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Little is known about the role of horse flies in potential pathogen transmission in Chile. This study provides evidence of the molecular detection of microorganisms in southern Chile. In the present study, adult Osca lata horse flies were trapped from Punucapa (39°45'06"S/73°16'08"W, Región de Los Ríos) and Puyehue (40°39'10"S/72°10'57"W, Región de Los Lagos), Chile. Among the 95 samples analyzed by PCR using specific primers, microorganisms were detected in 23.2% (n = 22) of the samples. Rickettsia spp. DNA was detected in 15.8% (n = 15) of the samples, Trypanosomatidae DNA in 5.3% (n = 5) of the samples, and filarial DNA in 2.1% (n = 2) of the samples. This study found that horse flies in the region are capable of carrying a variety of both parasites and endosymbionts. Further research is needed to understand the specific impact of horse flies as mechanical or biological vectors and develop effective control measures to prevent the spread of any microorganisms associated with disease.

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Revealing unknown cues that regulate oligodendrocyte progenitor cell (OPC) function in remyelination is important to optimise the development of regenerative therapies for multiple sclerosis (MS). Platelets are present in chronic non-remyelinated lesions of MS and an increase in circulating platelets has been described in experimental autoimmune encephalomyelitis (EAE) mice, an animal model for MS. However, the contribution of platelets to remyelination remains unexplored. Here we show platelet aggregation in proximity to OPCs in areas of experimental demyelination. Partial depletion of circulating platelets impaired OPC differentiation and remyelination, without altering blood-brain barrier stability and neuroinflammation. Transient exposure to platelets enhanced OPC differentiation in vitro, whereas sustained exposure suppressed this effect. In a mouse model of thrombocytosis (Calr+/-), there was a sustained increase in platelet aggregation together with a reduction of newly-generated oligodendrocytes following toxin-induced demyelination. These findings reveal a complex bimodal contribution of platelet to remyelination and provide insights into remyelination failure in MS.

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Introducción: La valoración de las comidas tradicionales resulta esencial para mantener el patrimonio gastronómico, sin embargo, su divulgación es limitada, por lo que se requiere de estrategias comunicacionales que promuevan la difusión de las culturas inmateriales. Objetivo: Elaborar un modelo de co-construcción de cápsulas comunicacionales intergeneracionales para difundir preparaciones culinarias significativas de personas mayores. Material y métodos: El estudio se enmarca en la investigación aplicada del tipo tecnológico. Se realizó una búsqueda teórica de aspectos relevantes en el uso de cápsulas comunicacionales (videos), así como el uso de TICs en personas mayores, siguiendo los lineamentos del diseño cualitativo a través de un análisis de contenido temático. Luego se construye un modelo, que es validado por profesionales del área gerontológica, para ser aplicado en un proyecto piloto que incluyó a una diada constituida por una persona mayor y un descendiente, los que guiaron y grabaron una entrevista en profundidad focalizada. Resultados: Se co-construyeron 6 videos con preparaciones culinarias tradicionales en el que participaron 5 mujeres y 1 hombre, de las Regiones del Biobío y Metropolitana. Se siguió modelo teórico que incorporó 7 pasos para su elaboración: identificación de diada intergeneracional, capacitación, realización del video, primera edición del video, presentación del video a la diada, edición final y difusión del video en redes sociales. Conclusiones: Como estrategia para un envejecimiento saludable, la realización de un video intergeneracional con una receta preferida se visualiza como una oportunidad para entrelazar cultura, patrimonio y emociones entre los participantes y la comunidad.

Introduction: The appreciation of traditional foods is essential in the maintenance of gastronomic heritage; however, its dissemination is limited, which is why communication strategies are required to promote the dissemination of intangible cultures. Objective: To develop a model for the co-construction of intergenerational communication capsules that allow the dissemination of significant culinary preparations for the elderly. Material and methods: The study is part of an applied technological research. In order to consolidate knowledge and use it for educational purposes, a theoretical search of relevant aspects in the use of communication capsules (videos) was carried out, following the guidelines of qualitative design through thematic content analysis. Then, a model is constructed and validated by professionals from the gerontological area to be applied to a pilot project that included a dyad made up of an elderly person and a descendant, who guided and recorded an in-depth focused interview. Results: A total of 6 videos about traditional culinary preparations made by 5 women and 1 man from the Biobío and Metropolitana Regions were co-constructed. A theoretical model that incorporated 7 steps for its elaboration was followed: identification of intergenerational dyad, training, making of the video, first edition of the video, presentation of the video to the dyad, final edition, and dissemination of the video on social networks. Conclusions: As a strategy for healthy aging, making an intergenerational video with a favorite recipe is seen as an opportunity to intertwine culture, heritage and emotions between participants and the community.

