Data/hora: 19/06/2024 05:35:49

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 29/05/2003
Data da última atualização: | 29/05/2003
Autoria: | DAVILA, A. M. R.; SILVA, R. A. M. S.
Afiliação: | EMBRAPA Pantanal (Corumba, MS).
Título: | Seroprevalence of Trypanosoma evansi in equines from the Nhecolandia subregion of the Pantanal.
Ano de publicação: | 1997
Fonte/Imprenta: | Memorias do Instituto Oswaldo Cruz, v.92, p.127, Nov. 1997. Supplement 1.
Idioma: | Inglês
Conteúdo: | Equine trypanosomiasis due to Trypasnosoma evansi is one of the most important protozoal diseases found in the Pantanal region of Brazil. This parasite infects a variety of mammals. In the Pantanal, it has been found in horses, coatis (Nasua nasua), dogs, small wild rodents (Oryzomys sp.) and capybaras (Hydrocaeris hydrochaeris). Diagnostic tools for a sensitive and early diagnostic are necessary to study and understand the epizootiology of this protozoal disease in the Pantanal. A survey to assess the prevalence of T. evansi in equines was carried out at the beginning of July on a ranch located in the Nhecolandia sub-region of the Pantanal. Three hundred and seventy-two animals were bled using a vacuum system. In this preliminary study, a total of 244 sera samples were tested using the indirect Immunofluorescence Antibody Test (IFAT) for the diagnosis. The prevalence was 12,70% (31/244). The first 102 animals were examined for T. evansi using the microhematocrit centrifuge test (MHCT). The prevalence was 3.92% (4/102). Relative low prevalence may be obtained using MCHT for diagnosing in comparison to more accurate diagnostic tests. According to Monzon et al. (1990 Veterinary Parasitology 36:141-146) MHCT detected 71.1% of natural T. evansi infections in horses from the Formosa province, Argentina. Our prevalences are similar with those described in the literature. Franke et al. (1994 Acta tropica 58:159-169) found a T. evansi prevalence of 4.1% in 364 horses from the Pantanal of Pocone region using standard parasitological methods. On the other hand, using the IFAT, Monzon et al. (1988 Arq Bras Med Vet Zoot 40:279-285) reported a prevalence of 19.3% of T. evansi in horses from the Formosa department, Argentina, from 1983 to 1987. Although we are showing preliminary results, the IFAT appears be more sensitive than the MHCT. More sera samples are being tested and statistical analysis are being done in order to obtain prevalence of T. evansi according to sex, age and race.
Palavras-Chave: | Disease; Equine; Infestation; Nhecolandia; Parasita; Parasite.
Thesagro: | Doença; Eqüino; Infestação.
Thesaurus Nal: | Brazil; Pantanal; Trypanosoma evansi.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (53355-1) - UPC - SP - -- - SP16466 -  - 16466-8 - DIS