Results 21 to 30 of about 4,543 (198)

Frequency of antibodies class IgG anti-Rickettsia rickettsii in horses of Universidade Federal Rural do Rio de Janeiro, Seropédica campus

Brazilian Journal of Veterinary Medicine, 2015
. Cordeiro M.D., Raia V.A., Valim J.R.A., Castro G.N.S., Souza C.E. & Fonseca A.H. [Frequency of antibodies class IgG anti-Rickettsia rickettsii in horses of Universidade Federal Rural do Rio de Janeiro, Seropédica campus.] Frequência de anticorpos da ...
Matheus Dias Cordeiro, Vanessa de Almeida Raia, Jaqueline Rodrigues de Almeida Valim, Gustavo Nunes de Santana Castro, Celso Eduardo de Souza, Adivaldo Henrique da Fonseca   +5 more
doaj   +1 more source

Seroprevalence of Rickettsia rickettsii and Rickettsia parkeri in dogs during a Brazilian Spotted Fever outbreak in the State of Rio de Janeiro

Arquivo Brasileiro de Medicina Veterinária e Zootecnia
The present paper is the first to perform this evaluation in dogs from the cities of Natividade, Porciuncula and Varre-Sai. The aim of this study is to search for Spotted Fever Group Rickettsia in canine sera using indirect immunofluorescence assay and ...
I.T. Poubel, N.C. Cunha, A.B.M. Fonseca, A. Pinter, A.H. Fonseca, M.D. Cordeiro, N.R.P. Almosny   +6 more
doaj   +2 more sources

Nitric Oxide Inhibition of Rickettsia rickettsii. [PDF]

Infect Immun, 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 immunity and has been implicated in the control of virulent ...
Fitzsimmons LF, Clark TR, Hackstadt T.
europepmc   +3 more sources

Fiebre Manchada por Rickettsia Rickettsii

, 2019
Las Rickettsias son entidades clínicas emergentes y reemergentes del tipo zoonótico, de la famillia Rickettsiaceae, son un género de bacterias intracelulares obligadas transmitidas por diferentes vectores artrópodos hematófagos como garrapatas, pulgas, piojos y ácaros. Estos vectores condicionan el establecimiento y la epidemiología de la enfermedad en
Leon de la Fuente, Ricardo Alfonso, Herrera, Mauricio, Sánchez, Alejandra P.   +2 more
openaire   +2 more sources

Identification of an autotransporter peptidase of Rickettsia rickettsii responsible for maturation of surface exposed autotransporters. [PDF]

PLoS Pathog, 2023
Members of the spotted fever group rickettsia express four large, surface-exposed autotransporters, at least one of which is a known virulence determinant.
Nock AM, Aistleitner K, Clark TR, Sturdevant D, Ricklefs S, Virtaneva K, Zhang Y, Gulzar N, Redekar N, Roy A, Hackstadt T.   +10 more
europepmc   +2 more sources

Absorption of Rickettsia rickettsii antibodies by Rickettsia rickettsii antigens in four diagnostic tests [PDF]

Journal of Clinical Microbiology, 1983
Immunoabsorption profiles were determined for Rickettsia rickettsii antigens used in four confirmatory tests for detection of antibodies to Rocky Mountain spotted fever. A human serum reactive in the four tests was absorbed with each test antigen and then reexamined by all four tests.
K E, Hechemy, R L, Anacker, N L, Carlo, J A, Fox, H A, Gaafar   +4 more
openaire   +2 more sources

Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks. [PDF]

Emerg Infect Dis, 2018
Amblyomma aureolatum ticks are vectors of Rickettsia rickettsii, the etiologic agent of Rocky Mountain spotted fever in Brazil. Maintenance of R. rickettsii in nature depends on horizontal transmission along tick generations.
Moraes-Filho J, Costa FB, Gerardi M, Soares HS, Labruna MB.   +4 more
europepmc   +2 more sources

Laboratory Maintenance of Rickettsia rickettsii [PDF]

Current Protocols in Microbiology, 2008
AbstractThis unit includes protocols for the laboratory maintenance of the obligate intracellular bacterium Rickettsia rickettsii, including propagation in mammalian cell cultures, as well as isolation, counting, and storage procedures. Regulations for working with R. rickettsii in biosafety level 3 containment are also discussed. Curr.
Nicole C, Ammerman, Magda, Beier-Sexton, Abdu F, Azad   +2 more
openaire   +2 more sources

Rickettsia rickettsii and Rickettsia typhi in inhabitants from a rural community of southeast Mexico. [PDF]

Rev Peru Med Exp Salud Publica, 2022
Torres-Castro M, Reyes-Novelo E, Noh-Pech H, Sánchez-Montes S, Colunga-Salas P, Lugo-Caballero C, Rodríguez-Vivas RI.   +6 more
europepmc   +3 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