIA and the C6 peptide EIA are not independent tests.
Source: Diagnostic Microbiology and Infectious Disease - Category: Microbiology Authors: Source Type: research
(Columbia University's Mailman School of Public Health) A new blood test called the Tick-Borne Disease Serochip (TBD Serochip) promises to revolutionize the diagnosis of tick-borne disease by offering a single test to identify and distinguish between Borrelia burgdorferi, the pathogen responsible for Lyme disease, and seven other tick-borne pathogens. Led by scientists at the Center for Infection and Immunity (CII) at Columbia University's Mailman School of Public Health, the research team report details on the new test in the journal Nature: Scientific Reports.
Source: EurekAlert! - Infectious and Emerging Diseases - Category: Infectious Diseases Source Type: news
This study indicates that I. scapularis occurs throughout the southern-most portion of province, in close proximity to coastlines and major waterways. Milder winter conditions, as indicated by the number of degree days < 0 °C, was determined to be a strong predictor of tick occurrence, as was, to a lesser degree, rising levels of annual precipitation, leading to a final model with a predictive accuracy of 0.845 (range: 0.828-0.893). Both RCP 4.5 and RCP 8.5 climate projections predict that a significant proportion of the province (roughly a quarter to a third) will be highly suitable for I. scapularis by the 208...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Conclusions This study confirms that subclinical Borrelia seroconversion is common in south-eastern Sweden. The findings further suggest that male sex, younger age together with B. gariniii induced levels of IL-10, IL-17A and CCL20 may be associated with a subclinical course.
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Publication date: Available online 16 February 2018 Source:Ticks and Tick-borne Diseases Author(s): Ana Cláudia Norte, David Costantini, Pedro Miguel Araújo, Marcel Eens, Jaime Albino Ramos, Dieter Heylen By draining resources, microparasites can negatively affect the host fitness, which in turn can result in reduced transmission when virulence leads to reductions in host population size. Therefore, for a microparasite to persist in nature, the level of harm it can do to its host is expected to be limited. We tested this hypothesis for tick-borne Borrelia burgdorferi sensu lato (s.l.) infections in the black...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
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