Results 221 to 230 of about 21,637 (264)

Report of Amblyomma sculptum in a House in a Rickettsia rickettsii Circulation Area.

Vector Borne and Zoonotic Diseases, 2021
Amblyomma sculptum is a tick that has medical and veterinary importance as, in Brazil, it is the main vector of Rickettsia rickettsii, a disease affecting humans. The presence of ticks was observed outside a residence in a peri-urban area of the Atlantic
Matheus Araújo de Alkmim, L. Ferreira, E. Bastianetto, C. Bastos, J. Silveira   +4 more
semanticscholar   +1 more source

In Vitro Sensitivity of Rickettsia rickettsii to Doxycycline

Journal of Infectious Diseases, 1982
Legend. Dose response of Rickettsia rickettsii (strain Sheila Smith [SS]) to doxycycline by a plaque-reduction method [1]. Doxycycline hyclate (concentration, 850 ,ig/mg; Pfizer Laboratories, New York) was incorporated at various concentrations into an agarose overlay medium in 35-mm plastic petri dishes that contained a monolayer of chicken embryo ...
A. D. Waddell, Charles L. Wisseman
openaire   +3 more sources

Rickettsia rickettsii and Rickettsia montana from Ixodid Ticks in Connecticut

The American Journal of Tropical Medicine and Hygiene, 1986
Dermacentor variabilis, infected with spotted fever group rickettsiae, parasitized 8 of 70 raccoons captured in Newtown, Connecticut. The spotted fever agent, Rickettsia rickettsii, was isolated and identified from 4 adult D. variabilis and from 1 nymphal Ixodes texanus removed from raccoons.
Louis A. Magnarelli, Robert N. Philip, John F. Anderson, Willy Burgdorfer   +3 more
openaire   +2 more sources

Rickettsia rickettsii subsp. californica subsp. nov., the etiologic agent of Pacific Coast tick fever.

Journal of Infectious Diseases
The etiologic agent of Pacific Coast tick fever (PCTF), a moderately severe tickborne illness that resembles Rocky Mountain spotted fever (RMSF), was first isolated in 1966 from specimens of Dermacentor occidentalis (the Pacific Coast tick) obtained in ...
Christopher D. Paddock, Sandor E. Karpathy, Asa Henry, Luke Ryle, Joy A. Hecht, Jill K. Hacker, Kerry A Padgett, A. Kjemtrup, Hannah A Bullock, Robert S. Lane, Jason T. Ladner   +10 more
semanticscholar   +1 more source

A PLAQUE PROCEDURE FOR THE ASSAY OF RICKETTSIA RICKETTSII [PDF]

, 1968
Abstract : A plaque technique for the assay of Rickettsia rickettsii is described. The method employs primary chick fibroblast cell cultures with a semisolid agar overlay. Plaques were observed after 6 days' incubation, and the titers correlated well with those obtained in embryonated eggs infected by the yolk-sac route.
Edmund H. Weinberg, Jack R. Stakebake, Peter J. Gerone   +2 more
openaire   +1 more source

Rickettsia rickettsii in Rhipicephalus Ticks, Mexicali, Mexico

Journal of Medical Entomology, 2011
Circulation of a unique genetic type of Rickettsia rickettsii in ticks of the Rhipicephalus sanguineus complex was detected in Mexicali, Baja California, Mexico. The Mexican R. rickettsii differed from all isolates previously characterized from the endemic regions of Rocky Mountain spotted fever in northern, central, and southern Americas ...
Donald Macbeth, Celia Alpuche Aranda, Maria L. Zambrano, Lorenza Beati, Marina E. Eremeeva, Sandor E. Karpathy, Hector Olguin, Gregory A. Dasch, Beatriz Salceda, Maria Margarida Santos-Silva, Maria Margarida Santos-Silva, Luis Anaya   +11 more
openaire   +3 more sources

Rickettsia rickettsii

CABI Compendium, 2022
This datasheet on Rickettsia rickettsii covers Identity, Distribution, Hosts/Species Affected, Vectors & Intermediate Hosts.

semanticscholar   +1 more source

Rickettsia rickettsii (Rickettsiales: Rickettsiaceae) Infecting Amblyomma sculptum (Acari: Ixodidae) Ticks and Capybaras in a Brazilian Spotted Fever-Endemic Area of Brazil

Journal of medical entomology, 2019
The bacterium Rickettsia rickettsii is the agent of Brazilian spotted fever (BSF), a highly fatal disease that is transmitted in Brazil mainly by the tick Amblyomma sculptum Berlese, which uses capybaras (Hydrochoerus hydrochaeris Linnaeus) as major ...
F. Costa, M. Gerardi, L. C. Binder, H. Benatti, M. C. Serpa, B. Lopes, H. R. Luz, K. Ferraz, M. Labruna   +8 more
semanticscholar   +1 more source

Infection of Human Vascular Endothelial Cells by Rickettsia rickettsii

Journal of Infectious Diseases, 1984
Rocky Mountain spotted fever is caused by Rickettsia rickettsii, an obligate intracellular bacterial parasite. The organism primarily attacks endothelial cells and occasionally attacks smooth-muscle cells of small blood vessels. An effective means of examining host-parasite interaction in Rocky Mountain spotted fever would be to use an in vitro model ...
Sheila B. Bond, David Silverman
openaire   +3 more sources

THORACIC RADIOGRAPHIC FINDINGS IN DOGS INFECTED WITH RICKETTSIA RICKETTSII

Veterinary Radiology & Ultrasound, 1997
Sixteen beagle dogs were injected intradermally withRickettsia rickettsii.The dogs were divided into four groups (n=4):1) infected, non‐treated withdoxycycline;3) infected, treated with doxycycline and an anti‐inflammatory dose of corticosteroid;4) infected, treated with ocular fluoresein angiograhphy was performed on days 6, 10, 17 post‐inoculatin.A ...
Michael G. Davidson, Edward B. Breitschwerdt, Clifford R. Berry, Wm Tod Drost   +3 more
openaire   +3 more sources