Results 81 to 90 of about 4,543 (198)

Febre maculosa: isolamento de Rickettsia em amostra de biópsia de pele Spotted fever: Rickettsia isolation in skin biopsy sample

Revista do Instituto de Medicina Tropical de São Paulo, 1992
Presença de Rickettsia na pele de doente de Febre Maculosa foi evidenciada por inoculação intraperitoneal em cobaio. O diagnóstico sorológico por imunoflüorescência indireta revelou diferença de título de anticorpos específicos para Rickettsia rickettsii,
Heloisa Helana B. Melles, Silvia Colombo, Marcos Vinícius da Silva   +2 more
doaj   +1 more source

Spatial and temporal analyses of Dermacentor variabilis (Say) (Acari: Ixodidae) in central and eastern Canada

Medical and Veterinary Entomology, Volume 39, Issue 3, Page 515-524, September 2025.
One thousand one hundred ninety‐eight adult Dermacentor variabilis (Say), a species of veterinary and human medical importance, were collected from companion animals in central and eastern Canada. Peaks in adult D. variabilis submissions occurred in May and June across the provinces. Most submissions of adult D.
Grace K. Nichol, J. Scott Weese, Shaun J. Dergousoff, Amy L. Greer, Katie M. Clow   +4 more
wiley   +1 more source

An epidemiological and serological study of Rickettsia in Western Australia

, 2011
The study was aimed at investigating Western Australian rickettsiae, delving deeper into the epidemiology of a recently described rickettsia, Rickettsia gravesii, and any other rickettsiae lurking in the Western Australian bush. Prior to the discovery of
Abdad, Mohammad
core  

Characterization of recombinant proteins from Rickettsia rickettsii for serological diagnosis in patients

, 2023
Brazilian Spotted Fever (BSF) is a disease strongly associated with wild boars (Sus scrofa) as its primary hosts, caused by the etiological agent Rickettsia rickettsii.
Loza, Maribel Limachi
core   +1 more source

Study of infection by Rickettsiae of the spotted fever group in humans and ticks in an urban park located in the City of Londrina, State of Paraná, Brazil

Revista da Sociedade Brasileira de Medicina Tropical, 2011
INTRODUCTION: Spotted fevers are emerging zoonoses caused by Rickettsia species in the spotted fever group (SFG). Rickettsia rickettsii is the main etiologic agent of Brazilian spotted fever (BSF) and it is transmitted by Amblyomma spp. ticks.
Roberta Santos Toledo, Katia Tamekuni, Mauro de Freitas Silva Filho, Valeska Bender Haydu, Richard Campos Pacheco, Marcelo Bahia Labruna, John Stephen Dumler, Odilon Vidotto   +7 more
doaj   +1 more source

Rickettsia spp. and Anaplasmataceae in Ticks From Domestic Animals in Northern Colombia

Zoonoses and Public Health, Volume 72, Issue 5, Page 421-434, August 2025.
ABSTRACT Introduction Tick‐borne diseases have a significant impact on public and animal health and represent a considerable financial burden on livestock farming. However, in many regions of Latin America, comprehensive epidemiological data, including species identification, geographical distribution and molecular profiling of ticks and their ...
Maria Badillo‐Viloria, Salim Mattar, Susana Remesar, Steffania de la Rosa‐Jaramillo, Ignacio García‐Bocanegra, Jorge Miranda, Aránzazu Portillo, Cristina Cervera‐Acedo, José Antonio Oteo, David Cano‐Terriza   +9 more
wiley   +1 more source

Brazilian spotted fever in cart horses in a non-endemic area in Southern Brazil Febre maculosa brasileira em cavalo de carroceiro em área não-endêmica no Sul do Brasil

Revista Brasileira de Parasitologia Veterinária, 2010
Brazilian Spotted Fever (BSF) is an often fatal zoonosis caused by the obligate intracellular bacterium Rickettsia rickettsii. The disease is generally transmitted to humans by Amblyomma spp. ticks. Serological evidence of past infection by R. rickettsii
Marta Cristina Diniz de Oliveira Freitas, Marcelly Grycajuk, Marcelo Beltrão Molento, José Bonacin, Marcelo Bahia Labruna, Richard de Campos Pacheco, Jonas Moraes-Filho, Ivan Deconto, Alexander Welker Biondo   +8 more
doaj   +1 more source

Evaluation of changes to the Rickettsia rickettsii transcriptome during mammalian infection. [PDF]

PLoS One, 2017
The lifecycle of Rickettsia rickettsii includes infection of both mammalian and arthropod hosts, with each environment presenting distinct challenges to survival.
Riley SP, Pruneau L, Martinez JJ.
europepmc   +2 more sources

Investigation of Anti‐IgG Antibody Responses to the 17‐kDa Outer Membrane Protein of Rickettsia japonica in Individuals From a High‐Risk Area for Japanese Spotted Fever

Experimental Dermatology, Volume 34, Issue 7, July 2025.
ABSTRACT This study evaluated the seroprevalence and persistence of IgG antibodies against Rickettsia japonica's outer membrane protein (Omp) using a recombinant 17‐kDa antigen and Western blot analysis in residents of Minamiise, Japan—a high‐incidence Japanese spotted fever (JSF) area—and in individuals from non‐endemic regions.
Makoto Kondo, Koji Habe, Keiichi Yamanaka   +2 more
wiley   +1 more source

Detection and characterization of rickettsiae in Western Australia

, 2007
The aim of this study was to address the shortfall in current, in-depth knowledge of Western Australian rickettsiae investigating in particular, the role of native and feral animals as reservoir hosts.
Owen, Helen Clare
core