Results 21 to 30 of about 4,003 (214)

Hosts mobility and spatial spread of Rickettsia rickettsii. [PDF]

PLoS Comput Biol, 2018
There are a huge number of pathogens with multi-component transmission cycles, involving amplifier hosts, vectors or complex pathogen life cycles. These complex systems present challenges in terms of modeling and policy development. A lethal tick-borne infectious disease, the Brazilian Spotted Fever (BSF), is a relevant example of that.
Polo G, Mera Acosta C, Labruna MB, Ferreira F, Brockmann D.   +4 more
europepmc   +7 more sources

Detection of fibrils associated with Rickettsia rickettsii [PDF]

Infection and Immunity, 1983
The ultrastructural appearance of the "halozone" formed at the interface between the spotted fever agent Rickettsia rickettsii and the cytoplasm of persistently infected cultured vole cells (Microtus pennsylvanicus) was studied by transmission electron microscopy. In sections of epoxy-embedded specimens stained with uranyl acetate and lead citrate, the
W J, Todd, W, Burgdorfer, G P, Wray
openaire   +2 more sources

Long term neurologic sequelae in a Mexican rocky mountain spotted fever case

Brazilian Journal of Infectious Diseases, 2019
During the second half of the twentieth century, neurologic sequelae associated with central nervous system impairment caused by Rickettsia rickettsii were studied widely and exclusively in the United States.
Karla Rossanet Dzul-Rosado, Cesar Lugo-Caballero, Alejandra Salcedo-Parra, Raymundo Daniel López-Soto, Álvaro A. Faccini-Martínez   +4 more
doaj   +1 more source

Comparative growth of spotted fever group Rickettsia spp. strains in Vero cells

Memorias do Instituto Oswaldo Cruz, 2016
In Brazil, the spotted fever group (SFG) Rickettsia rickettsii and Rickettsia parkeri related species are the etiological agents of spotted fever rickettsiosis. However, the SFG, Rickettsia rhipicephali, that infects humans, has never been reported.
Arannadia Barbosa Silva, Myrian Morato Duarte, Vinicius Figueiredo Vizzoni, Ana Íris de Lima Duré, Diego Montenegro Lopéz, Rita de Maria Seabra Nogueira, Carlos Augusto Gomes Soares, Erik Machado-Ferreira, Gilberto Salles Gazêta   +8 more
doaj   +1 more source

Serosurvey on rickettsiae of the spotted fever group and Rickettsia bellii among dogs in the state of Goiás, Brazil

Revista Brasileira de Parasitologia Veterinária, 2020
The purpose of this study was to do a serological survey on three rickettsial species: Rickettsia rickettsii and Rickettsia parkeri, two species of the spotted fever group (SFG) that are considered to be great importance for public health; and Rickettsia
Lucianne Cardoso Neves, Ana Laura Gonçalves Barreto, Mariana Xavier de Souza, Danieli Brolo Martins, Amália Regina Mar Barbieri, Maria Carolina de Azevedo Serpa, Sebastián Muñoz-Leal, Marcelo Bahia Labruna, Felipe da Silva Krawczak   +8 more
doaj   +1 more source

Experimental infection of dogs with a Brazilian strain of Rickettsia rickettsii: clinical and laboratory findings

Memorias do Instituto Oswaldo Cruz, 2008
The bacterium Rickettsia rickettsii is the etiological agent of an acute, severe disease called Rocky Mountain spotted fever in the United States or Brazilian spotted fever (BSF) in Brazil.
Eliane M Piranda, João Luis H Faccini, Adriano Pinter, Tais B Saito, Richard C Pacheco, Mitika K Hagiwara, Marcelo B Labruna   +6 more
doaj   +1 more source

Serosurvey of antibodies against spotted fever group Rickettsia spp. in horse farms in Northern Paraná, Brazil Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil

Revista Brasileira de Parasitologia Veterinária, 2010
Brazilian spotted fever (BSF) is an emerging disease most likely caused by Rickettsia rickettsii. The objective of the present study was to estimate the seroprevalence of BSF rickettsia infections in equines from six horse farms located in Londrina ...
Katia Tamekuni, Roberta dos Santos Toledo, Mauro de Freitas Silva Filho, Valeska Bender Haydu, Richard Campos Pacheco, José Henrique Cavicchioli, Marcelo Bahia Labruna, John Stephen Dumler, Odilon Vidotto   +8 more
doaj   +1 more source

Genetic sequencing of a 1944 Rocky Mountain spotted fever vaccine

Scientific Reports, 2023
Rocky Mountain spotted fever (RMSF) is a rapidly progressive and often fatal tick-borne disease caused by Rickettsia rickettsii. Its discovery and characterization by Howard Ricketts has been hailed as a remarkable historical example of detection and ...
Yongli Xiao, Paul A. Beare, Sonja M. Best, David M. Morens, Marshall E. Bloom, Jeffery K. Taubenberger   +5 more
doaj   +1 more source

Seroprevalence of Rickettsia bellii and Rickettsia felis in dogs, São José dos Pinhais, State of Paraná, Brazil Soroprevalência de Rickettsia bellii e Rickettsia felis em cães, São José dos Pinhais, Paraná, Brasil

Revista Brasileira de Parasitologia Veterinária, 2010
Brazilian spotted fever (BSF) is a vector-borne zoonosis caused by Rickettsia rickettsii bacteria. Dogs can be host sentinels for this bacterium. The aim of the study was to determine the presence of antibodies against Rickettsia spp.
Fernanda Silva Fortes, Iara Silveira, Jonas Moraes-Filho, Ronaldo Viana Leite, José Edivaldo Bonacim, Alexander Welker Biondo, Marcelo Bahia Labruna, Marcelo Beltrão Molento   +7 more
doaj   +1 more source

Detecção de anticorpos anti-Rickettsia rickettsii em cães residentes em área negligenciada no município de São Paulo, SP, Brasil [PDF]

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2020
RESUMO A febre maculosa brasileira (FMB), descrita inicialmente nos Estados Unidos como febre maculosa das Montanhas Rochosas, é uma antropozoonose relatada apenas no continente americano e causada pela bactéria Rickettsia rickettsii.
Z.Ê.S. Souza, B.V. Moraes, F.S. Krawczak, L. Zulzke, T.V. Carvalho, A.O. Sousa, R.G. Agopian, A. Marcili, M.B. Labruna, J. Moraes-Filho   +9 more
doaj   +1 more source