Determination of lamotrigine in human plasma by HPLC-PDA. Application to forensic samples.

PURPOSE: Therapeutic drug monitoring of plasma lamotrigine (LTG) has customarily been carried out in order to prevent some its adverse effects. For forensic purposes, determination of LTG in plasma is an useful tool in cases of accidental overdose or suicidal attempts. Currently, there are several analytical methods available including some based on LC tandem mass spectrometry techniques, but simple and accessible LC-UV methods still can be useful for the purpose. Here we report on a new high-performance liquid chromatography method for the determination of lamotrigine in human plasma which has been developed and validated including selectivity, sensitivity, accuracy, precision and recovery studies. METHODS: Lamotrigine and the internal standard chloramphenicol were extracted from plasma using liquid-liquid extraction using small volumes of buffer and ethylacetate. Detection was monitored at 305.7 and 276.0 nm for lamotrigine and chloramphenicol, respectively. RESULTS: The method was linear concentration dependence within the range of 0.1-10 µg/ml, with a mean coefficient of correlation r = 0.993. The limit of detection (LOD) was 0.04 µg/ml and the limit of quantification (LOQ) was 0.1 µg/ml. Intra and interday precision values were lower than 9.0% at all concentrations studied. The intra and interday accuracy values ranged from - 7.6 to 10.1%. Recovery was found to be 98.9% or higher. The method here described was successfully applied to 11 postmortem blood samples received at the Forensic Sciences Institute of Santiago de Compostela (Spain). CONCLUSION: A new HPLC method for the determination of lamotrigine in human plasma was developed and validated. A liquid-liquid extraction using small volumes of buffer and ethylacetate was optimized. The proposed method is suitable for forensic toxicological analysis.

Cultural stress, personal identity development, and mental health among U.S. Hispanic college students.

The present study examines the extent to which culturally stressful experiences may predict impaired well-being, increased internalizing symptoms (depression and anxiety), and increased externalizing problems (social aggression, physical aggression, and rule breaking) among a sample of Hispanic college students in Miami across a 12-day period. The predictive effects of cultural stressors on these outcomes were examined both (a) directly and (b) indirectly through daily fluctuations in students' personal identity synthesis and confusion. Results indicated direct predictive effects of cultural stress on four forms of well-being (self-esteem, life satisfaction, psychological well-being, and eudaimonic well-being), on symptoms of depression and anxiety, and on physical aggression and rule breaking. The predictive effects of cultural stress on all four forms of well-being and on symptoms of depression and anxiety were partially mediated through daily fluctuations (instability) in students' sense of personal identity synthesis. Findings were consistent across genders and between U.S.- and foreign-born students. Results are discussed in terms of implications for intervention and for policy. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Depolarized by the Media? The Role of Heterogeneous and Homogeneous Traditional and Digital Media Diets in Issue Polarization Around COVID-19 in the United States.

Research suggests that a heterogeneous media diet can foster more objective information evaluations, reducing issue polarization as a result. These findings beg the question: Can increased news heterogeneity reduce issue polarization around COVID-19? Using data from a cross-sectional survey in the United States (N = 1,262), this study found that - in line with theoretical expectations - at high levels of homogeneity of traditional and digital news consumption, the difference in support for COVID-19 prevention between Biden and Trump supporters was significantly large. Conversely, this attitude gap narrowed at high news heterogeneity levels. Our results continue to advance research on the role of homogeneous and heterogeneous media diets and biased cognitive processing in issue polarization, a crucial endeavor as polarization poses a challenge to effective public health policy implementation and pandemic management. At the outset, the implications of our findings for pandemic communication (and health communication more generally) are discussed.

Evaluation of an Oral Fluid Collection Device and a Solid-Phase Extraction Method for the Determination of Coca Leaf Alkaloids by Gas Chromatography-Mass Spectrometry.

Some South American countries have ancient traditions that may pose legal problems, such as the consumption of coca leaves, as this can provide positive results for cocaine use after the analysis of biological samples. For this reason, it is necessary to find specific markers that help differentiate legal from illegal consumption, such as tropacocaine, cinnamoylcocaine, and especially hygrine and cuscohygrine. In this work, two techniques for collecting biological samples are compared: the Quantisal® Oral Fluid collection device and passive drooling. Once the samples were collected, they were subjected to solid-phase extraction for subsequent injection into GC-MS. Different validation parameters included in international guides have been studied to evaluate whether the proposed method is valid for the defined purpose, placing special emphasis on the study of the matrix effect and little value on GC-MS analyses. With respect to this parameter, an increase in the signal was found for CUS and t-CIN, but it was not significant for the rest of the substances studied. The recoveries have varied significantly depending on the way of working, being higher when working with standardized areas. After carrying out work with the oral fluid samples collected from laboratory volunteers, the method was applied to two real samples. The results obtained support the need for further research to overcome certain limitations presented by the device.

