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1.
Nanomaterials (Basel) ; 14(8)2024 Apr 21.
Article in English | MEDLINE | ID: mdl-38668221

ABSTRACT

Sputtering of silicon in a He magnetron discharge (MS) has been reported as a bottom-up procedure to obtain He-charged silicon films (i.e., He nanobubbles encapsulated in a silicon matrix). The incorporation of heavier noble gases is demonstrated in this work with a synergistic effect, producing increased Ne and Ar incorporations when using He-Ne and He-Ar gas mixtures in the MS process. Microstructural and chemical characterizations are reported using ion beam analysis (IBA) and scanning and transmission electron microscopies (SEM and TEM). In addition to gas incorporation, He promotes the formation of larger nanobubbles. In the case of Ne, high-resolution X-ray photoelectron and absorption spectroscopies (XPS and XAS) are reported, with remarkable dependence of the Ne 1s photoemission and the Ne K-edge absorption on the nanobubble's size and composition. The gas (He, Ne and Ar)-charged thin films are proposed as "solid" targets for the characterization of spectroscopic properties of noble gases in a confined state without the need for cryogenics or high-pressure anvils devices. Also, their use as targets for nuclear reaction studies is foreseen.

2.
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1389760

ABSTRACT

Resumen Las neoplasias en glándulas salivales son infrecuentes, representando menos del 3% de los tumores de cabeza y cuello. El carcinoma mucoepidermoide es el tumor maligno más común en glándulas salivales, siendo su principal ubicación la parótida. Clínicamente se asemeja a otras lesiones de mucosa oral, por lo cual, es importante realizar un correcto diagnóstico diferencial. Su comportamiento biológico se relaciona con el grado histológico tumoral, factor relevante en el pronóstico y tratamiento de esta neoplasia. Presentamos el caso de un paciente hombre de 75 años afectado con un tumor en paladar con diagnóstico de carcinoma mucoepidermoide de bajo grado. Como tratamiento se realizó una maxilectomía parcial y una placa obturadora en base a una prótesis removible y posterior reconstrucción con un colgajo libre microvascularizado. Actualmente el paciente se encuentra en controles periódicos, libre de enfermedad. Los tumores de glándulas salivales son un desafío diagnóstico, requieren de exámenes imagenológicos y del estudio histopatológico. Cuando existen dudas en el diagnóstico, se debe considerar repetir la toma de la muestra o la obtención de biopsias de más de una zona representativa que permita el diagnóstico de la lesión.


Abstract Salivary gland neoplasms are infrequent lesions representing less than 3% of head and neck tumors. Mucoepidermoid carcinoma is the most common malignant tumor in salivary glands, being the parotid the most usual location. Clinically, it resembles other oral mucosa lesions, therefore, it is important to make a correct differential diagnosis. Its biological behavior is related to the tumor histological grade, a relevant factor in the prognosis and treatment of this neoplasm. We reported a case of a 75-year-old-man, with a tumor in the palate, diagnosed as low-grade mucoepidermoid carcinoma. A partial maxillectomy and an obturator plate were performed based on a removable prosthesis and subsequent reconstruction with a microvascularized free flap. The patient is currently undergoing regular checkups, maintaining disease free. Salivary gland tumors are a diagnostic challenge, requiring imaging tests and histopathological study. In case of doubts with the diagnosis, it should be considered to biopsy more than area or to repeat the biopsy in order to obtain a representative sample that allows the diagnosis of the lesion.

3.
Rev. MVZ Córdoba ; 25(3): 116-125, sep.-dic. 2020. tab, graf
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1394668

ABSTRACT

RESUMEN Objetivo. El objetivo de este estudio fue describir las medidas corporales e índices zoométricos de Ovinos de Pelo Criollos Colombianos (OPC), en dos de sus variedades, Sudán Bayo y Sudán Blanco. Materiales y métodos. Esta investigación fue llevada a cabo en los departamentos de Córdoba, Cesar y La Guajira, se visitaron dos granjas en cada uno de los primeros dos departamentos y una en el tercero. 21, 75 y 14 animales por departamento fueron evaluados, respectivamente. Se estudiaron 29 variables morfoestructurales y el peso corporal en 110 ovejas Sudán, y con estas variables evaluadas, se construyeron 15 índices zoométricos. A la información recolectada se le aplicó estadística descriptiva mediante el software InfoStat®. Resultados. Las Sudán Bayo presentaron valores superiores a las Sudán Blanco para el peso (40.8 y 40.57 kg), al igual que para todas las medidas zoométricas relativas a la cabeza, las extremidades y la mayoría de las del tronco; para la primera variedad se emplearon 83 ejemplares y para la segunda 27. En cuanto a los índices zoométricos, las Sudán se caracterizaron por ser dolicocraniotas, dolicocéfalas, eumétricas, de tórax con tendencia elíptica, de grupas convexilíneas y de acuerdo a dos índices etnológicos longilíneas, mientras que con base en un índice funcional brevilíneas. Conclusiones. A través de esta investigación se conoció de manera detallada el estado morfométrico actual de las OPC Sudán, así como también la proporcionalidad entre las regiones corporales de estas, cuya inclinación es hacia el biotipo cárnico. Esta información es de importancia para el conocimiento, caracterización racial, definición de biotipo, conservación, fomento y mejora genética de los OPC.


ABSTRACT Objective. The objective of this study was to describe the body measurements and zoometric indices of Sudán Bayo and Sudán Blanco, two breed varieties of Colombian creole woolless sheep (OPC). Materials and methods. This research was carried out in the departments of Córdoba, Cesar, and La Guajira. Two farms were visited in each of the first two departments and one farm in the third department. Twenty-one, 75, and 14 animals were evaluated in each department, respectively. Twenty-nine morphostructural variables and body weight were studied in 110 Sudán sheep. Based on this, 15 zoometric indices were also estimated. Descriptive statistic was applied to the information collected through the InfoStat® software. Results. Sudán Bayo sheep had higher values than Sudán Blanco sheep for the body weight (40.8 and 40.57 kg), as well as for all the zoometric measurements relative to the head and extremities, and most of the trunk morphometric measurements; in the first breed variety 83 ewes were used and in the second 27 individuals. Regarding the zoometric indices, Sudán sheep were characterized as dolichocranial, dolichocephalic, eumetric, of thorax with elliptical tendency, convex rump, and longilineal animals according to two ethnological indices while brevilineal animals based on one functional index. Conclusions. Through this investigation, the current morphometric status of Sudán OPC sheep was known in detail, as well as the proportionality between the corporal regions of these, whose inclination is towards the meat biotype. This information is of importance for the breed recognition and characterization, biotype definition, conservation, development, and genetic improvement of OPC sheep.

