Results 41 to 50 of about 13,960 (198)

Serological evidence of Rickettsia in horses from a semi-arid Brazilian region

Revista Brasileira de Parasitologia Veterinária, 2021
Brazilian spotted fever (BSF) is a common tick-borne disease caused by Rickettsia rickettsii. Horses are the primary hosts of the main vector, Amblyomma sculptum, and are considered efficient sentinels for circulation of Rickettsia. Therefore, the aim of
Ila Ferreira Farias, Eline Almeida Rodrigues de Souza, Maria Carolina de Azevedo Serpa, Flávio Silva Palha, Glauber Meneses Barboza de Oliveira, Marcelo Bahia Labruna, Mauricio Claudio Horta   +6 more
doaj   +1 more source

Comparative ultrastructural study on the cell envelopes of Rickettsia prowazekii, Rickettsia rickettsii, and Rickettsia tsutsugamushi [PDF]

Infection and Immunity, 1978
Rickettsia tsutsugamushi differs from other rickettsiae in its cell envelope organization. The differences were made evident through a comparative study of the outer envelope of R. tsutsugamushi, R. prowazekii, and R. rickettsii by electron microscopy.
D J, Silverman, C L, Wisseman
openaire   +2 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, C L, Wisseman, A D, Waddell, M, Jones   +3 more
openaire   +2 more sources

Rickettsial spotted fever in capoeirão Village, Itabira, Minas Gerais, Brazil Rickettsiose do grupo da febre maculosa na Vila de Capoeirão, Itabira, Minas Gerais, Brasil

Revista do Instituto de Medicina Tropical de São Paulo, 2008
The present study investigated the infection by spotted fever rickettsia in an endemic area for Brazilian spotted fever (BSF; caused by Rickettsia rickettsii) in Minas Gerais State, Brazil.
Manoella Campostrini Barreto Vianna, Maurício Claudio Horta, Luis Antônio Sangioni, Adriana Cortez, Rodrigo Martins Soares, Cláudio Lisias Mafra, Márcio Antônio Moreira Galvão, Marcelo Bahia Labruna, Solange Maria Gennari   +8 more
doaj   +1 more source

Spotted fever group rickettsial infection in dogs and their ticks from domestic–wildlife interface areas in southeastern Brazil

Revista Brasileira de Parasitologia Veterinária, 2020
Rickettsia rickettsii is the causative agent of Brazilian spotted fever (BSF), for which humans and dogs are both susceptible. Dogs are sentinels in serological surveys, however, canine disease is rarely reported.
Sabrina Destri Emmerick Campos, Nathalie Costa da Cunha, Camila de Souza Cerqueira Machado, Niara Vanat Nadal, Eloy Silva Seabra Junior, Erich Loza Telleria, Matheus Dias Cordeiro, Helena Keiko Toma, Nádia Regina Pereira Almosny   +8 more
doaj   +1 more source

Newly Recognized Spotted Fever Group Rickettsia as Cause of Severe Rocky Mountain Spotted Fever–Like Illness, Northern California, USA

Emerging Infectious Diseases
The incidence of spotted fever group (SFG) rickettsioses in the United States has tripled since 2010. Rocky Mountain spotted fever, the most severe SFG rickettsiosis, is caused by Rickettsia rickettsii.
Will S. Probert, Monica P. Haw, Aran C. Nichol, Carol A. Glaser, Sarah Y. Park, Laura E. Campbell, Kavita K. Trivedi, Hannah Romo, Megan E.M. Saunders, Anne M. Kjemtrup, Kerry A. Padgett, Jill K. Hacker   +11 more
doaj   +1 more source

Rickettsia species infecting Amblyomma ticks from an area endemic for Brazilian spotted fever in Brazil Rickettsia infectando carrapatos Amblyomma de uma área endêmica para febre maculosa Brasileira no Brasil

Revista Brasileira de Parasitologia Veterinária, 2011
This study reports rickettsial infection in Amblyomma cajennense and Amblyomma dubitatum ticks collected in an area of the state of Minas Gerais, Brazil, where Brazilian spotted fever is considered endemic. For this purpose, 400 adults of A.
Elizângela Guedes, Romário Cerqueira Leite, Richard Campos Pacheco, Iara Silveira, Marcelo Bahia Labruna   +4 more
doaj   +1 more source

Identification of Lupus Erythematosus Cells and Ragocytes in Peripheral Blood from a Dog with Systemic Lupus Erythematosus

Veterinary Clinical Pathology, EarlyView.
ABSTRACT A 3‐year‐old female‐intact German Shepherd presented for the evaluation of progressive shifting leg lameness, carpal swelling, and weight loss with a poor appetite since adoption about three months prior. Routine blood smear evaluation, lymph node, and synovial fluid cytologies all revealed rare neutrophils with cytoplasmic inclusions ...
Samantha L. Braman, Jeremy P. Bessett, Katie L. Anderson, Kristen R. Friedrichs   +3 more
wiley   +1 more source

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

, 2009
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.
Labruna, Marcelo B, Pinter, Adriano, Saito, Tais B, Pacheco, Richard C, Faccini, João Luis H, Piranda, Eliane M, Hagiwara, Mitika K   +6 more
core   +1 more source

Short Report: First Outbreak of Atlantic Rainforest Spotted Fever in North‐Eastern of Brazil—Clinical Features and Eco‐Epidemiological Investigation

Zoonoses and Public Health, EarlyView.
ABSTRACT Introduction Since 2010, six cases of Atlantic rainforest spotted fever (ARSF) have been confirmed and reported in Brazil, a tick‐borne disease caused by Rickettsia parkeri strain Atlantic rainforest and associated with the tick Amblyomma ovale. So far, none of the cases have been associated with death. One of the cases occurred in 2018 in the
Gabriel Nunes de Oliveira, Ruan Carvalho Passos, Ricardo Siqueira Bovendorp, Matheus Pasini‐Martins, Igor Silva Silito, Thiago Fernandes Martins, George Rego Albuquerque, Maiara Santos Zuchonelli, Carina Santos Pereira, Ana Clara de Carvalho Pereira, Lucas Monteiro Santos de Almeida, Rodrigo Nogueira Angerami, Marcelo Bahia Labruna, Anaiá da Paixão Sevá   +13 more
wiley   +1 more source