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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.
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The use of z-drugs has increased worldwide since its introduction. Although the prescribing patterns of hypnotics differ among countries, zolpidem is the most widely used z-drug in the world. Zolpidem may be involved in poisoning and deaths. A simple and fast HPLC-PDA method was developed and validated. Zolpidem and the internal standard chloramphenicol were extracted from plasma using a sonication-assisted dispersive liquid-liquid microextraction procedure. The method was validated including selectivity, linearity, precision, accuracy, and recovery. The calibration range (0.15-0.6 µg/mL) covers therapeutic and toxic levels of zolpidem in plasma. The limit of quantification was set at 0.15 µg/mL. Intra- and interday accuracy and precision values were lower than 15% at the concentration levels studied. Excellent recovery results were obtained for all concentrations. The proposed method was successfully applied to ten real postmortem plasma samples. In our series, multiple substances (alcohol and/or other drugs) were detected in most cases of death involving zolpidem. Our analytical method is suitable for routine toxicological analysis.
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Microextração em Fase Líquida , Zolpidem , Zolpidem/sangue , Humanos , Microextração em Fase Líquida/métodos , Cromatografia Líquida de Alta Pressão/métodos , Sonicação/métodos , Reprodutibilidade dos Testes , Hipnóticos e Sedativos/sangue , Limite de Detecção , Piridinas/sangueRESUMO
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.
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Alcaloides , Coca , Cocaína , Humanos , Coca/química , Cromatografia Gasosa-Espectrometria de Massas , Alcaloides/análise , Folhas de Planta/químicaRESUMO
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.
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COVID-19 , Humanos , Pandemias , Maquiavelismo , Transtorno da Personalidade Antissocial/psicologia , Inquéritos e QuestionáriosRESUMO
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.
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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.
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Doença Hepática Terminal , Hepatite B , Criança , Humanos , Imunização Secundária , Anticorpos Anti-Hepatite B , Índice de Gravidade de Doença , Hepatite B/prevenção & controle , Cirrose Hepática/complicações , Vacinas contra Hepatite BRESUMO
Driving under the influence of alcohol or drugs is a very common behavior in our environment and a serious problem for public health. On the one hand, in 2016, 400,000 people died in the world in traffic accidents in which ethanol was involved. On the other hand, traffic accidents in which the use of drugs of abuse other than ethyl alcohol accounted for more than 160,000 deaths worldwide in 2017. The objective of this work is to carry out a review of the 710 cases of people who died in traffic accidents received at the forensic toxicology service of the Institute of Forensic Sciences of the University of Santiago de Compostela (Galicia-Spain) over a period of 10 years (2009-2019). We performed an observational study of period prevalence, in which the following data were collected: age, sex, year, and analytical results in plasma, in the case of being positive. The data collected was subjected to statistical treatment. Of the 710 cases analyzed, 123 correspond to pedestrians and 587 to occupants of vehicles or motorcycles. A total of 77.6% of the deceased were men. At least one psychotropic substance was found in the blood of almost 40% of the victims. The most frequently found substance was ethyl alcohol, which appeared in 231 cases, more frequently in males. The second place is occupied by benzodiazepines, which appeared in 43 cases, followed by cocaine, which was detected in 25 cases. Polydrug use was found in only 44 cases, with the association of ethanol and cocaine being the most commonly found, followed by that of ethanol and benzodiazepines. Only in 5 of the cases analyzed there were 3 or more substances present. With the data obtained in this study, it is shown that in traffic accidents, the finding of different toxic or medicinal substances is frequent. Ethyl alcohol continues to be very present in road accidents (most detected substance), with the great impact that this implies. Secondly, the presence of benzodiazepines stands out, and cocaine is the third most detected toxic in this study. These results allow to obtain a profile of the substances most frequently involved in traffic accidents. Despite the surveillance, control, and information campaigns that the Spanish Government regularly carries out, the results are far from satisfactory.
