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Search Results: 1 - 10 of 351843 matches for " Andrés Javier; Diana Marcela "
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Frecuencia de los genotipos babA2, oipA y cagE de Helicobacter pylori en pacientes colombianos con enfermedades gastroduodenales
Quiroga,Andrés Javier; Diana Marcela,Cittelly; Bravo,María Mercedes;
Biomédica , 2005,
Abstract: introduction. helicobacter pylori infection is associated with the development of several gastroduodenal diseases. bacterial virulence genes have been found associated with an increased risk for gastric disease. objectives. herein, associations were made between the presence of vaca, caga, cage, baba2 and oipa genes in h. pylori isolates and the range of clinical consequences of the infection. methods. pcr was used to amplify vaca, caga, cage, baba2 and oipa genes in 166 isolates- 50 patients with peptic ulcer, 39 with non-atrophic gastritis, 26 with atrophic gastritis, 26 with intestinal metaplasia and 25 with gastric adenocarcinoma. results. caga, cage, baba2 and oipa genes were found in 73%, 75%, 48% and 74% of isolates, respectively. the cytotoxic vaca s1m1/ caga positive/ cage positive genotype was present in 64% (100/157) of isolates. a higher frequency of cytotoxic strains was observed in cancer patients (84%), intestinal metaplasia (91%) and peptic ulcer (81%) in comparison with gastritis patients (50%) (p=0.002, 0.008, 0.007, respectively). the oipa and baba2 frequency was higher in cytotoxic isolates than in non-cytotoxic isolates ( oipa: 81% vs. 52%, p=0,003; baba2: 58% vs. 12% (p<0.001). no significant association was found among clinical outcomes and oipa or baba2 genotypes, analyzed alone or in combination with vaca and caga. conclusion. therefore, baba2 or oipa genes are not marker indicators of ulcer or cancer.
Las enfermedades infecciosas y su importancia en el sector avícola
Jaimes-Olaya,Javier Andrés; Gómez Ramírez,Arlen Patricia; álvarez Espejo,Diana Claudia Marcela; Soler Tovar,Diego; Romero Prada,Jaime Ricardo; Villamil Jiménez,Luís Carlos;
Revista de Medicina Veterinaria , 2010,
Abstract: poultry industry has become one of the most promising and fastest growing in colombia, within the context of a country whose best skills are in the agricultural sector. for this reason, programs currently being implemented to improve the quality of poultry products, with the aim not only to maintain the growth of the industry but to expand the frontiers to export. however, the poultry industry faces a great challenge to production level, because infectious diseases affecting birds continue to be the major headache of the sector, even over food and genetics. this article presents relevant elements concerning the poultry industry as well as official control infectious diseases and some infectious diseases that afflict more, emphasizing the importance of the intervention for managing and controlling such diseases.
FPGA compression of ECG signals by using modified convolution scheme of the Discrete Wavelet Transform
Ballesteros,Dora M; Moreno,Diana Marcela; Gaona,Andrés E;
Ingeniare. Revista chilena de ingeniería , 2012, DOI: 10.4067/S0718-33052012000100002
Abstract: this paper presents fpga design of ecg compression by using the discrete wavelet transform (dwt) and one lossless encoding method. unlike the classical works based on off-line mode, the current work allows the real-time processing of the ecg signal to reduce the redundant information. a model is developed for a fixed-point convolution scheme which has a good performance in relation to the throughput, the latency, the maximum frequency of operation and the quality of the compressed signal. the quantization of the coefficients of the filters and the selected fixed-threshold give a low error in relation to clinical applications.
FPGA compression of ECG signals by using modified convolution scheme of the Discrete Wavelet Transform Compresión de se ales ECG sobre FPGA utilizando un esquema modificado de convolución de la Transformada Wavelet Discreta
Dora M Ballesteros,Diana Marcela Moreno,Andrés E Gaona
Ingeniare : Revista Chilena de Ingeniería , 2012,
Abstract: This paper presents FPGA design of ECG compression by using the Discrete Wavelet Transform (DWT) and one lossless encoding method. Unlike the classical works based on off-line mode, the current work allows the real-time processing of the ECG signal to reduce the redundant information. A model is developed for a fixed-point convolution scheme which has a good performance in relation to the throughput, the latency, the maximum frequency of operation and the quality of the compressed signal. The quantization of the coefficients of the filters and the selected fixed-threshold give a low error in relation to clinical applications. Este documento presenta el dise o basado en FPGA para la compresión de se ales ECG utilizando la Transformada Wavelet Discreta y un método de codificación sin pérdida de información. A diferencia de los trabajos clásicos para modo off-line, el trabajo actual permite la compresión en tiempo real de la se al ECG por medio de la reducción de la información redundante. Se propone un modelo para el esquema de convolución en formato punto fijo, el cual tiene buen desempe o en relación a la tasa de salida, la latencia del sistema, la máxima frecuencia de operación y la calidad de la se al comprimida. La arquitectura propuesta, la cuantización utilizada y el método de codificación proporcionan un PRD que es apto para el análisis clínico.
