oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 5 )

2019 ( 317 )

2018 ( 416 )

2017 ( 404 )

Custom range...

Search Results: 1 - 10 of 218627 matches for " Héctor Manuel; Silva Cabrera "
All listed articles are free for downloading (OA Articles)
Page 1 /218627
Display every page Item
Seroprevalencia de la infección por HTLV-1 en diferentes grupos de riesgo estudiados en Cuba
Ana Luisa Lubián Caballero,Héctor Manuel Díaz Torres,Eladio Silva Cabrera,María Teresa Pérez Guevara
Revista Cubana de Medicina , 1998,
Abstract: Se estudiaron, en el período comprendido desde 1991 hasta 1996, 26 352 muestras de suero procedentes de diferentes grupos de riesgo y donantes de sangre para conocer la seroprevalencia de anticuerpos contra el virus linfotrópico de las células T humanas tipo I (HTLV-I) y como continuación de investigaciones realizadas entre 1989 y 1990. Se empleó el sistema de ELISA DAVIH-HTLV-I para el pesquisaje de anticuerpos y como prueba confirmatoria, el Western Blot DAVIH-Blot HTLV-I, ambos de Laboratorios DAVIH, Cuba. Se confirmó la presencia de anticuerpos anti HTLV-I en 10 personas y en la mayoría de ellas el estudio epidemiológico logró esclarecer la vía probable de contagio. El índice de seropositividad observado fue de 0,037 %, lo que en comparación con las tasas de seroprevalencia reportadas para el área del Caribe resulta bajo. In the period between 1991 and 1996, 26 352 serum samples from different risk groups and blood donors, were studied to know the seroprevalence of antibodies against the human T-lymphotropic virus type I (HTLV-I), and also as a continuation of researches carried out between 1989 and 1990. The ELISA DAVIH-HTLV-I system was used for the antibodies investigation, and as a certifying test, the Western Blot DAVIH-Blot HTLV-I was used too, both from the Cuban DAVIH Laboratories. The presence of anti HTLV-I antibodies was confirmed in 10 persons, and in most of them the epidemiologic study could elucidate the probable way of contagion. The seropositivity index observed was of 0,037 %, and is low if compared with the seroprevalence rates reported for the Caribbean area.
Seroprevalencia de la infección por HTLV-1 en diferentes grupos de riesgo estudiados en Cuba
Lubián Caballero,Ana Luisa; Díaz Torres,Héctor Manuel; Silva Cabrera,Eladio; Pérez Guevara,María Teresa; Cruz Sui,Otto; de la Fuente Arzola,José Luis; Navea Leyva,Leonor; Noa Romero,Enrique;
Revista Cubana de Medicina , 1998,
Abstract: in the period between 1991 and 1996, 26 352 serum samples from different risk groups and blood donors, were studied to know the seroprevalence of antibodies against the human t-lymphotropic virus type i (htlv-i), and also as a continuation of researches carried out between 1989 and 1990. the elisa davih-htlv-i system was used for the antibodies investigation, and as a certifying test, the western blot davih-blot htlv-i was used too, both from the cuban davih laboratories. the presence of anti htlv-i antibodies was confirmed in 10 persons, and in most of them the epidemiologic study could elucidate the probable way of contagion. the seropositivity index observed was of 0,037 %, and is low if compared with the seroprevalence rates reported for the caribbean area.