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Nonalcoholic fatty liver disease (NAFLD) describes a spectrum of liver abnormalities, from benign steatosis to nonalcoholic steatohepatitis (NASH). Because of their antioxidant capabilities, CeNPs have sparked a lot of interest in biological applications. This review evaluated the effectiveness of CeNPs in NAFLD evolution through in vivo and in vitro studies. Databases such as MEDLINE, EMBASE, Scopus, and Web of Science were looked for studies published between 2012 and June 2023. Quality was evaluated using PRISMA guidelines. We looked at a total of nine primary studies in English carried out using healthy participants or HepG2 or LX2 cells. Quantitative data such as blood chemical markers, lipid peroxidation, and oxidative status were obtained from the studies. Our findings indicate that NPs are a possible option to make medications safer and more effective. In fact, CeNPs have been demonstrated to decrease total saturated fatty acids and foam cell production (steatosis), reactive oxygen species production and TNF-α (necrosis), and vacuolization in hepatic tissue when used to treat NAFLD. Thus, CeNP treatment may be considered promising for liver illnesses. However, limitations such as the variation in durations between studies and the utilization of diverse models to elucidate the etiology of NAFLD must be considered. Future studies must include standardized NAFLD models.

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Discoidin domain receptor 1 (DDR1) is a tyrosine kinase receptor expressed in epithelial cells from different tissues in which collagen binding activates pleiotropic functions. In the brain, DDR1 is mainly expressed in oligodendrocytes (OLs), the function of which is unclear. Whether collagen can activate DDR1 in OLs has not been studied. Here, we assessed the expression of DDR1 during in vitro OL differentiation, including collagen IV incubation, and the capability of collagen IV to induce DDR1 phosphorylation. Experiments were performed using two in vitro models of OL differentiation: OLs derived from adult rat neural stem cells (NSCs) and the HOG16 human oligodendroglial cell line. Immunocytofluorescence, western blotting, and ELISA were performed to analyze these questions. The differentiation of OLs from NSCs was addressed using oligodendrocyte transcription factor 2 (Olig2) and myelin basic protein (MBP). In HOG16 OLs, collagen IV induced DDR1 phosphorylation through slow and sustained kinetics. In NSC-derived OLs, DDR1 was found in a high proportion of differentiating cells (MBP+/Olig2+), but its protein expression was decreased in later stages. The addition of collagen IV did not change the number of DDR1+/MBP+ cells but did accelerate OL branching. Here, we provide the first demonstration that collagen IV mediates the phosphorylation of DDR1 in HOG16 cells and that the in vitro co-expression of DDR1 and MBP is associated with accelerated branching during the differentiation of primary OLs.

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Introducción: los aneurismas de la arteria esplénica son los más frecuentes de aquellos que asientan en arterias viscerales. La existencia de múltiples aneurismas esplénicos es rara, existiendo pocos casos publicados. Generalmente son asintomáticos y constituyen un hallazgo, es poco frecuente la presentación en nuestra paciente, con dolor inespecífico de hemiabdomen superior. Existen diferentes alternativas terapéuticas, son de primera línea la angio-embolización y colocación de stent endovasculares, tienen como principales limitantes el tamaño del aneurisma y la tortuosidad de la arteria esplénica que dificultan acceso endovascular. El tratamiento quirúrgico queda reservado, para situaciones especiales. Puede realizarse con conservación esplénica (actuando únicamente sobre el aneurisma) o mediante esplenectomía. Descripción de contenido: el video presenta un caso clínico, de aneurismas múltiples de arteria esplénica. El mismo expone presentación clínica, diagnóstico, opciones terapéuticas y la optada en este caso: esplenectomía laparoscópica. Conclusiones: se trata de una entidad poco frecuente, por lo que consideramos fundamental la comunicación del caso. Si bien generalmente constituyen un hallazgo imagenológico, resulta de vital importancia el tratamiento oportuno a fin de prevenir complicaciones graves como la rotura del aneurisma. Ver video en: https://www.youtube.com/watch?v=5IS2BxgeuxY

