Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 119
Filtrar
1.
Curr Trop Med Rep ; 11(2): 60-67, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-39006487

RESUMO

Purpose of Review: Despite the availability of effective vaccines against the three primary pathogens (Streptococcus pneumoniae, Haemophilus influenzae type b, and Neisseria meningitidis) that cause bacterial meningitis, this condition remains a significant cause of morbidity, neurologic sequelae, and mortality among children and adults living in low-income and middle-income countries. Recent Findings: Bacterial meningitis represents a significant public health challenge for national and global health systems. Since vaccine-preventable meningitis remains highly prevalent in low-income and middle-income countries, the World Health Organization (WHO) recently developed a global roadmap to defeating meningitis by 2030 and ameliorating its associated neurological sequelae. Summary: There is a need for a global approach to surveillance and prevention of bacterial meningitis. Increasing vaccination coverage with conjugate vaccines against pneumococcus and meningococcus with optimal immunization schedules are high-value healthcare interventions. Additionally, overcoming diagnostic challenges and the early institution of empirical antibiotic therapy and, when feasible, adjunctive steroid therapy constitutes the pillars of reducing the disease burden of bacterial meningitis in resource-limited settings.

2.
Glob Health Epidemiol Genom ; 2024: 9293896, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38410281

RESUMO

Fabry disease (FD) is a multisystem lysosomal storage disorder induced by genetic variants in the alpha-galactosidase A (αGalA) gene. Some FD patients have GLA variants with a reduction in overall αGalA enzymatic activity due to mutated proteins with reduced stability, caused by protein misfolding and premature degradation, but the αGalA catalytic activity remains conserved ("amenable" genetic variants). To correct this misfolding and to prevent premature degradation, migalastat, a small iminosugar molecule was developed. We report the clinical characteristics of FD "amenable" cohort patients from Argentina, prior to starting treatment with migalastat. Seventeen Fabry adult patients were recruited from 13 Argentinian Centers; 8 males (47.1%) and 9 females (52.9%) were included. All genotypes included were missense-type "amenables" mutations. Some classic FD typical early manifestations were more frequent in patients with "classic" versus "late-onset" FD phenotype (pain, p=0.002; cornea verticillata, p=0.019). There was a statistically significant difference in estimated glomerular filtration rate in the "classic" versus "late-onset" phenotype (p=0.026) but no difference between genders (p=0.695). Left ventricular mass was similar between genders (p=0.145) and phenotypes (p=0.303). Cardiovascular risk factors were present among "late-onset" females (obesity 50% and smoke 25%). In patients who started "de novo" migalastat, the main indications were (i) heart disease, (ii) kidney damage, and (iii) pain, while in "switched from prior enzyme replacement therapy" patients, the most frequent indication was "patient decision;" this coincides with publications by other authors.


Assuntos
1-Desoxinojirimicina/análogos & derivados , Doença de Fabry , Adulto , Humanos , Masculino , Feminino , Doença de Fabry/epidemiologia , Doença de Fabry/genética , Doença de Fabry/tratamento farmacológico , 1-Desoxinojirimicina/uso terapêutico , alfa-Galactosidase/genética , alfa-Galactosidase/metabolismo , alfa-Galactosidase/uso terapêutico , Dor/induzido quimicamente , Dor/tratamento farmacológico
3.
Front Genet ; 15: 1327243, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38304339

RESUMO

Background: Cancer genomics, as an interdisciplinary research area within the Global Cancer Research agenda, genomics and precision medicine, its important in research and clinical practice in Latin America. To date, there has been no study investigating evolution of this area in this region. The aim of this study was to evaluate for first time, the historical evolution of cancer genomics research in Latin America. Methods: Bibliometric cross-sectional study of documents on cancer genomics published by Latin American authors until 2023 in Scopus was performed. Statistical and visual analysis was performed with R programming language. Results: A total of 1534 documents were obtained. The first document of cancer genomics research was published in 1997, marking the inception of a 26-year evaluation period that extended until 2023. Among the documents, 74.3% (n = 1140) constituted original articles, followed by 22.7% (n = 349) classified as reviews. International collaboration was observed in 6.5% (n = 100) of the articles. Within the compilation of the ten most prolific authors in this region, 90% of them are from Brazil. This observed pattern extends to affiliations as well, wherein the Universidade de São Paulo emerges as the most active institution (n = 255 documents). This arrangement firmly establishes Brazil's prominence as the preeminent country in the region concerning cancer genomics research, showcasing robust collaboration networks both regionally and intercontinentally. An important transition in the studied hot topics over the last 20 years was identified, from the exploration of the human genome and the characterization of genomic and proteomic cancer profiles (1997-2010) to an in-depth investigation of cancer stem cells and personalized medicine (2011-2023). Among the array of cancer types under study, predominant attention has been directed towards breast, lung, prostate, and leukemia. Conclusion: Over the course of the past 26 years, a favorable and notable evolution has characterized cancer genomics research within Latin America, with Brazil leading the way, which possess a robust network of regional and intercontinental collaboration. Furthermore, the lines of research and hot topics have change in harmony with the region's objectives, strategies, and requisites.

