Data/hora: 05/06/2024 11:12:59

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 11/09/1997
Data da última atualização: | 11/09/1997
Autoria: | SILVA, R. A. M. S.; DAVILA, A. M. R.; AROSEMENA, N. A. E.
Afiliação: | EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS).
Título: | Outbreak of equine Trypanosomosis due to Trypanosoma evansi in the Pantanal, Brazil.
Ano de publicação: | 1995
Fonte/Imprenta: | Memorias do Instituto Oswaldo Cruz, Rio de Janeiro, v.90, p.297, 1995. Suplemento 1.
Idioma: | Inglês
Conteúdo: | The Pantanal is a wetland with an area of 140.000 km2, located in the centre of South America. The Pantanal can be considered one of the moswt important livestock production centers in Brazil. T. evansi probably was introduced into the region the 16 th century by Spanish settlers. However we are reporting here for the first time trypanosomosis due to T. evansi in horses of Pantanal. In February 1994 an outbreak of equine trypanosomosis occurred in a ranch with forty-eight dead horses (51%). The clinical signs observed were fever, anemia, conjunctivitis, edema of the legs and lower parts of the body, progressive weakness a gradual onset of paresis of hind quarters, loss of condition and inappetence. The diagnosis was confirmed by morphological and biometrical studies. The animals were bled for determination of hematological data using a vacuum system in tubes EDTA as anti-coagulant. The T. evansi morphological and biometrical data were obtained from blood sears of naturally infected horses. The blood smears were examined after staining with May-Gruenwald-Giemsa. The isolates were identified based on morphological and biometrical data. The blood values observed were: 3.65 x 10 6 RBC, 6.92 x 10 3 WBC, 18% PCV, 5.53g/dl Hb, 15.15 pg mean corpuscular hemoglobin and 30.72% mean corpuscular hemoglobin concentration. The differential white cell counts were: 6.6% neutrophil, 60.2% lymphocyte, 29% monocyte, 4.2% eosinophi. In our study the infected animalsshoweda marked decrease in RBC, Hb and PCV. The increase in absolute lymphocyte count observed in sick horses has been reported in trypanosomosis by T. evansi and infections caused by other trypanosomes. Measurements of T. evansi of equines from Pantanal, Brazil, means +- SE (mm)(n=100).
Palavras-Chave: | Equine.
Thesagro: | Eqüino.
Thesaurus Nal: | Brazil; Pantanal; Trypanosoma evansi.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (34850-1) - UPC - AP - -- - AP614.405 -  - 614.405 - DIS