RESUMEN El propósito del presente estudio fue describir las características clínicas, epidemiológicas, laboratoriales, tratamiento y seguimiento de pacientes con síndrome urémico hemolítico (SUH). Se revisaron las historias clínicas de los pacientes con SUH hospitalizados en el Instituto Nacional de Salud del Niño-Breña (INSN-B) de Lima, Perú. Se incluyeron a 83 pacientes. La mediana de edad fue de 22 meses. El 71,1% (n=59) registró uso previo de antibióticos. El 86,8% (n=72) tuvieron oligoanuria y el 74,6% (n=62) diarrea. Cinco cultivos fueron positivos (dos Escherichia coli enterohemorrágica). Cuarenta y nueve (59%) requirieron terapia de reemplazo renal. Ningún paciente falleció durante la hospitalización. Al año del seguimiento, siete pacientes presentaron nefropatía pos-SUH. En conclusión, en el INSN-B, la mediana de edad fue similar que años anteriores y hubo una mayor frecuencia de oligoanuria y terapia de reemplazo renal en comparación con reportes previos.

ABSTRACT This study aimed to describe the clinical-epidemiological, laboratory, treatment, and follow-up characteristics of patients with hemolytic uremic syndrome (HUS). The medical records of patients with HUS hospitalized at the Instituto Nacional de Salud del Niño-Breña (INSN-B) (Lima, Peru) were reviewed. We evaluated 83 patients. The median age was 22 months (interquartile range: 14 to 30 months). Of the sample, 71.1% (59) registered previous use of antibiotics. Seventy-two (86.8%) had oligoanuria and 62 (74.6%) had diarrhea. Five cultures were positive (two enterohaemorrhagic Escherichia coli). Forty-nine (59%) required renal replacement therapy. No patient died during hospitalization. At one year of follow-up, seven patients developed post-HUS nephropathy. In conclusion, in INSN-B, the median age was like previous years and there was a higher frequency of oligoanuria, and renal replacement therapy compared to previous reports.

ABSTRACT This study aimed to describe the clinical-epidemiological, laboratory, treatment, and follow-up characteristics of patients with hemolytic uremic syndrome (HUS). The medical records of patients with HUS hospitalized at the Instituto Nacional de Salud del Niño-Breña (INSN-B) (Lima, Peru) were reviewed. We evaluated 83 patients. The median age was 22 months (interquartile range: 14 to 30 months). Of the sample, 71.1% (59) registered previous use of antibiotics. Seventy-two (86.8%) had oligoanuria and 62 (74.6%) had diarrhea. Five cultures were positive (two enterohaemorrhagic Escherichia coli). Forty-nine (59%) required renal replacement therapy. No patient died during hospitalization. At one year of follow-up, seven patients developed post-HUS nephropathy. In conclusion, in INSN-B, the median age was like previous years and there was a higher frequency of oligoanuria, and renal replacement therapy compared to previous reports.

RESUMEN El propósito del presente estudio fue describir las características clínicas, epidemiológicas, laboratoriales, tratamiento y seguimiento de pacientes con síndrome urémico hemolítico (SUH). Se revisaron las historias clínicas de los pacientes con SUH hospitalizados en el Instituto Nacional de Salud del Niño-Breña (INSN-B) de Lima, Perú. Se incluyeron a 83 pacientes. La mediana de edad fue de 22 meses. El 71,1% (n=59) registró uso previo de antibióticos. El 86,8% (n=72) tuvieron oligoanuria y el 74,6% (n=62) diarrea. Cinco cultivos fueron positivos (dos Escherichia coli enterohemorrágica). Cuarenta y nueve (59%) requirieron terapia de reemplazo renal. Ningún paciente falleció durante la hospitalización. Al año del seguimiento, siete pacientes presentaron nefropatía pos-SUH. En conclusión, en el INSN-B, la mediana de edad fue similar que años anteriores y hubo una mayor frecuencia de oligoanuria y terapia de reemplazo renal en comparación con reportes previos.

