Papers by LUIS GUILLERMO PALACIO BAENA
Revista De Economia E Sociologia Rural, 2023
Technology is an important tool to increase a company’s performance. Although there is literature... more Technology is an important tool to increase a company’s performance. Although there is literature related to the adoption of technology in dairy agribusinesses, information regarding the adoption and use of Apps for herd management is scarce. The objective was to explore the factors associated with the adoption of Apps in a sample of dairy agribusinesses. A structural analysis was conducted to evaluate the relationship between internal and external variables of the dairy agribusiness and the process of adoption, appropriation and use of Apps for herd management. The adoption of Apps in dairy herds can be explained by two constructs: Internal motivational factor and external motivational factor, where productivity improvement and receiving technical advice are the variables with the greatest impact.
Revista Colombiana …, 2011
Seven dairy cattle farms from eastern Antioquia were tested for mastitis in a cross-sectional stu... more Seven dairy cattle farms from eastern Antioquia were tested for mastitis in a cross-sectional study with a non-probabilistic convenience sampling procedure. Each udder quarter of 290 lactating cows was evaluated through the California Mastitis Test in order to determine the ...
Revista CEA
El objetivo de este estudio fue evaluar la aceptación tecnológica de una aplicación móvil para la... more El objetivo de este estudio fue evaluar la aceptación tecnológica de una aplicación móvil para la gestión de negocios lecheros e identificar los factores que influencian la intención y frecuencia de uso de estas tecnologías en la industria lechera. Para la evaluación se seleccionó un modelo de aceptación tecnológica (TAM). Se aplicó una encuesta a 122 empresarios ganaderos, se calculó el TAM por el enfoque de mínimos cuadrados parciales y, para la frecuencia de uso, se utilizó una regresión logística ordenada. La mayor influencia encontrada sobre la intención de uso se debe a la utilidad percibida. El tamaño del negocio, además, aumentó significativamente la utilidad percibida. Por su parte, el volumen de producción de leche, la edad del empresario ganadero y su conocimiento previo de aplicaciones móviles para la gestión de negocios lecheros no influencian la utilidad o facilidad de uso percibidas. Igualmente se presentó evidencia de la influencia que tiene la educación sobre la fac...
Background: molecular markers for genetic resistance can be used to control mastitis in dairy cat... more Background: molecular markers for genetic resistance can be used to control mastitis in dairy cattle. The Major Histocompatibility Complex and the Toll-like receptor 4 (TLR4) are two promising genes that warrant investigation. Objective: to identify associations between genotypes of BoLA-DRB3 locus and T4CRBR2 fragment and subclinical mastitis (SM). Methods: 996 lactating cows from 32 herds comprising Holstein (80%), Holstein x Jersey cross (12.5%), and other crosses (7.5%) were evaluated monthly during two years, diagnosed for SM and genotyped for the second exon of BoLA DRB3 and the TLR4 coreceptor-binding region 2 (T4CRBR2) using a Polymerase chain reaction-restriction fragment length polymorphism technique (PCRRFLP). The association between candidate alleles and subclinical mastitis was measured by logistic regression. Results: the most frequently observed alleles for BoLA-DRB3 were DRB3.2 *8, *22, *24, *16, *10, *23, *gba, *11, *2, *mbb, *jba, *3, and *15, accounting for 58.9% ...
Asociación Colombiana de Neurología, 2008
Caracterización clínica y de conglomerados de clases latentes de la migraña familiar en el aislad... more Caracterización clínica y de conglomerados de clases latentes de la migraña familiar en el aislado genético de Antioquia Caracterización clínica y de conglomerados de clases latentes de la migraña familiar en el aislado genético de Antioquia Clinical and latent class cluster characteristics of familiar migraine in the antioquian genetic isolate
Epilepsia, 1998
A prospective series of 643 persons with epilepsy attending a reference neurologic center in Mede... more A prospective series of 643 persons with epilepsy attending a reference neurologic center in Medellin, Colombia, was examined by computed tomography (CT scan) or serology or both with the enzyme-linked immunoelectrotransfer blot assay (EITB) to assess the prevalence of Taenia solium cysticercosis. Methods: All presenting patients were consecutively enrolled in the study. Five hundred forty-six persons underwent cerebral CT scans; 376 of them also had serum EITB performed. Results: Prevalence of neurocys@ercosis by CT scan was 13.92%. Overall prevalence of T. solium antibodies with EITB was 9.82%, but for those with late-onset epilepsy (onset after
La Facultad de Ciencias Agrarias de la Universidad de Antioquia en su más de medio siglo de histo... more La Facultad de Ciencias Agrarias de la Universidad de Antioquia en su más de medio siglo de historia se ha dedicado a la formación de médicos veterinarios, zootecnistas y otros profesionales del sector agropecuario, lo cual le ha dado un impulso inusitado a este renglón económico en una región que se caracterizaba por la vocación minera, comercial e industrial. En el libro se contempla diversidad de temas, entre ellos el contexto socio-politico colombiano que permitió la creación de esta facultad, la evolución de los programas de estudio, los recursos físicos y, en especial, humanos que se destinaron a la formación de estos profesionales, sus logros académicos y científicos y la proyección hacia el futuro de esta unidad académica del Alma máter.
