Experimental infection of dogs with a Brazilian strain of Rickettsia rickettsii: clinical and laboratory findings [PDF]
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 +6 more
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Microbiology SpectrumRickettsia rickettsii (R. rickettsii), the causative agent of Rocky Mountain spotted fever (RMSF), is the most pathogenic member among Rickettsia spp.
Ruxi Cheng +10 more
doaj +3 more sources
Genome sequence of the endosymbiont Rickettsia peacockii and comparison with virulent Rickettsia rickettsii: identification of virulence factors. [PDF]
PLoS ONE, 2009 Rickettsia peacockii, also known as the East Side Agent, is a non-pathogenic obligate intracellular bacterium found as an endosymbiont in Dermacentor andersoni ticks in the western USA and Canada.
Roderick F Felsheim +2 more
doaj +13 more sources
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 [PDF]
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 +8 more
doaj +4 more sources
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 [PDF]
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 +7 more
doaj +4 more sources
External layers of Rickettsia prowazekii and Rickettsia rickettsii: occurrence of a slime layer [PDF]
Infection and Immunity, 1978 Using a simple specific-antibody stabilization procedure on organisms gently liberated from their host cells, we have demonstrated by electron microscopy that Rickettsia prowazekii and Rickettsia rickettsii possess a coat of variable thickness, external to the outer leaflet of the cell wall and the structure designated by others as a "microcapsule ...
D J Silverman +3 more
openalex +5 more sources
Nitric Oxide Inhibition of Rickettsia rickettsii
Infection and Immunity, 2021 Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever, is an enzootic, obligate, intracellular bacterial pathogen. Nitric oxide (NO) synthesized by the inducible NO synthase (iNOS) is a potent antimicrobial component of innate ...
Liam F. Fitzsimmons +2 more
semanticscholar +4 more sources
Selective fragmentation of the trans-Golgi apparatus by Rickettsia rickettsii
PLOS Pathogens, 2020 Fragmentation of the Golgi apparatus is observed during a number of physiological processes including mitosis and apoptosis, but also occurs in pathological states such as neurodegenerative diseases and some infectious diseases.
Karin Aistleitner +3 more
semanticscholar +6 more sources
Effect of immunosuppression on Rickettsia rickettsii infection in guinea pigs [PDF]
Infection and Immunity, 1978 The role of the immune response in the pathogenesis of Rickettsia rickettsii infection in guinea pigs was investigated by immunosuppression, using antilymphocyte serum. Twenty guinea pigs were inoculated with R. rickettsii, Sheila Smith strain, on day 0. Fifteen animals received antilymphocyte serum on days --1, 0, 2, 4, and 6.
David H. Walker, Frederick W. Henderson
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PLoS Pathogens, 2023 Members of the spotted fever group rickettsia express four large, surface-exposed autotransporters, at least one of which is a known virulence determinant.
Adam M. Nock +10 more
openalex +3 more sources