Results 51 to 60 of about 5,954 (213)

Comparative ultrastructural study on the cell envelopes of Rickettsia prowazekii, Rickettsia rickettsii, and Rickettsia tsutsugamushi [PDF]

open access: yesInfection and Immunity, 1978
Rickettsia tsutsugamushi differs from other rickettsiae in its cell envelope organization. The differences were made evident through a comparative study of the outer envelope of R. tsutsugamushi, R. prowazekii, and R. rickettsii by electron microscopy.
D J, Silverman, C L, Wisseman
openaire   +2 more sources

Development of a duplex real-time PCR for the detection of Rickettsia spp. and typhus group rickettsia in clinical samples. [PDF]

open access: yes, 2011
Molecular diagnosis using real-time polymerase chain reaction (PCR) may allow earlier diagnosis of rickettsiosis. We developed a duplex real-time PCR that amplifies (1) DNA of any rickettsial species and (2) DNA of both typhus group rickettsia, that is ...
Cometta, A.   +4 more
core   +1 more source

Cluster of Sylvatic Epidemic Typhus Cases Associated with Flying Squirrels, 2004–2006

open access: yesEmerging Infectious Diseases, 2009
In February 2006, a diagnosis of sylvatic epidemic typhus in a counselor at a wilderness camp in Pennsylvania prompted a retrospective investigation. From January 2004 through January 2006, 3 more cases were identified.
Alice S. Chapman   +13 more
doaj   +1 more source

Head lice as vectors of pathogenic microorganisms

open access: yesTropical Medicine and Health, 2023
Body lice and head lice are the most common ectoparasites of humans. Head lice (Pediculus humanus capitis) occur worldwide in children and their caretakers, irrespective of their social status.
Hermann Feldmeier
doaj   +1 more source

Genotypic identification of an undescribed spotted fever group rickettsia in ixodes ricinus from southwestern Spain [PDF]

open access: yes, 1998
An undescribed rickettsia was directly analyzed with specific rickettsial molecular biology tools on Ixodes ricinus L. collected in different localities of the province of Cadiz (southwestern Spain).
Borobio, M. V.   +5 more
core   +1 more source

Distribution of different Rickettsia species in countries of the WHO Eastern Mediterranean (WHO-EMRO) region: An overview

open access: yesTravel Medicine and Infectious Disease
Subject: Rickettsia is a zoonotic bacterial pathogen transmitted by vectors and has extensive reservoirs in animal and human populations. Rickettsiosis is a public health problem all over the world.
Shahin Seidi   +2 more
doaj   +1 more source

Rickettsia typhi as Cause of Fatal Encephalitic Typhus in Hospitalized Patients, Hamburg, Germany, 1940–1944

open access: yesEmerging Infectious Diseases, 2018
We evaluated formalin-fixed paraffin-embedded tissue specimens from 7 patients who died with encephalitic typhus in Hamburg, Germany, during World War II.
Jessica Rauch   +3 more
doaj   +1 more source

Protein and RNA synthesis by isolated Rickettsia prowazekii [PDF]

open access: yesInfection and Immunity, 1987
Purified host-cell-free Rickettsia prowazekii synthesized protein from leucine, lysine, or proline as radioactive precursor. Most, if not all, of the rickettsial proteins were synthesized. The specific activities of the newly synthesized proteins in the cytoplasmic fraction and in the envelope fraction were not significantly different, indicating that ...
openaire   +2 more sources

Signature proteins that are distinctive of alpha proteobacteria [PDF]

open access: yes, 2005
Background The alpha (α) proteobacteria, a very large and diverse group, are presently characterized solely on the basis of 16S rRNA trees, with no known molecular characteristic that is unique to this group.
Gupta Radhey S, Kainth Pinay
core   +1 more source

Drug Design and Delivery for Intracellular Bacteria: Emerging Paradigms

open access: yesDrug Development Research, Volume 86, Issue 8, December 2025.
ABSTRACT Intracellular bacteria exploit host cell niches, such as lysosomes, phagosomes, cytosol, entire cells, and even erythrocytes, to evade immune clearance and escape conventional antibiotics. These environments pose numerous therapeutic challenges, including crossing host cell membranes, navigating endosomal trafficking, tolerating acidic and ...
Babatunde Ibrahim Olowu   +5 more
wiley   +1 more source

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