Introduction: splenic artery aneurysms are the most frequent kind among aneurysms in visceral arteries. The existence of multiple aneurysms is rather unusual, there being few cases published. In general they constitute findings as they are asymptomatic. The presentation of the patient in the study, with non-specific upper abdominal pain is rather infrequent. Among the different therapeutic options, angio-embolization and the collocation of endovascular stents are the front line approaches, the main limitations being the size of the aneurysm and the tortuous nature of the splenic artery which makes endovascular access difficult. Surgical treatment is reserved for special situations and it May preserve the spleen (only acting on the aneurysm) or may involve a splenectomy. Content description: the video presents a clinical case of multiple splenic artery aneurysms covering clinical presentation, diagnosis and therapeutic options - the chosen one in this case being laparoscopic spenectomy. Conclusions: it is rather an unusual condition, and therefore dissemination of the case is key. Despite their generally being image studies findings, it is of the essence to apply timely therapy to prevent serious complications like the rupture of the aneurysm. Watch video at: https://www.youtube.com/watch?v=5IS2BxgeuxY

Introdução: os aneurismas da artéria esplênica são os mais comuns nas artérias viscerais. A existência de múltiplos aneurismas esplênicos é rara, com poucos casos publicados. Geralmente são assintomáticos e constituem um achado acidental, sendo rara a apresentação observada na nossa paciente, com dor inespecífica no hemiabdome superior. Existem diferentes alternativas terapêuticas sendo a angioembolização e a colocação de stent endovascular as de primeira linha, suas principais limitações são o tamanho do aneurisma e a tortuosidade da artéria esplênica que dificultam o acesso endovascular. O tratamento cirúrgico é reservado para situações especiais. Pode ser realizada com preservação esplênica (atuando apenas no aneurisma) ou por esplenectomia. Descrição do conteúdo: o vídeo apresenta um caso clínico de múltiplos aneurismas de artéria esplênica. Expõe apresentação clínica, diagnóstico, opções terapêuticas e a escolhida neste caso: esplenectomia laparoscópica. Conclusões: é uma entidade rara, pelo que consideramos essencial a comunicação do caso. Embora geralmente constituam um achado de imagem, o tratamento oportuno é de vital importância para evitar complicações graves, como a ruptura do aneurisma. Veja o vídeo em: https://www.youtube.com/watch?v=5IS2BxgeuxY

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El incremento de la malnutrición por exceso fundamenta la necesidad de revalorar el rol de los ambientes alimentarios en el bienestar y la seguridad alimentaria de la población. La presente revisión bibliográfica tiene como objetivo realizar una búsqueda descriptiva de los ambientes alimentarios y de cómo estos condicionan los estados de malnutrición por exceso y la seguridad alimentaria de la población. A través de una indagación narrativa en motores de búsqueda y bases de datos (Medline, Scielo, Scopus, Biblioteca Virtual de Salud, Medes y Google Académico), se identificaron artículos originales o revisiones en castellano e inglés publicadas entre los años 2017 al 2021 que respondieron a los propósitos del estudio. Se incluyeron 56 artículos, los cuales permitieron profundizar en las cinco categorías teóricas: ambiente alimentario institucional y organizacional, de restauración, vía pública, abastecimiento y domiciliario; así como en el modo en que estos entornos potencian la malnutrición por exceso y tensionan la seguridad alimentaria de la población. Los distintos ambientes o entornos alimentarios direccionan los estilos de vida y el bienestar de las personas y comunidades, además de influir en la etiología y mantención de la malnutrición por exceso y la seguridad alimentaria de la población.

The increase in malnutrition due to excess supports the need to reassess the role of food environments in the well-being and food security of the population. The objective of this bibliographic review is to carry out a descriptive search of food environments and how these condition states of malnutrition due to excess and the food security of the population. Through a narrative investigation in search engines and databases (Medline, Scielo, Scopus, Virtual Health Library, Medes and Google Scholar), original articles or reviews in Spanish and English published between 2017 and 2021 were identified, served the purposes of the study. 56 articles were included, which allowed to study in more detail the five theoretical categories: institutional and organizational food environment, restoration, public thoroughfare, supply and home; as well as in the way in which these environments enhance malnutrition due to excess and put pressure on the food security of the population. The different environments or food environments direct the lifestyles and well-being of people and communities, in addition to influencing the etiology and maintenance of malnutrition due to excess and the food security of the population.