4.
Neuroimage Clin ; 27: 102240, 2020.
Article in English | MEDLINE | ID: mdl-32361633

ABSTRACT

We present a Human Connectome Project study tailored toward adolescent anxiety and depression. This study is one of the first studies of the Connectomes Related to Human Diseases initiative and is collecting structural, functional, and diffusion-weighted brain imaging data from up to 225 adolescents (ages 14-17 years), 150 of whom are expected to have a current diagnosis of an anxiety and/or depressive disorder. Comprehensive clinical and neuropsychological evaluations and longitudinal clinical data are also being collected. This article provides an overview of task functional magnetic resonance imaging (fMRI) protocols and preliminary findings (N = 140), as well as clinical and neuropsychological characterization of adolescents. Data collection is ongoing for an additional 85 adolescents, most of whom are expected to have a diagnosis of an anxiety and/or depressive disorder. Data from the first 140 adolescents are projected for public release through the National Institutes of Health Data Archive (NDA) with the timing of this manuscript. All other data will be made publicly-available through the NDA at regularly scheduled intervals. This article is intended to serve as an introduction to this project as well as a reference for those seeking to clinical, neurocognitive, and task fMRI data from this public resource.


Subject(s)
Anxiety Disorders/diagnostic imaging , Anxiety/diagnostic imaging , Brain/physiopathology , Depression/diagnostic imaging , Neuroimaging , Adolescent , Anxiety Disorders/physiopathology , Boston , Brain/diagnostic imaging , Brain Mapping/methods , Connectome/methods , Depression/physiopathology , Female , Humans , Magnetic Resonance Imaging/methods , Male , Neuroimaging/methods
5.
Rev. MVZ Córdoba ; 25(1): 84-93, ene.-abr. 2020. tab, graf
Article in Spanish | LILACS | ID: biblio-1279658

ABSTRACT

RESUMEN Objetivo. Esta investigación tuvo como objetivo describir la morfología cualitativa y faneróptica de hembras Ovino de Pelo Criollo Colombiano (OPC) Sudán. Materiales y métodos. Se evaluaron seis características fanerópticas y siete morfológicas cualitativas en 115 hembras Sudán Bayo y Sudán Blanco, de los departamentos Córdoba, Cesar y La Guajira. Los datos obtenidos se analizaron a través del programa estadístico InfoStat® y se estimaron las frecuencias relativas y absolutas para cada uno de los caracteres evaluados. Resultados. Los OPC Sudán Bayo se distinguieron por ser de un color de capa bayo amarillo. Los Sudán Blanco fueron de capa overo castaño, pero predominando siempre el blanco sobre el castaño. Estos ovinos se caracterizaron por poseer mucosas negra-rosadas y en menor proporción habían individuos con mucosas rosadas. Además, presentaron orejas horizontales siempre, perfiles subconvexos en más del 80% de los casos, cuellos generalmente medianos y poco musculados, grupas usualmente inclinadas, ubres parcialmente pigmentadas y también despigmentadas. Asimismo, se caracterizaron por ostentar pezuñas veteadas mayoritariamente, aunque con un alto porcentaje de pezuñas claras en las Sudán Blanco. Conclusiones. Este trabajo ha permitido caracterizar de manera específica a las OPC Sudán desde la morfología y la faneróptica, obteniéndose así información de importancia para delimitar los parámetros de pertenencia a este grupo y para la propuesta de creación de un estándar racial.


ABSTRACT Objective. The objective of this research was to describe the qualitative morphology and phaneroptic of Sudán Colombian creole woolless sheep (OPC). Materials and methods. Six phaneroptic and seven qualitative morphological characteristics were evaluated in a total of 115 Sudán Bayo and Sudán Blanco ewes, from the departments Córdoba, Cesar and La Guajira. The data obtained were analyzed through the statistical program InfoStat®, relative and absolute frequencies were estimated for each evaluated trait. Results. Sudán Bayo OPC were distinguished by being yellow coat color. Sudán Blanco were white-and-chestnut spotted coat color, but white always predominated over chestnut. These ovines usually had black-rosy mucosae and in lesser amount there were individuals with rosy mucosae. Besides, they presented horizontal ears always, sub-convex profile in more than 80% of cases, generally medium-sized and scant muscled necks, usually inclined rumps, partially pigmented and depigmented udders as well. Likewise, they were characterized by showing marbled hooves mostly, but with a high percentage of clear hooves in Sudán Blanco sheep. Conclusions. This research has allowed to characterize specifically. Sudán OPC sheep from morphology and phaneroptic; thus, important information has been obtained to delimit the parameters of belonging to this group and for proposing the creation of a breed standard.


