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- W2735391247 abstract "Introduction: Spotted fevers are emerging zoonoses, caused by Rickettsia species in the spotted fever group (SFG). Rickettsia rickettsii is the main etiological agent of the Brazilian Spotted Fever (BSF) and it is transmitted by Amblyomma spp. ticks. Methods: With the aim of gathering information about SFG rickettsiae in the Arthur Thomas Municipal Park in Londrina, PR, free-living ticks and ticks from capybaras were collected, as well as the collection of blood samples from personnel working in these areas. Samples from A. dubitatum and A. cajennense were submitted for PCR in pools for the analysis of R. rickettsii glt A ( citrate synthase gene). Results: All pools analyzed were considered negative. Human sera were tested by indirect imunofluorescence assay with R. rickettsii and R. parkeri as antigens. Among 34 sera analyzed, seven (20.6%) reacted to R. rickettsii but none reacted to R. parkeri. An epidemiological questionnaire was given to humans, but there were no statistically significant associations. Conclusion: The serological studies suggest the presence of Rickettsiae related to SFG that could be infecting the human population studied. However, analysis of ticks was unable to determine which species could be involved in transmission to humans. Key words : Amblyomma dubitatum, Amblyomma cajennense, rickettsia, epidemiology, PCR." @default.
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- W2735391247 date "2012-10-04" @default.
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- W2735391247 title "Infection by Spotted Fever Group Rickettsiae in Humans and Ticks from an Urban Park in Londrina, Parana State, Brazil" @default.
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