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Chagas disease is an anthropozoonotic disease caused by the protozoan Trypanosoma cruzi, transmitted by triatomine vectors. In Chile, there are four species of triatomine bugs that are potential vectors of T. cruzi, being Triatoma infestans the main vector in endemic areas of the country. The "Programa Nacional de Control Vectorial de la Enfermedad de Chagas de Chile" has significantly reduced the rates of home infestation to less than 1% and has interrupted vectorial transmission since 1999. The objective of this study was to evaluate the impact of vectorial control and the continuity of the interruption of vectorial transmission in northern Chile (provincia de El Loa, región de Antofagasta). The study comprised fingerstick blood samples of 2104 children, attending local school, venous blood samples of 65 dogs, associated to houses with T. infestans unique findings and vector infestation, and intestine samples of 284 T. infestans specimens, from the provincia de El Loa, during 2014-2016 period. The samples were analyzed by enzyme-linked immunosorbent assay (ELISA), indirect immunofluorescence and/or polymerase chain reaction (PCR) techniques. A total of 5 children (0.24%), 7 dogs (10.8%), and 6 specimens of T. infestans (2.1%) resulted positive to T. cruzi infection. This study showed that the risk of transmission of Chagas disease is low in the north of Chile (provincia de El Loa), detected a low positive rate of chagasic children and of infected triatomine bugs, and showed the existence of T. cruzi transmission in dogs, which are used as natural sentinels for the detection of T. cruzi infection, being especially useful during surveillance program in human population characterized by low seroprevalence.

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The extreme north of Chile presents a subtropical climate permissive of the establishment of potential disease vectors. Anopheles (Ano.) pseudopunctipennis is distributed from the south of the United States to the north of Argentina and Chile, and is one of the main vectors of malaria in Latin America. Malaria was eradicated from Chile in 1945. Nevertheless, the vector persists in river ravines of the Arica and Tarapacá regions. The principal effect of climate change in the north of Chile is temperature increase. Precipitation prediction is not accurate for this region because records were erratic during the last century. The objective of this study was to estimate the current and the projected distribution pattern of this species in Chile, given the potential impact due to climate change. We compiled distributional data for An. (Ano.) pseudopunctipennis and constructed species distribution models to predict the spatial distribution of this species using the MaxEnt algorithm with current and RCP 4.5 and 8.5 scenarios, using environmental and topographic layers. Our models estimated that the current expected range of An. (Ano.) pseudopunctipennis extends continuously from Arica to the north of Antofagasta region. Furthermore, the RCP 4.5 and 8.5 projected scenarios suggested that the range of distribution of An. (Ano.) pseudopunctipennis may increase in longitude, latitude, and altitude limits, enhancing the local extension area by 38 and 101%, respectively, and local presence probability (>0.7), from the northern limit in Arica y Parinacota region (18°S) to the northern Antofagasta region (23°S). This study contributes to geographic and ecologic knowledge about this species in Chile, as it represents the first local study of An. (Ano.) pseudopunctipennis. The information generated in this study can be used to inform decision making regarding vector control and surveillance programs of Latin America. These kinds of studies are very relevant to generate human, animal, and environmental health knowledge contributing to the "One Health" concept.

