The effect of the quality of roughage on the course of Trypanosoma vivax infection in West African dwarf goats

Dam, J.T.P. van; Hofs, P.; Tolkamp, B.J.; Zwart, D.

doi:10.1016/s0301-6226(97)00128-0

Cited by 7 publications

(2 citation statements)

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“…They alternated between normal and hyperproteinemia. Other authors have seen similar behavior for total protein and its fractions including decreased albumin, increased globulin and total protein normal to increased (KATUNGUKA-RWAKISHAYA, 1996;SCHENK et al, 2001;SEKONI et al, 1990; VAN DAM et al, 1998). Schenk et al (2001) observed a decrease in total protein and albumin values at 4 and 8 DAI, respectively, and a significant increase in gamma globulin values from 12 DAI.…”

Section: Evaluation Of Cattle Experimentally Infected With T Vivaxsupporting

confidence: 55%

“…This showed possible nutrient intake by trypanosomes (BOERO, 1974). Other authors had the same results (KATUNGUKA-RWAKISHAYA, 1996; VAN DAM et al, 1998;ALMEIDA, 2007). Kadima et al (2000) and Batista et al (2008) evaluated cattle and goats experimentally infected with T. vivax, respectively, obtained glucose values below the reference range and noted a significant reduction versus the control group.…”

Section: Evaluation Of Cattle Experimentally Infected With T Vivaxmentioning

confidence: 58%

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

Fidélis

Sampaio

Machado

et al. 2016

Rev. Bras. Parasitol. Vet.

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Infections by Trypanosoma vivax cause great losses to livestock in Africa and Central and South Americas. Outbreaks due this parasite have been occurred with increasing frequency in Brazil. Knowledge of changes caused by T. vivax during the course of this disease can be of great diagnostic value. Thus, clinical signs, parasitemia, hematologic and biochemical changes of cattle experimentally infected by this hemoparasite were evaluated. Two distinct phases were verified during the infection -an acute phase where circulating parasites were seen and then a chronic phase where fluctuations in parasitemia were detected including aparasitemic periods. A constant reduction in erythrocytes, hemoglobin and packed cell volume (PVC) were observed. White blood cells (WBC) showed pronounced changes such as severe neutropenia and lymphopenia during the acute phase of the illness. Decreases in cholesterol, albumin, aspartate aminotransferase (AST), lactate dehydrogenase (LDH), and increases in glucose, globulin, protein, and alkaline phosphatase (ALP) were observed. The "Lins" isolate of T. vivax showed pathogenicity for cattle, and intense parasitemia was detected in the early stages of infection. Circulating parasites were detected for about two months. The most evident laboratory abnormalities were found in WBC parameters, including thrombocytopenia.Keywords: Trypanosomiasis, bovine, host-parasite relationship, complete blood count. ResumoInfecções pelo Trypanosoma vivax causam grandes prejuízos à pecuária na África e Américas Central e do Sul. Surtos devido a este protozoário têm ocorrido com frequência cada vez maior no Brasil. O conhecimento das alterações provocadas pelo T. vivax durante a evolução desta enfermidade podem ser de grande valia para o auxílio no diagnóstico. Para tanto foram estudados os sinais clínicos, parasitemia, alterações hematológicas e bioquímicas em bovinos experimentalmente infectados por este hemoparasito. Foram verificadas duas fases distintas durante a infecção, uma aguda onde parasitos circulantes foram vistos durante todo o período, e posteriormente uma crônica, onde foram detectadas flutuações na parasitemia, com períodos aparasitêmicos. Foi verificada constante diminuição da contagem global de eritrócitos, teor de hemoglobina e volume globular (VG). O leucograma revelou leucopenia por neutropenia e linfopenia durante a fase aguda da enfermidade. Foram observados diminuição do colesterol, albumina, aspartato aminotransferase (AST), lactato desidrogenase (LDH) e aumento da glicose, globulinas, proteínas e fosfatase alcalina (FA). O isolado "Lins" de T. vivax apresentou patogenicidade para bovinos, verificando-se parasitemia intensa nos estágios iniciais da infecção, sendo detectados parasitas circulantes por aproximadamente dois meses. As alterações laboratoriais mais evidentes foram encontradas nos parâmetros do leucograma, ainda destacando-se um quadro de trombocitopenia.Palavras-chave: Tripanossomíase, bovino, relação parasita-hospedeiro, hemograma.

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Section: Evaluation Of Cattle Experimentally Infected With T Vivaxsupporting

confidence: 55%

Section: Evaluation Of Cattle Experimentally Infected With T Vivaxmentioning

confidence: 58%

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

Fidélis

Sampaio

Machado

et al. 2016

Rev. Bras. Parasitol. Vet.

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Is anorexia during infection in animals affected by food composition?

Kyriazakis

2010

Animal Feed Science and Technology

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