Serological survey of Rickettsia sp. in horses and dogs in an non-endemic area in Brazil

Brazilian Spotted Fever (BSF) is a lethal rickettsiosis in humans caused by the bacteria Rickettsia rickettsii, and is endemic in some areas of Brazil. Horses and dogs are part of the disease's life cycle and they may also serve as sentinel animals in epidemiological studies. The first human BS...

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Published in:	Revista brasileira de parasitologia veterinaria Vol. 19; no. 4; pp. 205 - 209
Main Authors:	Batista, Fernanda Gonçalves(Federal University of Paraná Laboratory of Parasitic Diseases), Silva, Daniella Matos da(Federal University of Paraná Laboratory of Parasitic Diseases), Green, Kerriel Thandile(Federal University of Paraná Laboratory of Parasitic Diseases), Tezza, Louise Boulsfield de Lorenzi(Federal University of Paraná Laboratory of Parasitic Diseases), Vasconcelos, Sâmara Pereira de(Federal University of Paraná Laboratory of Parasitic Diseases), Carvalho, Suelen Graziele Soares de(Federal University of Paraná Laboratory of Parasitic Diseases), Silveira, Iara(University of São Paulo Department of Preventative Veterinary Medicine), Moraes-Filho, Jonas(University of São Paulo Department of Preventative Veterinary Medicine), Labruna, Marcelo Bahia(University of São Paulo Department of Preventative Veterinary Medicine), Fortes, Fernanda Silva(Federal University of Paraná Laboratory of Parasitic Diseases), Molento, Marcelo Beltrão(Federal University of Paraná Laboratory of Parasitic Diseases)
Format:	Journal Article
Language:	English
Published:	Brazil Colégio Brasileiro de Parasitologia Veterinária 01-10-2010
Subjects:	Animals Antibodies, Bacterial - blood Brazil - epidemiology brazilian spotted fever Carrapatos Dog Diseases - blood Dog Diseases - epidemiology Dog Diseases - microbiology Dogs emerging zoonosis febre maculosa brasileira Horse Diseases - blood Horse Diseases - epidemiology Horse Diseases - microbiology Horses PARASITOLOGY Rickettsia rickettsii - immunology Rocky Mountain Spotted Fever - blood Rocky Mountain Spotted Fever - epidemiology Rocky Mountain Spotted Fever - veterinary Seroepidemiologic Studies Ticks VETERINARY SCIENCES zoonose emergente Brazil febre maculosa brasileira zoonose emergente brazilian spotted fever emerging zoonosis Carrapatos Ticks
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Summary:	Brazilian Spotted Fever (BSF) is a lethal rickettsiosis in humans caused by the bacteria Rickettsia rickettsii, and is endemic in some areas of Brazil. Horses and dogs are part of the disease's life cycle and they may also serve as sentinel animals in epidemiological studies. The first human BSF case in the State of Paraná was reported in 2005. The present study was conducted in the municipality of Almirante Tamandaré, where no previous case of BSF was reported. Serum samples were collected from 71 horses and 20 dogs from nine properties in the area. Ticks were also collected from these animals. All farmers completed a questionnaire about their knowledge of BSF and animal health management. Serum samples were analyzed by indirect immunofluorescent-antibody assay (IFA) using R. rickettsii and R. parkeri as antigens. Ticks were analyzed by PCR for Rickettsia sp., and all of them were PCR-negative. Six horses (8.45%) and 4 dogs (20%) were identified as seropositive. Farmers were not aware of the correlation between the presence of ticks and risk of BSF. Although a non-endemic area, Almirante Tamandaré is a vulnerable environment for BSF and effective tick control measures are required. A Febre Maculosa Brasileira (FMB) é uma riquetsiose letal para humanos, causada pela bactéria Rickettsia rickettsii, e é endêmica em algumas regiões brasileiras. Equinos e cães podem participar do ciclo da doença e podem também servir como sentinelas em estudos epidemiológicos. O primeiro caso humano relatado no Estado do Paraná ocorreu em 2005. O presente estudo foi realizado no município de Almirante Tamandaré, região onde não há relatos de casos de FMB. Foram coletadas amostras de sangue de 71 cavalos e 20 cães em nove propriedades rurais na região. Carrapatos também foram colhidos dos animais. Todos os proprietários responderam a um questionário sobre o manejo sanitário dos animais e o conhecimento a respeito da FMB. As amostras de soro foram processadas pela técnica de Reação de Imunofluorescência Indireta (RIFI), utilizando-se os antígenos de R. rickettsii e R. parkeri. Os carrapatos foram analisados por PCR para Rickettsia sp. e todos foram negativos. Seis cavalos (8,45%) e 4 cães (20%) foram identificados como soropositivos. Todos os proprietários desconheciam a relação de carrapatos com a FMB. Embora considerada uma área não endêmica, Almirante Tamandaré é um ambiente vulnerável à FMB e um controle eficiente de carrapatos deve ser implementado.
Bibliography:	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-29612010000400003&lng=en&nrm=iso&tlng=en ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1984-2961 1984-2961
DOI:	10.1590/S1984-29612010000400003