4.
Neotrop Entomol ; 53(1): 18-28, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37752294

RESUMO

The spotted wing drosophila, Drosophila suzukii Matsumura, is native to Southeast Asia and has become a serious pest of soft-skinned fruits worldwide. Several control methods are being tested worldwide as part of an integrated pest management approach. Biological control is a promising alternative tactic that can be used to manage D. suzukii populations, especially in unmanaged areas. This study aimed at exploring the diversity of resident hymenopteran parasitoids of drosophilids in northwestern Patagonia, where D. suzukii is considered an important pest. The survey also aimed to investigate possible associations between parasitoids and D. suzukii in several crops and non-crop fruits, and to determine D. suzukii fruits infestation levels. Fourteen sites with mainly berry crops were sampled biweekly using cider vinegar traps and collecting fresh fruits from a variety of crop and non-crop fruit plants. We identified five species of hymenopteran parasitoids, obtained from the baited traps, that have the potential to associate with D. suzukii: Leptopilina heterotoma Thomson, Ganaspis brasiliensis Ihering, Hexacola hexatoma Hartig (Figitidae), Pachycrepoideus vindemmiae Rondani (Pteromalidae), and Spalangia endius Walker (Spalangiidae). Leptopilina heterotoma is reported for the first time in Argentina. High numbers of D. suzukii adults were recovered from baited traps and field-collected fruits. However, no parasitoid emerged from D. suzukii pupae recovered from fruits, nor were any dead parasitoids recorded inside D. suzukii pupae. Overall infestation levels of D. suzukii on field-collected fruits did not differ significantly between species/varieties. The results are discussed with emphasis on the possible functionality and perspectives of using these species as biological control agents.


Assuntos
Drosophila , Himenópteros , Animais , Produtos Agrícolas , Estações do Ano , Frutas , Controle de Insetos
5.
Sci Rep ; 13(1): 20448, 2023 11 22.
Artigo em Inglês | MEDLINE | ID: mdl-37993633

RESUMO

Sympatric-related species often exhibit resource partitioning. This can occur through different mechanisms, such as behavioral, morphological, and sensory variations, leading to qualitative, temporal, or spatial differences in resource exploitation, such as consuming different types of food. Sensory-based niche partitioning could be the underlying mechanism through which closely related species effectively reduce niche overlap. Here we ask whether variations in sensory responses to carbohydrates could reflect differences in the foraging patterns of two Vespula species present in Patagonia. For this, we established (i) the response thresholds toward carbohydrate solutions of foraging V. germanica and V. vulgaris in the laboratory, (ii) the sugar concentration of foraged carbohydrates in the field, and (iii) possible effects of incoming sugar concentration and performance at individual and colony levels. Results indicate a higher sucrose response threshold in V. germanica than V. vulgaris. Field results indicate that higher carbohydrate concentrations foraged by V. germanica, with 57% of V. germanica foragers returning with concentrations above 50% w/w, while only 23% of V. vulgaris foragers did so. These differences in sucrose sensitivity and foraging patterns positively correlate with colony size, irrespective of the species. Our results suggest that competition could be reduced in these closely related invasive social wasp species through sensory differences in their sugar perception levels, which would lead to them foraging different carbohydrate sources. This study suggests that sensory niche partitioning could promote species coexistence in these social wasps.


