Results 31 to 40 of about 3,644 (172)

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

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

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

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  

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

Eco‐Epidemiological Study of Seropositivity Against Rickettsia and Leptospira Agents in Rural Areas of Urabá, Colombia

Tropical Medicine &International Health, EarlyView.
ABSTRACT Introduction Rickettsioses and leptospirosis are infectious diseases often underdiagnosed due to limited knowledge about their epidemiology, pathophysiology, and clinical aspects. Objectives To characterize the seroprevalence and seroincidence of Rickettsia and Leptospira agents and determine their associated factors in rural areas of Urabá ...
Mariana Torres‐Bustamante, Omar Cantillo‐Barraza, Albert I. Ko, Elsio A. Wunder Jr, Juan C. Quintero‐Vélez   +4 more
wiley   +1 more source

Reactivity of monoclonal antibodies to Rickettsia rickettsii with spotted fever and typhus group rickettsiae [PDF]

Journal of Clinical Microbiology, 1987
Analysis of 15 spotted fever group (SFG) and 2 typhus group strains of rickettsiae with a panel of monoclonal antibodies revealed a number of shared and unique epitopes of the 120- and 155-kilodalton surface proteins. All of the SFG strains but neither of the typhus group strains reacted with antibody to the lipopolysaccharidelike antigen of Rickettsia
R L, Anacker, R E, Mann, C, Gonzales
openaire   +2 more sources