Subject(s)
Animals , Sheep
6.
Rev. cir. (Impr.) ; 71(2): 152-156, abr. 2019. tab
Article in Spanish | LILACS | ID: biblio-1058248

ABSTRACT

OBJETIVO: Determinar predictores de buena respuesta con el uso de prótesis en la estenosis traqueobronquial. MATERIALES Y MÉTODO: Estudio retrospectivo descriptivo de una serie de casos entre junio de 2014 y junio de 2016. Se revisaron registros clínicos, protocolos operatorios, estudios histopatológicos y de imagen. Se consignaron antecedentes demográficos y clínicos al ingreso y luego del procedimiento, etiología de la estenosis traqueal, necesidad de oxígeno en litros, estadía hospitalaria, morbilidad asociada al procedimiento, indicación de terapia complementaria posterior y sobrevida. Se analizaron los datos con estadística descriptiva y analítica. RESULTADOS: Se realizaron 68 procedimientos, en 44 pacientes, 24 mujeres, el diagnóstico principal fue estenosis traqueal con 40 casos. La etiología neoplásica fue el 88% de los casos. El Performance status (PS) de ingreso fue mayor o igual a 2 en el 68% y posterior al procedimiento disminuyó a 22% p < 0,05. En 36 casos los pacientes requerían al menos 1 L de oxígeno lo que disminuyó en 13 casos posterior a la intervención p < 0,05. El tiempo de hospitalización promedio fue 6,2 días (1-60). En 13 pacientes con patología neoplásica se indicó terapia paliativa complementaria. La morbilidad asociada al procedimiento fue de 2,9% dado por prótesis desplazada y lesión iatrogénica. La sobrevida fue de 27% a un año. CONCLUSIONES: La etiología benigna, el PS previo a la intervención menor o igual a 3, requerimiento de oxígeno de 1 litro y obstrucción tumoral menor al 70% del lumen fueron elementos de buena respuesta.


AIM: Determine good response predictors in use of stent in benign and malignant tracheobronchial stenosis. MATERIAL AND METHODS: We retrospectively reviewed medical records of patients submitted to the procedure in the period 2014 to 2016. Clinical records, operative protocols, and histopathological and imaging studies were reviewed. Demographic and clinical data, performance status (PS) at admission and after the procedure, etiology of tracheal stenosis, need for oxygen in liters (L) Post-intervention, hospital stay, procedure-related morbidity, indication of therapy (Chemotherapy and/or Radiotherapy) and survival. Data were analyzed with descriptive and analytics statistics. RESULTS: A total of 68 procedures were performed in 44 patients, 24 women. Tracheal stenosis 40 cases were diagnosed. The malignant etiology was 88%. The admission PS was greater than or equal to 2 in 68% and 22% after the procedure. The oxygen requirements prior to the procedure were at least 1 L in 36 cases and decreased in 13 cases after the procedure. The average hospitalization period was 6.2 days (1-60). Complementary therapy was indicated in 13 patients; the morbidity associated with the procedure was 2.9%, displaced installation and iatrogenic injury. The one year survival was 27%. CONCLUSIONS: Benign etiology, el PS minor than or equal to 3, oxygen requirements prior to the procedure of 1 L and tumoral obstruction less than 75% were good response predictors in our study.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Young Adult , Tracheal Stenosis/surgery , Bronchial Diseases/surgery , Stents , Prostheses and Implants , Tracheal Stenosis/complications , Bronchial Diseases/complications , Survival Analysis , Retrospective Studies , Treatment Outcome , Airway Obstruction/etiology , Length of Stay
7.
Article in Spanish | BINACIS | ID: biblio-1096649

ABSTRACT

INTRODUCCIÓN: La encefalitis es una inflamación grave que involucra el tejido cerebral que se desarrolla de manera aguda o subaguda generalmente en menos de 4-6 semanas, presentando un alto riego de morbi-mortalidad sin un tratamiento adecuado. Las etiologías pueden ser diversas, así como también los tratamientos requeridos. La identificación de la causa constituye entonces un desafío diagnóstico. En la última década, ha habido un aumento en la identificación de formas de encefalitis asociadas con "anticuerpos de superficie neuronal". La patogénesis de las encefalitis autoinmunes radica en una respuesta inmune humoral, de anticuerpos dirigidos contra antígenos neuronales intracelulares, por un mecanismo etiopatogénico diferente, causado por una infección previa o asociado a tumores ocultos, como síndrome para neoplásico, este último más frecuente en adultos. La encefalitis por receptores de glutamato-Nmetil-D-aspartato es la forma más frecuente en niños, seguida a las encefalomielitis desmielinizantes agudas. En la clínica de los pacientes predominan cambios súbitos de conducta y trastornos del movimiento, como así también convulsiones, lo que obliga a descartar causas infecciosas, traumáticas, junto con factores tóxicos, metabólicos y neoplásicos, que a veces conlleva a una demora diagnóstica. Los métodos complementarios diagnósticos pueden ser más o menos específicos para las diferentes fases de la enfermedad. La Resonancia Magnética de cerebro puede mostrar lesiones hipertensas en región límbica o temporal, o ser normal al inicio del cuadro clínico. En la punción lumbar se puede encontrar pleocitosis linfocítica leve a moderada, aumento de la concentración de proteínas o bandas oligoclonales en aproximadamente el 50% de los casos. A nivel electroencefalográfico, un patrón Delta Brush, puede estar presente en un 30-40% de los pacientes. En la bibliografía revisada, se recomienda iniciar la inmunoterapia empíricamente. Aunque algunos pacientes experimentan una recuperación completa espontánea, esto no es frecuente y no es posible identificar a los pacientes con pronóstico favorable. La terapia de primera línea por lo general incluye esteroides, seguida o combinada, con administración de inmunoglobulina intravenosa. En caso de que el tratamiento de primera línea sea insatisfactorio, se debe iniciar tratamiento de segunda línea, con rituximab, ciclofosfamida o micofenolato, solo o en combinación. Con respecto al abordaje terapéutico, se deben esbozar estrategias adaptadas para cada paciente, considerando un enfoque menos agresivo para aquellos con un resultado generalmente mejor, teniendo en cuenta los posibles efectos secundarios versus beneficiosos de los medicamentos inmunoterápicos. (AU)


INTRODUCTION: Since the first description, immune-mediated encephalitis (EI), among them, against the anti-NMethyl-D-Aspartate (NMDAr) receptor has been increasingly recognized, being considered the most frequent immunomediated inflammatory process after Encephalomyelitis acute disseminated. OBJECTIVE: To describe trends in pediatric patients diagnosed with El. MATERIALS AND METHODS: Retrospective, observational clinical histories review was performed in the last 4 years. Eight patients with EI described. The mean age at diagnosis was 7.6 years. The delay in the diagnostic ranged from 6 to 65 days, with 26 days' average. Seven presented final EI, EI AntiNMDA el 6 and one Hashimoto El. RESULTS: Within 15 days of evolution, patients had seizures associated with behavioral changes and abnormal movements, the most frequent orofacial dyskinesias in 38%. In all cases first - line treatment was performed. Four required smafé pla resist. In three patients with second line treatment Rituximab was performed and one cyclophosphamide. The Deltha Brush Pattern was observed in a patient. In 6 of the 8 patient's complete remission (75%) was observed. There was no patient in association with occult tumors. Time tracking in an average of 2 2.8 months with a range of 4-48 months. CONCLUSIONS: Since its description to date, EI reports have been increasing. The presence of seizures associated with cognitive and behavioral changes should raise the index of suspicion and their specific study guide. Early initiation of treatment is associated directly with prognosis and evolution. (AU)


