Uso de la realidad aumentada para el desarrollo de habilidades matemáticas tempranas

El perfeccionamiento del sentido numérico durante la primera infancia es la base sobre la que se asienta el desarrollo posterior de la cognición numérica y de las habilidades matemáticas. Esta investigación evaluó los aportes de la realidad aumentada como apoyo a la enseñanza de los conceptos matemáticos en la educación preescolar, empleando un enfoque de tipo mixto con un diseño cuasiexperimental para comprobar el desarrollo de la competencia numérica temprana en estudiantes entre 5 y 6 años en el contexto de la pandemia. La medición del rendimiento se hizo mediante la aplicación de la prueba de Evaluación de Matemática Temprana TEMA-3. Como principal resultado, se evidencia que un ambiente de aprendizaje mediado por realidad aumentada favorece el aprendizaje del concepto de número en la educación preescolar. Los resultados de las pruebas inicial y final determinan los avances en el aprendizaje del grupo en el aprendizaje de pensamiento matemático formal

Risk factors for developing ventilator-associated lower respiratory tract infection in patients with severe COVID-19: a multinational, multicentre study, prospective, observational study

Medical research; VirologyInvestigación médica, VirologíaRecerca mèdica; VirologiaAround one-third of patients diagnosed with COVID-19 develop a severe illness that requires admission to the Intensive Care Unit (ICU). In clinical practice, clinicians have learned that patients admitted to the ICU due to severe COVID-19 frequently develop ventilator-associated lower respiratory tract infections (VA-LRTI). This study aims to describe the clinical characteristics, the factors associated with VA-LRTI, and its impact on clinical outcomes in patients with severe COVID-19. This was a multicentre, observational cohort study conducted in ten countries in Latin America and Europe. We included patients with confirmed rtPCR for SARS-CoV-2 requiring ICU admission and endotracheal intubation. Only patients with a microbiological and clinical diagnosis of VA-LRTI were included. Multivariate Logistic regression analyses and Random Forest were conducted to determine the risk factors for VA-LRTI and its clinical impact in patients with severe COVID-19. In our study cohort of 3287 patients, VA-LRTI was diagnosed in 28.8% [948/3287]. The cumulative incidence of ventilator-associated pneumonia (VAP) was 18.6% [610/3287], followed by ventilator-associated tracheobronchitis (VAT) 10.3% [338/3287]. A total of 1252 bacteria species were isolated. The most frequently isolated pathogens were Pseudomonas aeruginosa (21.2% [266/1252]), followed by Klebsiella pneumoniae (19.1% [239/1252]) and Staphylococcus aureus (15.5% [194/1,252]). The factors independently associated with the development of VA-LRTI were prolonged stay under invasive mechanical ventilation, AKI during ICU stay, and the number of comorbidities. Regarding the clinical impact of VA-LRTI, patients with VAP had an increased risk of hospital mortality (OR [95% CI] of 1.81 [1.40–2.34]), while VAT was not associated with increased hospital mortality (OR [95% CI] of 1.34 [0.98–1.83]). VA-LRTI, often with difficult-to-treat bacteria, is frequent in patients admitted to the ICU due to severe COVID-19 and is associated with worse clinical outcomes, including higher mortality. Identifying risk factors for VA-LRTI might allow the early patient diagnosis to improve clinical outcomes. Trial registration: This is a prospective observational study; therefore, no health care interventions were applied to participants, and trial registration is not applicable.This work was supported by the SEMICYUC (Spanish Society of Intensive Care Medicine and Coronary Units) and the Universidad de La Sabana, Chía, Colombia (LFR). All authors were not precluded from accessing data in the study, and they accept responsibility for submitting it for publication

Trayectorias escolares de los estudiantes con discapacidad graduados de la institución educativa San José de Marinilla