Measuring Anxiety Among Latino Immigrant Populations: Within-Country and Between-Country Comparisons.

Anxiety is the most prevalent mental health disorder among adults worldwide. Given its increased prevalence among migrants due to their marginalized position in the societies where they reside, psychometric evaluations of anxiety measures such as the Generalized Anxiety Disorder-7 (GAD-7) are needed for use with migrants. The present study is the first attempt to compare the structure of GAD-7 scores for (a) different Latino groups in the same country and (b) the same Latino group in two different countries. Using three samples of Mexican and Venezuelan migrants (total N = 933), we provide reliability and validity evidence of the GAD-7 for use with adult Latino migrants. Utilizing confirmatory factor analysis and item response theory, we demonstrate that the GAD-7 is internally consistent, possesses a strong single-factor structure, and generates scores with equivalent psychometric properties. GAD-7 is appropriate for use with Mexican and Venezuelan migrants across differing gender groups and education levels.

Dark Triad personality traits and realistic and symbolic COVID-19 threat: The role of conspiracy mentality.

The COVID-19 pandemic has profoundly altered global social dynamics through extensive containment measures. Understanding how individuals perceive the virus, distinguishing between realistic and symbolic threats, and considering the influence of personality traits is essential for effective public health messaging and interventions. This study explores the linkage between personality traits and perceived COVID-19 threats, mediated by conspiracy mentality, across diverse international contexts. Online survey data were collected in June 2021 from 13,645 participants across seven European countries, the US, and Colombia. The study explores how individuals with different Dark Triad traits perceive the threat of COVID-19, and whether conspiracy mentality mediates these perceptions. The findings reveal distinct associations. Machiavellianism and narcissism were linked to lower perceived COVID-19 threat, while psychopathy was associated with greater perceived threat. Additionally, individuals with higher conspiracy mentality endorsed greater perceived threat related to COVID-19. This study highlights the influence of Dark Triad personality traits on how individuals perceive the threats posed by COVID-19, with conspiracy mentality mediating this relationship. Understanding these associations provides valuable insights into psychological factors affecting COVID-19 perception, informing future research and public health strategies.

Dry growing seasons predicted Central American migration to the US from 2012 to 2018.

Controlling for factors such as criminal violence and poverty, we tested if drier than usual growing season weather was a predictor of emigration from El Salvador, Guatemala, and Honduras to the US between 2012 and 2018. We focus on growing season weather because agriculture is a primary transmission pathway from the effects of climate change upon migration. We secured the migration apprehensions data for our analysis through a FOIA request to US Customs and Border Protection. Border Patrol intake interviews recorded the original home location of families that arrived at the southern US border. We used this geographic information to measure recent weather patterns and social circumstances in the area that each family departed. We found 70.7% more emigration to the US when local growing seasons in Central America were recently drier than the historical average since 1901.

Vulnerabilidad sociolaboral y riesgo a la salud en mineros de subsistencia en las principales cuencas de Colombia / Combined hydration and effects on the vocal health in speech language pathology students

Objetivos: Evaluar la influencia de las condiciones socio-demográficas y de la existencia de asociaciones entre las condiciones de seguridad laboral y la prevalencia de efectos en la salud. Material y Métodos: Estudio transversal con intensión analítica realizado con fuentes secundarias de variables socio-demográficas, laborales, de condición y efectos sobre la salud asociados a la práctica de la minería aurífera y al uso de mercurio, los registros n=367. La realización de pruebas y estimaciones estadísticas de rigor a un nivel de confianza del 95% (p<0,05). Resultados: Las mujeres en su mayoría, de 45 a 49 años, analfabetos. Los efectos sobre la condición física y la salud asociados a su labor, demuestran la prevalencia de alteraciones como pérdida de: fuerza, visión y cabello. Las regresiones lineales entre las concentraciones orgánicas de Hg (sangre, orina y cabello) y el tiempo de realización de esta labor, apuntan que existen asociaciones proporcionales significativas (p<0,05) Conclusiones: El uso de medidas de seguridad laboral puede incidir significativamente en la reducción de riesgos asociados a la exposición al mercurio, principalmente en segmentos poblacionales con mayor vulnerabilidad. (AU)