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Encephalitis/diagnosis , Encephalitis/immunology , Encephalitis/therapy , Hashimoto Disease/diagnosis , Autoimmune Diseases/diagnosis , Encephalitis/drug therapy
8.
Article in Spanish | BINACIS | ID: biblio-1096663

ABSTRACT

INTRODUCCIÓN: En la actualidad, el 30 a 40% de los pacientes epilépticos son refractarios a los fármacos anticonvulsivantes. En relación a esto, en los últimos años el uso de marihuana medicinal se ha convertido en un tema controversial tanto en la comunidad médica como en la población general. Se ha descripto que el sistema endocannabinoide del cerebro proporciona protección contra la actividad convulsiva, desempeñando un papel importante en la regulación del sistema nervioso central y equilibrando la interacción sináptica excitadora e inhibidora para una función cerebral normal. El mismo está compuesto principalmente de dos receptores cannabinoides: CB1R (Receptor cannabinoide tipo 1) y CB2R (Receptor Cannabinoide tipo 2). Los receptores CB1R se expresan predominantemente en sistema nervioso central, y el receptor CB2R se localiza principalmente en el sistema inmune humano y hematopoyético. La marihuana tiene dos componentes principales que influyen en el sistema endocannabinoide: delta-9-tetrahidrocannabinol (THC) y el cannabidiol (CBD). El THC a través del CB1R CBD presenta baja afinidad y es antagonista de CB1R y CB2R. Algunos estudios en animales muestran que los antagonistas de CB1R pueden reducir el umbral de las convulsiones. El CBD actúa a través de múltiples mecanismos. Estos incluyen efectos sobre los canales Potasio, Calcio, y funciones antagónicas en el receptor acoplado a proteína G, mediante el cual puede disminuir la liberación pre sináptica de glutamato, excitador del sistema nervioso central. Con todo, los mecanismos exactos subyacentes a los efectos antiepilépticos del CBD no están bien definidos. En estudios iniciales, realizados con utilización del extracto de aceite de cáñamo (con concentraciones de THC< 0,3%), en pacientes con Síndrome de Dravet y Epilepsia tipo Lennox Gastaut, se reportó una franca mejoría en la frecuencia de las crisis y en la calidad de conexión con el entorno del paciente. Asimismo, se objetivó alrededor de un 10% de efecto placebo debido a una escasa confiabilidad en el diseño de dichos estudios, mayormente basados en encuestas. Actualmente, los últimos estudios son realizados con CBD sintetizado, sin contener THC y a dosis mayores, con resultados prometedores. (AU)


INTRODUCTION: Currently, 30 to 40% of epilepsy patients are refractory to anti - convulsant drugs. In recent years, the use of medical marijuana has become a controversial issue not only within the medical community but also in the general population. Cannabidiol it would be responsible for the anticonvulsant effect through modulation of the endocannabinoid system. OBJECTIVE: To evaluate the efficacy of adjuvant treatment cannabis in patients with refractory epilepsy. MATERIALS AND METHODS: A descriptive retrospective study was performed from August 2016 to August 2017. Patients with a diagnosis of refractory epilepsy of various etiologies, to which was indicated as adjunctive therapy cannabidiol drops Everyday Advanced 5000 at a dose of 0.25 mg/lb/day. STATISTICALS ANALYSIS: Descriptive statistics was performed. For variables a chi-square test was used. Statistical significance p <0.05 was considered. RESULTS: The total sample (n = 16), 19% (3 patients) had a reduction equal to or greater than 50% in the seizure frequency (p = 1). Nine patients had electroencephalogram control, of which two patients showed improvements in drawn. By linking patients with EEG control and seizure frequency during treatment, a correlation statistically signific observed, with p <0.01. The 31% showed other positive effects reported by the family, the most common, improvements in connection with the environment. In 6 patients (37.5%) the adverse reaction was irritability. Five patients (31%) decidie rum discontinue treatment in less than 4 months, seeing no significant changes in the frequency of crisis. (AU)


Subject(s)
Humans , Male , Female , Child, Preschool , Child , Adolescent , Adult , Epilepsy/drug therapy , Medical Marijuana/therapeutic use , Seizures/drug therapy , Anticonvulsants/therapeutic use
9.
Article in Spanish | BINACIS | ID: biblio-1096701