Descriptive study about acute myocardial infarction in Hospital de Caldas, 1996-2002
Bedoya Tatiana,Díez Diana Inés,Loaiza Julián Andrés,Valencia Johanna Marcela
Colombia Médica , 2004,
Abstract: Introduction: The cardiovascular diseases make today the first cause of death, being the most representative the isquemic cardiopathy and the acute myocardial infarction (IMA); therefore it is considered of high importance to find out the intrahospital mortality incidence caused by this pathology, in the Hospital de Caldas ESE, Manizales, Colombia, for being a reference center at regional scale, complementing former studies made in this same center. Objectives: The objectives of the present study were to describe the general characteristics of the acute myocardial infarction (IMA), analyze how do the risk factors repercute on it, to identify the time of in hospital permanency, frequency of IMA in both sexes and the degree of mortality according to the localization of IMA. Material and methods: A retrospective analysis of 784 clinical histories from the statistic service of the Hospital de Caldas ESE of IMA patients was made between the years 1996-2002; 686 clinical histories were analyzed by evaluating demographic variables, IMA details and some risk factors. The following variables were evaluated: age, sex, origin, pain type, cardiac enzymes, electrocardiogram, mortality, topographical localization of IMA, family history, personal history of diabetes mellitus, arterial hypertension, tabaquism, previous IMA and time of hospitalization. Results: In this study a mortality of 14.7% was found (7.7% men and 7% women). 122 cases of atypical pain were presented from which 40 represented the diabetic population. The bigger mortality was found in the first seven days of hospitalization. There is a significant statistical difference (p= 0.0001) between the average age of IMA presentation comparing both sexes, being more frequently its presentation in women of advanced ages (64 years) than in men (59 years). Conclusions: The incidence of IMA has increased in women presented by higher precocious mortality and being more frequent in women older than 64 years and man older than 59 years.
PUBLICACIóN INTERNACIONAL DE PATENTES POR ORGANIZACIONES INVENTORES DE ORIGEN COLOMBIANO
Sánchez,Jenny Marcela; Medina,Javier E; León,Andrés Mauricio;
Cuadernos de Economía , 2007,
Abstract: the need for promoting patent requests and their subsequent marketing has emerged from the question of how colombia can become part of the socioeconomics of know-how (i.e. able to compete globally via networking, emphasising intensive know-how products and services). this article analyses the record of colombian institutions or inventors? patents in us and european patent offices? databases from 1968 to 2007. it should be stressed that colombia is far removed from developed countries and even from some neighbouring countries, such as mexico or brazil.
PUBLICACIóN INTERNACIONAL DE PATENTES POR ORGANIZACIONES E INVENTORES DE ORIGEN COLOMBIANO
Sánchez Jenny Marcela,Medina Javier E.,León Andrés Mauricio
Cuadernos de Economía , 2007,
Abstract: Ante la cuestión de cómo podría Colombia hacer parte de la Socioeconomía del Conocimiento, es decir, ser capaz de competir globalmente, en red y con énfasis en productos y servicios intensivos en conocimiento, surge la necesidad de impulsar la solicitud de patentes y su posterior comercialización. El artículo presenta un análisis del registro de patentes por arte de instituciones o inventores colombianos, en las bases de datos de as Oficinas de Patentes de Estados Unidos y Europa, entre 1968 y 2007. se observa que Colombia se encuentra muy distante de países desarrollados, e incluso de algunos de nuestro entorno, como México o Brasil.