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Acidentes de Trânsito , Cocaína , Masculino , Humanos , Feminino , Espanha/epidemiologia , Etanol , Benzodiazepinas , Estudos Observacionais como AssuntoRESUMO
OBJECTIVE: The present study was designed to examine distinct co-occurrence patterns of acculturation and perceived context of reception between weekdays and weekends among Hispanic college students in Miami and their influences on psychosocial maladaptation. METHODS: We conducted a 12-day diary study with a sample of first- and second-generation Hispanic college students in Miami (n = 864). Depressive symptoms and physically aggressive behaviors were assessed on Days 1 and 12, and acculturation components and perceived negative context of reception were measured using single items on Days 2-11. We examined the overlap between weekday and weekend patterns of acculturation and negative context of reception, as well as links of this overlap with depressive symptoms and with physically aggressive behaviors. RESULTS: Overall, six distinct co-occurrence patterns of acculturation and perceived contexts of reception emerged from the analysis. Four of these appeared to represent stable co-occurrence patterns regardless of weekdays and weekends and two indicated changing co-occurrence patterns between weekdays and weekends. Students in patterns of the Moderate Biculturalism-High Negative Context of Reception regardless of weekdays and weekends reported high depressive symptoms and physically aggressive behaviors. Also, for the two changing co-occurrence patterns, students in patterns of the Changes in both Acculturation and Negative Context of Reception between weekdays and weekends reported high scores on both depressive symptoms and physical aggressive behaviors. CONCLUSION: Both stable and changing patterns in acculturation and context of reception co-occurrences between weekdays and weekends predicted psychosocial maladaptation.
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Aculturação , Hispânico ou Latino , Humanos , Hispânico ou Latino/psicologia , EstudantesRESUMO
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.
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Dronabinol , Alucinógenos , Humanos , Cromatografia Gasosa-Espectrometria de Massas/métodos , Alucinógenos/análise , Espectrometria de Massas , Extratos Vegetais , Detecção do Abuso de Substâncias/métodosRESUMO
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.
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Emigrantes e Imigrantes , Transtornos Mentais , Humanos , Adolescente , Estresse Psicológico/psicologia , Idioma , Saúde Mental , Hispânico ou Latino/psicologia , AculturaçãoRESUMO
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.
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We assessed the circulation of severe acute respiratory syndrome coronavirus-2 variants amongst vaccinated military personnel in Bogotá, Colombia to evaluate the mutations of certain variants and their potential for breakthrough infection in vaccinated subjects. We observed that in vaccinated individuals the most frequent infecting lineage was Mu (B.1.621 and B.1.621.1). The above is possibly associated with specific mutations that confer it with vaccine-induced immune escape ability. Our findings highlight the importance of how genomic tracking coupled with epidemiological surveillance can assist in the study of novel emerging variants (e.g., Omicron) and their impact on vaccination efforts worldwide.
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COVID-19 , Vacinas Virais , COVID-19/epidemiologia , COVID-19/prevenção & controle , Colômbia/epidemiologia , Genômica , Humanos , SARS-CoV-2/genéticaRESUMO
The present study was designed to examine the extent to which, in a sample of 873 Hispanic college students, daily levels of, and variability in, well-being would mediate the predictive effects of culturally related stressors (discrimination, negative context of reception, and bicultural stress) on internalizing and externalizing symptoms 11 days later. A 12-day daily diary design was utilized, where reports of cultural stressors were gathered on Day 1, daily well-being reports were gathered on Days 2-11, and outcomes were measured on Day 12 (with controls for Day 1 levels of these same outcomes). Structural equation modeling results indicated that daily means of, and variability in, well-being significantly mediated the predictive effect of Day 1 ethnic/racial discrimination, negative context of reception, and bicultural stress on Day 12 symptoms of anxiety and depression. No effects emerged for externalizing symptoms. When we decomposed the latent well-being variability construct into its component indicators (self-esteem, life satisfaction, psychological well-being/self-acceptance, and eudaimonic well-being), daily variability in life satisfaction and self-acceptance appeared to be primarily responsible for the mediated predictive effects we observed. These results are discussed in terms of implications for further research, for counseling practice, and for the development of more inclusive university practices and policies. (PsycInfo Database Record (c) 2022 APA, all rights reserved).