Resumo Introdução As travestis se deparam com diversas situações de injustiça sustentadas por um sistema heteronormado que viola suas vidas, sua corporeidade e silencia suas identidades. Nesse sentido, o apartheid ocupacional opera por meio da formação de uma estrutura que limita suas possibilidades ocupacionais, mas, ao mesmo tempo, as travestis poderiam resistir a esse exercício de poder por meio de diferentes mecanismos, como as performances. Objetivo Explorar e analisar a expressão artística e política da performance, realizada por dissidentes sexuais, como estratégia política de resistência ao apartheid ocupacional. Método este estudo exploratório corresponde a um desenho de estudo de caso, baseado na análise documental audiovisual. Foi analisada uma peça audiovisual intitulada “Yo me maquillo” [Eu me maquio], interpretada por dois artistas chilenos e ativistas dissidentes sexuais na cidade de Valparaíso (Chile). Para a análise, é realizada uma codificação aberta dos elementos significativos e uma codificação axial posterior. Resultados Evidencia-se como a performance opera como estratégia política de resistência ao apartheid ocupacional que as travestis vivenciam em seu cotidiano, por meio da denúncia, visibilidade, ação, agitação e desafio das matrizes hegemônicas, permitindo dar conta das desigualdades e violências estruturais que cruzam suas vidas. Conclusões São discutidas as contribuições do estudo para a terapia ocupacional e a ciência ocupacional. A performance é destacada como uma ocupação coletiva e política que se desenvolve desde a resistência e subversão ao apartheid ocupacional vivido pelas travestis.

Abstract Introduction Transvestite people face different situations of injustice sustained by a heteronormative system that violates their lives, bodies, and silences their identities. In this sense, Occupational Apartheid operates through the formation of a structure that limits their occupational possibilities, but, at the same time, transvestite people resist this exercise of power through different mechanisms such as performances. Objective To explore and analyze the artistic and political expression of performance, developed by sexual dissidents, as a political strategy of resistance to Occupational Apartheid. Method This exploratory study corresponds to a case study design, based on audiovisual documentary analysis. An audiovisual piece called “Yo me maquillo” [I put on makeup] performed by two Chilean sexual dissidents and activists was analyzed in the city of Valparaíso (Chile). For the analysis, open coding of significant elements and posterior axial coding was performed. Results It is evident how the performance as a political strategy of resistance to the occupational apartheid experienced by transvestite people in their daily lives, through the denunciation, visibility, action, agitation, and defying the hegemonic matrices, allowing to account for inequalities and structural violence that crosses their lives. Conclusions The contributions of the study for occupational therapy and occupation science are discussed. Performance is highlighted as a collective and political occupation that develops from the resistance and subversion to occupational apartheid experienced by transvestite people.

Resumen Introducción Las personas travestis se ven enfrentadas a diferentes situaciones de injusticias sostenidas por un sistema heteronormado que violenta sus vidas, corporalidades y silencia sus identidades. En este sentido, el apartheid ocupacional opera a través de la conformación de una estructura que limita sus posibilidades ocupacionales, pero, al mismo tiempo, las personas travestis podrían poner resistencia a ese ejercicio del poder a través de diferentes mecanismos como las performances. Objetivo Explorar y analizar la expresión artística y política de la performance, realizada por disidentes sexuales, como estrategia política de resistencia al apartheid ocupacional. Metodo Este estudio exploratorio corresponde a un diseño de estudio de caso, basado en el análisis documental audiovisual. Se analizó una pieza audiovisual denominada “Yo me maquillo” performada por dos artistas y activistas disidentes sexuales en la ciudad de Valparaíso (Chile). Para el análisis, se realiza una codificación abierta de elementos significativos y una codificación axial posterior. Resultados Se evidencia cómo la performance opera como una estrategia política de resistencia al apartheid ocupacional que personas travestis experimentan en sus vidas cotidianas, a través de la denuncia, visibilización, acción, agitación y desafío de las matrices hegemónicas, permitiendo dar cuenta de las desigualdades y violencias estructurales que cruzan sus vidas. Conclusiones Se discuten los aportes del estudio para la terapia ocupacional y la ciencia de la ocupación. Se destaca la performance como una ocupación colectiva y política que se desarrolla desde la resistencia y subversión al apartheid ocupacional que viven las personas travestis.

