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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 106, No. 8, 2011, pp. 926-930
Bioline Code: oc11184
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 106, No. 8, 2011, pp. 926-930

 en Spotted fever group Rickettsia infecting ticks (Acari: Ixodidae) in the state of Santa Catarina, Brazil
Medeiros, Alessandra Pereira; de Souza, Antonio Pereira; de Moura, Anderson Barbosa; Lavina, Marcia Sangaletti; Bellato, Valdomiro; Sartor, Amélia Aparecida; Nieri-Bastos, Fernanda Aparecida; Richtzenhain, Leonardo José & Labruna, Marcelo Bahia

Abstract

During 2006-2008, a total of 260 adult ticks were collected from domestic and wild animals in different regions of the state of Santa Catarina (SC), Brazil, including areas where human cases of Brazilian spotted fever have been reported. Collected ticks belonging to nine species ( Amblyomma aureolatum check for this species in other resources , Amblyomma cajennense check for this species in other resources , Amblyomma dubitatum check for this species in other resources , Amblyomma longirostre check for this species in other resources , Amblyomma ovale check for this species in other resources , Amblyomma tigrinum check for this species in other resources , Dermacentor nitens check for this species in other resources , Rhipicephalus microplus check for this species in other resources and Rhipicephalus sanguineus check for this species in other resources ) were tested by polymerase chain reaction (PCR) for rickettsial infection. Overall, eight (3.1%) ticks were found to be infected with Rickettsia species. After sequencing the PCR products, we determined that the sequences generated from three A. aureolatum, one A. ovale and one R. sanguineus from the municipality of Blumenau, one A. ovale from the municipality of Águas Mornas and one A. ovale from the municipality of Urussanga were identical to the corresponding partial rickettsial ompA gene sequence of Rickettsia parkeri check for this species in other resources strain Atlantic rainforest. The sequence generated from one A. longirostre from Blumenau was 100% identical to the corresponding partial rickettsial ompA gene sequence of Rickettsia amblyommii check for this species in other resources strain AL. Because R. parkeri strain Atlantic rainforest was recently shown to have caused two cases of human spotted fever in other states of Brazil, the role of this rickettsial agent as a possible etiological agent of spotted fever in SC is discussed.

Keywords
Rickettsia - spotted fever - ticks - Amblyomma - Rhipicephalus - Dermacentor

 
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