ABSTRACT

INTRODUCCIÓN: El término pseudotumorcerebri se reserva para denominar aquellas hipertensiones endocraneanas (HE) que clínicamente asemejan la existencia de un tumor cerebral, debido a la alteración de la circulación del líquido cefalorraquídeo (LCR). Para su diagnóstico se describen los criterios de Dandy-Smith. OBJETIVOS: Objetivo Primario: Determinar el beneficio del uso de Azetazolamida (ACZ) o Topiramato (TPM) en el tratamiento de la hipertensión endocraneana idiopática. Objetivos Secundarios: Uso de Presión de apertura como parámetro indicador para uso de ACZ o TPM. MATERIALES Y MÉTODOS: Tipo de estudio: Descriptivo Retrospectivo Observacional. RESULTADOS: La media de seguimiento fue de 11 meses, con un rango entre 6-12 meses Se estudiaron 5 pacientes con diagnóstico de Hipertensión Endocraneana Idiopática. Del total de los pacientes 5 (100%) tenían F.O patológico y como síntoma cardinal cefalea, 2 (40%) además vómitos. 3 (60%) fue tratado con Topiramato (TPM) mientras que 2 (40%) recibió acetazolamida (ACZ), ambos sin complicaciones (p= 0,07) Del total de los pacientes 3(60%) presento presión de apertura menor de 40 mmHg mientras que en los restantes 2 (40%) fue mayor a 40 mmHg. De estos últimos el 1 paciente recibió TPM y 1 paciente ACZ. Dos pacientes (40%) presentaron en el seguimiento una recaída sintomática, al intentar descender la medicación. No se pudo definir como parámetro de decisión la presión de apertura en del uso de uno u otro medicamento ya que al evaluar el uso de TPM y ACZ en pacientes con presión de apertura mayor a 41 mmHg solo se detallaron 2 pacientes cada uno tratado con un medicamento de los anteriormente descriptos. (Chi cuadrado p= 0.44). Ninguno de los pacientes tratados requirió otro tratamiento complementario como PL seriadas o válvula de derivación ventrículo peritoneal. CONCLUSION: No se logró determinar beneficio en el uso de un medicamento sobre otro en el tratamiento de la hipertensión endocraneana idiopática (p=0,07), pese al tamaño muestral, el cual podría ser un limitante. Coincidentemente con la literatura sigue sin haber evidencia suficiente. No existe un algoritmo de consenso en cuanto al correcto manejo terapéutico y farmacológico de esta entidad. El uso de TPM o ACZ no condiciona la posterior aparición de complicaciones (p= 0.45) El estudio oftalmológico es esencial para diagnóstico y seguimiento. No se pudo establecer correlación entre el valor obtenido en la medición de la presión de apertura y el tratamiento instaurado. (AU)


INTRODUCTION: The term Pseudotumor cerebri is reserved for those endocranial hypertensio (EH) that resemble clinically the existence of a brain tumor, due to alteration of the circulation of the cerebrospinal fluid (CSF). Classically, the Dandy-Smith criteria for diagnosis are described. TYPE OF STUDY: Descriptive observational. OBJECTIVE: Primary Objective: To determine the benefit of the use of Azetazolamide (ACZ) or Topiramate (TPM) in the treatment of idiopathic endocranial hypertension Secondary Objectives: Use of Opening Pressure as indicator parameter for use of ACZ or TPM. MATERIALS AND METHODS: Observed patients(N:5) per clinic with diagnosis of EIH by criteria of Dandy-Smith in the period 2013-2017. I was performed in all patients: RMNC s/contrast Fundus oculi Lumbar puncture + opening pressure. RESULTS: Of the total of patients (5) 100% had F.O pathological and as cardinal symptom headache, and 40% also vomiting. The mean follow-up was 11 months 60% of the patients was treated with topiramate (TPM) while 40% received acetazolamide (ACZ), both without complications. Of the total of patients 60% presented less than 40 opening pressure mmHg, while that in the remaining 40% was greater than 40 mmHg, of which 50% received TPM and 50% ACZ. 40% presented in tracking a symptomatic relapse, trying to get off the medication. None of the treated patients required other adjunctive therapy such as serial PL or ventricleperitoneal shunt. CONCLUSIONS: It was not possible to determine benefit in the use of one drug over another in the treatment of idiopathic intracranial hypertension (p = 0.07), despite the sample size, which could be a limitation. Coincidentally with the literature there is still not enough evidence. There is no consensus algorithm regarding the correct therapeutic and pharmacological management of this entity. The use of TPM or ACZ does not condition the subsequent appearance of complications (p = 0.45) The ophthalmological study is essential for diagnosis and follow-up. No correlation could be established between the value obtained in the measurement of the opening ression and the treatment established. (AU)


Subject(s)
Humans , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Pseudotumor Cerebri/drug therapy , Topiramate/therapeutic use , Acetazolamide/therapeutic use , Pseudotumor Cerebri/diagnosis , Topiramate/administration & dosage , Acetazolamide/administration & dosage
10.
Rev. MVZ Córdoba ; 22(3): 6310-6319, Sep.-Dec. 2017. tab, graf
Article in English | LILACS | ID: biblio-957334

ABSTRACT

ABSTRACT Objective. Evaluate the model that best described the growth in sheep creole in the Department of Cordoba. Materials and methods. Weights of 55 Criollos sheep were used to select the model that best fit the data. Brody, Logistic, Gompertz and Von Bertalanffy models were evaluated. The parameters of the models were estimated using the NLIN procedure of SAS. The selection of the curve that best described the growth was done considering the Aikaike Information Criterion (AIC), the Bayesian Information Criterion (BIC), the Determination Coefficient (R2), and the Percentage of Convergent Curves (CCP). For the model that best described the growth curve, the percentage of maturity at 4 (M4) and 6 (M6) months of age and age at 75 (AM75) and 95% (AM95) at maturity was estimated. Results. The Brody model presented the best fit. Sex effect was significant (p≤0.05) for β2, M4, M6, EM75 and EM95. While the Farm effect had only a significant effect (p≤0.05) for β2. Conclusions. The Brody model best described growth of the studied sheep populations, its estimated values for maturity and age at maturity were low.


RESUMEN Objetivo. Determinar curvas de crecimiento en ovinos Criollos en dos poblaciones del Departamento de Córdoba. Materiales y métodos. Se utilizaron registros de pesos de 55 ovinos Criollos para seleccionar el modelo que mejor se ajustara a los datos. Los modelos evaluados fueron Brody, Logístico, Gompertz y Von Bertalanffy. Los parámetros de los modelos fueron estimados por medio del procedimiento NLIN de SAS. La selección de la curva que mejor describió el crecimiento se realizó considerando el Criterio de Información Aikaike (AIC), el Criterio de Información Bayesiana (BIC), el Coeficiente de Determinación (R2) y el Porcentaje de Curvas Convergentes (PCC). Para el modelo que mejor describió la curva de crecimiento se estimó el porcentaje de madurez a los 4 (M4) y 6 (M6) meses de edad y edad al 75 (EM75) y 95% (EM95) de madurez. Resultados. El modelo de Brody fue el que presentó mejor ajuste. El efecto sexo fue significativo (p≤0.05) para β2, M4, M6, EM75 y EM95, mientras que el efecto finca solo presentó efecto significativo (p≤0.05) para β2. Conclusiones. El modelo de Brody fue el que mejor describió el crecimiento en las poblaciones ovinas estudiadas, siendo los valores estimados para porcentaje de madurez y edad a la madurez bajos.