Resumen Tuber es un género de hongos ectomicorrízicos con una importante diversidad de especies asociada a hospederos en Junglandaceae. Tuber caryophilum es propuesta como una especie nueva basada en caracteres ecológicos, morfológicos y filogenéticos de 2 marcadores ribosomales (ITS y LSU). Esta especie se caracteriza por formar ectomicorrizas en las raíces de Carya illinoinensis (nogal pecanero) en la Comarca Lagunera de Coahuila y en Chihuahua, México y por presentar ascosporas equinuladas de 18-48 × 10-27 μm. Tuber caryophilum pertenece al clado Rufum y es la especie hermana de Tuber theleascum, una especie descrita del norte de México asociada con Quercus canbyi y Q. polymorpha. Estas 2 especies de trufas pertenecen a un clado del sur de EUA y norte de México con taxones asociados a Quercus y Carya como Tuber lyonii.

Abstract Tuber is a genus of ectomycorrhizal fungi with an important diversity of species associated with hosts in Juglandaceae. Tuber caryophilum is proposed as a new species based on ecological, morphological and phylogenetic characters of 2 ribosomal markers (ITS and LSU). This species is characterized by forming ectomycorrhizae on the roots of Carya illinoinensis (nogal pecanero) in the Comarca Lagunera of Coahuila and Chihuahua, Mexico and by exhibiting 18-48 × 10-27 μm echinulate ascospores. Tuber caryophilum belongs to the Rufum clade and is the sister species of Tuber theleascum, a species reported in northern Mexico associated with Quercus canbyi and Q. polymorpha. These 2 truffles belong to a clade from the southern USA and northern Mexico with taxa associated to Quercus and Carya, such as Tuber lyonii.

Resumen Introducción: El distanciamiento social y la cuarentena han probado tener efectos negativos en la salud mental de las poblaciones, a saber: miedo, ansiedad, depresión y sintomatología de estrés postraumático. La resiliencia emerge como variable amortiguadora del impacto. El objetivo del estudio fue comparar el impacto psicológico del COVID-19 en varios países latinoamericanos. Método: se obtuvo una muestra de 1184 participantes de México, Cuba, Chile, Colombia y Guatemala; cuya edad osciló entre 18 y 83 años (M = 38.78, DT = 13.81). Se aplicó una encuesta sobre síntomas médicos asociados al COVID-19 con tres instrumentos para evaluar: (1) síntomas de depresión, ansiedad y estrés, (2) impacto del evento y (3) resiliencia. Resultados: Las personas más jóvenes, con mayor cantidad de síntomas médicos y con mayores puntajes de impacto del evento tienden a presentar mayor sintomatología depresiva, ansiosa y estrés, siendo el impacto del evento el predictor más determinante. La resiliencia fue el predictor protector contra la depresión, ansiedad y estrés. Conclusiones: Los resultados muestran las diferencias en la respuesta psicológica ante la pandemia del COVID-19 en cada país, y sugieren la necesidad del desarrollo de políticas públicas enfocadas en la prevención y la promoción de la salud integral ante emergencias sanitarias.

Abstract Introduction: Social distancing and quarantine have proven to have negative effects on the mental health of populations, namely fear, anxiety, depression and post-traumatic stress symptoms. Resilience emerges as a buffering variable for such impact. The objective of this study was to compare the psychological impact of COVID-19 in several Latin American countries. Method: A sample of 1184 participants from Mexico, Cuba, Chile, Colombia and Guatemala was obtained; whose age ranged from 18 to 83 years old (M = 38.78, SD = 13.81). A survey on medical symptoms associated with COVID-19 and three instruments to evaluate: (1) depression, anxiety and stress, (2) impact of the event and (3) resilience were administered. Results: Younger people, with more symptoms associated with COVID-19 and those who reported higher scores of impact of event tended to present greater depressive, anxious and stress symptomatology. The impact of the event was the most determinant predictor. Resilience was protective against the impact of event, depression, anxiety and stress. Conclusions: The results show the differences in the psychological response to COVID-19 in each country and suggesting the need to develop public policies focused on prevention and promotion of integral health when facing sanitary emergencies.

