Results 31 to 40 of about 1,338 (118)

Comparative growth of spotted fever group Rickettsia spp. strains in Vero cells

Memorias do Instituto Oswaldo Cruz, 2016
In Brazil, the spotted fever group (SFG) Rickettsia rickettsii and Rickettsia parkeri related species are the etiological agents of spotted fever rickettsiosis. However, the SFG, Rickettsia rhipicephali, that infects humans, has never been reported.
Arannadia Barbosa Silva, Myrian Morato Duarte, Vinicius Figueiredo Vizzoni, Ana Íris de Lima Duré, Diego Montenegro Lopéz, Rita de Maria Seabra Nogueira, Carlos Augusto Gomes Soares, Erik Machado-Ferreira, Gilberto Salles Gazêta   +8 more
doaj   +1 more source

Significant Growth by Rickettsia Species within Human Macrophage-Like Cells Is a Phenotype Correlated with the Ability to Cause Disease in Mammals

Pathogens, 2021
Rickettsia are significant sources of tick-borne diseases in humans worldwide. In North America, two species in the spotted fever group of Rickettsia have been conclusively associated with disease of humans: Rickettsia rickettsii, the causative agent of ...
M. Nathan Kristof, Paige E. Allen, Lane D. Yutzy, Brandon Thibodaux, Christopher D. Paddock, Juan J. Martinez   +5 more
doaj   +1 more source

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   +1 more source

Ticks and tick-borne rickettsiae from dogs in El Salvador, with report of the human pathogen Rickettsia parkeri

Ticks and Tick-Borne Diseases, 2023
Twelve tick species have been reported in El Salvador; however, information regarding ticks infesting domestic dogs is lacking, and pathogenic tick-borne Rickettsia species have never been reported in El Salvador.
Luis E. Romero, Lina C. Binder, Arlei Marcili, Marcelo B. Labruna   +3 more
doaj   +1 more source

Gulf Coast Ticks (Amblyomma maculatum) and Rickettsia parkeri, United States

Emerging Infectious Diseases, 2007
Geographic distribution of Rickettsia parkeri in its US tick vector, Amblyomma maculatum, was evaluated by PCR. R. parkeri was detected in ticks from Florida, Georgia, Kentucky, Mississippi, Oklahoma, and South Carolina, which suggests that A.
John W. Sumner, Lance A. Durden, Jerome Goddard, Ellen Y. Stromdahl, Kerry L. Clark, Will K. Reeves, Christopher D. Paddock   +6 more
doaj   +1 more source

Serosurvey of antibodies against spotted fever group Rickettsia spp. in horse farms in Northern Paraná, Brazil Soroprevalência de anticorpos contra Rickettsia spp. do grupo febre maculosa em equinos de haras no Norte do Paraná, Brasil

Revista Brasileira de Parasitologia Veterinária, 2010
Brazilian spotted fever (BSF) is an emerging disease most likely caused by Rickettsia rickettsii. The objective of the present study was to estimate the seroprevalence of BSF rickettsia infections in equines from six horse farms located in Londrina ...
Katia Tamekuni, Roberta dos Santos Toledo, Mauro de Freitas Silva Filho, Valeska Bender Haydu, Richard Campos Pacheco, José Henrique Cavicchioli, Marcelo Bahia Labruna, John Stephen Dumler, Odilon Vidotto   +8 more
doaj   +1 more source

Rickettsia parkeri in Amblyomma maculatum Ticks, North Carolina, USA, 2009–2010

Emerging Infectious Diseases, 2011
We detected Rickettsia parkeri in 20%−33% of Amblyomma maculatum ticks sampled in North Carolina. Results highlight the high frequencies of R. parkeri–infected ticks in the state with the highest annual incidence of Rocky Mountain spotted fever ...
Andrea S. Varela-Stokes, Christopher D. Paddock, Barry Engber, Marcee Toliver   +3 more
doaj   +1 more source

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

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

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