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Hispânico ou Latino , Racismo , Estresse Psicológico/etnologia , Cultura , Etnicidade , Hispânico ou Latino/psicologia , Humanos , Racismo/psicologia , Autoimagem , Estresse Psicológico/epidemiologia , Estresse Psicológico/etiologia , Estudantes , Adulto JovemRESUMO
BACKGROUND: In recent years, more than 5 million Venezuelans have left their once prosperous country, with several hundred thousand settling in the United States (US). At present, our understanding of the health risk behavior profiles of Venezuelan émigré youth, and their links with cultural stress, remains limited. OBJECTIVES: Drawing from a sample of recently-immigrated Venezuelan youth in the US, we aim to identify subtypes of youth according to their involvement in health risk behaviors (i.e., substance use, sexual risk behavior, violence) and assess the associations between class membership and key constructs related to cultural stress theory (i.e., negative context of reception, family communication/support). METHOD: Latent profile analysis and multinomial regression were performed using data from a community-based convenience sample of 402 recently-arrived Venezuelan immigrant youth (ages 10-17; 56% male). RESULTS: We identified five subtype classes: (1) "Abstainer" (36%), (2) "Alcohol Only" (24%), (3) "Alcohol/Tobacco" (24%), (4) "Aggression" (8%), and (5) "Multidimensional Risk" (8%). Compared to Class #1, youth in Classes #3 and #5 reported significantly higher levels of negative context of reception and lower levels of family functioning while controlling for demographic factors. Youth in Class #5 reported the lowest levels of family economic hardship and the longest duration in the US. CONCLUSION: It is vital that we support both Venezuelan youth who abstain from risk behavior and, at the same time, develop and implement programs that target the needs of those who are at elevated risk for serious consequences related to substance use, sexual risk behavior, and violence.
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Comportamento do Adolescente , Transtornos Relacionados ao Uso de Substâncias , Adolescente , Agressão , Criança , Feminino , Comportamentos Relacionados com a Saúde , Comportamentos de Risco à Saúde , Hispânico ou Latino , Humanos , Masculino , Assunção de Riscos , Comportamento Sexual , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Estados UnidosRESUMO
Crisis migration refers to displacement of large numbers of individuals and families from their home countries due to wars, dictatorial governments, and other critical hazards (e.g., hurricanes). Although crisis migration can adversely influence direct and indirect effects on the mental health of adults and their children collectively as families, there is a deficiency in theory that addresses family level processes in this crisis migration context. We propose the Family Crisis Migration Stress Framework, which consolidates what is known about the multiple factors affecting mental health outcomes of crisis migrants into one cohesive model. In our article, we synthesize relevant theories and models of disaster, migration, and family resilience in order to create a framework in which to organize the complex processes that occur within families as a result of migration and that affect the mental health of children. We include examples from various national settings to illustrate the tenets of our framework. Future policy and intervention for crisis migrant should focus on the family as a unit, instead of parents and children as individual entities.
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Desastres , Resiliência Psicológica , Migrantes , Adulto , Criança , Saúde da Família , Humanos , Saúde MentalRESUMO
BACKGROUND: Leishmaniasis is one of the most important infectious diseases affecting the Colombian National Army due to the high number of reported cases and exposure throughout military operations in endemic areas. The main aim of this study was to estimate the geographical distribution along with the genetic diversity and treatment outcome of Leishmania species in Colombian military personnel. METHODS: Skin lesion samples by smear and aspirate were collected in 136 patients having parasitological cutaneous leishmaniasis (CL) diagnosis. DNA was extracted, the nuclear marker heat shock protein 70 (HSP70) was amplified by PCR and sequenced. Leishmania species were identified by BLASTn. The geo-spatial distribution of the identified parasites was determined according to the possible site of infection. Gene tree was constructed by maximum likelihood (ML), diversity indices (π, h) were estimated and haplotype network was constructed under the Templeton-Crandall-Sing algorithm in order to determine the geographic relationships of the genetic variants of Leishmania species circulating in Colombian military population. RESULTS: The species were identified in 77.94% of the samples, with a predominance of L. braziliensis (65.09%), followed by L. panamensis (31.13%), L. naiffi by the first time reported in Colombia in two patients (1.89%) as well as L. lindenbergi in a single patient (0.945%) with possible infection in the municipality of Miraflores, Guaviare and L. infantum in a single patient (0.945%) notified with CL in the municipality of Tumaco, Nariño. The phylogenetic analysis was consistent according to bootstrap, showing four strongly differentiated clades. CONCLUSIONS: The geo-spatial distribution suggested that L. braziliensis has a greater abundance, while L. panamensis has a greater dispersion. The phylogenetic relationships of Leishmania species in Colombian military personnel was estimated with the confirmation of two new species circulating without prior report in the country and a species with no background for CL in the Colombian army. A substantial genetic diversity of Leishmania braziliensis was defined. This study contributes through the understanding of the molecular epidemiology to the CL transmission in Colombia.