ABSTRACT Dementia is a great challenge to public health in Cuba due to its impact on society and families. Cuba’s National Intervention Strategy for Alzheimer Disease and Dementia Syndromes is designed to address this challenge. The Strategy includes working guidelines for primary and secondary care, education about rights of people with cognitive impairment, professional development, research, and health promotion and dementia prevention. An associated action plan, focused on primary care, includes proposals for creation of memory clinics, day centers and comprehensive rehabilitation services for cognitive stimulation. Short-term measures proposed include increasing early detection; creating a dementia morbidity and mortality registry; promoting professional training; providing support for families; and promoting basic and clinical research on dementia. Medium-term proposals aim to reduce dementia incidence and mortality by controlling risk factors and promoting healthy lifestyles, offering new treatment options and optimizing early detection. A set of indicators has been developed to evaluate strategy implementation. With this strategy, Cuba joins the small number of developing countries that have responded to WHO’s call to improve care for patients with dementia and alleviate its impact on society and families.

Insulin resistance is a prevalent condition commonly associated with unhealthy lifestyles. It affects several metabolic pathways, increasing risk of abnormalities at different organ levels. Thus, diverse medical specialties should be involved in its diagnosis and treatment. With the purpose of unifying criteria about this condition, a scientific-based consensus was elaborated. A questionnaire including the most important topics such as cardio-metabolic risk, non-alcoholic fatty liver disease and polycystic ovary syndrome, was designed and sent to national experts. When no agreement among them was achieved, the Delphi methodology was applied. The main conclusions reached are that clinical findings are critical for the diagnosis of insulin resistance, not being necessary blood testing. Acquisition of a healthy lifestyle is the most important therapeutic tool. Insulin-sensitizing drugs should be prescribed to individuals at high risk of disease according to clinically validated outcomes. There are specific recommendations for pregnant women, children, adolescents and older people.

The insect Trioza rusellae Tuthill (Hemiptera-Triozidae) produces galls on the leaves of the Ramon (Brosimum alicastrum Swartz) tree, species with high nutritional value of the Peninsula of Yucatan. The insect was isolated and identified from collections in the municipalities of Muna and Sacalum, Yucatán. Five to 10 years old trees were sampled selecting branches with leaves showing galls. The samples were placed in plastic bags and taken to the laboratory, and placed in entomological cages. Adult insects were collected using a manual vacuum, while galls were dissected to collect the nymphs directly with a brush (0001). The samples were preserved in alcohol (70 %) and in fixative formalin-alcohol-water (FAW). Nymphs and adult insects from the alcohol samples were mounted and observed on a stereoscopic microscope. The samples in FAW were processed and observed under a scanning electron microscope (SEM). As a result, photographs were obtained and development phases of T. rusellae were identified by entomological keys.

El insecto Trioza rusellae Tuthill (Hemiptera-Triozidae) produce agallas en las hojas del árbol de ramón (Brosimum alicastrum Swartz), especie con alto valor nutricional de la península de Yucatán. El insecto fue aislado e identificado a partir de colectas en los municipios de Muna y Sacalum, Yucatán. Los árboles de cinco a 10 años de edad se muestrearon seleccionando ramas con hojas que presentaban agallas. Las muestras se colocaron en bolsas de plástico y se trasladaron al laboratorio confinándolas en jaulas entomológicas. Los adultos se recolectaron con un aspirador manual, mientras que las agallas se disectaron para colectar las ninfas directamente con un pincel (0001). Las muestras se conservaron en alcohol (70 %) y en fijador formol-alcohol-agua (FAA). Las ninfas y adultos de las muestras en alcohol se montaron y observaron en el microscopio estereoscópico. Las muestras en FAA se procesaron y observaron en el microscopio electrónico de barrido (MEB). Como resultado, se obtuvieron fotografías y se identificaron las fases de desarrollo de T. rusellae mediante claves entomológicas.

