Aspectos epidemiológicos da febre maculosa no município de Quirinópolis, Goiás, Brasil / Epidemiological characteristics of spotted fever in the municipality of Quirinópolis, Goias, Brazil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Rocky Mountain spotted fever (FM), a zoonosis transmitted to humans through the bite of ticks infected with Rickettsia spp. Especially R. rickettsii, emerged in the United States in the late 19th century, been taking place in Brazil in the mid 20th century. Since then, in Brazil the disease, initially diagnosed in São Paulo, became identified focally in some cities, getting to the end of the 20th century restricted states in the Southeast. Already at the beginning of the 21st century FM was first identified in Southern states, focusing in Santa Catarina and also, occasionally, been observed in rare cases that occurred in states in other regions of the country: State Federal, Bahia, Rondônia and Amapá. Given the above, and aiming to collaborate with the service of Epidemiology in Goias, this unprecedented study throughout the Midwest Region, proposes and creates conditions for the first milestone for the monitoring of FM in this State, by means of serological screening with indirect immunofluorescence assay (IFA) in sera of animals and humans, in addition to the research of tick vectors. This study took place in the city of Quirinópolis-GO, and despite not having been detected in the chain reaction polymerase (PCR), ticks infected with Rickettsia spp., the principal vector of FM in Brazil, the tick Amblyomma cajennense, was observed. In previous pilot study conducted in February 2007 in Quirinópolis-GO, serology by IFAT reagents detected in 25% (7 / 28) of humans in a group of individuals cohabiting with a suspected case of FM, which was notified to the Ministry of Health (MOH) of Brazil in 2006, and in 0% (0 / 5) of dogs and 28.6% (12/42) of horses from 3 rural property where the suspect case was before the manifestation of signs of illness. There were two horses positive sera in these three farms. Unable to trace the likely source of infection, but the findings here obtained allowed to suspect that the suspected case of FM has been in one of these two farms the likely source of antigenic contact with bacteria or micro-FM group antigenically similar. Already in scale epidemiological study horses, held in March 2007 on 20 farms, found the prevalence of positive sera of 11.6% (39/335) among horses and the frequency of seropositive 36.6% (15/41 ) between the human and 16.7% (2 / 12) among the dogs from these properties to create horses. Humans here tested HIV positive were asymptomatic for FM at the time of sample collection. It was concluded that the FM, or antigenically similar disease, may be occurring in the State of Goiás, in the City of Quirinópolis

ASSUNTO(S)

saude animal (programas sanitarios) dogs, ticks, horse, ifa, pcr, rickettsia spp cães, carrapatos, eqüinos, rifi, pcr, rickettsia spp

ACESSO AO ARTIGO

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