El presente texto propone una mirada crítica, política, pedagógica y social de las trayectorias escolares que construyeron las personas con discapacidad de la institución Educativa de San José de Marinilla, que se hayan graduado en el periodo académico comprendido entre los años 2010 - 2017. En la medida que se visualiza una construcción de la forma en que se estructuran las competencias necesarias para el ingreso al mundo laboral y/o académico superior de las personas con discapacidad en este contexto. En esta perspectiva, la identificación de dichas trayectorias permite reconstruir también formas y mecanismos de vinculación de las familias y otras instituciones que se constituyen en la red de apoyo necesaria para garantizar los derechos de las personas con discapacidad en nuestros contextos; en una dialéctica discursiva que posibilita el dialogo entre las pretensiones jurídico/documentales y las expectativas e incluso realidades de vida posterior al ejercicio de la inclusión escolar de esta población. Finalmente se propone también un ejercicio pedagógico de reconocimiento formativo en miras a una relación teórico/prospectiva de la garantía de los derechos de las personas con discapacidad incluso en sus propias construcciones que atañen a posicionar a estas personas en los lugares históricamente determinados para mantener los espacios de invisibilización y utilización amañada en el acto de caridad incluyente, o por el contrario el asomo de unas acciones que posibilitan las expresiones con tintes de reconocimiento y emancipación de subjetividades como la de las personas con discapacidad que habitan en zonas rurales como el municipio de Marinilla.This text proposes a critical, political, pedagogical and social view of the school careers that people with disabilities built at the Educational Institution of San José de Marinilla, who have graduated in the academic period from 2010 to 2017. In the measure that visualizes a construction of the way in which the necessary competences are structured for the entry into the labor and / or higher academic world of people with disabilities in this context. In this perspective, the identification of these trajectories also makes it possible to reconstruct forms and mechanisms for linking families and other institutions that constitute the support network necessary to guarantee the rights of people with disabilities in our contexts; in a discursive dialectic that enables a dialogue between the legal / documentary claims and the expectations and even realities of life after the exercise of school inclusion of this population. Finally, a pedagogical exercise of formative recognition is also proposed with a view to a theoretical / prospective relationship of the guarantee of the rights of people with disabilities, even in their own constructions that concern positioning these people in historically determined places to maintain spaces of invisibility and rigged use in the act of inclusive charity, or on the contrary, the appearance of actions that allow expressions with overtones of recognition and emancipation of subjectivities such as those of people with disabilities who live in rural areas such as the municipality of Marinilla

Trayectorias escolares de los estudiantes con discapacidad graduados de la institución educativa San José de Marinilla

El presente texto propone una mirada crítica, política, pedagógica y social de las trayectorias escolares que construyeron las personas con discapacidad de la institución Educativa de San José de Marinilla, que se hayan graduado en el periodo académico comprendido entre los años 2010 - 2017. En la medida que se visualiza una construcción de la forma en que se estructuran las competencias necesarias para el ingreso al mundo laboral y/o académico superior de las personas con discapacidad en este contexto. En esta perspectiva, la identificación de dichas trayectorias permite reconstruir también formas y mecanismos de vinculación de las familias y otras instituciones que se constituyen en la red de apoyo necesaria para garantizar los derechos de las personas con discapacidad en nuestros contextos; en una dialéctica discursiva que posibilita el dialogo entre las pretensiones jurídico/documentales y las expectativas e incluso realidades de vida posterior al ejercicio de la inclusión escolar de esta población. Finalmente se propone también un ejercicio pedagógico de reconocimiento formativo en miras a una relación teórico/prospectiva de la garantía de los derechos de las personas con discapacidad incluso en sus propias construcciones que atañen a posicionar a estas personas en los lugares históricamente determinados para mantener los espacios de invisibilización y utilización amañada en el acto de caridad incluyente, o por el contrario el asomo de unas acciones que posibilitan las expresiones con tintes de reconocimiento y emancipación de subjetividades como la de las personas con discapacidad que habitan en zonas rurales como el municipio de Marinilla.This text proposes a critical, political, pedagogical and social view of the school careers that people with disabilities built at the Educational Institution of San José de Marinilla, who have graduated in the academic period from 2010 to 2017. In the measure that visualizes a construction of the way in which the necessary competences are structured for the entry into the labor and / or higher academic world of people with disabilities in this context. In this perspective, the identification of these trajectories also makes it possible to reconstruct forms and mechanisms for linking families and other institutions that constitute the support network necessary to guarantee the rights of people with disabilities in our contexts; in a discursive dialectic that enables a dialogue between the legal / documentary claims and the expectations and even realities of life after the exercise of school inclusion of this population. Finally, a pedagogical exercise of formative recognition is also proposed with a view to a theoretical / prospective relationship of the guarantee of the rights of people with disabilities, even in their own constructions that concern positioning these people in historically determined places to maintain spaces of invisibility and rigged use in the act of inclusive charity, or on the contrary, the appearance of actions that allow expressions with overtones of recognition and emancipation of subjectivities such as those of people with disabilities who live in rural areas such as the municipality of Marinilla