The use of central venous catheters for haemodialysis has increased to such an extent that in our country 30% of patients now have this vascular access. However their duration is limited and they frequently present complications, such as bacteraemia related to the haemodialysis catheter. This is a complication with high morbimortality in patients undergoing chronic renal replacement therapy. The aim of this analysis was to determine the incidence of hospitalizations, identify the germs most frequently found in our population and analyse the associated demographic and clinical factors. A prospective observational study was carried out in which all hospital admissions during 2011 for bacteraemia related to the haemodialysis catheter were analysed. Clinical, demographic and comborbility data of the patients were compiled. The total number of admissions for catheter-related bacteraemia was 45 in 35 patients, with a mean age of 69.9 years. The most frequently isolated germs were gram-positive cocci (Methicillin-Resistant Staphylococcus Aureus and Methicillin-Sensitive Staphylococcus Aureus). Mortality was 14% (5 patients). In light of our results, we may conclude that catheter-related bacteraemia is a serious complication in haemodialysis patients. It represents almost 50% of hospital admissions in 2011 of haemodialysis patients. It is associated to high morbility and consumption of resources.

El uso de catéteres venosos centrales para hemodiálisis se ha incrementado de tal forma, que actualmente en nuestro país, el 30%, de los pacientes son portadores de este acceso vascular. No obstante su duración es limitada y presentan con frecuencia complicaciones, como por ejemplo bacteriemias relacionadas con el catéter de hemodiálisis. Esta, es una complicación con elevada morbimortalidad en los pacientes en tratamiento renal sustitutivo crónico. El objetivo de este análisis fue conocer la incidencia de hospitalizaciones, identificar los gérmenes más frecuentemente relacionados en nuestra población y analizar los factores demográficos y clínicos asociados. Se realizó un estudio observacional prospectivo en el que se analizaron todos los ingresos por bacteriemia relacionada con el catéter de hemodiálisis durante el año 2011. Se recogieron los datos clínicos de los pacientes, demográficos y comorbilidad. El número total de ingresos por bacteriemias relacionadas con el catéter fue de 45 en 35 pacientes, con una edad media de 69.9 años. Los gérmenes más frecuentemente aislados fueron cocos gram positivos (Staphilococcus aureus mecitilin resistente y Staphilococcus aureus meticilin sensible). La mortalidad fue de 14% (5 pacientes). A la vista de nuestros resultados, podemos concluir que la bacteriemia relacionada con el catéter es una complicación grave en los pacientes en hemodiálisis. Representa casi el 50% de los ingresos durante 2011 de los pacientes en hemodiálisis. Está asociada con una elevada morbilidad y consumo de recursos.

