Results 1 to 10 of about 4,015 (217)

Experimental Infection of Amblyomma aureolatum Ticks with Rickettsia rickettsii [PDF]

Emerging Infectious Diseases, 2011
We experimentally infected Amblyomma aureolatum ticks with the bacterium Rickettsia rickettsii, the etiologic agent of Rocky Mountain spotted fever (RMSF). These ticks are a vector for RMSF in Brazil. R.
Marcelo B. Labruna, Maria Ogrzewalska, João F. Soares, Thiago F. Martins, Herbert S. Soares, Jonas Moraes-Filho, Fernanda A. Nieri-Bastos, Aliny P. Almeida, Adriano Pinter   +8 more
doaj   +4 more sources

Identification of novel surface-exposed proteins of Rickettsia rickettsii by affinity purification and proteomics. [PDF]

PLoS ONE, 2014
Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever, is the most pathogenic member among Rickettsia spp. Surface-exposed proteins (SEPs) of R. rickettsii may play important roles in its pathogenesis or immunity.
Wenping Gong, Xiaolu Xiong, Yong Qi, Jun Jiao, Changsong Duan, Bohai Wen   +5 more
doaj   +3 more sources

Atypical fulminant Rickettsia rickettsii infection (Brazilian spotted fever) presenting as septic shock and Adult Respiratory Distress Syndrome

Brazilian Journal of Infectious Diseases, 2002
Brazilian spotted fever, caused by Rickettsia rickettsii, has been increasingly reported in Brazil especially in the southeastern states. The severe and fulminant forms of the disease are not unusual but most of the reported fatal cases have shown some ...
Costa Paulo Sérgio Gonçalves da, Brigatte Marcos Emilio, Almeida Edmilton Pereira de, Valle Lena Márcia de Carvalho   +3 more
doaj   +2 more sources

Autophagy facilitates intracellular survival of pathogenic rickettsiae in macrophages via evasion of autophagosomal maturation and reduction of microbicidal pro-inflammatory IL-1 cytokine responses

Microbiology Spectrum, 2023
The genus Rickettsia is comprised of obligate intracellular bacterial parasites of a wide range of arthropod and vertebrate hosts. Some Rickettsia species (spp.) are responsible for serious human diseases globally.
Oliver H. Voss, Hodalis Gaytan, Saif Ullah, Mohammad Sadik, Imran Moin, M. Sayeedur Rahman, Abdu F. Azad   +6 more
doaj   +1 more source

Significant Growth by Rickettsia Species within Human Macrophage-Like Cells Is a Phenotype Correlated with the Ability to Cause Disease in Mammals

Pathogens, 2021
Rickettsia are significant sources of tick-borne diseases in humans worldwide. In North America, two species in the spotted fever group of Rickettsia have been conclusively associated with disease of humans: Rickettsia rickettsii, the causative agent of ...
M. Nathan Kristof, Paige E. Allen, Lane D. Yutzy, Brandon Thibodaux, Christopher D. Paddock, Juan J. Martinez   +5 more
doaj   +1 more source

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