Effect of RecA inactivation on quinolone susceptibility and the evolution of resistance in clinical isolates of Escherichia coli

This study was presented in part at the Twenty-Ninth European Congress of Clinical Microbiology and Infectious Diseases, Amsterdam, The Netherlands, 2019 (Poster Presentation P1339).[Background] SOS response suppression (by RecA inactivation) has been postulated as a therapeutic strategy for potentiating antimicrobials against Enterobacterales.[Objectives] To evaluate the impact of RecA inactivation on the reversion and evolution of quinolone resistance using a collection of Escherichia coli clinical isolates.[Methods] Twenty-three E. coli clinical isolates, including isolates belonging to the high-risk clone ST131, were included. SOS response was suppressed by recA inactivation. Susceptibility to fluoroquinolones was determined by broth microdilution, growth curves and killing curves. Evolution of quinolone resistance was evaluated by mutant frequency and mutant prevention concentration (MPC).[Results] RecA inactivation resulted in 2–16-fold reductions in fluoroquinolone MICs and modified EUCAST clinical category for several isolates, including ST131 clone isolates. Growth curves and time–kill curves showed a clear disadvantage (up to 10 log10 cfu/mL after 24 h) for survival in strains with an inactivated SOS system. For recA-deficient mutants, MPC values decreased 4–8-fold, with values below the maximum serum concentration of ciprofloxacin. RecA inactivation led to a decrease in mutant frequency (≥103-fold) compared with isolates with unmodified SOS responses at ciprofloxacin concentrations of 4×MIC and 1 mg/L. These effects were also observed in ST131 clone isolates.[Conclusions] While RecA inactivation does not reverse existing resistance, it is a promising strategy for increasing the effectiveness of fluoroquinolones against susceptible clinical isolates, including high-risk clone isolates.This study was funded by the Instituto de Salud Carlos III, Ministerio de Economía y Competitividad—co-financed by European Development Regional Fund ‘A way to achieve Europe’ ERDF, Spanish Network for Research in Infectious Diseases (REIPI RD12/0015 and RD16/0016). Supported by Plan Nacional de I+D+i 2013‐2016 and Instituto de Salud Carlos III, Subdirección General de Redes y Centros de InvestigaciónCooperativa, Ministerio de Economía, Industria y Competitividad, Spanish Network for Research in Infectious Diseases (PI14/00940, PI17/01501, AC16/00072, RD16/0016/0001 and REIPI RD16/0016/0009) ‐ co-financed by European Development Regional Fund ‘A way to achieve Europe’, Operative Programme Intelligent Growth 2014‐2020.Peer reviewe

DNA sequences within glioma-derived extracellular vesicles can cross the intact blood-brain barrier and be detected in peripheral blood of patients