Objectives: Develop an assessment of socio-demographic conditions influence as well significant associations among occupational safety conditions and health effects prevalence on gold small-scale miners vulnerability in Colombia. Material and Methods: Cross-sectional study with analytical intent conducted with secondary sources of socio-demographic, labor, condition and health effects variables associated with the practice of gold mining and the use of mercury, records n=367. The performance of tests and statistical estimates of rigor at a confidence level of 95% (p<0.05). Results: Women are mostly illiterate aged 45 to 49. The effects on physical condition and health associated with their work demonstrate the prevalence of alterations such as loss of: strength, vision and hair. The linear regressions between the organic concentrations of Hg (blood, urine and hair) and the time of performance of this work, indicate that there are significant proportional associations (p<0.05). Conclusions: The assessment of occupational safety measures might have a significant impact on potential risks reduction associated with mercury usage and exposure, mainly in population segments with higher vulnerability tendencies. (AU)

Histiocitosis combinada de tipo Langerhans (Histiocitosis de células de Langerhans y enfermedad de Erdheim-Chester) en varón de 64 años con mutaciones en BRAF y NRAS: a propósito de un caso / Combined histiocytosis of the Langerhans group (Langerhans cell histiocytosis and Erdheim-Chester disease) in a 64-year-old man with BRAF and NRAS mutations: a case report

Paciente varón de 64 años con antecedente de enfermedad de Crohn que en el contexto de un episodio de dolor abdominal agudo es ingresado en el hospital, siendo diagnosticado, tras el estudio histológico de una biopsia cutánea y otra pulmonar, de una histiocitosis combinada encuadrada dentro de las histiocitosis del grupo L (Langerhans). En la biopsia cutánea se evidenció proliferación de células histiocitarias con positividad inmunohistoquímica para Langerina, CD1a, S100, resultando el estudio molecular de la misma positivo para la mutación BRAF p.V600E. En la biopsia pulmonar se evidenció una proliferación de células histiocitarias con positividad inmunohistoquímica para CD68 y para S100 y negatividad para Langerina y CD1a, detectándose en la misma mutaciones en NRAS c.38G>A en el exón 2 (p.G13D).(AU)

We present a case of a 64-year-old male with a history of Crohn's disease who presented with an episode of acute abdominal pain. He was being investigated for a dermatological lesion. A skin and lung biopsy both revealed histiocytosis of the “L” (Langerhans) group. The skin biopsy showed a proliferation of histiocytic cells expressing Langerin, CD1a and S100 and the molecular study was positive for the BRAF p.V600E mutation. In the lung biopsy, a proliferation of histiocytic cells was found, which were positive for CD68 and S100 and negative for Langerin and CD1a; mutations in NRAS c.38G>A in exon 2 (p.G13D) were also detected.(AU)

[Combined histiocytosis of the Langerhans group (Langerhans cell histiocytosis and Erdheim-Chester disease) in a 64-year-old man with BRAF and NRAS mutations: a case report]. / Histiocitosis combinada de tipo Langerhans (Histiocitosis de células de Langerhans y enfermedad de Erdheim-Chester) en varón de 64 años con mutaciones en BRAF y NRAS: a propósito de un caso.

We present a case of a 64-year-old male with a history of Crohn's disease who presented with an episode of acute abdominal pain. He was being investigated for a dermatological lesion. A skin and lung biopsy both revealed histiocytosis of the "L" (Langerhans) group. The skin biopsy showed a proliferation of histiocytic cells expressing Langerin, CD1a and S100 and the molecular study was positive for the BRAF p.V600E mutation. In the lung biopsy, a proliferation of histiocytic cells was found, which were positive for CD68 and S100 and negative for Langerin and CD1a; mutations in NRAS c.38G>A in exon 2 (p.G13D) were also detected.

The role of personal identity as a resource for college students during COVID-19.