Marcadores de progresión serológicos y celulares en pacientes cubanos infectados por VIH-1
Díaz Torres,Héctor Manuel; Ribas Antúnez,María de los ángeles; Lubián Caballero,Ana Luisa; Pérez Toledo,Liliana; Izquierdo Márquez,Maricela; Silva Cabrera,Eladio;
Revista Cubana de Medicina , 2001,
Abstract: the behavior of serologic and cell markers for disease progression in a group of cuban serologically-confirmed hiv-infected patients was studied. firstly, 228 subjects at different clinical stages were randomly selected. the level of antibodies to hiv-1 24 kd protein was determined in every case which were followed-up for 26.5 months to observe their clinical progression. at the beginning of the follow-up period, it was confirmed that 65 % of patients with minor opportunistic infections and 98 % of aids patients had low anti p24 antibody titers and that the clinical progression rate was significantly higher in the group of patients that entered the study with low titers or lack of detectable anti p24 antibodies. at the end of the follow-up period, a cross sectional study was performed on 100 of the 228 patients, which included determination of anti p24 antibody titers, p24 antigenemia detection and lymphocyte sub-population count through flow cytometry. there was a correlation among serologic tests, cd4+ cell counts and clinical staging. the reduction of anti p24 antibodies titers was seen as an early marker. the usefulness of the combined use of these markers in the clinical follow-up of those patients was pointed out
Análisis Comparativo de la Composición Corporal de árbitros de Fútbol de Brasil y Uruguay
da Silva,Alberto Inácio; de los Santos,Héctor; Cabrera,Carlos;
International Journal of Morphology , 2012, DOI: 10.4067/S0717-95022012000300019
Abstract: the aim of this study was to comparative analysis of morphological profile of elite soccer referees from brazil and uruguay.the sample consisted of 27 referees from brazil, with a mean age of 37.6 ± 4.2 years, weight 79.1 ± 7.9 kg and height 179.1 ± 4.8 cm; and 14 referees from uruguaymean age 37.8 ± 3 years, weight 74.3 ± 7.4 kg and height 175 ± 6.8 cm.the variables of body weight, height, skinfolds, body girths and bone widths were measured in order to estimate body composition and somatotype of the referees.to determine the body composition we used seven skinfolds, four circumferences and seven widths.with respect to the data of body composition, when comparing the data with the brazilian and uruguay, there was a significant statistical difference between body weight, bmi and body fat percentage (p> 0.05).although the somatotype of both groups are classified as endomorph-mesomorph (somatotype average 3.7 to 4.0 -2.0), the brazilian officials showed a body fat percentage higher, which might constitutea physical performance limiting factor during the match and could be monitored through a program of good eating habits and physical fitness.
Análisis Comparativo de la Composición Corporal de árbitros de Fútbol de Brasil y Uruguay Comparative Analysis of Body Composition of Football (Soccer) Referees from Brazil and Uruguay
Alberto Inácio da Silva,Héctor de los Santos,Carlos Cabrera
International Journal of Morphology , 2012,
Abstract: El objetivo de este estudio fue hacer un análisis comparativo del perfil morfológico de árbitros de fútbol de elite de Brasil y Uruguay. La muestra fue compuesta por 27 árbitros del Brasil, con edad promedio de 37,6±4,2 a os, peso de 79,1±7,9 kg y estatura de 179,1±4,8 cm y 14 árbitros de Uruguay con edad promedio de 37,8 ± 3 a os, peso de 74,3 ± 7,4 kg y estatura de 175 ± 6,8 cm. Las variables de masa corporal, estatura, grosor de pliegues cutáneos, circunferencias corporales y diámetros óseos, fueron medidas con la finalidad de estimar la composición corporal y determinar el somatotipo de los árbitros. Para determinar la composición corporal se utilizaron: siete pliegues cutáneos, siete circunferencias corporales y cuatro diámetros óseos. Con respecto a los datos de composición corporal cuando se comparó los datos de los árbitros brasile os con los uruguayos se verificó una diferencia estadísticamente significativa entre el peso corporal, IMC y porcentaje de grasa corporal (p>0,05). Aunque el somatotipo de ambos grupos serán clasificados como endomorfo-mesomorfo (somatotipo promedio de 3,7- 4,0 -2,0), los árbitros brasile os presentaron una porcentaje de grasa corporal muy elevada lo que puede ser un factor limitante en la performance física durante el partido y que podría ser controlado por medio de programas de buenos hábitos alimenticios como de acondicionamiento físico. The aim of this study was to comparative analysis of morphological profile of elite soccer referees from Brazil and Uruguay.The sample consisted of 27 referees from Brazil, with a mean age of 37.6 ± 4.2 years, weight 79.1 ± 7.9 kg and height 179.1 ± 4.8 cm; and 14 referees from Uruguaymean age 37.8 ± 3 years, weight 74.3 ± 7.4 kg and height 175 ± 6.8 cm.The variables of body weight, height, skinfolds, body girths and bone widths were measured in order to estimate body composition and somatotype of the referees.To determine the body composition we used seven skinfolds, four circumferences and seven widths.With respect to the data of body composition, when comparing the data with the Brazilian and Uruguay, there was a significant statistical difference between body weight, BMI and body fat percentage (p> 0.05).Although the somatotype of both groups are classified as endomorph-mesomorph (somatotype average 3.7 to 4.0 -2.0), the Brazilian officials showed a body fat percentage higher, which might constitutea physical performance limiting factor during the match and could be monitored through a program of good eating habits and physical fitness.
