Detecção sorológica e molecular de agentes infecciosos em onças-pintadas (Panthera onca) de vida livre em unidades de conservação do Pantanal matogrossense, Brasil

• Ano de defesa: 2014
• Autor(a) principal: Onuma, Selma Samiko Miyazaki
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Faculdade de Agronomia, Medicina Veterinária e Zootecnia (FAMEVZ); UFMT CUC - Cuiabá; Programa de Pós-Graduação em Ciências Veterinárias
• Palavras-chave em Português: Agentes infecciosos; Carrapatos; Pantanal; Panthera onca; Unidade de conservação; Zoonose; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA; Infectious agents; Ticks; Conservation unit; Zoonosis
• Link de acesso: http://ri.ufmt.br/handle/1/537

Blood samples from 11 free-living jaguars (Panthera onca) were collected in two federal conservation units in the Pantanal of Mato Grosso state to determine the health profile of these populations . The presence of serum antibodies for Ehrlichia spp., Rickettsia spp., Toxoplasma gondii, Neospora caninum and Sarcocystis neurona was investigated by Immunofluorescence Assay (IFA); for Leptospira spp by the Microscopic Agglutination Test (MAT). and for Brucella abortus by rose Bengal test . Blood genomic DNA in each sample was tested by Polymerase Chain Reaction( PCR ) to identify Ehrlichia spp . , Rickettsia spp . , Hepatozoon spp . and Cytauxzoon spp. Two females of Amblyomma cajennense ticks collected from an animal were tested by PCR for DNA detection of Ehrlichia spp . and Rickettsia spp. Two jaguars were seropositive for Ehrlichia spp ., with antibody titres of 80 and 320, respectively. Nine animals were positive for at least four species of Rickettsia spp. Ten, 7 and 8 of the sampled animals were seropositive for T. gondii, N. caninum and S. neurona, respectively. Two jaguars were seroreactive for Leptospira spp. antigen and the most likely infecting serotype in both animals was a Brazilian isolate of serovar Canicola ( L01 ) . All serum samples were negative for B. abortus. No Anaplasmataceae and Ehrlichia DNA was detected by PCR or by Heminested-PCR. One sample was positive by PCR for Rickettsia spp. according to the citrate synthase gene (gltA), but it was negative for the ompA rickettsial gene of the spotted fever group. An A. cajennense collected showed riquetsial DNA whose sequence showed 99 % similarity to R. amblyommii . Seven samples presented DNA fragments of Hepatozoon spp., with 99% similarity to H. felis and 10 of the 11 samples were positive for DNA fragments of Cytauxzoon spp., with 99 % similarity to C. felis. The present study showed that free-living jaguars in northern Pantanal were exposed to numerous pathogens, and an integrated approach to wildlife conservation and integrity of public health is a prominent issue in order to determine management interventions in protected areas. This is the first report of exposure of free-living jaguars to N. caninum and S. neurona.