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.

"Candidatus Rickettsia asemboensis" in Rhipicephalus sanguineus ticks, Brazil.

"Candidatus Rickettsia asemboensis" is an obligate intracellular bacterium of the Rickettsiales order, genetically related to species belonging to the Rickettsia felis group, agents of flea-borne spotted fever. Here we report for the first time the detection of "Ca. R.

Genetic identification of Rickettsia sp. strain Atlantic rainforest in an endemic area of a mild spotted fever in Rio Grande do Sul state, Southern Brazil.

Rickettsia sp. strain Atlantic rainforest causes a less severe rickettsiosis, with two cases confirmed until now. The tick species Amblyomma ovale is appointed as the main vector of this bacterium.

Methylprednisolone administration alters adenine nucleotide hydrolysis in rat blood serum.

The effect of methylprednisolone on the hydrolysis of adenine nucleotides by rat blood serum enzymes was studied. Adult male Wistar rats were submitted to three different treatments with synthetic steroid methylprednisolone: one dose of 50 mg/kg, i.p.