Results 11 to 20 of about 4,543 (198)

Experimental infection of horses with Rickettsia rickettsii. [PDF]

Parasit Vectors, 2016
Rickettsia rickettsii is vectored by ticks, and some vertebrate hosts can be sources of infection to ticks during bacteremic periods. In Brazil, the main vector for R. rickettsii is the tick Amblyomma sculptum, a member of the A. cajennense complex. Horses, in turn, are one of the major hosts for A. sculptum.
Ueno TE, Costa FB, Moraes-Filho J, Agostinho WC, Fernandes WR, Labruna MB.   +5 more
europepmc   +5 more sources

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, João Luis H Faccini, Adriano Pinter, Tais B Saito, Richard C Pacheco, Mitika K Hagiwara, Marcelo B Labruna   +6 more
doaj   +2 more sources

Seroepidemiological survey to investigate Rickettsia rickettsii and Rickettsia parkeri in municipalities of the southeast Brazil. [PDF]

Rev Inst Med Trop Sao Paulo
ABSTRACT Spotted fever is a tick-borne rickettsiosis caused by several Rickettsia species—including R. rickettsii, R. parkeri, and others—with varying degrees of pathogenicity. Its nonspecific symptoms often lead to misdiagnosis such as dengue. This study investigated anti-R. rickettsii and R.
Franco MB, Fonseca GC, Sousa ACP, Rostkwoska C, Pajuaba ACAM, Mineo JR, Szabó MPJ, Oliveira SV.   +7 more
europepmc   +6 more sources

Fatal Human Infection with Rickettsia rickettsii, Yucatán, Mexico

Emerging Infectious Diseases, 2006
The first fatal Rickettsia rickettsii infection was diagnosed in the southwest of Mexico. The patient had fever, erythematous rash, abdominal pain, and severe central nervous system involvement with convulsive crisis. The diagnosis of R.
Jorge E. Zavala-Castro, Jorge E. Zavala-Velázquez, David H. Walker, Edgar E. Ruiz Arcila, Hugo Laviada-Molina, Juan P. Olano, José A. Ruiz-Sosa, Melissa A. Small, Karla R. Dzul-Rosado   +8 more
doaj   +2 more sources

Transformation Frequency of a mariner-Based Transposon in Rickettsia rickettsii [PDF]

Journal of Bacteriology, 2011
ABSTRACTTransformation frequencies of amariner-based transposon system inRickettsia rickettsiiwere determined using a plaque assay system for enumeration and isolation of mutants. Sequence analysis of insertion sites in bothR. rickettsiiandR. prowazekiiindicated that insertions were random.
Tina R, Clark, Amanda M, Lackey, Betsy, Kleba, Lonnie O, Driskell, Erika I, Lutter, Craig, Martens, David O, Wood, Ted, Hackstadt   +7 more
openaire   +3 more sources

Rickettsia rickettsii isolation from naturally infected Amblyomma parvum ticks by centrifugation in a 24-well culture plate technique [PDF]

Open Veterinary Journal, 2013
Rocky Mountain spotted fever is an acute illness caused by Rickettsia rickettsii (R. rickettsii) and is transmitted by the bite of ticks of the genera Dermacentor, Amblyomma and Rhipicephalus.
K. Dzul-Rosado, G. Peniche-Lara, R. Tello-Martín, J. Zavala-Velázquez, R. de Campos Pacheco, M.B. Labruna, E.C. Sánchez, J. Zavala-Castro   +7 more
doaj   +4 more sources

Production and characterization of monoclonal antibodies to Rickettsia rickettsii [PDF]

Infection and Immunity, 1984
Five mouse ascitic fluids (MAFs) containing monoclonal antibody to Rickettsia rickettsii were produced from three original fusions by murine hybridoma technology. The five MAFs were fractionated and purified; each contained monoclonal antibody of the immunoglobulin G2a subclass.
J V, Lange, D H, Walker
openaire   +4 more sources

Selective fragmentation of the trans-Golgi apparatus by Rickettsia rickettsii. [PDF]

PLoS Pathog, 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. Here we show that highly virulent strains of Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever ...
Aistleitner K, Clark T, Dooley C, Hackstadt T.   +3 more
europepmc   +6 more sources

A ocorrência de riquetsioses do grupo Rickettsia rickettsii Occurrence of rickettsiosis of the group Rickettsia rickettsii

Revista de Saúde Pública, 1983
Foi realizada revisão da literatura com objetivo de atualizar as informações sobre a ocorrência de riquetsioses do grupo Rickettsia rickettsii. Verificou-se que nos EUA e Europa, a incidência da febre maculosa, vem aumentando desde 1970 até hoje. No Brasil, foi relatado um caso presuntivo, no estado da Bahia, em 1979.
Dalva A. Portari Mancini, Elvira M. Mendes Nascimento, Valéria Rosa Tavares, Murillo Adelino Soares   +3 more
openaire   +3 more sources

Infección por rickettsia en capibaras (Hydrochoerus hydrochaeris) de São Paulo, Brasil: evidencia serológica de infección por Rickettsia bellii y Rickettsia parkeri

Biomédica: revista del Instituto Nacional de Salud, 2007
Introducción. En Brasil, los capibaras (Hydrochoerus hydrochaeris) son importantes huéspedes para garrapatas del género Amblyomma, las cuales transmiten rickettsiosis a humanos y animales.
Richard C. Pacheco, Mauricio C. Horta, Jonas Moraes-Filho, Alexandre C. Ataliba, Adriano Pinter, Marcelo B. Labruna   +5 more
doaj   +3 more sources