Revista Colombiana de Ciencias Pecuarias, 2012
Revista Colombiana de Ciencias Pecuarias, 2015
generado la injusta brecha existente entre sus indicadores sociales y económicos y los del sector... more generado la injusta brecha existente entre sus indicadores sociales y económicos y los del sector urbano colombiano. El campo ha sido el epicentro del conflicto armado durante muchos años. Los pobladores rurales han estado sometidos por décadas a la voluntad de diversos grupos al margen de la ley. Esos grupos-que en ocasiones se autodefinen como protectores de la población rural-han generado miseria, pobreza, muerte y desolación en nuestra población campesina indefensa. Ante la presión de las armas, multitud de campesinos han optado por abandonar su terruño. Muchos otros, sin tener a donde ir, han permanecido indefensos, destinados a morir laborando su parcela. Miles han sido cobardemente ajusticiados con una bala de fusil, destrozados por el estallido de un cilindro bomba, o en el mejor de los casos han sobrevivido, desmembrados, a la crueldad de las minas antipersona. Otros, para mantenerse con vida, no han tenido más opción que engrosar las filas de los violentos.
Revista de Neurología, 2001
To perform linkage analysis between the Short Tandem Repeats (STR) microsatellite markers D19S923... more To perform linkage analysis between the Short Tandem Repeats (STR) microsatellite markers D19S923, D19S929, D19S22, which are in strong genetic linkage to Notch3 gene in order to contrast the hypothesis that the vascular hereditary dementia phenotype described in a multigenerational extended pedigree from Colombia correspond to CADASIL (Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy). Even we know that using techniques as the Single Strand Conformational Polymorphisms (SSCP) could determine mutations in Notch3, the rationality of this approach is that intronic variations could not be defined and that we are interested in determine if some forms of the clinical presentation and its phenotypic variability make part of CADASIL. The CADASIL phenotype is caused by mutations in the Notch3 gene. Clinical features of CADASIL are: 1. Recurrent cerebra-vascular episodes; 2. Migraine history; 3. History of transitory ischemic attack and, 4. Behavior changes and dementia. By using SIMLINK we showed that the extended genealogy had the enough power to detect significant LOD (logarithm of oods) score values when Notch3 was considered the disorder cause. Linkage analysis was carried out by using parametric and non parametrical methods. The Elston-Stewart general method was used as the parametrical analysis and the sib pair method as the non-parametrical one. We perform simulations changing the affection status codification by including as affected or not including those individuals with migraine. Furthermore, in order to detect the stability of the results, we changed the penetrance values, the genetic frequencies on both, the marker loci and the affection locus. The maximum pair-wise LOD score was 2.04 which was detected at the marker D19S23 with q= 0.11cM. This distance correspond exactly with the Notch3 location. That is 100 times more probable that there is linkage that there is not. In other words this probability could be explained as if the phenotype correspond to CADASIL than to other vascular dementia. The non parametric results were compatibles with the parametric ones. When the migraine symptom was considered as a part of the affected status, the LOD score values showed not linkage. The results of the linkage analysis to these STR microsatellite markers suggest that the vascular hereditary dementia phenotype described in this family correspond to CADASIL caused by a polymorphism on the Notch3 gene. On the contrary, these same results suggest that the migraine phenotype is not a part of the progressive dementia.
Revista de Neurología, 2000
Discrimination and quantification of the environmental and genetic components involved in develop... more Discrimination and quantification of the environmental and genetic components involved in developing multiple sclerosis (MS) have not been made. In order to discriminate these components we have ascertained affected individuals by MS belonging to the Paisa community from Antioquia, Colombia, a state localized in the tropical area of South America, to detect eventual linkage disequilibrium to HLA, locus DQ alpha, which could demonstrate the relevance of the genetic component. A contingence analysis among case-control HLA DQ alpha genotype distributions, by using Monte Carlo resampling method to solve small number sample, showed that there are significant differences between the two groups. We observe that HLA DQ alpha 1.1, 1.2 allele frequencies were higher in the cases than in the controls. Also, there was significant HLA DQ alpha 3 allele lower frequency (p < 0.05) in the cases than in the controls. Similar results have been described in other Caucasian populations living in non tropical areas. Before results could indicate that the Caucasoid populations genetic component implied in the susceptibility to MS have remained in Paisa community, whether the environmental component, being meaningful to develop MS.
Revista de Neurología, 1999
“Proyecto piloto para mejorar la calidad de la leche mediante la implementacion de BPG (buenas pr... more “Proyecto piloto para mejorar la calidad de la leche mediante la implementacion de BPG (buenas practicas ganaderas) a traves de la transferencia de buenas practicas del Laboratorio Interprofesional Lechero y Agroalimentario de Asturias (LILA), Espana, a la region del Altiplano Norte Antioqueno”.
