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      Clasificación morfológica de la anemia en vacunos mestizos de doble propósito criados en una zona de bosque seco tropical Translated title: Morphological classification of anaemia in dual purpose cattle breeding in a forest dry tropical zone

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          Abstract

          El objetivo de este trabajo fue determinar la prevalencia de los diferentes tipos anemia morfológica en vacunos doble propósito, así como establecer su relación con el sistema de producción, edad y sexo de los animales. El estudio se realizó durante los meses de octubre y noviembre correspondiente a la salida de lluvias, en 383 vacunos procedentes de seis fincas caracterizadas como Sistema 1: doble propósito tendencia a la especialización en leche (DPTL) y 2: doble propósito tendencia a la producción de carne (DPTC). Los animales fueron clasificados cronológicamente en dos grupos: A < 2 años y B 2-10 años. Muestras de sangre fueron obtenidas de la vena yugular con tubos vacutainer utilizando EDTA como anticoagulante. Se evaluó: concentración de hemoglobina, hematocrito y el conteo de eritrocitos. A partir de estos se calcularon los índices hematimétricos. Los datos fueron analizados por ji-cuadrado con un nivel de significación preestablecido del 5%. Los resultados indican que existe una alta prevalencia de anemia (56,3%) con predominio de las microcíticas hipocrómicas (25,3%), seguidas de las normocíticas normocrómicas (20,6%) y en menor proporción las macrocíticas (10,4%). Los porcentajes de animales anémicos resultaron estadísticamente diferentes (P<0,05) siendo superiores en el sistema DPTC, en los animales entre 2-10 años y en las hembras. Se discute sobre la influencia de situaciones sanitarias, fisiológicas y nutricionales. Se concluye que factores como el sistema de producción, sexo y edad están asociados a la presencia de anemia.

          Translated abstract

          The objective of this work was to determine the prevalence of different morphological anemia types and its classification in bovine dual purpose, as well as to establish its relation with the exploitation system, the age and the sex of the animals. It was carried out within October and November, normally associated to the end of rainy period, in 383 bovine coming from six farms characterized with system 1: dual purpose tendency to the milk specialization (DPTL) and 2: dual purpose tendency to the meat production (DPTC). The animals were grouped chronologically in two classes: A < 2 years and B 2-10 years. Samples from blood were obtained from the jugular vein using vacutainer tubes with EDTA as the anticoagulant. Concentration of hemoglobin, packed cell volume, erythrocytes, mean corpuscular volume and mean corpuscular hemoglobin was evaluated. Data were analyzed by chi-square with a probability of 5%. Results indicate that there is a high prevalence of anemia (56,3%) with predominance of the hipochromic microcytic, followed of the normochromic normocytic and in smaller proportion the macrocytic. The percentage of anemic animals are different (P< 0,05) being superior in system DPTC, the animals between 2-10 years and in the females. It is discussed the influence of sanitary, physiological and nutritional situations. As a conclusion, conditions as the exploitation system, sex and the age are associated to the presence of anemia.

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          Veterinary Clinical Pathology

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            Descripción morfológica de Cotylophoron cotylophorum (Digenea: Paramphistomidae) hallado en bovinos de Rionegro, Antioquia, Colombia

            En Colombia se ha registrado la presencia de Paramphistomidae (Trematoda: Digenea) parasitando el rumen de bovinos de la costa Caribe, los Llanos Orientales y el suroccidente. En estas publicaciones se menciona la presencia y prevalencia de los paramfistómidos, pero todas carecen de la descripción morfológica de los digeneos. El hallazgo de paramfistómidos adultos en el rumen de ejemplares Bos taurus, procedentes del sector Llanogrande, en el municipio de Rionegro, Antioquia, motivó la presente investigación, con el propósito de describir los diferentes estadíos del parásito y establecer el estatus taxonómico específico. Del rumen de una hembra, Bos taurus, sacrificada en la Central Ganadera del municipio de Medellín, se extrajeron vivos 52 digeneos adultos. En el laboratorio se aislaron huevos que se incubaron hasta la obtención de miracidios. Con ellos se infectaron 50 moluscos Lymnaea truncatula. La morfología de los adultos y estadíos larvarios del paramfistómido permitió determinarlo como Cotylophoron cotylophorum. En L. truncatula se obtuvo una infección del 5.1 %. Con este registro se amplia la distribución geográfica y altitudinal del parásito a la región altoandina, noroccidental de Colombia.
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              Bovine trypanosomiasis: the red cell kinetics of ndama and Zebu cattle infected with Trypanosoma congolense.

              The responses of susceptible Ndama and Zebu cattle to needle challenge with Trypanosoma congolense were followed using parasitological, haematological and radio-isotopic methods and compared with those of corresponding uninfected animals. In both breeds, infection became patent at the same time but peak parasitaemias were significantly lower, were attained later and were of short duration in the Ndama. All infected animals became anaemic, the severity of which correlated with the level and duration of parasitaemia. However, even when parasites could no longer be detected in the blood, packed cell volumes showed little tendency to recover. The anaemia was due to increased intravascular red cell destruction and was more pronounced in the Zebu. Haemodilution was not a feature. Increased red cell syntheisis occurred in infected animals of both breeds but particularly in the Zebu; this accounted for the capacity to maintain packed cell volume levels following the initial drop associated with parasitaemia. However, in most cases red cell synthesis was less than expected from the degree of anaemia, suggesting impairment of bone marrow function. Measurement of red cell iron utilization indicated that this was due to effective from re-utilization from degraded red cells arising from reticulo-endothelial blockade. It is concluded that the anaemia in this disease and its underlying processes are broadly in line with the number of parasites in the blood and that the superior resistance of the Ndama cattle lies in their ability to control parasitaemia rather than their capacity to mount a more efficient erythropoietic response.
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                Author and article information

                Journal
                zt
                Zootecnia Tropical
                Zootecnia Trop.
                Instituto Nacional de Investigaciones Agricolas INIA, Maracay, Venezuela. (Maracay, Aragua, Venezuela )
                0798-7269
                December 2010
                : 28
                : 4
                : 535-544
                Affiliations
                [02] Maracay Aragua orgnameInstituto Nacional de Investigaciones Agrícolas orgdiv1Centro Nacional de Investigaciones Agrícolas Venezuela
                [01] Yaracuy orgnameInstituto Nacional de Investigaciones Agrícolas Venezuela
                [03] Yaracuy orgnameFundación Centro de Investigaciones CIEPE San Felipe Venezuela
                Article
                S0798-72692010000400010 S0798-7269(10)02800410
                140b7fab-1ec3-4255-82d5-ccecfd9cc7aa

                http://creativecommons.org/licenses/by/4.0/

                History
                : 28 April 2009
                : 06 December 2010
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 11, Pages: 10
                Product

                SciELO Venezuela

                Categories
                Artículos Científicos

                anemia,vacunos,sistema de producción,sexo,edad,bovine,production system,sex,age

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