The comorbidity between depression and aggression in children and adolescents is an issue that has sparked controversy as its existence has important implications for the validity of the classification systems, for the establishment of explanatory models, the design of new treatments as well as in the final outcome which the comorbid person presents in these in comparison with conventional treatments. In addition, the prevalence rates in depressive-aggressive comorbidity are significant, oscillating between 7.97 and 10.91%. Therefore, the study of comorbidity becomes necessary and the lack of studies focusing on the subject comes as a surprise. Perhaps one of the main problems concerning the research of comorbidity lies in the fact that most of the studies do not validate the clinical criteria that focuses on the principle of synergy, as Clark and Watson had established in Tripartite model, since doing so would require longitudinal studies measuring the effects of a commorbid disorder in contrast to those where there is no comorbidity to be found. In addition to clinical judgment, the Tripartite model demands a further statistic indicating the existence of a significant correlation between those synergistic disorders, which is the one on which most studies have been focusing. This type of results, based solely on clinical judgment, mainly through cross-sectional studies, has not allowed to implement another type of results, as suggested by the Tripartite model, that would have helped to establish clinical and diagnostic criteria through dimensional self-assessment tools which are closer to a reality in child and adolescent assessment where comorbidity is rather the rule than the exception. Therefore, that kind of study, using a longitudinal design over a period of three years, will help expand those cross-sectional ones, which will allow for examining whether there is a significant association, as well as a synergy that attests to the existence of an aggressive-depressive comorbidity on both, statistical and clinical level. In order to do so this study examined the severity and chronicity of a group of comorbid depressive-aggressive persons. In addition, the levels of depression and aggression and the role of sex within these relationships were analyzed. The sample, randomly selected from different schools in the Community of Madrid (Spain), comprised 525 individuals ranging from 11 to 13 years old, 58.9% female, the family structure was mostly biparental (92%) and the vast majority belonged to a middle class environment (85%). Depression and aggression were assessed through specific types of self-report questionnaires for children and adolescents, both in their Spanish version. The results support the statistical basis, since depression and aggression exhibit a significant positive and moderate association ranging between .11 and .24, in which the fact that the found association was higher within verbal aggression than in the physical one among all ages with the exception of the group of subjects to testing aged 12 needs to be stressed. With regards to the clinical criteria, the results provide partial support, as comorbid subjects exhibit a longer duration in chronic aggressive symptoms than those other groups affected only by depression or aggression, while they are similar to those of merely depressive subjects in the symptoms indicating a depression. Regarding severity, comorbid subjects show a higher level within the field of totally and verbally aggressive symptoms, as well as in the depressive ones which makes their physical aggression comparable to the one found in the test group of total aggression, hence, the data partially support the clinical standard. The tested person's sex, however, is of no significant meaning for the outcome. In conclusion, the data indicates the importance of exploring the comorbidity of different types of aggression, particularly the verbal one, and within different age groups. The need for addressing the underlying primary disorder symptoms in long-term affected patients is discussed, since chronic comorbidity may underlie the expression of one of the disorders and entail important implications for diagnosis and treatment.

La comorbilidad entre depresión y agresión infanto-adolescente ha sido contrastada básicamente a un nivel estadístico. Sin embargo, pocos estudios han comprobado de manera longitudinal otra de las premisas fundamentales que permite establecer la comorbilidad: la sinergia, es decir, la acción conjunta de dos o más trastornos que se traduce en una severidad y cronicidad superior a las generadas por la suma de los efectos individuales. Mediante un diseño longitudinal a lo largo de 3 años se examinó la severidad y cronicidad de un grupo de sujetos comórbidos depresivos - agresivos. Se analizaron los niveles de depresión y agresión, así como el papel del sexo en estas relaciones. La evaluación se realizó a través de autoinformes en una muestra de 525 sujetos de edades comprendidas entre los 11 y 13 años. La muestra fue aleatoriamente seleccionada de diferentes colegios de la Comunidad de Madrid (España). Los resultados muestran que la depresión y agresión se relacionan de manera estadísticamente significativa. Los sujetos comórbidos exhiben una cronicidad de mayor duración en las respuestas agresivas que en las depresivas. La severidad en los sujetos comórbidos es mayor en las respuestas agresivas de tipo total y verbal, así como en las depresivas. El sexo no ejerce ningún efecto significativo. Se concluye que los datos indican la importancia de explorar la comorbilidad con diferentes tipos de agresión, especialmente la verbal, y en diferentes grupos de edad. Se discute la necesidad de atender a los síntomas subyacentes al trastorno principal en afectados de larga duración, ya que a la expresión de uno de los trastornos puede subyacer la cronicidad asociada a la comorbilidad con importantes repercusiones para su diagnóstico y tratamiento.

Este experimento se diseñó para evaluar la renovación ABC con un procedimiento de condicionamiento de aversión al sabor (CAS) en tres fases: adquisición, extinción y prueba. Durante la adquisición, 15 ratas Wistar, asignadas a los grupos ABC y ABB, tuvieron acceso a una solución con sacarosa y posteriormente recibieron una inyección de cloruro de litio (LiCl) en el Contexto A. En la extinción, ambos grupos bebieron la solución con sacarosa sin la administración del LiCl en el Contexto B. En la prueba, los grupos tuvieron acceso a la solución con sacarosa sin administrarles LiCl en el contexto de extinción para el grupo ABB, y en un tercer contexto para el grupo ABC. Los resultados mostraron la recuperación de la aversión condicionada al sabor únicamente en el grupo ABC.