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Oscillatory neural activity in the cortico-basal ganglia-thalamocortical (CBGTC) loop is associated with the motor state of a subject, but also with the availability of modulatory neurotransmitters. For example, increased low-frequency oscillations in Parkinson's disease (PD) are related to decreased levels of dopamine and have been proposed as biomarkers to adapt and optimize therapeutic interventions, such as deep brain stimulation. Using neural oscillations as biomarkers require differentiating between changes in oscillatory patterns associated with parkinsonism vs. those related to a subject's motor state. To address this point, we studied the correlation between neural oscillatory activity in the motor cortex and striatum and varying degrees of motor activity under normal and parkinsonian conditions. Using rats with bilateral or unilateral 6-hydroxydopamine lesions as PD models, we correlated the motion index (MI)-a measure based on the physical acceleration of the head of rats-to the local field potential (LFP) oscillatory power in the 1-80 Hz range. In motor cortices and striata, we observed a robust correlation between the motion index and the oscillatory power in two main broad frequency ranges: a low-frequency range [5.0-26.5 Hz] was negatively correlated to motor activity, whereas a high-frequency range [35.0-79.9 Hz] was positively correlated. We observed these correlations in both normal and parkinsonian conditions. In addition to these general changes in broad-band power, we observed a more restricted narrow-band oscillation [25-40 Hz] in dopamine-denervated hemispheres. This oscillation, which seems to be selective to the parkinsonian state, showed a linear frequency dependence on the concurrent motor activity level. We conclude that, independently of the parkinsonian condition, changes in broad-band oscillatory activities of cortico-basal ganglia networks (including changes in the relative power of low- and high-frequency bands) are closely correlated to ongoing motions, most likely reflecting he operations of these neural circuits to control motor activity. Hence, biomarkers based on neural oscillations should focus on specific features, such as narrow frequency bands, to allow differentiation between parkinsonian states and physiological movement-dependent circuit modulation.

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Resumen: Introducción: el infarto segmentario idiopático de epiplón mayor es una excepcional causa de cuadro agudo de abdomen en el adulto. Caso clínico: se presenta el caso de un adulto joven que se operó de urgencia con diagnóstico de apendicitis aguda y el abordo por vía laparoscópica, comprobándose en la exploración un infarto segmentario de epiplón mayor que se resolvió mediante la omentectomía parcial con buena evolución y alta precoz. Discusión: si bien el diagnóstico imagenológico de infarto de epiplón mayor es posible dada su baja incidencia y las características de presentación clínica, su diagnóstico habitualmente es intraoperatorio. Su tratamiento es la omentectomía laparoscópica del sector afectado. Con diagnóstico preoperatorio, puede admitirse una conducta expectante, aunque la persistencia de la sintomatología es causa de reingreso y prolongación del tratamiento definitivo.

Summary: Introduction: idiopathic segmental infarction of the greater omentum constitutes an exceptional cause of an acute condition in adults. Clinical case: study presents the clinical case of a young adult who underwent an emergency laparoscopic appendectomy for the treamtent of acute apenditicis. The exploration revealed a segmental infarction of the greater omentum that was resolved by partial omentectomy. Evolution was good and the patient was allowed an early discharge. Discussion: despite the fact an image diagnosis of infarction of the greater omentum is possible, its low incidence and the characteristics of its clinical presentation result in it usually being diagnosed during surgery. Treatment consists in laparoscopic omentenctomy of the affected area. Preoperative diagnosis may allow for watchful waiting, although persistence of symptoms requires readmission to hospital and extension of the definitive treatment.

Resumo: Introdução: o infarto segmentar idiopático do grande omento é uma causa excepcional de quadro agudo de abdômen no adulto. Caso clínico: apresenta-se um caso clínico de um adulto jovem operado de urgência por via laparoscópica com diagnóstico de apendicite aguda comprovando-se na exploração um infarto segmentar de grande omento solucionado por uma omentectomia parcial com boa evolução e alta precoce. Discussão: embora o diagnóstico por técnicas de imagem de infarto do grande omento seja possível, seu diagnóstico habitualmente es intraoperatório devido à sua baja incidência e as características da apresentação clínica. O tratamento é a omentectomia laparoscópica do segmento afetado. Com diagnóstico pré-operatório, pode-se admitir uma conduta expectante, embora a persistência de sintomatologia é causa de re-internação e prolongamento do tratamento definitivo.

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Resumen: Introducción: el ganglioneuroma suprarrenal es un tumor benigno excepcional originado en las células nerviosas derivadas de la cresta neural. El objetivo de este trabajo es comunicar un caso clínico de un ganglioneuroma suprarrenal derecho sintomático. Caso clínico: paciente de 37 años, sexo femenino, que consultó por dolor abdominal inespecífico que luego de la valoración imagenológica y estudio funcional hormonal, se diagnosticó una tumoración suprarrenal derecha no funcionante. Con dicho diagnóstico se realizó la adrenalectomía por abordaje convencional retroperitoneal y el estudio anatomopatológico de la pieza diagnosticó un ganglioneuroma. Discusión: los ganglioneuromas habitualmente son asintomáticos y no funcionantes, por lo que su diagnóstico es incidental en un alto porcentaje de casos. Otros se presentan con una sintomatología inespecífica. Su diagnóstico etiológico preoperatorio raramente es realizado y su confirmación es anatomopatológica. Tienen indicación quirúrgica los sintomáticos, los que superan los 6 cm, o persisten dudas diagnósticas de malignidad. El pronóstico es bueno, siendo excepcional la recidiva.

