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Cadernos de Saúde Pública

On-line version ISSN 1678-4464Print version ISSN 0102-311X


GALVAO, Márcio A. M. et al. Emerging and reemerging rickettsiosis in an endemic area of Minas Gerais State, Brazil. Cad. Saúde Pública [online]. 2002, vol.18, n.6, pp.1593-1597. ISSN 1678-4464.

This article describes a serological survey for rickettsiosis in the county of Novo Cruzeiro, Minas Gerais State, Brazil, in 1998, testing schoolchildren and dogs. Sera included 331 samples from schoolchildren from an endemic area and 142 samples from schoolchildren from a non-endemic area in the county. All children examined were healthy and had not reported clinical symptoms of Brazilian spotted fever prior to the serological survey. Some 35 children in the endemic area were reactive to Rickettsia rickettsiiby indirect fluorescent antibody (IFA) with a titer of 1:64, corresponding to 10.6%. Sera from 73 dogs were tested, showing seroreactivity (IFA 1:64) to Rickettsia rickettsi, Ehrlichia chaffeensis, and Ehrlichia canisin 3 (4.11%), 11 (15.07%), and 13 (17.81%), respectively. The results in schoolchildren and the presence of canine seroreactivity to Ehrlichiaspecies that are potentially pathogenic to humans suggests the risk of transmission of other Rickettsiaein the study area.

Keywords : Rickettsia rickettsii; Rickettsia Infections; Ehrlichia; Rocky Mountain Spotted Fever.

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