Objective: We examined the role of personal identity vis-à-vis COVID-related outcomes among college students from seven U.S. campuses during spring/summer 2021. Participants: The present sample consisted of 1,688 students (74.5% female, age range 18-29). The sample was ethnically diverse, and 57.3% were first-generation students. Procedures: Students completed an online survey assessing personal identity synthesis and confusion, COVID-related worries, general internalizing symptoms, positive adaptation, and general well-being. Results: Personal identity synthesis was negatively related to COVID-related worries and general internalizing symptoms, and positively related to positive adaptation, both directly and indirectly through life satisfaction and psychological well-being. Personal identity confusion evidenced an opposing set of direct and indirect associations with outcome variables. Conclusions: Personal identity may potentially be protective against pandemic-related distress among college students, in part through its association with well-being. Reducing identity confusion and promoting identity synthesis are essential among college students during this and future pandemics.

Short telomeres in alveolar type II cells associate with lung fibrosis in post COVID-19 patients with cancer.

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the coronavirus disease 2019 (COVID-19) pandemic. The severity of COVID-19 increases with each decade of life, a phenomenon that suggest that organismal aging contributes to the fatality of the disease. In this regard, we and others have previously shown that COVID-19 severity correlates with shorter telomeres, a molecular determinant of aging, in patient's leukocytes. Lung injury is a predominant feature of acute SARS-CoV-2 infection that can further progress to lung fibrosis in post-COVID-19 patients. Short or dysfunctional telomeres in Alveolar type II (ATII) cells are sufficient to induce pulmonary fibrosis in mouse and humans. Here, we analyze telomere length and the histopathology of lung biopsies from a cohort of alive post-COVID-19 patients and a cohort of age-matched controls with lung cancer. We found loss of ATII cellularity and shorter telomeres in ATII cells concomitant with a marked increase in fibrotic lung parenchyma remodeling in post- COVID-19 patients compared to controls. These findings reveal a link between presence of short telomeres in ATII cells and long-term lung fibrosis sequel in Post-COVID-19 patients.

Intestinal infantile fibrosarcoma with translocation of NTRK. A case report and review of the literature / Fibrosarcoma intestinal infantil con translocación de NTRK y revisión de casos de la literatura

Introduction: Infantile fibrosarcoma is a rare non-rhabdomyosarcomatous soft tissue tumor (0.0005%) of which only 10% occur in the abdomen where they rarely affect the gastrointestinal tract. The median age at diagnosis is 3 months although 40% of them are present at birth. Material and methods: When infantile fibrosarcoma is diagnosed in our center, a clinical–pathological description is made together with a bibliographic review. Results: We present the case of a 6-day-old girl who presented with irritability and rejection of food. She was diagnosed with acute abdomen due to perforation and underwent surgery where a mass on the ascending colon was removed. Histopathology revealed a proliferation of spindle cells consisting of intertwined fascicles, infiltrating the adjacent tissues. Nuclear pleomorphism, few mitoses, foci of necrosis and hemorrhage are seen. Immunohistochemistry showed positivity for Pan-TRK and the NGS panel (Archer DX) demonstrated the TPR::NTRK1 fusion. No case with these characteristics, location or TPR::NTRK1 fusion were found in the literature. Conclusions: Infantile fibrosarcoma is a very infrequent tumor which is exceptionally rare in the intestine. It is important to look for the characteristic genetic rearrangement of these tumors both to confirm the diagnosis and differentiate them from other pediatric spindle cell tumors and determine the correct targeted treatment. Selective TRK inhibitors have shown a 75% response rate in children and adults with tumors that exhibit TRK fusion. It was possible to find fusions with the Archer DX panel that the Oncomine panel did not detect.(AU)

Introducción: El fibrosarcoma infantil es un tumor infrecuente del tejido blando no rabdomiosarcomatoso (0,0005%). Solo el 10% se produce en el abdomen y pocos de ellos afectan al tracto gastrointestinal. La edad media de su diagnóstico es de 3 meses, presentándose el 40% de ellos al nacer. Material y métodos: Con motivo del diagnóstico de un caso de fibrosarcoma infantil en nuestro centro realizamos una descripción clínico-patológica del mismo, y llevamos a cabo una revisión de la literatura al respecto. Resultados: Presentamos el caso de una niña de 6 días de edad, que inició con irritabilidad y rechazo de alimentos, a quien se diagnosticó abdomen agudo debido a perforación. En la intervención quirúrgica se extirpó una masa dependiente en el colon ascendente. El estudio histológico mostró una proliferación de células fusiformes compuesta de fascículos entrelazados, con infiltración en los tejidos adyacentes. Se identificaron pleomorfismo nuclear, pocas mitosis, focos de necrosis y hemorragia. Se obtuvo positividad inmunohistoquímica para Pan-TRK, demostrando el panel de NGS (Archer DX) la fusión TPR::NTRK1. No encontramos en la literatura ningún caso con estas características, localización intestinal y fusión TPR::NTRK1. Conclusiones: El fibrosarcoma infantil es un tumor muy raro, siendo excepcional la localización intestinal. Es importante la búsqueda de la reorganización genética característica de estos tumores, tanto para esclarecer el diagnóstico como para diferenciarlos de otros tumores de células fusiformes de aparición en niños, así como para aportar un tratamiento focalizado. Los inhibidores selectivos de TRK han reflejado una tasa de respuesta del 75% en niños y adultos con tumores que exhiben fusión de TRK. Fue posible encontrar fusiones utilizando el panel Archer DX, no detectadas por el panel Oncomine.(AU)