Summary: Introduction: adrenal ganglioneuroma is an exceptional benign tumour which originates from neural crest cells. The study aims to inform about a clinical case of asymptomatic right adrenal ganglioneuroma. Clinical case: 37-year old patient, female, who consulted for non-specific abdominal pain which, after imaging assessment and functional and hormone test was diagnosed with non-functioning tumour of the right adrenal gland. Upon this diagnosis, adrenalectomy using the conventional retroperitoneal approach was performed, and the pathology study of the piece confirmed the diagnosis of ganglioneuroma. Discussion: ganglioneuromas are usually asymptomatic and non-functioning, so diagnosis is incidental in a large percentage of cases. Others present non-specific symptoms. Preoperative etiological diagnosis is rare, and confirmation is usually after pathology study. Symptomatic tumours over 6cm long have an indication of surgery, as well as those suspicious of malignancy. Prognosis is good, relapses being exceptional.

Resumo: Introdução: o ganglioneuroma suprarrenal é um tumor benigno excepcional originado nas células nervosas derivadas da crista neural. O objetivo deste trabalho é descrever o caso clínico de um ganglioneuroma suprarrenal direito sintomático. Caso clínico: paciente de 37 anos, sexo feminino que consultou por dor abdominal inespecífica que foi diagnosticado como uma tumoração suprarrenal direita não funcionante depois da avaliação de estudos de imagem e funcional hormonal. Com este diagnóstico realizou-se adrenalectomia por abordagem convencional retroperitoneal e o laudo anatomopatológico diagnosticou um ganglioneuroma. Discussão: os ganglioneuromas geralmente são assintomáticos e não funcionantes por isso seu diagnóstico é acidental em uma alta proporção dos casos. Outros se apresentam com sintomatologia inespecífica. O diagnóstico etiológico pré-operatório raramente é realizado e sua confirmação é feita pela anatomia patológica. Quando são sintomáticos, têm mais de 6 cm ou se persistem dúvidas sobre sua malignidade têm indicação cirúrgica. O prognóstico é bom, e a recidiva é excepcional.

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Multiple sclerosis (MS) is an inflammatory demyelinating disease of the central nervous system (CNS). Upon demyelination, oligodendrocyte progenitor cells (OPCs) are activated and they proliferate, migrate and differentiate into myelin-producing oligodendrocytes. Besides OPCs, neural stem cells (NSCs) may respond to demyelination and generate oligodendrocytes. We have recently shown that CNS-resident pericytes (PCs) respond to demyelination, proliferate and secrete Laminin alpha2 (Lama2) that, in turn, enhances OPC differentiation. Here, we aimed to evaluate whether PCs influence the fate choice of NSCs in vitro, towards the production of new myelin-producing cells. Indeed, upon exposure to conditioned medium derived from PCs (PC-CM), the majority of NSCs gave rise to GalC- and myelin basic protein (MBP)-expressing oligodendrocytes at the expense of the generation of GFAP-positive astrocytes. Consistent with these findings, PC-CM induces an increase in the expression of the oligodendrocyte fate determinant Olig2, while the expression level of the astrocyte determinant ID2 is decreased. Finally, pre-incubation of PC-CM with an anti-Lama2 antibody prevented the generation of oligodendrocytes. Our findings indicate that PCs-derived Lama2 instructs NSCs to an oligodendrocyte fate choice favoring the generation of myelin-producing cells at the expense of astrocytes in vitro. Further studies aiming to reveal the role of PCs during remyelination may pave the way for the development of new therapies for the treatment of MS.