Resultados preliminares del perfeccionamiento del DAVIH-AgP24 con el empleo del sistema de amplificación biotina-tiramina/estreptavidina-peroxidasa Preliminary results of DAVIH-AgP24 with the biotin-tiramyne/streptavidine-peroxidase amplification system
Anitza Fragas Quintero,Eva Ortiz Losada,Héctor M. Díaz Torres,Eladio Silva Cabrera
Revista Cubana de Medicina Tropical , 2009,
Abstract: OBJETIVO: se modificó el ELISA DAVIH-Ag P24 con la introducción de la disociación por calor de las muestras de plasma y el empleo de un sistema de amplificación biotina-tiramina/estreptavidina-peroxidasa, para incrementar su sensibilidad. MéTODOS: se determinó la repetibilidad interensayo en el DAVIH-Ag P24 amplificado. Se evaluaron 32 muestras de plasma de individuos infectados por el VIH-1 en 3 categorías clínicas (caso SIDA, asintomáticos y con infecciones oportunistas menores). RESULTADOS: en la determinación de la repetibilidad interensayo se obtuvo un coeficiente de variación entre 4 y 10,3 %. Con el DAVIH-Ag P24 amplificado se incrementó el nivel de detección de P 24 hasta 0,5 pg/mL. El DAVIH-Ag P24 amplificado alcanzó 66 % de sensibilidad, mientras que el DAVIH-Ag P24 obtuvo 31 %. CONCLUSIONES: este estudio preliminar permitió demostrar que la incorporación de las nuevas modificaciones al sistema DAVIH-Ag P24 amplificado logró aumentar los niveles de detección de P24 y ganar en sensibilidad. OBJECTIVE: ELISA DAVIH-Ag p24 was modified by introducing heat dissociation of plasma samples and a tyramine/streptavidine-peroxidase amplification system, with the objective of increasing sensitivity. METHODS: Between-assay repeatability was determined in amplified DAVIH-Ag p24. Thirty two plasma samples from HIV-1-infected individuals classified in three clinical categories (AIDS case, asymptomatic and minor opportunistic infections) were evaluated. RESULTS: the variation coefficient ranged 4-10.3 % in between-assay repeatability. With the amplified DAVIH-p24 Ag, the p24 antigen detection level increased to 0.5 pg/mL. Amplified DAVIH-p24 Ag reached 66 % sensitivity whereas standard DAVIH-p24 Ag sensitivity rate was 31 %. CONCLUSIONS: This preliminary study proved that the introduction of new modifications in amplified DAVIH-p24 Ag managed to increase the p24 antigen detection levels and to gain sensitivity.
Resultados preliminares del perfeccionamiento del DAVIH-AgP24 con el empleo del sistema de amplificación biotina-tiramina/estreptavidina-peroxidasa
Fragas Quintero,Anitza; Ortiz Losada,Eva; Díaz Torres,Héctor M.; Silva Cabrera,Eladio; Izquierdo Márquez,Maricela;
Revista Cubana de Medicina Tropical , 2009,
Abstract: objective: elisa davih-ag p24 was modified by introducing heat dissociation of plasma samples and a tyramine/streptavidine-peroxidase amplification system, with the objective of increasing sensitivity. methods: between-assay repeatability was determined in amplified davih-ag p24. thirty two plasma samples from hiv-1-infected individuals classified in three clinical categories (aids case, asymptomatic and minor opportunistic infections) were evaluated. results: the variation coefficient ranged 4-10.3 % in between-assay repeatability. with the amplified davih-p24 ag, the p24 antigen detection level increased to 0.5 pg/ml. amplified davih-p24 ag reached 66 % sensitivity whereas standard davih-p24 ag sensitivity rate was 31 %. conclusions: this preliminary study proved that the introduction of new modifications in amplified davih-p24 ag managed to increase the p24 antigen detection levels and to gain sensitivity.
