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Year 2017 - Volume 37, Number 6
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Infection survey of Rickettsia rickettsii and Coxiella burnetii in sheep and goats from National Park of Serra das Confusões, Piauí, 37(6):555-560
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ABSTRACT.- Guimarães M.F., Araujo A.C., Freire D.P., Machado D.M.R., Martins N.N.V.M., Moraes-Filho J. & Horta M.C. 2017. [Infection survey of Rickettsia rickettsii and Coxiella burnetii in sheep and goats from National Park of Serra das Confusões, Piauí.] Investigação sorológica de Rickettsia rickettsii e Coxiella burnetii em caprinos e ovinos no entorno do Parque Nacional da Serra das Confusões, Piauí. Pesquisa Veterinária Brasileira 37(6):555-560. Laboratório de Parasitologia e Doenças Parasitárias, Universidade Federal do Vale do São Francisco, Rodovia BR- 407 Km 12, Lote 543, Projeto de Irrigação Senador Nilo Coelho s/n, C1, Petrolina, PE 56300-990, Brazil. Email: horta.mc@hotmail.com
The diseases caused by bacteria from the genera Rickettsia and Coxiella have hematophagous arthropods as vectors, mostly by ticks, which act directly on the transmission of pathogens that are responsible for diseases with major impact on veterinary and human medicine. The present study aimed to survey the infection of Rickettsia rickettsii and Coxiella burnetii in sheep and goats surrounding in the National Park of Serra das Confusões (NPSC), located in the state of Piauí, Northeast of Brazil. Serum samples from 202 goats and 153 sheep were tested by Indirect Immunofluorescence Assay (IFA) for the detection of antibodies against R. rickettsii and C. burnetii. The samples were considered positive when they showed titers ≥ 64. Ticks in parasitic stage were collected and identified. All samples from sheep and goats were seronegative for R. rickettsii. Seropositivity was verified in 2% (3/153) of the samples of sheep for C. burnetii, with titers ranging from 64 to 4096. The serum samples obtained from goats were seronegative to the above antigens. In total, 56 ticks were collected from 15 sheep (9.8%) all identified as Rhipicephalus microplus. The study demonstrated absence of infection by R. rickettsii in samples of sheep and goats, absence of infection of C. burnetii in goats; and the first report of serological occurrence of C. burnetii in sheep in this region of Brazil. |
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