Revista Colombiana De Ciencias Pecuarias, 2012
Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto
Revista Mvz Cordoba, 2016
Objectives. To determine Neospora caninum seroprevalence in nonvaccinated dairy cattle from the N... more Objectives. To determine Neospora caninum seroprevalence in nonvaccinated dairy cattle from the Northern plains of Antioquia. Materials and methods . A cross-sectional study was conducted to determine the prevalence of neosporosis in a major dairy area of Colombia. Blood samples were collected from 1003 dairy cattle in 29 herds located in the municipality of San Pedro de los Milagros, in Antioquia. N. caninum antibody levels were measured by an enzymatic immunoassay (ELISA) and the results classified as positive or negative. Results . Seropositive cattle were observed in all herds, with a prevalence ranging from 7 to 97% and a mean (±S.E) of 37.1% (±4.2). The distribution of seropositive animals by age groups of <1, 1-2, 2-3 and ≥3 years old was 25.5, 30.3, 46.1 and 39.1%, respectively. Conclusions . There is a high seroprevalence of N. caninum in the main dairy cattle area of Antioquia. The large variation among herds suggests the presence of mayor risk factors whose identificat...
Objective. by regions in the hygienic and compositional quality of milk collected in a formal way... more Objective. by regions in the hygienic and compositional quality of milk collected in a formal way in Colombia between 2008-2019 associated with the issuance and entry into force of regulatory regulations. Materials and methods. 144 monthly reports on the hygienic and compositional quality of the milk collected formally were used for each of the milk-producing regions of Colombia consolidated by the USP-MADR. With these reports, three study periods were formed, separated by the entry into force of resolutions 017 of 2012 and 468 of 2015. The data obtained was analyzed
espanolLa brucelosis es un problema de salud publica en el ambito ocupacional de trabajadores rur... more espanolLa brucelosis es un problema de salud publica en el ambito ocupacional de trabajadores rurales y ejecutores de los programas de vacunacion de la enfermedad en el ganado. La exploracion de la positividad y de los factores asociados es necesaria para establecer medidas preventivas en esta poblacion trabajadora. El objetivo de este estudio fue determinar la seroprevalencia e incidencia de Brucelosis en vacunadores del programa para el control de Brucelosis bovina en el Departamento de Antioquia- Colombia. Se realizo un estudio de cohorte concurrente en vacunadores del programa para el control de brucelosis bovina, a quienes se les hizo seguimiento antes y despues del ciclo de vacunacion con el fin de determinar la seropositividad para brucelosis. Se estimo la positividad con dos pruebas inmunologicas diferentes: Rosa de Bengala y Elisa Competitivo. Para el primer muestreo de 251 personas, de quienes el 10.8% (IC95% 6.4 %-14.3%) fueron positivos a Rosa de Bengala. En el segundo m...
Summary The prevalence of bovine mastitis was evaluated in 4.260 udder quarts from 1.065 cows loc... more Summary The prevalence of bovine mastitis was evaluated in 4.260 udder quarts from 1.065 cows located in 15 cattle farms managed as dual purpose systems (beef and dairy) in Monteria (Cordoba, Colombia). The farms were chosen using a non-random probability sampling design. To isolate the microorganisms involved in mastitis, milk samples were taken from the quarts with trace reaction, as well as from sub-clinical or clinically affected quarts. A high percentage (92.21%) of isolated samples included infectious organisms. The main pathogen isolated was Staphylococcus aureus (87.56% of samples), while Streptococuss uberis, Corynebacterium bovis, Streptococcus agalactiae, and coagulase-negative Staphylococcus (SCN) were found in 3.60, 2.10, 2.10, and 0.3% of samples, respectively. We conclude that Staphylococcus aureus, the main etiological agent, is sensitive to antibiotics commonly used in the prevention and control of mastitis on dual purpose systems in this region. Key words: dual pu...
Revista MVZ Córdoba
Objetivo. Determinar la prevalencia de cetosis bovina según las concentraciones séricas (mMol/Lt)... more Objetivo. Determinar la prevalencia de cetosis bovina según las concentraciones séricas (mMol/Lt) de beta-hidroxibutirato (βHB) y estimar su asociación con enfermedades del posparto temprano en vacas lecheras. Materiales y métodos. Se realizó un estudio de corte transversal con información individual de los niveles sanguíneos de βHB y presentación clínica de enfermedades puerperales de n=1149 animales; además se evaluó la eficiencia de la prueba como predictora de enfermedad posparto. Posteriormente, se realizó X2 y un modelo de regresión logística final para explorar los factores asociados a la prevalencia de cetosis. La relación entre βHB sanguíneo, la presentación de cetosis y la ocurrencia de enfermedades puerperales se calculó analizando Característica Operativa del Receptor (Receiver Operating Characteristic -ROC). Resultados. Según los niveles de βHB, la prevalencia de cetosis fue de 7,9%, cetosis clínica 0.6% y cetosis subclínica 7.3 %. La prueba fue predictora de enfermedad...
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Papers by LUIS GUILLERMO PALACIO BAENA