Detección de anticuerpos contra la proteína de 24 kd del VIH-1: Correlación clínico serológica
HéCTOR DíAZ TORRES,ELADIO SILVA CABRERA,ORFELINA RODRíGUEZ GARCíA,JORGE BáRCENAS MOSES
Revista Cubana de Medicina Tropical , 1996,
Abstract: Se estudió la presencia de anticuerpos contra la proteína de 24 kd del VIH mediante el empleo paralelo del Western Blot DAVIH BLOT y del DAVIH AC P24 en muestras de suero de 176 pacientes en diferentes estadíos de la infección por VIH-1. Los resultados se correlacionaron con la clasificación clínica del paciente al momento de la toma de muestra y con la evolución posterior durante 6 meses. El 57 % de los pacientes con infecciones oportunistas menores y el 96 % de los enfermos de SIDA presentaron títulos bajos de anticuerpos. Los fallecidos no mostraron reactividad o presentaron títulos muy bajos en muestras tomadas antes del fallecimiento. Se observaron diferentes titulaciones en grupos de sueros con reactividad aparentemente uniforme en el Western Blot. Los resultados indican una adecuada correlaciòn clínico serológica; por lo que el ELISA DAVIH AC P24 pudiera ser útil en el seguimiento clínico de personas infectadas por el VIH-1. The presence of antibodies against the HIV protein of 24 kd was studies by the parallel use of the DAVIH BLOT Western Blot and of the DAVIH AC P24 ELISA in serum samples from 176 patients at different HIV-1 infection stages. The results were correlated with the clinical classification of the patient at the moment of taking the sample and with the further evolution during 6 months. 57 % of the patients with opportunistic minor infections and 96 % of AIDS patients had low antibodies titres. Dead pattients showed no reactivity or presented very low titres in samples taken before dying. Different titrations were observed in serum groups with an apparently uniform reactivity in the Western Blot. The results show and adequate clinical and serological correlation. Therefore, the DAVIH AC P24 ELISA could be useful in the clinical follow-up of HIV-1 infected persons.
Altura del Proceso Condilar en Pacientes con Diferentes Clases Esqueletales que Requieren Tratamiento de Ortodoncia
Fuentes,Ramón; Silva,Héctor; Sandoval,Paulo; Cuevas,Felipe; Rodríguez,Manuel;
International Journal of Morphology , 2006, DOI: 10.4067/S0717-95022006000400033
Abstract: the dysfunction temporomandibular are prevalent of the people, the etiologic factor had been multifactor. they can be associated in structural, functional and psychosocial factors. the studies had showed that the 75% of the people had sign and 33% symptom of ttm. the structural factor are very important, like asymmetries of the components the temporomandibular joint. the condilar asymmetric had been studied in different skeletal patters. we evaluated 331 panoramic radiographic and teleradiographics of subjects age between 8 and 18 years old. we evaluated the anb angle and condilar vertical high, we used the habets et al. (1988) method. according to the anb angle, the teleradiographics and panoramic were distribution in esqueletal class i, 29,4%; esqueletal class ii, 58,2 %; esqueletal class iii, 12,4%. the condilar asymmetric mayor 3 % in 222 subjects (67,1%). esqueletal class iii was the more prevalence (37, 5%) the asymmetries have a risk structural component, we recommend to have an evaluation of the condilar process in the patient who require orthodontic treatment and for it is necessary to have the more exhaustive analyze in the patients who presents this asymmetries
Metaplasia mieloide agnogénica expresada como fiebre de origen desconocido
Fenández Arias,Manuel A; Rodríguez Silva,Héctor; Buchaca Faxas,Emilio; Machado Puerto,Isidro;
Revista Cubana de Medicina , 2004,
Abstract: the case of a 63-year-old male patient that began to have fever of 38- 39°c every day without chills four months ago is reported. he was admitted in “camilo cienfuegos” hospital, in sancti spiritus, where he underwent multiple investigations, but the diagnosis could not be defined. he was referred to “hermanos ameijeiras” hospital with the diagnosis of fever of unknown origin (fuo). during the interwiew, it was found that he had lost 20 pounds of weight. the physical examination showed pale mucosas and hepatomegalia of 4 cm . after several investigations that included bone marrow biopsy on two occasions, it was suspected a chronic myeloproliferative syndrome without myelofibrosis, with a slight increase of the reticulin. it was decided to perform laparotomy with splenectomy and wedge liver biopsy that showed megakaryopoietic myeloid metaplasia in both organs. it was concluded the diagnosis of agnogenic myeloid metaplasia in a prefibrotic stage that presented itself by a fever of unknown origin.
Page 1 /218627
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.