scholarly journals There Is a Method to the Madness: Strategies to Study Host Complement Evasion by Lyme Disease and Relapsing Fever Spirochetes

2017 ◽  
Vol 8 ◽  
Author(s):  
Ashley L. Marcinkiewicz ◽  
Peter Kraiczy ◽  
Yi-Pin Lin
Keyword(s):  
Lyme Disease ◽  
Relapsing Fever

scholarly journals Microbiological features distinguishing Lyme disease and relapsing fever spirochetes

2018 ◽  
Vol 130 (15-16) ◽  
pp. 484-490 ◽  
Author(s):  
Sven Bergström ◽  
Johan Normark
Keyword(s):  
Lyme Disease ◽  
Relapsing Fever

scholarly journals The Relapsing Fever Spirochete Borrelia hermsiiContains Multiple, Antigen-Encoding Circular Plasmids That Are Homologous to the cp32 Plasmids of Lyme Disease Spirochetes

2000 ◽  
Vol 68 (7) ◽  
pp. 3900-3908 ◽  
Author(s):  
Brian Stevenson ◽  
Stephen F. Porcella ◽  
Katrina L. Oie ◽  
Cecily A. Fitzpatrick ◽  
Sandra J. Raffel ◽  
...  
Keyword(s):  
Lyme Disease ◽  
Direct Detection ◽  
Human Infection ◽  
Relapsing Fever ◽  
Borrelia Hermsii ◽  
Functional Studies ◽  
Dna Library ◽  
Multiple Antigen ◽  
Antigenic Proteins

ABSTRACT Borrelia hermsii, an agent of tick-borne relapsing fever, was found to contain multiple circular plasmids approximately 30 kb in size. Sequencing of a DNA library constructed from circular plasmid fragments enabled assembly of a composite DNA sequence that is homologous to the cp32 plasmid family of the Lyme disease spirochete,B. burgdorferi. Analysis of another relapsing fever bacterium, B. parkeri, indicated that it contains linear homologs of the B. hermsii and B. burgdorfericp32 plasmids. The B. hermsii cp32 plasmids encode homologs of the B. burgdorferi Mlp and Bdr antigenic proteins and BlyA/BlyB putative hemolysins, but homologs of B. burgdorferi erp genes were absent. Immunoblot analyses demonstrated that relapsing fever patients produced antibodies to Mlp proteins, indicating that those proteins are synthesized by the spirochetes during human infection. Conservation of cp32-encoded genes in differentBorrelia species suggests that their protein products serve functions essential to both relapsing fever and Lyme disease spirochetes. Relapsing fever borreliae replicate to high levels in the blood of infected animals, permitting direct detection and possible functional studies of Mlp, Bdr, BlyA/BlyB, and other cp32-encoded proteins in vivo.

scholarly journals Blood Smears Have Poor Sensitivity for ConfirmingBorrelia miyamotoiDisease

2019 ◽  
Vol 57 (3) ◽  
Author(s):  
Sam R. Telford ◽  
Heidi K. Goethert ◽  
Philip J. Molloy ◽  
Victor Berardi
Keyword(s):  
Lyme Disease ◽  
Morphological Evidence ◽  
Hard Tick ◽  
Borrelia Miyamotoi ◽  
Relapsing Fever ◽  
Main Mode ◽  
Blood Samples ◽  
Content Type ◽  
Blood Smears ◽  
Thick Smear

ABSTRACTBorrelia miyamotoidisease (BMD) is a newly recognized borreliosis that is cotransmitted by ticks wherever Lyme disease is zoonotic. UnlikeBorrelia burgdorferisensu lato, the agent of Lyme disease,B. miyamotoiis closely related to relapsing fever spirochetes, such asBorrelia hermsii. Some authors have suggested that the disease caused byB. miyamotoishould 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 detectB. miyamotoiin the blood of acute BMD patients, we made standard malariological thick smears from anticoagulated blood samples that were previously determined to contain this agent (by PCR) and analyzed them for morphological evidence of spirochetes. Spirochetes were not detected in the blood smears from 20 PCR positive patient blood samples after examination of 100 thick smear fields and only 2 of 20 demonstrated spirochetes when the examination was extended to 300 thick smear fields. Inoculation of severe combined immunodeficient (SCID) mice yielded isolates from 5 of 5 samples, but 0 of 3 BALB/c mice became infected. We conclude that in strong contrast to the diagnosis of typical relapsing fever, microscopy of blood smears is not sensitive enough for confirming a diagnosis of BMD but that SCID mouse inoculation could be a useful complement to PCR.

scholarly journals A novel Borrelia species, intermediate between Lyme disease and relapsing fever groups, in neotropical passerine-associated ticks

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Florian Binetruy ◽  
Stéphane Garnier ◽  
Nathalie Boulanger ◽  
Émilie Talagrand-Reboul ◽  
Etienne Loire ◽  
...  
Keyword(s):  
Lyme Disease ◽  
Relapsing Fever

scholarly journals Uptake and killing of Lyme disease and relapsing fever borreliae in the perfused rat liver and by isolated Kupffer cells.

1996 ◽  
Vol 64 (5) ◽  
pp. 1858-1861 ◽  
Author(s):  
V Sambri ◽  
R Aldini ◽  
F Massaria ◽  
M Montagnani ◽  
S Casanova ◽  
...  
Keyword(s):  
Lyme Disease ◽  
Rat Liver ◽  
Kupffer Cells ◽  
Perfused Rat Liver ◽  
Relapsing Fever
Sign in / Sign up

Export Citation Format

Share Document