Primary isolation of spotted fever group rickettsiae from Amblyomma cooperi collected from Hydrochaeris hydrochaeris in Brazil.
نویسندگان
چکیده
This paper reports the first isolation of a spotted fever group rickettsia from an Amblyomma cooperi ixodid collected from a capybara (Hydrochaeris hydrochaeris) in an endemic area of spotted fever in the County of Pedreira, State of São Paulo, Brazil. Isolation was performed in Vero cell culture and submitted to immunofluorescence, using antibody from Rickettsia rickettsii-positive human serum.
منابع مشابه
Infestation by ticks and detection of antibodies to spotted fever group rickettsiae in wild animals captured in the state of São Paulo, Brazil. A preliminary report.
Since 1985 several human cases of Brazilian spotted fever, an acute infectious disease of variable severity, has been reported in the county of Pedreira, State of São Paulo. Since humans are accidental victims, the epidemiology of this tickborne rickettsiosis depends primarily on the species and ecology of the tick vector involved and its mammal hosts. Several species of ticks have been recogni...
متن کاملStudy 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.
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. METHODS The study aimed to investigate SFG rickettsiae in the Arthur Thomas Municipal Park in Londrina, PR, by collecting free-living ticks and ticks fro...
متن کاملRickettsial infection in capybaras (Hydrochoerus hydrochaeris) from São Paulo, Brazil: serological evidence for infection by Rickettsia bellii and Rickettsia parkeri.
INTRODUCTION In Brazil, capybaras (Hydrochoerus hydrochaeris) are important hosts for Amblyomma ticks, which in turn can transmit rickettsiae to humans and animals. Therefore, capybaras are potential sentinels for rickettsial infection. OBJECTIVE The present study evaluated rickettsial infection in capybaras in different areas of the state of São Paulo, where rickettsiosis has never been repo...
متن کاملEcology, biology and distribution of spotted-fever tick vectors in Brazil
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. parkeri was discovered in the country (Atlantic rainforest strain). Both diseases clearly have an ecological background linked to a few tick species and their environment. Capybaras (Hydrochoerus h...
متن کاملTransmission dynamics and control of Rickettsia rickettsii in populations of Hydrochoerus hydrochaeris and Amblyomma sculptum
BACKGROUND Brazilian Spotted Fever (BSF), caused by the bacterium Rickettsia rickettsii, is the tick-borne disease that generates the largest number of human deaths in the world. In Brazil, the current increase of BSF human cases has been associated with the presence and expansion of capybaras Hydrochoerus hydrochaeris, which act as primary hosts for the tick Amblyomma sculptum, vector of the R...
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ورودعنوان ژورنال:
- Memorias do Instituto Oswaldo Cruz
دوره 91 3 شماره
صفحات -
تاریخ انتشار 1996