Cryo-electron tomography of periplasmic flagella in Borrelia burgdorferi reveals a distinct cytoplasmic ATPase complex

by Zhuan Qin, Jiagang Tu, Tao Lin, Steven J. Norris, Chunhao Li, Md A. Motaleb, Jun Liu Periplasmic flagella are essential for the distinct morphology and motility of spirochetes. A flagella-specific type III secretion system (fT3SS) composed of a membrane-bound export apparatus and a cytosolic ATPase complex is responsible for the assembly of the periplasmic flagella. Here, we deplo yed cryo-electron tomography (cryo-ET) to visualize the fT3SS machine in the Lyme disease spirocheteBorrelia burgdorferi. We show, for the first time, that the cytosolic ATPase complex is attached to the flagellar C-ring through multiple spokes to form the “spoke and hub” structure inB.burgdorferi. This structure not only strengthens structural rigidity of the round-shaped C-ring but also appears to rotate with the C-ring. Our studies provide structural insights into the unique mechanisms underlying assembly and rotation of the periplasmic flagella and may provide the basis for the development of novel therapeutic strategies against several pathogenic spirochetes.
Source: PLoS Biology: Archived Table of Contents - Category: Biology Authors: Source Type: research

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Conclusion: This study was the first to determine the frequency of hantavirus in the study region and it includes current data for B. burgdorferi. Consequently, it is recommended that similar studies be carried out on rodents in all the regions at risk. PMID: 30862151 [PubMed - as supplied by publisher]
Source: Turkish Journal of Medical Sciences - Category: General Medicine Tags: Turk J Med Sci Source Type: research
(Natural News) If you spend any amount of time outdoors or around animals, you’re at risk of Lyme disease. This infectious disease is transmitted by ticks, but it’s actually caused by a microbe, the Borrelia burgdorferi sensu lato bacteria. While many prevention methods focus on the ticks themselves, some researchers are looking into antimicrobial herbs...
Source: NaturalNews.com - Category: Consumer Health News Source Type: news
This article is protected by copyright. All rights reserved. PMID: 30854633 [PubMed - as supplied by publisher]
Source: European Journal of Immunology - Category: Allergy & Immunology Authors: Tags: Eur J Immunol Source Type: research
Authors: Weiss T, Zhu P, White H, Posner M, Wickiser JK, Washington MA, Barnhill J Abstract Lyme disease is a continuing threat to military personnel operating in arboriferous and mountainous environments. Here we present the case of a 24-year-old Second Lieutenant, a recent graduate from the United States Military Academy, with a history of Lyme disease who developed recurrent knee effusions following surgery to correct a hip impingement. Although gonococcal arthritis was initially suspected from preliminary laboratory results, a comprehensive evaluation contradicted this diagnosis. Despite antibiotic therapy, asp...
Source: Military Medicine - Category: International Medicine & Public Health Tags: Mil Med Source Type: research
CONCLUSION: It should be noted that detection of antibodies against B. burgdorferi s.l. is only an indirect evidence of the presence of this bacterium in the development of clinical signs of LD in humans. Laboratory LD tests should be performed in accordance with valid standards, positive and uncertain results must be confirmed by the Western Blot/Immunoblot assay. PMID: 30817877 [PubMed - in process]
Source: Central European Journal of Public Health - Category: International Medicine & Public Health Tags: Cent Eur J Public Health Source Type: research
CONCLUSION: The results of seroprevalence obtained in the present study confirm the possibility of infection with B. burgdorferi among respondents exposed to contact with ticks. PMID: 30817876 [PubMed - in process]
Source: Central European Journal of Public Health - Category: International Medicine & Public Health Tags: Cent Eur J Public Health Source Type: research
R. P. Smith et al.
Source: Emerging Infectious Diseases Journal - Category: Infectious Diseases Source Type: research
Publication date: Available online 27 February 2019Source: Ticks and Tick-borne DiseasesAuthor(s): Ellie L. Milnes, Grace Thornton, Alexandre N. Léveillé, Pauline Delnatte, John R. Barta, Dale A. Smith, Nicole NemethAbstractCervid babesiosis, caused by the protozoan hemoparasite Babesia odocoilei and transmitted by the blacklegged tick Ixodes scapularis, is an emerging disease of Canadian cervids. This pathogen has not yet been described in humans. Data are lacking on the role of migratory birds in the adventitious spread of Ba. odocoilei-infected ticks, as well as on the infection status of I. scapularis in ...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Publication date: Available online 26 February 2019Source: Ticks and Tick-borne DiseasesAuthor(s): Seungeun Han, Charles Lubelczyk, Graham J. Hickling, Alexia A. Belperron, Linda K. Bockenstedt, Jean I. TsaoAbstractBorrelia miyamotoi is a relapsing fever spirochete transmitted by ticks in the Ixodes ricinus complex. In the eastern United States, B. miyamotoi is transmitted by I. scapularis, which also vectors several other pathogens including B. burgdorferi sensu stricto. In contrast to Lyme borreliae, B. miyamotoi can be transmitted vertically from infected female ticks to their progeny. Therefore, in addition to nymphs a...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Borrelia miyamotoi disease (BMD) is a newly recognized borreliosis that is cotransmitted by ticks wherever Lyme disease is zoonotic. Unlike Borrelia burgdorferi sensu lato, the agent of Lyme disease, B. miyamotoi is closely related to relapsing fever spirochetes, such as Borrelia hermsii. Some authors have suggested that the disease caused by B. miyamotoi should be considered a hard-tick-transmitted relapsing fever, and thus, the main mode of confirming a diagnosis for that infection, microscopy to analyze a blood smear, may have clinical utility. To determine whether blood smears may detect B. miyamotoi in the blood of ac...
Source: Journal of Clinical Microbiology - Category: Microbiology Authors: Tags: Bacteriology Source Type: research
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