Tensiones éticas, causas y consecuencias del síndrome de burnout en el personal de salud en tiempos de la Covid-19: una revisión y análisis desde la bioética

esta es una revisión bibliométrica sobre el síndrome de burnout que afectó a profesionales de la salud en tiempos de la Covid-19, los conflictos éticos que lo preceden y suceden, y las estrategias para combatirlo. Metodología/ enfoque: se hizo una revisión bibliométrica en la que se identificaron, de manera sistemática, artículos de revisión, estudios transversales, metaanálisis y estudios cualitativos de todo el mundo. Una vez aplicados los filtros de selección, se analizaron los resultados con el método deliberativo de Diego Gracia. Resultados: se identificaron cuatro subtemas principales, incidencia del burnout durante la pandemia de la Covid-19, estresores éticos que favorecen al síndrome de burnout, consecuencias de este síndrome y estrategias para prevenirlo y combatirlo. Cada subtema se describe desde los ámbitos individuales, institucionales y sociales. Discusión/conclusiones: se argumenta con la teoría de Diego Gracia y se presenta una jerarquización de principios éticos implicados en el burnout, existen factores que favorecen la aparición de esta enfermedad profesional con un profundo calado bioético, en el que subyacen problemas de reconocimiento moral y económico, equidad, seguridad laboral, deber de cuidar, buena práctica médica y el bienestar del paciente, la familia y la sociedad en general. De igual, forma, las consecuencias del síndrome tienen repercusiones en los ámbitos sociales, institucionales e individuales, por lo que las intervenciones para su prevención y atención deben de igual forma tener un enfoque pluralista y diverso desde lo macro, meso y micro. En este sentido, es necesario fortalecer las estrategias de investigación y educación, para comprender, explicar y abordar el fenómeno de una forma integral.

this is a bibliometric review of the burnout syndrome that affected health professionals during Covid-19, the ethical conflicts that precede and follow it, and the strategies to combat it. Methodology/approach: a bibliometric review was carried out in which review articles, cross-sectional studies, meta-analyses, and qualitative studies from all over the world were systematically identified. Once the selection filters were applied, the results were analyzed using Diego Gracia's deliberative method. Results: four main subthemes were identified: incidence of burnout during the Covid-19 pandemic, ethical stressors that favor burnout syndrome, consequences of this syndrome, and strategies to prevent and combat it. Each subtopic is described from the individual, institutional, and societal levels. Discussion/conclusions: it is argued with Diego Gracia's theory, and a hierarchy of ethical principles involved in burnout is presented; some factors favor the appearance of this professional disease with a deep bioethical significance, in which problems of moral and economic recognition, equity, job security, the duty of care, good medical practice and the welfare of the patient, the family and society in general underlie. Similarly, the consequences of the syndrome have repercussions in the social, institutional, and individual spheres, so interventions for its prevention and care must also have a pluralistic and diverse approach from the macro, meso, and micro levels. In this sense, it is necessary to strengthen research and education strategies to understand, explain, and comprehensively address the phenomenon.

