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Rickettsial spotted fever in capoeirão Village, Itabira, Minas Gerais, Brazil / Rickettsiose do grupo da febre maculosa na Vila de Capoeirão, Itabira, Minas Gerais, Brasil
Vianna, Manoella Campostrini Barreto; Horta, Maurício Claudio; Sangioni, Luis Antônio; Cortez, Adriana; Soares, Rodrigo Martins; Mafra, Cláudio Lisias; Galvão, Márcio Antônio Moreira; Labruna, Marcelo Bahia; Gennari, Solange Maria.
  • Vianna, Manoella Campostrini Barreto; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
  • Horta, Maurício Claudio; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
  • Sangioni, Luis Antônio; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
  • Cortez, Adriana; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
  • Soares, Rodrigo Martins; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
  • Mafra, Cláudio Lisias; Federal University of Viçosa. Biochemistry and Molecular Biology Department. Viçosa. BR
  • Galvão, Márcio Antônio Moreira; Federal University of Ouro Preto. Clinical and Social Nutrition. Ouro Preto. BR
  • Labruna, Marcelo Bahia; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
  • Gennari, Solange Maria; University of São Paulo. Faculty of Veterinary Medicine. Preventive Veterinary Medicine Department. São Paulo. BR
Rev. Inst. Med. Trop. Säo Paulo ; 50(5): 297-301, Sept.-Oct. 2008. mapas, tab
Article in English | LILACS | ID: lil-495766
ABSTRACT
The present study investigated the infection by spotted fever rickettsia in an endemic area for Brazilian spotted fever (BSF; caused by Rickettsia rickettsii) in Minas Gerais State, Brazil. Human, canine and equine sera samples, and Amblyomma cajennense adult ticks collected in a rural area of Itabira City, Minas Gerais State were tested for rickettsial infection. Through Immunofluorescence Assay (IFA) we demonstrated the presence of antibodies anti-R. rickettsii in 8.2 percent, 81.3 percent and 100 percent of the human, canine and equine sera, respectively. None of the 356 tick specimens analyzed were positive for Rickettsia by the hemolymph test or Polymerase Chain Reaction technique (PCR) for the htrA and the gltA genes. Our serological results on horses and dogs (sentinels for BSF) appoint for the circulation of a SFG Rickettsia in the study area, however in a very low infection rate among the A. cajennense tick population.
RESUMO
O presente estudo investigou a infecção por rickéttsias do grupo da febre maculosa (GFM) em área endêmica para febre maculosa brasileira (FMB; causada por Rickettsia rickettsii) no Estado de Minas Gerais, Brasil. Amostras de soros de humanos, cães e eqüídeos, e carrapatos Amblyomma cajennense adultos colhidos em um povoado rural em Itabira, Minas Gerais foram testados para infecção por Rickettsia. Pela Reação de Imunofluorescência Indireta (RIFI) foram detectados anticorpos anti-R. rickettsii em 8,2 por cento dos soros humanos, 81,3 por cento dos cães e em 100 por cento dos eqüídeos. Nenhum dos 356 carrapatos se mostrou positivo para Rickettsia no teste de hemolinfa e na reação em cadeia pela polimerase (PCR) objetivando amplificar fragmentos de DNA dos genes htrA and the gltA. Os resultados sorológicos em eqüinos e cães (sentinelas para FMB) apontam para a circulação de uma rickéttsia do GFM na área do estudo, porém, numa freqüência de infecção muito baixa na população do carrapato A. cajennense.
Subject(s)

Full text: Available Index: LILACS (Americas) Main subject: Rickettsia / Ticks / Rocky Mountain Spotted Fever / Endemic Diseases / Insect Vectors / Antibodies, Bacterial Type of study: Diagnostic study / Screening study Limits: Animals / Humans Country/Region as subject: South America / Brazil Language: English Journal: Rev. Inst. Med. Trop. Säo Paulo Journal subject: Tropical Medicine Year: 2008 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Ouro Preto/BR / Federal University of Viçosa/BR / University of São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Rickettsia / Ticks / Rocky Mountain Spotted Fever / Endemic Diseases / Insect Vectors / Antibodies, Bacterial Type of study: Diagnostic study / Screening study Limits: Animals / Humans Country/Region as subject: South America / Brazil Language: English Journal: Rev. Inst. Med. Trop. Säo Paulo Journal subject: Tropical Medicine Year: 2008 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Ouro Preto/BR / Federal University of Viçosa/BR / University of São Paulo/BR