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Environmental backgrounds and ticks associated with Brazilian spotted-fever caused by human infection with R. rickettsii in Brazil. Capybaras in anthropized area (A). Tick-infested capybara (B). Male and female adults of Amblyomma cajennense (Ac) and Amblyomma dubitatum (Ad). Endemic human settlement at the border of the Atlantic rainforest and metropolitan area of São Paulo (C). Dog ear with an attached Amblyomma aureolatum (D). Adult couple of Amblyomma aureolatum (Aa).