12.
Rev Neurol ; 64(7): 305-312, 2017 Apr 01.
Article in Spanish | MEDLINE | ID: mdl-28345735

ABSTRACT

INTRODUCTION: Cavernous malformations are vascular malformations of the central nervous system formed by a group of capillaries not covered by pia mater and communicated to the vascular system at very low pressure with very slow flow. Surgery or radiosurgery are the treatment modalities. AIMS: To analyze our results after surgical treatment of supratentorial cavernous malformations, reviewing clinical presentation, surgical indications and postoperative complications. PATIENTS AND METHODS: Analytical retrospective study of medical records and images of patients who underwent resection of supratentorial cavernomas at FLENI from January 1996 until December 2013. RESULTS: We evaluated 51 patients, mean age 34 years, followed for an average of 30 months. In 1.96% of patients diagnosis was incidental, the rest all presented symptoms. Bleeding at diagnosis was observed in 23.52%. Total excision of supratentorial cavernous malformations was possible in all cases. The only postoperative complication was one case of meningitis. CONCLUSIONS: The bleeding rate of supratentorial cavernous malformations in our series was 1.38% per patient per year. Surgical treatment effectively eliminated, or at least reduced symptoms, prevented rebleeding, and decreased need for antiepileptic drug therapy. Surgery have a low complication rate and good outcome.


TITLE: Malformaciones cavernosas supratentoriales en una institucion argentina: experiencia del tratamiento quirurgico.Introduccion. Las malformaciones cavernosas son lesiones vasculares del sistema nervioso central constituidas por endotelio sinusoidal que forma capilares agrupados o cavernas que carecen de los elementos tipicos de una pared arterial madura y ausencia de tejido neural interpuesto. El endotelio esta rodeado por una densa capa de fibras colagenas que dejan pequeñas hendiduras por las que se extravasa hemosiderina. Se comunican con el sistema vascular a muy baja presion y su tratamiento puede ser por microcirugia o radiocirugia. Objetivos. Analizar las malformaciones cavernosas supratentoriales tratadas quirurgicamente en nuestra institucion (FLENI), determinar la epidemiologia y las caracteristicas intrinsecas, estudiar la clinica de presentacion, determinar las indicaciones quirurgicas y complicaciones, y establecer el pronostico. Pacientes y metodos. Estudio retrospectivo analitico de historias clinicas e imagenes de pacientes operados de malformaciones cavernosas supratentoriales en la FLENI desde enero de 1996 hasta diciembre de 2013. Resultados. Evaluamos a 51 pacientes, de 34 años de media, seguidos durante una media de 30 meses. El 1,96% de los pacientes presento diagnostico incidental y el resto mostro sintomas. El 23,52% presento hemorragia en el momento del diagnostico. En todas las cirugias se logro una exeresis total de las malformaciones cavernosas supratentoriales. Se observo un caso de meningitis postoperatoria. Conclusiones. La tasa de sangrado de las malformaciones cavernosas supratentoriales en nuestro medio es del 1,38% por paciente por año. El tratamiento quirurgico es eficaz para erradicar o disminuir los sintomas y para evitar un posible resangrado. Presenta una tasa muy baja de complicaciones y un pronostico neurologico favorable.


Subject(s)
Hemangioma, Cavernous, Central Nervous System/surgery , Adolescent , Adult , Aged , Argentina , Female , Hemangioma, Cavernous, Central Nervous System/diagnosis , Humans , Male , Middle Aged , Neurosurgical Procedures , Retrospective Studies , Young Adult
13.
J Fish Biol ; 89(1): 65-101, 2016 Jul.
Article in English | MEDLINE | ID: mdl-27401480

ABSTRACT

The remarkable fish diversity in the Caribbean rivers of north-western South America evolved under the influences of the dramatic environmental changes of neogene northern South America, including the Quechua Orogeny and Pleistocene climate oscillations. Although this region is not the richest in South America, endemism is very high. Fish assemblage structure is unique to each of the four aquatic systems identified (rivers, streams, floodplain lakes and reservoirs) and community dynamics are highly synchronized with the mono-modal or bi-modal flooding pulse of the rainy seasons. The highly seasonal multispecies fishery is based on migratory species. Freshwater fish conservation is a challenge for Colombian environmental institutions because the Caribbean trans-Andean basins are the focus of the economic development of Colombian society, so management measures must be directed to protect aquatic habitat and their connectivity. These two management strategies are the only way for helping fish species conservation and sustainable fisheries.


Subject(s)
Conservation of Natural Resources , Ecosystem , Fisheries/statistics & numerical data , Fishes , Rivers , Animal Migration , Animals , Colombia , Floods , Fresh Water , Reproduction , Seasons
14.
Water Res ; 103: 276-282, 2016 10 15.
Article in English | MEDLINE | ID: mdl-27472908

ABSTRACT

In the interest of public health and safety, this study aimed to quantify risks associated with the presence of noroviruses (NoV) and human adenoviruses (HAdV) in an urban catchment area in Singapore. Enteric viruses were quantified using QPCR. NoV were more prevalent in water samples than HAdV, and presented higher associated illness risks across all exposure scenarios. For primary contact recreation of adults and children, mean probability of illness were 0.0061 and 0.0089 for NoV, and 0.0028 and 0.0048 for HAdV. For secondary contact recreation, mean probability of illness were 0.0016 for NoV and 0.00068 for HAdV. Therefore, owing to their prevalence and associated risks, NoV are better suited as reference pathogens in recreational waters in Singapore.


