Abstract
Brazilian Spotted Fever (BSF) caused by rickettsiae of the spotted fever group (SFGR) and transmitted by ticks, re-emerged in the country, mainly in the Southeast. Hundreds of suspected human cases, including deaths, have been reported. Molecular researches indicate that at least three pathogenic species of SFGR, carried by fleas or ticks, circulate in ecotopes of the States of Sao Paulo …