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ABORTO POR Neospora caninum EN REBA 1OS BOVINOS DE RAZA CARORA EN VENEZUELA
No full textNeospora caninum es un protozoo par\ue1sito intracelular considerado en la actualidad como una de las principales causas de aborto en vacuno, en sistemas de producci\uf3n de leche y carne de todo el mundo. En Venezuela, se han realizado pocos estudios en los que se relacione la ocurrencia de aborto, seropositividad y la confirmaci\uf3n de infecci\uf3n por Neospora caninun en fetos abortados mediante t\ue9cnicas de biolog\ueda molecular. El objetivo del presente estudio fue evaluar la seropositividad frente a Neospora caninum en diferentes fincas de raza Carora en Venezuela y determinar su relaci\uf3n con la ocurrencia de abortos causados por este agente etiol\uf3gico diagnosticado mediante estudios histol\uf3gicos y moleculares en fetos abortados recolectados en las fincas. Los seis reba\uf1os analizados presentaron alg\ufan animal con anticuerpos frente a Neospora caninum, con una positividad total del 28,1%. La evaluaci\uf3n de los fetos abortados mediante t\ue9cnicas histol\uf3gicas y PCR espec\uedfica frente a Neospora caninum, permiti\uf3 confirmar al par\ue1sito como causa de aborto en dichas fincas. Finalmente, los resultados confirman la importancia de la neosporosis en Venezuela, y los datos obtenidos fundamentan la inclusi\uf3n de esta enfermedad en el diagn\uf3stico de enfermedades que cursan con aborto en Venezuela, y la aplicaci\uf3n de medidas de control.
Palabras claves: aborto, bovino, fetos, Neospora caninun, seropositividad.
ABTRACT
Neospora caninum is an intracellular protozoan parasite considered nowa\uaddays as one of the main causes of cattle abortion in systems of milk and meat production around the world. In Venezuela few studies have been made in which is related the occurrence of abortion, seropositivity and the confirmed infection by Neospora caninum in aborted fetus through molecular biology techniques. The goal of this study was to evaluate the seropositivity against Neospora caninum in different farms of Carora breed in Venezuela, and to determine its relation with the occurrence of abortions caused by this etiolo\uadgic agent, diagnosed through molecular and histological studies of aborted fetuses in those farms. The six herds analyzed showed an animal with anti\uadbodies against Neospora caninum with a total positivity of 28.1%. The eva\uadluation of aborted fetuses through histological techniques and specific PCR for Neospora caninum allowed confirming the parasite as cause of abortion in those farms. Finally, the results confirm the importance of neosporosis in Venezuela, and the data obtained sustains the inclusion of this disease in the diagnosis of diseases that occurs with abortion in Venezuela, and the appli\uadcation of control measures.
Keywords: Neospora caninum, Fetus, Bovines, abortion, seropositivity.
RESUMO
Neospora caninum \ue9 um protozoo parasita intracelular conceituado na atua\uadlidade como uma das principais causas de aborto em vacuno em sistemas de produ\ue7\ue3o de leite e carne de todo mundo. Em Venezuela, realizaram-se pou\uadcos estudos nos que se relacione a ocorr\ueancia de aborto, seropositividad e a confirma\ue7\ue3o de infec\ue7\ue3o por Neospora caninum em fetos abortados median\uadte t\ue9cnicas de biologia molecular. O objetivo do presente estudo foi avaliar a seropositividad em frente a Neospora caninum em diferentes fincas de ra\ue7a Carora em Venezuela e determinar sua rela\ue7\ue3o com a ocorr\ueancia de abortos causados por este agente etiol\uf3gico diagnosticado mediante estudos histo\uadl\uf3gicos e moleculares em fetos abortados coletados em ditas fincas. Os seis rebanhos analisados apresentaram algum animal com anticuerpos em frente a Neospora caninum, com uma positividad total de 28,1%. A avalia\ue7\ue3o dos fetos abortados mediante t\ue9cnicas histol\uf3gicas e PCR espec\uedfica em frente a Neospora caninum,, permitiu confirmar ao parasita como causa de abor\uadto em ditas fincas. Finalmente, os resultados confirmam a import\ue2ncia da neosporosis em Venezuela, e os dados obtidos fundamentam a inclus\ue3o desta doen\ue7a no diagn\uf3stico de doen\ue7as que cursan com aborto em Venezuela, e o aplicativo de medidas de controle.
Palavras-chave: aborto, gado, fetos, Neospora caninum, seropositividade. <br
Huertos escolares – familiares una estrategia pedagógica para la interdisciplinariedad curricular en los estudiantes de quinto grado de la sede de San Antonio de la Institución Educativa Agropecuaria de El Guamo, Bolívar.
No full textEste proyecto tiene como objeto reconocer caracterizaciones tanto territoriales como histórico culturales, en las cuales están inmersas las
realidades de los actores participantes de la problemática de investigación, enmarcada en la necesidad de visionar acciones de intervención donde la práctica propia de su contexto como la construcción de huertas escolares con un radio acción hacia los núcleos familiares de los estudiantes, sirva de escenario para la construcción de una propuesta interdisciplinar en la cual se
comprometen tanto educandos como docentes, administrativos y padres de familia aterrizando en la formulación de una preguntas de investigación que a su vez marcan la ruta para la construcción de unos propósitos investigativos que a su vez se convierten en las metas hacia donde se desea llegar con el proceso investigativo.
De igual forma, la investigación se centró en la aplicación de un tipo de investigación acción educativa y pedagógica, en la cual los maestrantes se incorporaron en las realidades de la ruralidad de la escuela siendo piezas de dicho proceso.MaestríaMagíster en Educació
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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