esta é uma revisão bibliométrica sobre a síndrome de burnout que afetou profissionais da saúde em tempos da covid-19, os conflitos éticos que a precedem e sucedem, e as estratégias para combatê-la. Metodologia/abordagem: é feita uma revisão bibliométrica na qual foram identificados, de maneira sistemática, artigos de revisão, estudos transversais, metanálise e estudos qualitativos de todo o mundo. Uma vez aplicados os filtros de seleção, foram analisados os resultados com o método deliberativo de Diego Gracia. Resultados: foram identificados quatro subtemas principais: incidência do burnout durante a pandemia da covid-19, estressores éticos que favorecem a síndrome de burnout, consequências dessa síndrome e estratégias para preveni-lo e combatê-lo. Cada subtema é descrito a partir dos âmbitos individuais, institucionais e sociais. Discussão/conclusões: é argumentada com a teoria de Diego Gracia e é apresentada uma hierarquização de princípios éticos implicados no burnout; existem fatores que favorecem o surgimento dessa doença profissional com um profundo silêncio bioético, no qual subjazem problemas de reconhecimento moral e econômico, equidade, segurança profissional, dever de cuidar, boa prática médica e bem-estar do paciente, da família e da sociedade em geral. Além disso, as consequências da síndrome têm repercussões nos âmbitos sociais, institucionais e individuais, razão pela qual as intervenções para sua prevenção e atenção devem de igual forma ter uma abordagem pluralista e diverso a partir do macro, meso e micro. Nesse sentido, é necessário fortalecer as estratégias de pesquisa e educação, para compreender, explicar e abordar o fenômeno de uma forma integral.

Cultural Stress Profiles: Describing Different Typologies of Migration Related and Cultural Stressors among Hispanic or Latino Youth.

Youth of immigrant origin vary across their families' migration history (e.g., country of heritage, reasons for migration, etc.) and in the communities in which they reside. As such, these youth are often faced with different cultural and immigrant stressors. Although prior research documented the detrimental impact of cultural and immigrant stressors, variable-centered approaches fail to account for the fact that these stressors often co-occur. Addressing this gap, the current study identified typologies of cultural stressors in Hispanic/Latino adolescents using latent profile analysis. Cultural stress profiles were derived using socio-political stress, language brokering, in-group identity threats, and within-group discrimination as indicators. The study was conducted in two sites (Los Angeles and Miami; total N = 306) during Spring and Summer 2020. A four-profile solution was identified: Low Cultural Stress (n = 94, 30.7%), Sociopolitical and Language Brokering Stress (n = 147, 48%), Sociopolitical and In-group Identity Threat Stress (n = 48, 15.7%), and Higher Stress (n = 17, 5.6%). Results indicate that profiles with stress were characterized by worse mental health symptoms, reporting higher means of depression, stress, and lower self-esteem, as well as by higher heritage cultural orientation compared to the low stress profile. Interventions designed to mitigate the deleterious effects of cultural stressors would benefit from adopting an individualized, tailored approach that addresses youth's stress profile membership.

Sanitary and environmental conditions related to food poisoning among informal street vendors in downtown Medellín, Colombia, 2016.

Introduction: Although studies with informal workers have been conducted in Latin America and the Caribbean, there is still scarce evidence on the prevalence of food poisoning among workers with subsistence jobs on the streets and sidewalks of cities and on the factors that influence its presentation. Objectives: To determine sociodemographic, labor, sanitary, and environmental conditions that influence the prevalence of food poisoning in informal workers in downtown Medellín, Colombia. Methods: This is a cross-sectional study using a workers' survey as the primary source. A total of 686 workers aged ≥18 years who had been working for ≥ 5 years were surveyed. An assisted survey was initially applied as a pilot test for training purposes and to obtain informed consent. Results: We identified several associations and explanatory factors of food poisoning using chi-square tests and prevalence ratios, with unadjusted and adjusted 95% confidence intervals (95%CI). A higher prevalence of food poisoning (p < 0.05) was observed in workers with lower frequency of waste collection (PR = 2.09; 95%CI = 1.04-4.19), who left cooked food (PR = 6.40; 95%CI = 2.34-17.8), beverages or chopped fruits uncovered at their workplace (PR = 3.92; 95%CI = 1.40-10.48), with inadequate waste management (PR = 4.84; 95%CI = 2.12-11.06), exposure to polluted water (PR = 3.00; 95%CI = 1.20-7.50) and acceptable water supply (PR = 5.40; 95%CI = 1.60-17.8). The factors that explained higher rates of food poisoning were not having a waste collection service (PRadjusted = 5.58; 95%CI = 3.38-13.10), inadequate waste management (PRadjusted = 6.61; 95%CI = 1.25-34.84), and having sanitary services next to worker's stall (PRadjusted = 14.44; 95%CI = 1.26-165.11). Conclusions: The conditions that are associated with and explain the higher prevalence of food poisoning in this working population can be addressed with health promotion and disease prevention interventions.

