Anticorpos anti-rickettsias do grupo da febre maculosa em equídeos e caninos no norte do Estado do Paraná, Brasil

F.H Otomura,J.A Galhardo,R.C Pacheco,M.G Ribeiro,U Teodoro,M.B Labruna,L.A Sangioni

doi:10.1590/s0102-09352010000300037

Abstract

The Brazilian Spotted Fever (BSF) is a zoonosis that can be fatal if not trteated. As there are few studies of the BSF in the Parana State, the occurrence of BSF was serologically investigated in dogs and horses by indirect immunofluorescence assay (IFA), in the North of that State, in animals that are regarded as sentinels for BSF. A total of 241 samples of sera of equine, four of asinine, and 29 of dogs were collected in nine farms of three municipalities in the North of Parana: Arapongas, Douradina, and Umuarama. From fifteen samples of equine serum with positive titres for RIFI, eight (53.3 %) had titre of 64 against R. rickettsii, two (13.3 %) 128 against R. rickettsii, and five (33.3 %) were reactants for R. parkeri and R. rickettsii, with titres ranging from 64 to 2048, and 128 to 1024, respectively. The results showed that domestic animals, sentinels for BSF, are under low exposition to ticks infected with spotted fever group Rickettsia, indicating low risk of human infection by these agents in the studied area.

Highlights

As there are few studies of the Brazilian Spotted Fever (BSF) in the Paraná State, the occurrence of BSF was serologically investigated in dogs and horses by indirect immunofluorescence assay (IFA), in the North of that State, in animals that are regarded as sentinels for BSF
The results showed that domestic animals, sentinels for BSF, are under low exposition to ticks infected with spotted fever group Rickettsia, indicating low risk of human infection by these agents in the studied area
A vigilância ativa conduzida em animais sentinelas, como o presente trabalho, deve ser estimulada para a determinação de possíveis áreas endêmicas, antes mesmo da ocorrência de casos humanos da doença

Summary

Introduction

Anticorpos anti-rickettsias do grupo da febre maculosa em equídeos e caninos no norte do Estado do Paraná, Brasil Freitas (2007) realizou uma pesquisa de anticorpos para R. rickettsii em cavalos carroceiros de São José dos Pinhais, local do registro do primeiro caso paranaense, verificando que 6,5% dos animais testados apresentaram sorologia positiva para essa rickettsia.

Results

Conclusion