Results 1 to 10 of about 1,301 (121)

Phylogenetic Differentiation of Rickettsia parkeri Reveals Broad Dispersal and Distinct Clustering within North American Strains [PDF]

Microbiology Spectrum, 2021
The tick-borne pathogen Rickettsia parkeri causes a mild rickettsiosis, with cases reported from several countries to its known distribution in the Americas. Molecular analyses have identified a clear distinction between strains of R.
Michelle E J Allerdice, Christopher D Paddock, Joy A Hecht   +2 more
exaly   +4 more sources

DRP1/DMNL-1-mediated mitochondrial fission augments Rickettsia parkeri replication in macrophages [PDF]

Infection and Immunity
Pathogenic Spotted Fever Group (SFG) Rickettsia species, including Rickettsia parkeri, replicate in endothelial cells and macrophages in vitro and during infections in murine models of disease.
Elliott Collins, Natasha Kelly, Heather Green, William Beavers, Basel Abuaita, Juan J. Martinez   +5 more
doaj   +2 more sources

Rickettsia parkeri Rickettsiosis Resembling Sweet Syndrome: A Differential Diagnosis for Critical Discussion [PDF]

Infectious Disease Reports
Introduction: Spotted fever group (SFG) rickettsioses are tick-transmitted infections caused by Gram-negative, obligately intracellular bacteria in the genus Rickettsia.
Lucas S. Blanton, Sarah E. Muir, Nicole L. Mendell, David H. Walker   +3 more
doaj   +2 more sources

Rickettsia parkeri with a Genetically Disrupted Phage Integrase Gene Exhibits Attenuated Virulence and Induces Protective Immunity against Fatal Rickettsioses in Mice [PDF]

Pathogens, 2021
Although rickettsiae can cause life-threatening infections in humans worldwide, no licensed vaccine is currently available. To evaluate the suitability of live-attenuated vaccine candidates against rickettsioses, we generated a Rickettsia parkeri mutant ...
Esteban Arroyave, Ilirjana Hyseni, Nicole Burkhardt, Yong-Fang Kuo, Tian Wang, Ulrike Munderloh, Rong Fang   +6 more
doaj   +2 more sources

Eco-epidemiological analysis of Rickettsia parkeri in domestic dogs and Amblyomma ovale ticks in the Atlantic rainforest of Northeast Brazil [PDF]

Revista Brasileira de Parasitologia Veterinária
In Brazil, spotted fever (SF) is caused by two species of Rickettsia, both of which are transmitted by Amblyomma ticks: Rickettsia rickettsii, which results in severe and often fatal cases, and Rickettsia parkeri, which causes a mild illness.
Michellin Pereira de Albuquerque, Mauricio Claudio Horta, Daniele Rosa Xavier de Melo, Gabriela Akemi Cardoso Gagliardi Takeda, Ana Isabel Arraes-Santos, Thiago Fernandes Martins, Adriano Pinter   +6 more
doaj   +2 more sources

Establishment of Amblyomma maculatum Ticks and Rickettsia parkeri the Northeastern United States [PDF]

Emerging Infectious Diseases
We document a case of Rickettsia parkeri rickettsiosis in a patient in Connecticut, USA, who became ill after a bite from a Gulf Coast tick (Amblyomma maculatum). We used PCR to amplify R. parkeri DNA from the detached tick.
Goudarz Molaei, Noelle Khalil, Carmen J. Ramos, Christopher D. Paddock   +3 more
doaj   +2 more sources

Rickettsia parkeri infection modulates the sialome and ovariome of the Gulf coast tick, Amblyomma maculatum [PDF]

Frontiers in Microbiology, 2022
The Gulf Coast tick, Amblyomma maculatum, is a vector of several tick-borne pathogens, including Rickettsia parkeri. The ability of R. parkeri to persist within the tick population through transovarial and transstadial transmission, without apparently ...
Melina Garcia Guizzo, Khemraj Budachetri, Abdulsalam Adegoke, Jose M. C. Ribeiro, Shahid Karim   +4 more
doaj   +2 more sources

A new focus of spotted fever caused by Rickettsia parkeri in Brazil [PDF]

Revista do Instituto de Medicina Tropical de São Paulo, 2022
Spotted fever (SF) is a tick-borne zoonosis caused by bacteria of the genus Rickettsia . The disease varies in severity from mild clinical forms to severe cases.
Nicole Oliveira de Moura Martiniano, Tayra Pereira Sato, Vinicius Figueiredo Vizzoni, Sheila de Figueiredo Ventura, Stefan Vilges de Oliveira, Marinete Amorim, Gilberto Salles Gazêta   +6 more
doaj   +2 more sources

Rickettsia parkeri and Candidatus Rickettsia andeanae in Amblyomma maculatum Group Ticks [PDF]

Emerging Infectious Diseases, 2020
We determined prevalence of Rickettsia spp. in 172 ticks of the Amblyomma maculatum group collected from 16 urban sites in Oklahoma City, Oklahoma, USA, during 2017 and 2018.
Bruce H. Noden, Megan A. Roselli, Scott R. Loss   +2 more
doaj   +2 more sources

‘Candidatus Rickettsia andeanae’ and Probable Exclusion of Rickettsia parkeri in Ticks from Dogs in a Natural Area of the Pampa Biome in Brazil [PDF]

Pathogens, 2023
Spotted fever illness caused by the tick-borne pathogen Rickettsia parkeri has emerged in the Pampa biome in southern Brazil, where the tick Amblyomma tigrinum is implicated as the main vector.
Felipe S. Krawczak, Lina C. Binder, Fábio Gregori, Thiago F. Martins, Gracielle T. Pádua, Jonas Sponchiado, Geruza L. Melo, Gina Polo, Marcelo B. Labruna   +8 more
doaj   +2 more sources