Introducción: Aunque se han realizado estudios con trabajadores informales en América Latina y el Caribe, aun es escasa la evidencia con respecto a la prevalencia de intoxicaciones alimentarias en trabajadores con empleos de subsistencia en las calles y aceras de las ciudades y a los factores que influyen en su presentación. Objetivos: Determinar las condiciones sociodemográficas, laborales, sanitarias y ambientales que influyen en la prevalencia de intoxicación alimentaria en trabajadores informales del centro de Medellín. Métodos: Estudio transversal con fuente primaria de información en un censo de 686 trabajadores, ≥18 años y con ≥5 años en su oficio. Se aplicó encuesta asistida previa realización de prueba piloto, estandarización de encuestadores y toma de consentimiento. Resultados: Se identificaron asociaciones y factores explicativos de intoxicación alimentaria, con pruebas del chi-cuadrado y razones de prevalencia (RP), con intervalos de confianza del 95% (IC95%) crudos y ajustados. Mayor prevalencia de intoxicación alimentaria (p < 0,05) en trabajadores con menor frecuencia de recolección de residuos (RP = 2,09; IC95% = 1,04-4,19), en quienes dejaban alimentos preparados (RP = 6,40; IC95% = 2,34-17,8), bebidas o fruta picada descubiertos en el puesto de trabajo (RP = 3,92; IC95% = 1,40-10,48), con inadecuado manejo de residuos (RP = 4,84; IC95% = 2,12-11,06), exposición a agua contaminada (RP = 3,00; IC95% = 1,20-7,50) y de aceptable calidad (RP = 5,40; IC95% = 1,60-17,8). Explicaron mayor intoxicación alimentaria no tener servicio de recolección de residuos (RPajustada = 5,58; IC95% = 3,38-13,10), inadecuado manejo de residuos (RPajustada = 6,61; IC95% = 1,25-34,84), y tener servicios sanitarios al lado del puesto de trabajo (RPajustada = 14,44; IC95% = 1,26-165,11). Conclusiones: Las condiciones que se asocian y explican mayor prevalencia de intoxicación alimentaria en esta población trabajadora, pueden ser revertidas con acciones de promoción de la salud y prevención de la enfermedad.

Perceived Negative Political Climate Among Hispanic/Latino Adolescents Before and After the 2020 U.S. Presidential Election: Associations with Internalizing Symptoms and Substance Use.

The political climate often changes following the installment of a new president. This volatility presents opportunities for examining how elections might affect vulnerable subgroups such as Hispanic/Latino (HL) adolescents. The present study explored the perception of negative political climate among HL adolescents before and after the 2020 U.S. presidential election and its association with internalizing symptoms and substance use. We conducted the study in Los Angeles and Miami between 2020-2021, with a sample of 304 HL adolescents (Females = 60.8%), aged 15.3 years on average. Participants completed measures of negative political climate (pre- post-election) and measures of depressive symptoms, anxiety, substance misuse, and substance use intentions after the election. We used paired tests and linear mixed-effects modeling to explore changes in perceived negative climate before and after the election. Structural equation modeling was used to determine predictors of negative political climate and its associations with internalizing symptoms and substance use. Results indicated that following the election negative political climate increased significantly in Miami and among Cuban-origin adolescents but not in Los Angeles or among Mexican-origin adolescents. Pre-election perceived negative political climate was significantly predicted by gender, study site, and mother's nativity. Pre-election negative political climate predicted post-election internalizing symptoms and substance use intentions indirectly through post-election negative political climate. HL youth's perceived political climate is a complex construct that might vary across different sociopolitical contexts and populational sub-groups. Exploring variations in politically-based cultural stressors and their role as mental health and substance use risk factors is crucial to addressing HL disparities. KEY WORDS: Adolescence, Hispanic/Latino, political climate, presidential election, internalizing symptoms, substance use.

Intestinal infantile fibrosarcoma with translocation of NTRK. A case report and review of the literature.