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Abstract Introduction: Focused critical care echocardiography (FCCE) has become a necessary competency for physicians working in pediatric intensive care units. Objective: To asses a theoretical and practical training program designed to explore skills acquisition for obtaining views and some echocardiographic measurements suggested for FCCE. Materials and methods: A 26-hour long theoretical and practical training for pediatricians and pediatric intensivists under the guidance of a pediatric cardiologist. The program included qualitative analysis of the variables pertaining to basic echocardiographic windows, and quantitative analysis of FCCE. Results: There were significant differences between having prior echocardiography knowledge, associated with a higher score in the 4-chamber apical window (mean: 9.0; standard deviation [SD]: 1.02; P = 0.021), and better correlation with the pediatric cardiologist regarding left ventricular function measurements (mean: 92.02; SD: 6.3; P = 0.036). Conclusion: The program was useful for basic level training in FCCE with an optimal level of acquisition of the main echocardiographic windows and some echocardiographic measurements.

Resumen Introducción: La ecocardiografía, enfocada al cuidado crítico, se ha convertido hoy en día en una competencia necesaria del médico que labora en las unidades de cuidado intensivo pediátrico. Objetivo: Evaluar un programa de entrenamiento te6rico y práctico, diseñado para explorar la adquisición de habilidades en la obtención de imágenes y algunas medidas ecocardiográficas sugeridas para la ecocardiografía enfocada al cuidado crítico. Materiales y métodos: Se realizó un entrenamiento teórico-práctico, de 26 horas de duración, por médicos pediatras y pediatras intensivistas, bajo la tutoría de un cardiólogo pediatra. El programa incluyó análisis cualitativos de las variables pertenecientes a las ventanas básicas y cuantitativos de la ecocardiografía enfocada al cuidado crítico. Resultados: Las diferencias significativas se presentaron entre tener conocimientos previos en ecocardiografía, que se asoció a un mejor puntaje en la ventana apical cuatro cámaras (media: 9,0 DE: 1,02 P = 0,021), y mejor correlación con el cardiólogo pediatra en la medición de la funcionalidad del ventrículo izquierdo (media:92,2 DE:6,3 P = 0,036). Conclusiones: Este programa de entrenamiento fue útil para el entrenamiento en nivel básico de la ecocardiografía enfocada al cuidado crítico, con un nivel óptimo en la adquisición de las principales ventanas ecocardiográficas, y para la toma de algunas medidas ecocardiográficas.

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The species of the genus Mepraia Mazza, Gajardo Tobar and Jörg (Hemiptera, Reduviidae:Triatominae) exhibit polymorphism in their hemelytra. The females of all species are always micropterous, but the males can be micropterous, brachypterous, or macropterous. Mepraia gajardoi Frías, Henry and González (Hemiptera: Reduviidae) males are always brachypterous, Mepraia parapatrica Frías-Lasserre (Hemiptera: Reduviidae) males are macropterous or brachypterous and Mepraia spinolai (Porter) (Hemiptera: Reduviidae) males are macropterous, brachypterous, or micropterous. Here, we determined distinctive characteristics of the hemelytra of the males of these three species and found that the length of the hemelytra of the brachypterous males in these three species differs statistically, as does their shape and morphology. These differences are particularly apparent at the apex of the hemelytra, the anterior part of the corium, in the morphology and number of the ctenidia of coaptors, and presence or absence of the cross vein of the hemelytra. Based on this, we propose a key based on hemelytra characteristics to identify the males of the three Mepraia species.

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BACKGROUND: burnout syndrome is a significant problem in nursing professionals. Although, the unit where nurses work may influence burnout development. Nurses that work in primary care units may be at higher risk of burnout. The aim of the study was to estimate the prevalence of emotional exhaustion, depersonalization and low personal accomplishment in primary care nurses. METHODS: We performed a meta-analysis. We searched Pubmed, CINAHL, Scopus, Scielo, Proquest, CUIDEN and LILACS databases up to September 2017 to identify cross-sectional studies assessing primary care nurses' burnout with the Maslach Burnout Inventory were included. The search was done in September 2017. RESULTS: After the search process, n = 8 studies were included in the meta-analysis, representing a total sample of n = 1110 primary care nurses. High emotional exhaustion prevalence was 28% (95% Confidence Interval = 22-34%), high depersonalization was 15% (95% Confidence Interval = 9-23%) and 31% (95% Confidence Interval = 6-66%) for low personal accomplishment. CONCLUSIONS: Problems such as emotional exhaustion and low personal accomplishment are very common among primary care nurses, while depersonalization is less prevalent. Primary care nurses are a burnout risk group.