Subject(s)
Adenoviruses, Human , Norovirus , Humans , Recreation , Risk Assessment , Water Microbiology
15.
Water Res ; 79: 39-47, 2015 Aug 01.
Article in English | MEDLINE | ID: mdl-25965886

ABSTRACT

This study aimed to evaluate the relationship between FRNA coliphages (FRNA GI to GIV) and human enteric viruses (human adenoviruses, HAdV, astroviruses, AstV, noroviruses, NoV, and rotaviruses, RoV) in a tropical urban freshwater catchment. Positive associations between human-specific coliphages and human viral pathogens substantiate their use as viral indicators and in microbial source tracking. Reverse transcription qPCR was used to measure the concentrations of viruses and FRNA coliphages in concentrated water samples. Environmental water samples were also analyzed for male-specific (F+) and somatic (Som) coliphages using plaque assay. The most abundant enteric virus was NoV (55%) followed by HAdV (33%), RoV (33%), and AstV (23%), while the most abundant FRNA genogroup was GI (85%) followed by GII (48%), GIV (8%) and GIII (7%). Concentrations of human-specific coliphages FRNA GII were positively correlated with NoV, HAdV, RoV, AstV, F+ and Som (τ = 0.5 to 0.3, P < 0.05) while concentrations of animal-specific coliphages FRNA GI were negatively correlated with HAdV and RoV (τ = -0.2, P < 0.05). This study demonstrates statistical relationships between human-specific coliphages and a suite of human enteric viruses in the environment.


Subject(s)
Coliphages/isolation & purification , Fresh Water/virology , RNA Viruses/isolation & purification , Water Microbiology , Adenoviruses, Human/genetics , Adenoviruses, Human/isolation & purification , Astroviridae/genetics , Astroviridae/isolation & purification , Coliphages/genetics , Enterovirus/genetics , Enterovirus/isolation & purification , Environmental Monitoring , Norovirus/genetics , Norovirus/isolation & purification , RNA Viruses/genetics , Rotavirus/genetics , Rotavirus/isolation & purification , Singapore , Tropical Climate , Water Quality
16.
Appl Environ Microbiol ; 81(3): 850-60, 2015 Feb.
Article in English | MEDLINE | ID: mdl-25416765

ABSTRACT

The suitability of traditional microbial indicators (i.e., Escherichia coli and enterococci) has been challenged due to the lack of correlation with pathogens and evidence of possible regrowth in the natural environment. In this study, the relationships between alternative microbial indicators of potential human fecal contamination (Bacteroides thetaiotaomicron, Methanobrevibacter smithii, human polyomaviruses [HPyVs], and F+ and somatic coliphages) and pathogens (Salmonella spp., Pseudomonas aeruginosa, rotavirus, astrovirus, norovirus GI, norovirus GII, and adenovirus) were compared with those of traditional microbial indicators, as well as environmental parameters (temperature, conductivity, salinity, pH, dissolved oxygen, total organic carbon, total suspended solids, turbidity, total nitrogen, and total phosphorus). Water samples were collected from surface waters of urban catchments in Singapore. Salmonella and P. aeruginosa had significant positive correlations with most of the microbial indicators, especially E. coli and enterococci. Norovirus GII showed moderately strong positive correlations with most of the microbial indicators, except for HPyVs and coliphages. In general, high geometric means and significant correlations between human-specific markers and pathogens suggest the possibility of sewage contamination in some areas. The simultaneous detection of human-specific markers (i.e., B. thetaiotaomicron, M. smithii, and HPyVs) with E. coli and enterococcus supports the likelihood of recent fecal contamination, since the human-specific markers are unable to regrow in natural surface waters. Multiple-linear-regression results further confirm that the inclusion of M. smithii and HPyVs, together with traditional indicators, would better predict the occurrence of pathogens. Further study is needed to determine the applicability of such models to different geographical locations and environmental conditions.


Subject(s)
Bacteria/isolation & purification , Feces/microbiology , Feces/virology , Quality Indicators, Health Care , Viruses/isolation & purification , Water Pollution , Humans , Singapore , Urban Population
17.
Water Res ; 58: 122-31, 2014 Jul 01.
Article in English | MEDLINE | ID: mdl-24747143

ABSTRACT

An assessment of the occurrence and concentration of enteric viruses and coliphages was carried out in highly urbanized catchment waters in the tropical city-state of Singapore. Target enteric viruses in this study were noroviruses, adenoviruses, astroviruses and rotaviruses. In total, 65 water samples were collected from canals and the reservoir of the Marina catchment on a monthly basis over a period of a year. Quantitative PCR (qPCR) and single agar layer plaque assay (SAL) were used to enumerate target enteric viruses and coliphages in water samples, respectively. The most prevalent pathogen were noroviruses, detected in 37 samples (57%), particularly norovirus genogroup II (48%), with a mean concentration of 3.7 × 10(2) gene copies per liter. Rotavirus was the second most prevalent virus (40%) with a mean concentration of 2.5 × 10(2) GC/L. The mean concentrations of somatic and male-specific coliphages were 2.2 × 10(2) and 1.1 × 10(2) PFU/100 ml, respectively. The occurrence and concentration of each target virus and the ratio of somatic to male-specific coliphages varied at different sampling sites in the catchment. For sampling sites with higher frequency of occurrence and concentration of viruses, the ratio of somatic to male-specific coliphages was generally much lower than other sampling sites with lower incidences of enteric viruses. Overall, higher statistical correlation was observed between target enteric viruses than between enteric viruses and coliphages. However, male-specific coliphages were positively correlated with norovirus concentrations. A multi-level integrated surveillance system, which comprises the monitoring of bacterial indicators, coliphages and selected enteric viruses, could help to meet recreational and surface water quality criteria in a complex urbanized catchment.


