During most of the 20th century, the epidemiology of tick-borne rickettsioses could be
summarized as the occurrence of a single pathogenic rickettsia on each continent. An …

Twenty eight species of Ixodidae have been found on man in South America (21
Amblyomma, 1 Boophilus, 2 Dermacentor, 2 Haemaphysalis, 1 Ixodes and 1 Rhipicephalus …

Until the year 2000, only three Rickettsia species were known in South America:(i) Rickettsia
rickettsii, transmitted by the ticks Amblyomma cajennense, and Amblyomma aureolatum …

We compared the rickettsial infection status of Amblyomma cajennense ticks, humans, dogs,
and horses in both Brazilian spotted fever (BSF)–endemic and–nonendemic areas in the …

Rickettsia are best known as strictly intracellular vector‐borne bacteria that cause mild to
severe diseases in humans and other animals. Recent advances in molecular tools and …

Data on genus and infectious by Rickettsia were retrospectively compiled from the critical
review literature regarding all countries in Latin America, Caribbean islands, Portugal and …

Background. Rickettsia parkeri rickettsiosis, a recently identified spotted fever transmitted by
the Gulf Coast tick (Amblyomma maculatum), was first described in 2004. We summarize the …

Abstract Amblyomma maculatum Koch (the Gulf Coast tick) is a three-host, ixodid tick that is
distributed throughout much of the southeastern and south-central United States, as well as …

New human rickettsial pathogens have been discovered, and long-known rickettsiae of
undetermined pathogenicity have been demonstrated to cause illness. Disease associated …

Recently, a novel human rickettsiosis, namely Atlantic rainforest spotted fever, was
described in Brazil. We herein report results of a survey led around the index case in an …