| ecology of a tick-borne spotted fever in southern brazil. | rio grande do sul is the southernmost state of brazil, bordering uruguay. clinical cases of spotted fever group (sfg) rickettsiosis were recently reported in rio grande do sul. none of these cases was lethal, and all were confirmed by seroconversion to r. rickettsii antigens. because serological cross-reactions are well known to occur between different sfg agents, the sfg agent responsible for the clinical cases remains unknown in rio grande do sul, where no rickettsial agent is known to infect ... | 2016 | 27392739 |
| rickettsia parkeri in amblyomma dubitatum ticks in a spotted fever focus from the brazilian pampa. | spotted fever is an acute febrile illness, which is considered severely underreported and misdiagnosed in the brazilian pampa, caused by tick-borne rickettsiae. here, we report an eco-epidemiological investigation of rickettsia spp. in ticks from a spotted fever focus in toropi, southern brazil. ticks were collected from capybara carcasses and processed individually to obtain genomic dna. rickettsia was investigated using pcr that amplified the rickettsial fragments of the glta, ompa and htra ge ... | 2017 | 28359827 |