Subject(s)
Coliphages/isolation & purification , Enterovirus/isolation & purification , Fresh Water/virology , Water Microbiology , Adenoviridae/genetics , Adenoviridae/isolation & purification , Coliphages/genetics , Enterovirus/genetics , Environmental Monitoring , Norovirus/genetics , Norovirus/isolation & purification , Polymerase Chain Reaction , Recreation , Rotavirus/genetics , Rotavirus/isolation & purification , Seasons , Singapore , Tropical Climate , Urban Renewal , Water Quality
18.
Microb Biotechnol ; 6(4): 394-405, 2013 Jul.
Article in English | MEDLINE | ID: mdl-23279885

ABSTRACT

Biosurfactants are produced by hydrocarbon-degrading marine bacteria in response to the presence of water-insoluble hydrocarbons. This is believed to facilitate the uptake of hydrocarbons by bacteria. However, these diffusible amphiphilic surface-active molecules are involved in several other biological functions such as microbial competition and intra- or inter-species communication. We report the isolation and characterization of a marine bacterial strain identified as Cobetia sp. MM1IDA2H-1, which can grow using the sulfur-containing heterocyclic aromatic hydrocarbon dibenzothiophene (DBT). As with DBT, when the isolated strain is grown in the presence of a microbial competitor, it produces a biosurfactant. Because the obtained biosurfactant was formed by hydroxy fatty acids and extracellular lipidic structures were observed during bacterial growth, we investigated whether the biosurfactant at its critical micelle concentration can interfere with bacterial communication systems such as quorum sensing. We focused on Aeromonas salmonicida subsp. salmonicida, a fish pathogen whose virulence relies on quorum sensing signals. Using biosensors for quorum sensing based on Chromobacterium violaceum and Vibrio anguillarum, we showed that when the purified biosurfactant was mixed with N-acyl homoserine lactones produced by A. salmonicida, quorum sensing was inhibited, although bacterial growth was not affected. In addition, the transcriptional activities of A. salmonicida virulence genes that are controlled by quorum sensing were repressed by both the purified biosurfactant and the growth in the presence of Cobetia sp. MM1IDA2H-1. We propose that the biosurfactant, or the lipid structures interact with the N-acyl homoserine lactones, inhibiting their function. This could be used as a strategy to interfere with the quorum sensing systems of bacterial fish pathogens, which represents an attractive alternative to classical antimicrobial therapies in fish aquaculture.


Subject(s)
Aeromonas salmonicida/drug effects , Anti-Bacterial Agents/metabolism , Halomonadaceae/metabolism , Quorum Sensing/drug effects , Surface-Active Agents/metabolism , Aeromonas salmonicida/genetics , Aeromonas salmonicida/metabolism , Aeromonas salmonicida/physiology , Biosensing Techniques , Biotransformation , Chromobacterium/drug effects , Chromobacterium/physiology , Gene Expression Profiling , Halomonadaceae/classification , Halomonadaceae/genetics , Molecular Sequence Data , Sequence Analysis, DNA , Thiophenes/metabolism , Vibrio/drug effects , Vibrio/physiology , Virulence Factors/metabolism
19.
Rev. MVZ Córdoba ; 16(2): 2528-2537, mayo-ago. 2011.
Article in Spanish | LILACS | ID: lil-621991

ABSTRACT

Objetivo. Evaluar la composición química y características organolépticas del ensilado de maralfalfa (Pennisetum sp.) más diferentes proporciones de yuca fresca (Manihot esculenta). Materiales y métodos. Se evaluaron 4 tratamientos (T) de ensilaje de maralfalfa más diferentes proporciones de yuca fresca: 0% (Tratamiento 1, Control), 5% (Tratamiento 2), 10% (Tratamiento 3) y 15% (Tratamiento 4). Se determinaron las proporciones de fibra detergente neutro (FDN), fibra detergente ácido (FDA), lignina, fracción de materia seca (MS), extracto etéreo (EE), cenizas y proteína bruta (PB). Además, se evaluaron las características organolépticas. Para evaluar las variables nutricionales del ensilaje, se utilizó un diseño completamente aleatorizado y los datos se analizaron a través de un análisis de varianza y la prueba de polinomios ortogonales. Para la evaluación del consumo y variables organolépticas se utilizaron 20 novillas, a las que se les ofreció 30 kg de ensilaje por cada tratamiento, analizando los resultados a través de estadística descriptiva. Resultados. Las variables nutricionales mostraron diferentes tipos de tendencias polinómicas. La MS y EE tuvieron comportamiento lineal, la lignina cuadrático y la PB, cenizas, FDN, FDA y pH comportamiento cúbico. Las características organolépticas para T3 y T4, fueron excelentes. El consumo promedio de T1, T2, T3 y T4 fue 4.66, 4.42, 4.58 y 4.74 kg, respectivamente. Conclusiones. La inclusión de raíz de yuca contribuyó favorablemente en la calidad nutricional del ensilaje de maralfalfa y sus características organolépticas.


Subject(s)
Animals , Total Quality Management , Silage
20.
Rev. MVZ Córdoba ; 16(1): 2381-2390, ene.-abr. 2011.
Article in Spanish | LILACS | ID: lil-622005

ABSTRACT

Objetivo. Determinar la diferencia esperada de progenie (DEP’s) para el peso al destete (PD) en ganado Brahman como criterio de selección de futuros reproductores. Materiales y métodos. Se utilizaron 552 registros (PD) recolectados entre 1997 y 2007 de la hacienda Mundo Nuevo (San Onofre, Sucre, Colombia), provenientes de 33 padres. El modelo estadístico utilizado incluyó los efectos fijos de año y época de nacimiento, sexo del ternero, número de partos de la vaca y el efecto aleatorio del padre. Para el análisis, se utilizó el método de los cuadrados mínimos mediante el procedimiento PROC GLM, contenido en el statistical analysis system (SAS). La eredabilidad fue estimada con los componentes de varianza entre y dentro de toro, obtenidos por el procedimiento PROC VARCOMP. Las diferencias esperadas de progenies (DEP’s), fueron calculadas a través del método de mejor predictor lineal insesgado (BLUP). Resultados. La media del PD fue 238.5 ± 31.6 kg. Los efectos de padre, sexo, número de partos y año de nacimiento fueron significativos (p≤0.05). La heredabilidad para PD fue 0.43 ± 0.15. Las DEP’s variaron entre -16.9 y + 17 kg, con una exactitud (EXA) que osciló entre 0.71 y 0.78. Conclusiones. La significancia de las diferentes fuentes de variación de PD coincide con la mayoría de los reportes referenciados en la literatura. El valor estimado de la heredabilidad para PD, indica que se puede lograr progreso genético para PD. Los resultados de las (DEP’s) evidenciaron que el 52% de los toros aportan variaciones negativas para PD.


Subject(s)
Cattle , Weaning
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