Results 31 to 40 of about 4,003 (214)

Rickettsia infection in five areas of the state of São Paulo, Brazil

Memorias do Instituto Oswaldo Cruz, 2007
This study investigated rickettsial infection in animals, humans, ticks, and fleas collected in five areas of the state of São Paulo. Eight flea species (Adoratopsylla antiquorum antiquorum, Ctenocephalides felis felis, Polygenis atopus, Polygenis ...
Maurício C Horta, Marcelo B Labruna, Adriano Pinter, Pedro M Linardi, Teresinha T S Schumaker   +4 more
doaj   +1 more source

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   +1 more source

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

Latex-Rickettsia rickettsii test reactivity in seropositive patients [PDF]

Journal of Clinical Microbiology, 1983
In correlating results obtained from a new latex-Rickettsia rickettsii test with results obtained from a reference microimmunofluorescence test for Rocky Mountain spotted fever, we found that for seropositive patients each microimmunofluorescence titer (up to 4,096) was usually double the median titer obtained from the latex-R. rickettsii test.
K E, Hechemy, B B, Rubin
openaire   +2 more sources

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

Rickettsia rickettsii in Amblyomma patinoi ticks, Colombia. [PDF]

Emerg Infect Dis, 2015
Para el editor: Rickettsia rickettsii es el agente etiológico de la fiebre maculosa de las Montañas Rocosas (RMSF), una rickettsiosis transmitida por garrapatas altamente letal restringida al hemisferio occidental (1,2). En Colombia, R. rickettsii se informó por primera vez durante la década de 1930, cuando 62 (95%) de 65 personas afectadas murieron de
Faccini-Martínez ÁA, Costa FB, Hayama-Ueno TE, Ramírez-Hernández A, Cortés-Vecino JA, Labruna MB, Hidalgo M.   +6 more
europepmc   +5 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

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

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

Human endothelial cell culture plaques induced by Rickettsia rickettsii [PDF]

Infection and Immunity, 1982
Primary cultures of human umbilical vein endothelial cells were inoculated with plaque-purified Rickettsia rickettsii. After adsorption of rickettsiae, monolayers were overlaid with medium containing 0.5% agarose. Small plaques appeared on day 4 postinoculation, and distinct 1- to 2-mm plaques were observed on day 5.
D H, Walker, W T, Firth, C J, Edgell
openaire   +2 more sources