• Publications
  • Influence
Detection of Rickettsia rickettsii in the tick Amblyomma cajennense in a new Brazilian spotted fever-endemic area in the state of Minas Gerais.
The present study showed molecular evidence for the presence of R. rickettsii in A. cajennense from a BSF-endemic area in Coronel Pacheco, state of Minas Gerais. Expand
Rickettsia parkeri in Brazil
The Rickettsia parkeri isolate was successfully established in Vero cell culture and molecular characterization of the agent was performed by DNA sequencing of portions of the rickettsial genes gltA, htrA, ompA, and ompB. Expand
Infection by Rickettsia bellii and Candidatus “Rickettsia amblyommii” in Amblyomma neumanni Ticks from Argentina
The results reinforce previous findings that R. bellii (and probably CandidatusR. amblyommii) are widespread among some Neotropical Amblyomma species, suggesting that these ticks gained these bacterial agents from a common ancestor and/or by recent horizontal transmission of rickettsiae between ticks. Expand
Isolation of Rickettsia rhipicephali and Rickettsia bellii from Haemaphysalis juxtakochi Ticks in the State of São Paulo, Brazil
Rickettsia bellii is indeed the most frequent Rickettsia species infecting ticks in Brazil, and both isolate HJ#5 and strain R300 were identified as South American strains of R. rhipicephali, which was confirmed in this continent for the first time. Expand
Rickettsial infection in Amblyomma nodosum ticks (Acari: Ixodidae) from Brazil
Rickettsiae were successfully isolated from two ticks, using cultures of Vero cells, and both isolates were molecularly characterised, using the rickettsial genes gltA and htrA and, when possible, also ompA and ompB. Expand
Rickettsial infections of dogs, horses and ticks in Juiz de Fora, southeastern Brazil, and isolation of Rickettsia rickettsii from Rhipicephalus sanguineus ticks
The results of the present study indicate a potential risk for transmission of R. rickettsii to humans by Rh. Expand
Survey of helminth parasites of cats from the metropolitan area of Cuiabá, Mato Grosso, Brazil.
This is the first time cats parasitized with Centrorhynchus erraticus are reported in the Americas and the presence of species of helminths with zoonotic potential is observed. Expand
Ticks (Acari: Ixodidae) Infesting Birds in an Atlantic Rain Forest Region of Brazil
Brazil has the third richest bird diversity of the world; however, there are few data concerning ticks (Acari: Ixodidae) parazitizing birds, and tick infestations on wild birds from an Atlantic rain forest region of Brazil are reported. Expand
Experimental infection of Rhipicephalus sanguineus ticks with the bacterium Rickettsia rickettsii, using experimentally infected dogs.
We evaluated if Rickettsia rickettsii-experimentally infected dogs could serve as amplifier hosts for hipicephalus sanguineus ticks. In addition, we checked if Rh. sanguineus ticks that acquired Ri.Expand
Canine infection by rickettsiae and ehrlichiae in southern Brazil.
This study evaluated the infection caused by Rickettsia and Ehrlichia agents among dogs in southern Brazil and found dogs that had direct contact with pasture or forest areas were > 2 times more likely to be seroreactive toRickettsia than dogs with no such direct contact. Expand