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As part of a bioprospecting program aimed at the discovery of undescribed natural products from Salvadoran and Peruvian flora, the phytochemical investigations of four Celastraceae species, Celastrus vulcanicola, Maytenus segoviarum, Maytenus jeslkii, and Maytenus cuzcoina, were performed. The current study reports the isolation and structural characterization of five previously undescribed macrolide sesquiterpene pyridine alkaloids, named vulcanicoline-A, cuzcoinine, vulcanicoline-B, jelskiine, and vulcanicoline-C, along with sixteen known alkaloids. The structures of the alkaloids were established by spectrometric and extensive 1D and 2D NMR spectroscopic analysis, including COSY, HSQC, HMBC, and ROESY experiments. The absolute configurations of alkaloids were proposed based on optical rotation sign, and biogenetic considerations. This study represents the first phytochemical analysis of Maytenus segoviarum.

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Aedes (Ochlerotatus) sallumae González & Reyes n. sp. is described and validated using morphological characters of the adult male and female, male genitalia and immature stages, and its cytochrome oxidase unit 1 mitochondrial gene sequence (COI). Aedes (Och.) sallumae is morphologically close to Ae. (Och.) albifasciatus (Macquart). However, these species can be distinguished based on characters of the males and females, male genitalia and fourth-instar larvae. Aedes (Och.) sallumae was collected in the geographically isolated desert zone of northern Chile, the Atacama Desert. This isolation suggests allopatric speciation, with Ae. (Och.) sallumae divergent from its sister species Ae. (Och.) albifasciatus. Molecular characterization showed a difference of more than 8% between these species, supporting their recognition as different species.

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Este artículo examina algunos de los significados otorgados por los jóvenes bogotanos al sindicalismo y al trabajo. Se realizaron nueve entrevistas etnográficas a igual número de jóvenes, provocando la narración de su vida como trabajadores y/o como trabajadores-sindicalizados. Como marco al proceso de indagación, se revisó bibliografía relacionada con los siguientes problemas: la construcción social de la categoría "joven" y su delimitación conceptual; las transformaciones contemporáneas del mundo del trabajo y su relación con las condiciones sociolaborales que enfrentan los jóvenes actualmente, explorando aspectos del surgimiento del movimiento obrero en Colombia y su estado actual en comparación con otros países de la región. Se abordó la pregunta de investigación: ¿cuáles son los significados asociados al trabajo y al sindicalismo, construidos por jóvenes trabajadores habitantes de Bogotá?, examinando las entrevistas a partir de la propuesta de análisis de discurso de los psicólogos sociales Jonathan Potter y Margaret Wheterell (1996), basada en la identificación de repertorios interpretativos. Finalmente, se discutieron los resultados encontrados, señalando la tensión emergente entre dos perspectivas narrativas de los jóvenes trabajadores, según tengan o no relación con el movimiento sindical.

This article aims to examine the meanings that, nowadays, young people give to work and unionism. Nine ethnographic interviews with young workers were conducted about their working life as unionized and non-unionized workers. The conceptual framed was composed by a review of the literature related to the following topics: the social construction of young people, the contemporary transformation of work and the history of unionism in Colombia. The research question was addressed by identifying the participant's interpretative repertories (Potter y Wheterell, 1996). The results show a tension between the repertoires used by young workers according to their position as union or non-union members.

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BACKGROUND: Alloimmunization is an adverse effect of blood transfusions. In Chile, alloimmunization frequency is not established, and for this reason the aim of this study was to investigate the prevalence and specificity of red blood cell (RBC) alloantibodies in Chilean transfused subjects. METHODS: Records from 4,716 multi-transfused patients were analyzed. In these patients, antibody screening was carried out prior to cross-matching with a commercially available two-cell panel by the microcolum gel test, and samples with a positive screen were analyzed for the specificity of the alloantibody with a 16-cell identification panel. RESULTS: The incidence of RBC alloimmunization in transfused patients was 1.02% (48/4,716) with a higher prevalence in women (40/48). We detected 52 antibodies, the most frequent specificities identified were anti-E (30.8%), anti-K (26.9%), anti-D (7.7%), and anti-Fy(a) (5.8%). The highest incidence of alloantibodies was observed in cancer and gastroenterology patients. CONCLUSION: The data demonstrated a low alloimmunization frequency in Chilean transfused patients, principally associated with antibodies anti-E, anti-K, anti-D, and anti-Fy(a).