Navegando por Assunto "Trypanosoma evansi"

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Acesso aberto (Open Access)
Molecular detection of Trypanosoma evansi (Kinetoplastida: Trypanosomatidae) in procyonids (Carnivora: Procyonidae) in Eastern Amazon, Brazil
(Universidade Federal do Pará, 2016-04) MATOS, Paulo Cesar Magalhães; SANTOS, Rafaelle Cunha dos; SOUZA, Paulo Geovani Silva; SAMPAIO JUNIOR, Francisco Dantas; MOURÃO, Fábio Rodrigo Paixão; OLIVEIRA, Wanessa Batista Lima; GABRIEL, Áurea Martins; GONZALEZ MONTEIRO, Silvia; CAVALCANTE, Gustavo Góes; SCOFIELD, Alessandra; BARROS, Flávia de Nazaré Leite
The present study aimed to diagnose the natural infection of captive and free-living procyonids with Trypanosoma evansi in the states of Amapá and Pará, Brazil. From February 2012 to August 2013, whole blood samples and blood smears were obtained from 45 free-living procyonids and from nine procyonids kept in captivity in wild life refuges and zoobotanical parks in the states of Amapá and Pará. Whole blood samples were collected and kept at -20ºC for the detection of T. evansi DNA by PCR using the RoTat 1.2 forward and RoTat 1.2 reverse primers. In addition, the blood smears were processed and examined for the presence of trypomastigote forms of T. evansi. T. evansi DNA was detected in 18.52% (10/54) of the procyonids, namely, in captive crab-eating raccoons and captive and free-living coatis in Pará State. No trypomastigote forms were observed in the blood smears. DNA from T. evansi was detected in P. cancrivorus and N. nasua in Pará State, being this the first such report in P. cancrivorus.
Acesso aberto (Open Access)
Reemerging of natural infection by Trypanosoma evansi in horses in Arari, Marajó Island, Brazil
(Universidade Federal do Pará, 2016-12) SILVA, Josileide Araújo da; DOMICIANO, Tarcísio Oliveira; MONTÃO, Daniele Pina; SOUSA, Paulo Geovani Silva; RAMOS, Leandro Lopes; PAREDES, Laura Jamille Argolo; GONZALEZ MONTEIRO, Silvia; RIVERO, Beatriz Riet Correa; SCOFIELD, Alessandra; BEZERRA JÚNIOR, Pedro; BEZERRA, Isis Abel; CERQUEIRA, Valíria Duarte
Two outbreaks of trypanosomiasis by Trypanosoma evansi in horses in the municipality of Chaves, Marajó Island, Pará State, Brazil are reported. The first outbreak occurred in April 2011 in a farm with 147 horses; of these, 47 (31.97%) got sick, and 40 (27.21%) died. The second outbreak occurred in May 2012 and involved nine properties. Of a total of 679 horses, 209 (30.07%) got sick, and 183 (26.97%) died. The main clinical signs observed in these horses were weight loss, abdominal edema, toe dragging, and pelvic muscle atrophy. Necropsy was performed in two horses, one from each outbreak. Macroscopic alterations were not seen in the horse from the first outbreak; however, the horse from the second outbreak exhibited emaciation, pallor and icterus, as well as enlarged spleen with prominent white pulp at cut surface. Histopathology of the central nervous system of both animals revealed mild to severe, diffuse lymphoplasmacytic encephalitis, with presence of Mott cells. Immunohistochemistry for T. evansi revealed structures similar to intralesional trypomastigote forms. Between November and December of 2013, an epidemiological survey was carried out in the municipalities of Cachoeira do Arari, Santa Cruz do Arari, Salvaterra, Soure, and Chaves. Only Santa Cruz do Arari and Chaves had reported cases of the disease. Blood samples were collected from 243 horses for detection of T. evansi DNA by polymerase chain reaction (PCR) and 20 were positive.