INTRODUCTION: Infantile fibrosarcoma is a rare non-rhabdomyosarcomatous soft tissue tumor (0.0005%) of which only 10% occur in the abdomen where they rarely affect the gastrointestinal tract. The median age at diagnosis is 3 months although 40% of them are present at birth. MATERIAL AND METHODS: When infantile fibrosarcoma is diagnosed in our center, a clinical-pathological description is made together with a bibliographic review. RESULTS: We present the case of a 6-day-old girl who presented with irritability and rejection of food. She was diagnosed with acute abdomen due to perforation and underwent surgery where a mass on the ascending colon was removed. Histopathology revealed a proliferation of spindle cells consisting of intertwined fascicles, infiltrating the adjacent tissues. Nuclear pleomorphism, few mitoses, foci of necrosis and hemorrhage are seen. Immunohistochemistry showed positivity for Pan-TRK and the NGS panel (Archer DX) demonstrated the TPR::NTRK1 fusion. No case with these characteristics, location or TPR::NTRK1 fusion were found in the literature. CONCLUSIONS: Infantile fibrosarcoma is a very infrequent tumor which is exceptionally rare in the intestine. It is important to look for the characteristic genetic rearrangement of these tumors both to confirm the diagnosis and differentiate them from other pediatric spindle cell tumors and determine the correct targeted treatment. Selective TRK inhibitors have shown a 75% response rate in children and adults with tumors that exhibit TRK fusion. It was possible to find fusions with the Archer DX panel that the Oncomine panel did not detect.

Simple Method for the Determination of THC and THC-COOH in Human Postmortem Blood Samples by Gas Chromatography-Mass Spectrometry.

A simple and sensitive analytical method was developed for qualitative and quantitative analysis of Δ9-tetrahydrocannabinol (Δ9-THC) and its metabolite 11-nor-Δ9-tetrahydrocannabinol-carboxylic acid (Δ9-THC-COOH) in human postmortem blood using gas chromatography/mass spectrometry (GC-MS) in selected ion monitoring (SIM) mode. The method involved a liquid-liquid extraction in two steps, one for Δ9-THC and a second one for Δ9-THC-COOH. The first extract was analyzed using Δ9-THC-D3 as internal standard. The second extract was derivatized and analyzed using Δ9-THC-COOH-D3 as internal standard. The method was shown to be very simple, rapid, and sensitive. The method was validated for the two compounds, including linearity (range 0.05-1.5 µg/mL for Δ9-THC and 0.08-1.5 µg/mL for Δ9-THC-COOH), and the main precision parameters. It was linear for both analytes, with quadratic regression of calibration curves always higher than 0.99. The coefficients of variation were less than 15%. Extraction recoveries were superior to 80% for both compounds. The developed method was used to analyze 41 real plasma samples obtained from the Forensic Toxicology Service of the Institute of Forensic Sciences of Santiago de Compostela (Spain) from cases in which the use of cannabis was involved, demonstrating the usefulness of the proposed method.

Three double-dose reinforced hepatitis B revaccination scheme for patients with cirrhosis unresponsive to the standard regimen: an open-label randomised clinical trial.

OBJECTIVE: We aimed to compare the response rates between two different hepatitis B virus vaccination schedules for cirrhotic subjects who were non-responders to the first three 40 µg doses (month 0-1-2), and identify factors associated with the final response. DESIGN: A total of 120 cirrhotic patients (72.5% decompensated) were randomised at a 1:1 ratio to receive a single 40 µg booster vaccination at month 6 (classical arm) versus an additional round of three new 40 µg doses administered at monthly intervals (experimental arm). The main outcome was the rate of postvaccinal anti-hepatitis B surface antibodies levels ≥10 mIU/mL. RESULTS: Efficacy by ITT analysis was higher in the experimental arm (46.7%) than in the classical one (25%); OR 2.63, p=0.013. The experimental arm increased response rates compared with the classical one from 31% to 68% (OR 4.72; p=0.007), from 24.4% to 50% (OR 3.09; p=0.012) and from 24.4% to 53.8% (OR 3.62; p=0.007), in Child A, Model for End-Stage Liver Disease (MELD) <15 and MELD-Na<15 patients, respectively. Patients with more advanced liver disease did not benefit from the reinforced scheme. Both regimens showed similar safety profiles. Multivariable analysis showed that the experimental treatment was independently response associated when adjusted across three logistic regression models indicating equivalent cirrhosis severity. CONCLUSION: For cirrhotic patients, the revaccination of non-responders to the first three dose cycle, with three additional 40 µg doses, achieved significantly better response rates to those obtained with an isolated 40 µg booster dose. TRIAL REGISTRATION NUMBER: NCT01884415.