Results 51 to 60 of about 4,015 (217)

Seroprevalence of Rickettsia rickettsii and Rickettsia parkeri in dogs during a Brazilian Spotted Fever outbreak in the State of Rio de Janeiro

Arquivo Brasileiro de Medicina Veterinária e Zootecnia
The present paper is the first to perform this evaluation in dogs from the cities of Natividade, Porciuncula and Varre-Sai. The aim of this study is to search for Spotted Fever Group Rickettsia in canine sera using indirect immunofluorescence assay and ...
I.T. Poubel, N.C. Cunha, A.B.M. Fonseca, A. Pinter, A.H. Fonseca, M.D. Cordeiro, N.R.P. Almosny   +6 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

Canine Spotted Fever Group Rickettsial Seroprevalence as an Indicator for Human Rocky Mountain Spotted Fever Case Rates in Arizona, USA

Zoonoses and Public Health, Volume 72, Issue 8, Page 697-705, December 2025.
ABSTRACT Introduction Rocky Mountain spotted fever (RMSF), a rapidly progressing febrile disease caused by the bacterium Rickettsia rickettsii, is the deadliest tick‐borne disease in the world. Human infection initially results in non‐specific symptoms and, if untreated, can result in death in up to 35% of cases.
Alec Oliva, Rachael Kreisler, Andrea Romkema, Soren Madsen, Haley Furman, Christopher Maag, Charles Schaefer, Jose A. Hernandez, Jung Keun Lee, Michael Quinlan, John VandenBrooks   +10 more
wiley   +1 more source

Ecology, biology and distribution of spotted-fever tick vectors in Brazil

Frontiers in Cellular and Infection Microbiology, 2013
Spotted-fever caused Rickettsia rickettsii infection is in Brazil the major tick-borne zoonotic disease. Recently a second and milder human rickettsiosis caused by an agent genetically related to R.
Matias Pablo Juan Szabó, Adriano ePinter, Marcelo Bahia Labruna   +2 more
doaj   +1 more source

A Case of Illness Following a Bite by a Male Lone Star Tick (Amblyomma americanum Linnaeus) Infected With Ehrlichia sp. and Rickettsia amblyommatis in Connecticut, United States

Clinical Case Reports, Volume 13, Issue 9, September 2025.
A case of local lymphadenopathy and a flu‐like illness in a man, following a bite by a male lone star tick infected with Ehrlichia sp. and Rickettsia amblyommatis. ABSTRACT The lone star tick (Amblyomma americanum Linnaeus) is a species commonly found in the southeastern U.S., but in recent years its populations have expanded northward, resulting in an
Noelle Khalil, Abigail Chang, Lorelei Sandland, Henry M. Feder Jr., Goudarz Molaei   +4 more
wiley   +1 more source

Frequency of antibodies class IgG anti-Rickettsia rickettsii in horses of Universidade Federal Rural do Rio de Janeiro, Seropédica campus

Brazilian Journal of Veterinary Medicine, 2015
. Cordeiro M.D., Raia V.A., Valim J.R.A., Castro G.N.S., Souza C.E. & Fonseca A.H. [Frequency of antibodies class IgG anti-Rickettsia rickettsii in horses of Universidade Federal Rural do Rio de Janeiro, Seropédica campus.] Frequência de anticorpos da ...
Matheus Dias Cordeiro, Vanessa de Almeida Raia, Jaqueline Rodrigues de Almeida Valim, Gustavo Nunes de Santana Castro, Celso Eduardo de Souza, Adivaldo Henrique da Fonseca   +5 more
doaj  

Encefalite por Rickettsia sem exantema: a propósito de um caso clínico

Revista Educação em Saúde, 2018
Objective:: To report a rare case of Rickettsia encephalitis without exanthema. Case report:A 44-year-old male patient, a rural worker, presented daily fever, myalgia and asthenia progressing with left eye amaurosis, ataxia, mental ...
Talita Fernandes Araújo, Luís Pedro Ferreira de Assis, Paulo Ricardo de Lima   +2 more
doaj   +1 more source

Clonal T Cell Proliferation Induced by Acute Anaplasmosis in a Dog

Journal of Veterinary Internal Medicine, Volume 39, Issue 5, September/October 2025.
ABSTRACT A 4‐year‐old spayed female Golden Retriever was examined for hindlimb lameness, lethargy, poor appetite, and pyrexia 3 weeks after the removal of numerous ticks. Complete blood count revealed moderate thrombocytopenia and mild lymphopenia. A SNAP 4Dx test was negative for Borrelia burgdorferi, Ehrlichia spp., Anaplasma spp., and Dirofilaria ...
Sean R. Teichner, Lisa L. Powell, Allison S. Mazepa   +2 more
wiley   +1 more source

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

Rocky Mountain Spotted Fever, Panama

Emerging Infectious Diseases, 2007
We describe a fatal pediatric case of Rocky Mountain spotted fever in Panama, the first, to our knowledge, since the 1950s. Diagnosis was established by immunohistochemistry, PCR, and isolation of Rickettsia rickettsii from postmortem tissues.
Dora Estripeaut, María Gabriela Aramburú, Xavier Sáez-Llorens, Herbert A. Thompson, Gregory A. Dasch, Christopher D. Paddock, Sherif Zaki, Marina E. Eremeeva   +7 more
doaj   +1 more source