Results 51 to 60 of about 3,523 (182)

Which Way In? The RalF Arf-GEF Orchestrates Rickettsia Host Cell Invasion. [PDF]

PLoS Pathogens, 2015
Bacterial Sec7-domain-containing proteins (RalF) are known only from species of Legionella and Rickettsia, which have facultative and obligate intracellular lifestyles, respectively. L.
Kristen E Rennoll-Bankert, M Sayeedur Rahman, Joseph J Gillespie, Mark L Guillotte, Simran J Kaur, Stephanie S Lehman, Magda Beier-Sexton, Abdu F Azad   +7 more
doaj   +1 more source

S -Adenosylmethionine Transport in Rickettsia prowazekii [PDF]

Journal of Bacteriology, 2003
ABSTRACT Rickettsia prowazekii , the causative agent of epidemic typhus, is an obligate, intracellular, parasitic bacterium that grows within the cytoplasm of eucaryotic host cells. Rickettsiae exploit this intracellular environment by using transport systems for the compounds available in the host cell's cytoplasm ...
Aimee M, Tucker, Herbert H, Winkler, Lonnie O, Driskell, David O, Wood   +3 more
openaire   +2 more sources

Acquisition of thymidylate by the obligate intracytoplasmic bacterium Rickettsia prowazekii [PDF]

Journal of Bacteriology, 1991
The pathway for the acquisition of thymidylate in the obligate bacterial parasite Rickettsia prowazekii was determined. R. prowazekii growing in host cells with or without thymidine kinase failed to incorporate into its DNA the [3H]thymidine added to the culture. In the thymidine kinase-negative host cells, the label available to the rickettsiae in the
R R, Speed, H H, Winkler
openaire   +2 more sources

Pediculosis capitis y transmisión potencial de enfermedades infecciosas reemergentes en Colombia. Revisión de la literatura

Revista de la Facultad de Medicina, 2020
Introducción. La infestación por piojos de la cabeza en humanos (Pediculus humanus capitis) se conoce como pediculosis capitis. Estos parásitos pueden ser vectores de enfermedades infecciosas con potencial reemergente. Objetivos.
David López-Valencia, Ángela Patricia Medina-Ortega, Diego Fernando Hoyos-Samboní, Carolina Salguero, Luis Reinel Vásquez-Arteaga   +4 more
doaj   +1 more source

AVIDITY OF IGG TO RICKETTSIA PROWAZEKII AS AN ADDITIONAL CRITERION FOR THE SEROLOGICAL DIFFERENTIAL DIAGNOSIS OF THE EPIDEMIC TYPH AND ITS RECRUDESCENT FORM - BRILL-ZINSSER DISEASE

Журнал микробиологии, эпидемиологии и иммунобиологии, 2018
Aim: to investigate the diagnostic significance of avidity index (AI) for IgG toR. prowazekii with the determination of specific G and M class antibodies. Materials and methods. IgG/IgM to R.
T. A. Chekanova, S. N. Shpynov, I. V. Tarasevich   +2 more
doaj   +1 more source

Risk1, a Phosphatidylinositol 3-Kinase Effector, Promotes Rickettsia typhi Intracellular Survival

mBio, 2020
To establish a habitable intracellular niche, various pathogenic bacteria secrete effectors that target intracellular trafficking and modulate phosphoinositide (PI) metabolism.
Oliver H. Voss, Joseph J. Gillespie, Stephanie S. Lehman, Sherri A. Rennoll, Magda Beier-Sexton, M. Sayeedur Rahman, Abdu F. Azad   +6 more
doaj   +1 more source

Potential role of head lice, Pediculus humanus capitis, as vectors of Rickettsia prowazekii

, 2003
Since the pioneering work of Charles Nicolle in 1909 [see Gross (1996) Proc Natl Acad Sci USA 93:10539-10540] most medical officers and scientists have assumed that body lice are the sole vectors of Rickettsia prowazekii, the aetiological agent of louse ...
Leo, N., Barker, S. C., Prociv, P., Robinson, D.   +3 more
core   +1 more source

Transcriptional regulation in the obligate intracytoplasmic bacterium Rickettsia prowazekii [PDF]

Journal of Bacteriology, 1996
Transcriptional regulation was demonstrated in Rickettsia prowazekii, an obligate intracytoplasmic bacterium. The level of citrate synthase (gltA) mRNA II, from promoter P2, was greater in the total RNA isolated from heavily infected L929 cells than in moderately infected L929 cells; conversely, the level of ATP/ADP translocase (tlc) mRNA was greater ...
J, Cai, H H, Winkler
openaire   +2 more sources

Nucleotide sequence of the Rickettsia prowazekii citrate synthase gene [PDF]

Journal of Bacteriology, 1987
The Rickettsia prowazekii citrate synthase (gltA) gene, previously cloned in Escherichia coli, was localized to a 2.0-kilobase chromosomal fragment. DNA sequence analysis of a portion of this fragment revealed an open reading frame of 1,308 base pairs that encodes a protein of 435 amino acids with a molecular weight of 49,171.
D O, Wood, L R, Williamson, H H, Winkler, D C, Krause   +3 more
openaire   +2 more sources

A proof of concept for a targeted enrichment approach to the simultaneous detection and characterization of rickettsial pathogens from clinical specimens

Frontiers in Microbiology
Infection with either Rickettsia prowazekii or Orientia tsutsugamushi is common, yet diagnostic capabilities are limited due to the short window for positive identification. Until now, although targeted enrichment had been applied to increase sensitivity
Adrian C. Paskey, Adrian C. Paskey, Kevin L. Schully, Logan J. Voegtly, Logan J. Voegtly, Catherine E. Arnold, Catherine E. Arnold, Regina Z. Cer, Kenneth G. Frey, Paul W. Blair, Paul W. Blair, Danielle V. Clark, Danielle V. Clark, Hong Ge, Allen L. Richards, Christina M. Farris, Kimberly A. Bishop-Lilly   +16 more
doaj   +1 more source