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Antiprotozoários/uso terapêutico , Variação Genética , Leishmania braziliensis/genética , Leishmaniose Cutânea/tratamento farmacológico , Leishmaniose Cutânea/epidemiologia , Antimoniato de Meglumina/uso terapêutico , Militares , Pentamidina/uso terapêutico , Colômbia/epidemiologia , DNA de Protozoário/genética , Proteínas de Choque Térmico HSP70/genética , Haplótipos , Humanos , Leishmaniose Cutânea/parasitologia , Masculino , Filogenia , Reação em Cadeia da Polimerase , Resultado do Tratamento , Adulto JovemRESUMO
BACKGROUND: American tegumentary leishmaniasis (ATL) is a non-lethal parasitic disease that presents with cutaneous (CL) and mucosal (ML) clinical forms. ATL treatment aims at healing the lesions and preventing the development of the late mucosal form. Systemic meglumine antimoniate (MA) therapy with 10-20 mg Sb5+/kg/day is the first choice of treatment. However, alternative therapies using 5 mg Sb5+/kg/day or intralesional (IL) MA are the usual regimens at the National Institute of Infectious Diseases (NIID), Rio de Janeiro, Brazil. OBJECTIVES: To evaluate lethality and the incidence of relapse and development of late ML in CL patients treated at NIID from 2001 until 2013. METHODS: Data were recovered from records of all ATL patients diagnosed during that period. FINDINGS: Out of 777 patients, 753 were treated with MA (96.9%). Of those, 89.1% received alternative therapy of 9.9% IL and 79.2% systemic 5 mg Sb5+/kg/day. Some patients required 1-3 additional courses of treatment, thus making a total of 997 courses; 85.2% of them were subjected to alternative therapies. Lethality was 0.1%, relapse incidence 5.8%, and late ML incidence 0.25%. As a final outcome for the 777 patients, 95.9% were cured, 0.1% died and 4.0% were not able to follow-up. MAIN CONCLUSIONS: Alternative MA schedules resulted in low lethality without increase of relapse or late ML incidence.
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Antiprotozoários/administração & dosagem , Leishmaniose Cutânea/tratamento farmacológico , Meglumina/administração & dosagem , Compostos Organometálicos/administração & dosagem , Adulto , Estudos de Coortes , Feminino , Humanos , Incidência , Injeções Intralesionais , Leishmaniose Cutânea/mortalidade , Masculino , Antimoniato de Meglumina , Pessoa de Meia-Idade , Recidiva , Estudos Retrospectivos , Resultado do TratamentoRESUMO
The organocatalytic enantioselective conjugate addition of secondary ß-ketoamides to α,ß-unsaturated carbonyl compounds is reported. Use of bifunctional Takemoto's thiourea catalyst allows enantiocontrol of the reaction leading either to simple Michael adducts or spirocyclic aminals in up to 99 %â ee. The origin of the enantioselectivity has been rationalised based on combined DFT calculations and kinetic analysis. This study provides a deeper understanding of the reaction mechanism, which involves a predominant role of the secondary amide proton, and clarifies the complex interactions occurring between substrates and the catalyst.
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Amidas/química , Nitrilas/química , Alcenos/química , Catálise , Modelos Moleculares , Análise Espectral , Estereoisomerismo , Tioureia/químicaRESUMO
Internalizing symptoms associated with anxiety and depression have been correlated with harmful alcohol use among Latino/as, but little attention has been paid to assessing the association between perceived discrimination and harmful alcohol use. The present study was designed to investigate the association between perceived discrimination, internalizing symptoms associated with anxiety and depression, and harmful alcohol use among Latino/a immigrants living in the United States (US). Our sample included 426 Latino/a immigrants. Their mean age was 40.05 years (SD = 6.50), 65.50% were women, 80.00% had a partner, 54.20% lived on less than $2,000 a month, and 41.50% reported having attained a college degree. Perceived discrimination was assessed using the Perceived Discrimination Scale, anxious symptoms were assessed using the GAD-7, depressive symptoms were assessed using the CES-D short form, and harmful alcohol use was assessed using AUDIT. We estimated a linear regression model using cross-sectional, self-reported data. The model was statistically significant, R 2 = 0.38, F (8, 425) = 32.09, p < 0.01. Discrimination was significantly associated with AUDIT scores, (ß = 0.21, p < 0.01) after accounting for covariates and for symptoms of anxiety and depression. Our results indicate that experiences of discrimination in the US are associated with increased harmful alcohol use even after controlling for other variables. These findings may be useful in designing coping interventions specifically for Latino/a immigrants to reduce the risk of alcohol use disorder. This study also has political and public health implications for acknowledging the detrimental health consequences of experiencing discrimination, providing support to the position that reducing racism and discrimination represent important public health priorities.
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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).