Tumor-cell-secreted extracellular vesicles (EVs) can cross the disrupted bloodbrain barrier (BBB) into the bloodstream. However, in certain gliomas, the BBB remains intact, which might limit EVs release. To evaluate the ability of tumor-derived EVs to cross the BBB, we used an orthotopic xenotransplant mouse model of human glioma-cancer stem cells featuring an intact BBB. We demonstrated that all types of tumor cells-derived EVs−apoptotic bodies, shedding microvesicles and exosomes− cross the intact BBB and can be detected in the peripheral blood, which provides a minimally invasive method for their detection compared to liquid biopsies obtained from cerebrospinal fluid (CSF). Furthermore, these EVs can be readily distinguished from total murine EVs, since they carry human-specific DNA sequences relevant for GBM biology. In a small cohort of glioma patients, we finally demonstrated that peripheral blood EVs cargo can be successfully used to detect the presence of IDH1G395A, an essential biomarker in the current management of human gliomaWe are grateful for the financial support from the ‘Fondo de Investigaciones Sanitarias’ (FIS) (PI10/01069 and PI14/00077) and the ‘Miguel Servet Program’ (CP11/00147) from the ‘Instituto de Salud Carlos III’ (AAS), RTC-2015-3846-1 from Ministerio de Economía y Competitividad and FEDER fund

FLK West (Lower Bed II, Olduvai Gorge, Tanzania): a new early Acheulean site with evidence for human exploitation of fauna

This paper presents a detailed taphonomic study of the faunal assemblage from FLK West (Olduvai Gorge, Tanzania), a site with an Acheulean component that dates to 1.7 Ma. The faunal sample analysed here is distributed in different archaeological levels and is associated with a significant lithic accumulation including several large format tools and handaxes. The fauna indicates the proliferation of open environments similar to those found in other Bed II and late Bed I sites. Evidence of anthropogenic activity (e.g. defleshing activities and marrow consumption) has been identified in the form of cut and percussion marks. A photogrammetric and morphometric analysis suggests that these marks were produced with quartzite flakes and not with handaxes. Evidence of interaction with carnivores was also noted; tooth marks were observed on some bones. Such interaction indicates the existence of competition between humans and carnivores for the same ecological niche, and might lead us to reflect on the survival strategies of Lower Pleistocene hominins

Risk factors for developing ventilator-associated lower respiratory tract infection in patients with severe COVID-19:a multinational, multicentre study, prospective, observational study

Around one-third of patients diagnosed with COVID-19 develop a severe illness that requires admission to the Intensive Care Unit (ICU). In clinical practice, clinicians have learned that patients admitted to the ICU due to severe COVID-19 frequently develop ventilator-associated lower respiratory tract infections (VA-LRTI). This study aims to describe the clinical characteristics, the factors associated with VA-LRTI, and its impact on clinical outcomes in patients with severe COVID-19. This was a multicentre, observational cohort study conducted in ten countries in Latin America and Europe. We included patients with confirmed rtPCR for SARS-CoV-2 requiring ICU admission and endotracheal intubation. Only patients with a microbiological and clinical diagnosis of VA-LRTI were included. Multivariate Logistic regression analyses and Random Forest were conducted to determine the risk factors for VA-LRTI and its clinical impact in patients with severe COVID-19. In our study cohort of 3287 patients, VA-LRTI was diagnosed in 28.8% [948/3287]. The cumulative incidence of ventilator-associated pneumonia (VAP) was 18.6% [610/3287], followed by ventilator-associated tracheobronchitis (VAT) 10.3% [338/3287]. A total of 1252 bacteria species were isolated. The most frequently isolated pathogens were Pseudomonas aeruginosa (21.2% [266/1252]), followed by Klebsiella pneumoniae (19.1% [239/1252]) and Staphylococcus aureus (15.5% [194/1,252]). The factors independently associated with the development of VA-LRTI were prolonged stay under invasive mechanical ventilation, AKI during ICU stay, and the number of comorbidities. Regarding the clinical impact of VA-LRTI, patients with VAP had an increased risk of hospital mortality (OR [95% CI] of 1.81 [1.40-2.34]), while VAT was not associated with increased hospital mortality (OR [95% CI] of 1.34 [0.98-1.83]). VA-LRTI, often with difficult-to-treat bacteria, is frequent in patients admitted to the ICU due to severe COVID-19 and is associated with worse clinical outcomes, including higher mortality. Identifying risk factors for VA-LRTI might allow the early patient diagnosis to improve clinical outcomes. Trial registration: This is a prospective observational study; therefore, no health care interventions were applied to participants, and trial registration is not applicable