This experiment was designed to evaluate ABC renewal in a conditioned taste aversion (CTA) procedure consisting of three phases: acquisition, extinction and test. During the acquisition phase, 15 Wistar rats assigned to groups ABC and ABB had access to a sucrose solution, after which they were injected with lithium chloride (LiCl) in Context A. In the extinction phase, both groups of rats had access to the sucrose solution in Context B, but no LiCl was administered. Finally, during the test, group ABB received sucrose solution without LiCl in the extinction context, while group ABC was tested in a third context. Results showed renewal of conditioned taste aversion only in the ABC group.

Este experimento foi elaborado para avaliar a renovação ABC com um procedimento de condicionamento de aversão ao sabor (CAS) em três fases: aquisição, extinção e prova. Durante a aquisição, 15 ratos Wistar, designados aos grupos ABC e ABB, tiveram acesso a uma solução com sacarose e posteriormente receberam uma injeção de cloreto de lítio (LiCl) em Contexto A. Na extinção, ambos grupos beberam a solução com sacarose sem a administração do LiCl em Contexto B. Na prova, os grupos tiveram acesso à solução com sacarose sem administrar-lhes LiCl num contexto de extinção para o grupo ABB, e num terceiro contexto para o grupo ABC. Os resultados mostraram a recuperação da aversão condicionada ao sabor unicamente no grupo ABC.

The aim of this work was to determine the effects of scopolamine, a cholinergic antagonist, on the conditioning of an instrumental response and the contextual conditioning of this response. Five groups of rats were trained to lever-press on a Variable Interval 30 s schedule in context A. Scopolamine was administered 15 min before each conditioning session to AB 0.01 mg/kg, AB 0.10 mg/kg and AB 1.00 mg/kg groups. The AA Saline and AB Saline groups received saline injections. Contextual conditioning of the lever-pressing response was assessed in one extinction session. The AA group received this extinction session in the conditioning context (A), while the AB groups received this session in a different context (B). Results showed that scopolamine impaired the conditioning of the lever-pressing response but no effects on contextual conditioning were found.

El propósito de este trabajo fue determinar los efectos de la escopolamina, un antagonista colinérgico, sobre el condicionamiento de una respuesta instrumental así como sobre el condicionamiento contextual de esta respuesta. Se entrenó a cinco grupos de ratas a presionar una palanca bajo un programa de Intervalo Variable 30 s en el contexto A. 15 min antes de cada sesión de condicionamiento se administró escopolamina en dosis de 0.01, 0.10 y 1.00 mg/kg a grupos diferentes en el contexto A, mientras dos grupos de ratas recibieron solución salina en el contexto A. El condicionamiento contextual de la respuesta de palanqueo se evaluó en una sesión de extinción en el contexto A o en un contexto B diferente. Los resultados mostraron que la escopolamina obstaculizó el condicionamiento de la respuesta de presionar la palanca pero no se encontraron efectos sobre el condicionamiento contextual.

We report a 34 years old male that while working in forest activities, suffered a blunt trauma caused by the trunk of a tree. On abdominal examination, a bulging on the right upper quadrant with ecchymoses was noted. And abdominal CAT scan showed a great defect of right oblique and transverse abdominis muscles with herniation of the ascending colon. The patient was operated, finding a hemoperitoneum. The abdominal cavity was washed thoroughly and the wall defect was covered with a mesh. The patient had an uneventful postoperative recovery and was discharged nine days later.

Las hernias traumáticas de pared abdominal (HTPA) son una patología poco frecuente. Se definen como la rotura musculofascial causada por un traumatismo directo, sin penetración de la piel ni evidencia de hernia previa en el sitio de la lesión. El 78% son causadas por accidentes viales y en menor frecuencia por patadas de animales, caídas de altura, traumas deportivos, utensilios profesionales y aplastamientos. Presentamos el caso de un paciente masculino de 34 años derivado al Servicio de Urgencia del Hospital de Chillan por atrición toracoabdominal derecha, en faena forestal, cuyo estudio tomográfico revela gran defecto de músculos oblicuos y transversos derechos con herniación de colon ascendente hacia la pared abdominal.