Colonización del tracto digestivo en ni os después de infección por gérmenes productores de betalactamasas de espectro extendido y tratamiento con carbapenems, estudio prospectivo Gastrointestinal tract colonization in children after infection by extendedspectrum beta-lactamase producing bacteria and treatment with carbapenems: prospective study
Diego Andrés Rodríguez,Marcela del Pilar Pérez,Fernando Sarmiento,Javier Díaz
Infectio , 2011,
Abstract: Antecedentes. La colonización del tracto digestivo parece ser un factor de riesgo para presentar infección por microorganismos productores de betalactamasas de espectro extendido (BLEE), que puede persistir por un tiempo aún no determinado luego del tratamiento adecuado. Esta condición no ha sido suficientemente estudiada y su conocimiento es pobre. Objetivo. Determinar la persistencia de bacterias productoras de BLEE en el tracto digestivo después de un tratamiento antibiótico racional. Materiales y métodos. Se llevó a cabo un estudio prospectivo y descriptivo. En un periodo de 12 meses, se incluyeron todos los pacientes que habían presentado un cultivo positivo en cualquier muestra para Eschericia coli o Klebsiella pneumoniae productores de BLEE y que, además, habían recibido tratamiento con meropenem. Se tomaron coprocultivos de seguimiento a los 7, 14 y 30 días de iniciado el antibiótico. Resultados. De 80 pacientes con cultivo positivo para gérmenes BLEE, 47 tuvieron tratamiento con meropenem. De ellos, 10 (21,3 %) fueron positivos en coprocultivo a los siete días de iniciado el tratamiento, 4 (8,5 %) a los 14 días y ninguno a las cuatro semanas después del tratamiento. El germen más frecuente fue K. pneumoniae (60 %). Conclusiones. El tracto digestivo de los ni os se comporta como un reservorio transitorio de gérmenes BLEE, y puede ser el foco de infección y contaminación para el personal asistencial y otros pacientes durante un periodo crítico de, al menos, dos semanas. La tasa de erradicación de la colonización al mes de tratamiento con meropenem, fue de 100 %. Introduction: Gastrointestinal tract colonization seems to be a risk factor for acquiring an infection by extended-spectrum beta-lactamase (ESBL) producing bacteria. Time colonization has not been established yet, this condition has not been analyzed enough, and evidence is poor. Objective: The aim of this study was to determine the incidence of gastrointestinal tract colonization after an antibiotic therapy. Patients and methods: This was a one-year prospective descriptive study of patients who had cultures with ESBL-producing enterobacteriaceae (Klebsiella pneumonia or Escherichia coli) and received treatment with meropenem. In order to detect potential reservoirs for ESBL producing bacteria, stool cultures were done on days 7, 14 and 30 after initiating the antibiotic treatment. Results: During the study period, we included 80 cases, of which 47 received meropenem, and stool cultures were performed in these cases. There was gastrointestinal tract colonization by ESBL-producing bacteria
Colonización del tracto digestivo en ni?os después de infección por gérmenes productores de betalactamasas de espectro extendido y tratamiento con carbapenems, estudio prospectivo
Rodríguez,Diego Andrés; Pérez,Marcela del Pilar; Sarmiento,Fernando; Díaz,Javier; Ruiz,Ariel Iván;
Infectio , 2011,
Abstract: introduction: gastrointestinal tract colonization seems to be a risk factor for acquiring an infection by extended-spectrum beta-lactamase (esbl) producing bacteria. time colonization has not been established yet, this condition has not been analyzed enough, and evidence is poor. objective: the aim of this study was to determine the incidence of gastrointestinal tract colonization after an antibiotic therapy. patients and methods: this was a one-year prospective descriptive study of patients who had cultures with esbl-producing enterobacteriaceae (klebsiella pneumonia or escherichia coli) and received treatment with meropenem. in order to detect potential reservoirs for esbl producing bacteria, stool cultures were done on days 7, 14 and 30 after initiating the antibiotic treatment. results: during the study period, we included 80 cases, of which 47 received meropenem, and stool cultures were performed in these cases. there was gastrointestinal tract colonization by esbl-producing bacteria in 21.3% (10) on day 7 of treatment, 8.5% (4) on day 14, and none on day 30. k. pneumonia, being the most frequent, was found in 60% of cultures. conclusions: the gastrointestinal tract in children acts as a temporary reservoir for esbl-producing bacteria and could be an infection and contamination source to medical staff and other patients during a critical period of at least two weeks. 100% of gastrointestinal tract colonization was eradicated after treatment with meropenem.
Aspectos determinantes en la presentación de la enfermedad infecciosa de la bursa
Jaimes-Olaya,Javier Andrés; álvarez Espejo,Diana Claudia; Correa,Jairo Jaime; Vera Alfonso,Víctor Julio;
Revista de Medicina Veterinaria , 2009,
Abstract: the infectious bursal disease or gumboro disease is an immunosuppressive pathology of birds, which has great importance in the poultry industry due to large economic losses that it produces not only for its direct effect, but because of the susceptibility to secondary infections, interference with commercial vaccines, reducing the effective use of them. the disease is produced by the infectious bursal disease virus (ibdv), which is an rna genome birnavirus, with high capacity for mutation, so the agent is continually evolving. the pathology has three types of clinical presentation: a subclinical form, a mild or moderate clinical form and a severe clinical form. however, the type of manifestation is determined mainly by three factors: the age of birds at the time of infection, the type of strain or acting or genetic variability of it, and the immunity degree. in this article, we discuss each of these factors and their importance in the presentation of the disease. these elements are vital in order to establish effective prevention and control programs.
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