Evidence of spotted fever group rickettsiae in state of Rio de Janeiro, Brazil

Ticks were obtained from dogs from February to September of 1999 at weekly intervals, in the County of Piraí, State of Rio de Janeiro. Four hundred seventy four ixodids were taxonomically identified, 103 Amblyomma cajennense, seven Amblyomma ovale, 209 Rhipicephalus sanguineus, and 155 Amblyomma sp....

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Published in:Revista do Instituto de Medicina Tropical de São Paulo 2002, Vol.44 (3), p.155-158
Main Authors: Rozental, Tatiana, Bustamante, Maria Cristina, Amorim, Marinete, Serra-Freire, Nicolau Maués, Lemos, Elba Regina Sampaio de
Format: Article
Language:English
Subjects:
Animals
Brazil
Brazil - epidemiology
Dog Diseases - epidemiology
Dogs
Hemolymph test
Humans
Rickettsia - isolation & purification
Rocky Mountain Spotted Fever - epidemiology
Rocky Mountain Spotted Fever - veterinary
Spotted fever
Ticks
Ticks - microbiology
TROPICAL MEDICINE
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Summary:Ticks were obtained from dogs from February to September of 1999 at weekly intervals, in the County of Piraí, State of Rio de Janeiro. Four hundred seventy four ixodids were taxonomically identified, 103 Amblyomma cajennense, seven Amblyomma ovale, 209 Rhipicephalus sanguineus, and 155 Amblyomma sp. An hemolymph test associated with Giemsa's stain revealed two specimens in 163 ticks tested (R. sanguineus and Amblyomma sp), containing rickettsia-like organisms. Direct immunofluorescence verified the presence of spotted fever group rickettsia in one specimen of R. sanguineus. Considering the limited information on rickettsiosis in Brazil, principally in relation to the vectors involved in perpetuating it in foci, these preliminary results give us an idea on the importance of infection in ticks, allowing to expand our knowledge on this zoonosis.
ISSN:0036-4665
1678-9946
0036-4665
1678-9946
DOI:10.1590/S0036-46652002000300008