Evaluation of clinical signs, parasitemia, hematologic and biochemical changes in cattle experimentally infected with Trypanosoma vivax

摘要: Infections by Trypanosoma vivax cause great losses to livestock in Africa and Central South Americas. Outbreaks due this parasite have been occurred with increasing frequency Brazil. Knowledge of changes caused T. during the course disease can be diagnostic value. Thus, clinical signs, parasitemia, hematologic biochemical cattle experimentally infected hemoparasite were evaluated. Two distinct phases verified infection - an acute phase where circulating parasites seen then a chronic fluctuations parasitemia detected including aparasitemic periods. A constant reduction erythrocytes, hemoglobin packed cell volume (PVC) observed. White blood cells (WBC) showed pronounced such as severe neutropenia lymphopenia illness. Decreases cholesterol, albumin, aspartate aminotransferase (AST), lactate dehydrogenase (LDH), increases glucose, globulin, protein, alkaline phosphatase (ALP) The "Lins" isolate pathogenicity for cattle, intense was early stages infection. Circulating about two months. most evident laboratory abnormalities found WBC parameters, thrombocytopenia.