Assuntos
Açúcares , Vespas , Animais , Comportamento Alimentar , Espécies Introduzidas , Vespas/fisiologia , Sacarose
6.
Am J Trop Med Hyg ; 109(3): 515-519, 2023 09 06.
Artigo em Inglês | MEDLINE | ID: mdl-37487560

RESUMO

Many people from poverty-stricken countries are migrating across South and Central America to reach the México-United States border, a movement exacerbated by the COVID-19 pandemic. Migrant people who begin their northbound journey in South America must transit across a significant geographic bottleneck, the Darién Gap, a mountainous rainforest region between Colombia and Panama. Most migrant people crossing this region originate from Cuba, Haiti, and Venezuela. Other people reach the shores of South American countries from west and central Africa or central and southeastern Asia and continue to the Darién Gap. Poverty and violence drive families with children to flee their homes and endure incalculable risks in their path. Children traveling with their families or as unaccompanied minors across the Darién Gap are exposed to life-threatening situations and human rights violations, including abuse, exploitation, malnourishment, and limited access to medical care. In addition to experiencing untreated medical illnesses, children experience mental health disorders during migration and after they reach their destination as a result of victimization and adverse traumatic experiences. Therefore, providing migrants, especially children, with rapid medical screenings and mental health support when they arrive at their destination is critical to reduce health inequities. Furthermore, making these interventions available during their transit and ensuring their safety may prevent further human rights abuses in children and families. Latin American governments must address the ongoing humanitarian crisis endured by migrants throughout their migratory path by offering access to essential healthcare services and safeguarding the rights and security of children and vulnerable groups.


Assuntos
COVID-19 , Migrantes , Humanos , Criança , Estados Unidos , Pandemias/prevenção & controle , COVID-19/epidemiologia , América Central , Direitos Humanos
8.
Biomedica ; 43(2): 261-269, 2023 06 30.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-37433172

RESUMO

INTRODUCTION: Massive open online courses provide the opportunity to train health professionals and researchers from Latin America in global health. OBJETIVES: To determine the global offer of massive open online courses in global health and the characteristics of their content. MATERIAL AND METHODS: We examined massive open online course platforms to compile the global health offerings. The search had no time restriction and was last conducted in November, 2021. The search strategy only included the descriptor "global health". We obtained the characteristics of the courses, their content, and the global health domain covered. These data were analyzed using descriptive statistics, reporting absolute and relative frequencies. RESULTS: Our search strategy identified 4,724 massive open online courses. Of these, only 92 were related to global health. Most of these courses (n=44; 47.8%) were offered through Coursera. More than half (n=50; 54.4%) of the MOOCs were conducted by U.S.A. institutions and in English language (n=90; 97.8%). Most courses focused on "globalization of health and healthcare" (n=24; 26.1%), followed by the domains "capacity building" (n=16; 17.4%), "global burden of disease" and "social and environmental determinants of health" (n=15; 16.3%). CONCLUSIONS: We found a high offer of massive open online courses on global health. These courses covered the global health competencies required for health professionals.


Introducción: Los cursos en línea, masivos y abiertos, brindan la oportunidad de formar profesionales e investigadores en Latinoamérica sobre salud global. Objetivos: Determinar la oferta global de los cursos en línea, masivos y abiertos, sobre salud global y conocer las características de su contenido. Materiales y métodos. Se examinaron las plataformas especializadas en cursos en línea, masivos y abiertos, para recopilar aquellos sobre salud global. La búsqueda no tuvo restricción de tiempo y se realizó por última vez en noviembre de 2021. La estrategia de búsqueda solo incluyó el descriptor "global health". Posteriormente, se obtuvieron las características del curso, su contenido y el dominio abordado de salud global. Estos datos fueron analizados descriptivamente, y se reportaron frecuencias absolutas y relativas. Materiales y métodos: Se examinaron las plataformas especializadas en cursos en línea, masivos y abiertos, para recopilar aquellos sobre salud global. La búsqueda no tuvo restricción de tiempo y se realizó por última vez en noviembre de 2021. La estrategia de búsqueda solo incluyó el descriptor "global health". Posteriormente, se obtuvieron las características del curso, su contenido y el dominio abordado de salud global. Estos datos fueron analizados descriptivamente, y se reportaron frecuencias absolutas y relativas. Resultados: La estrategia de búsqueda identificó 4.724 cursos en línea, masivos y abiertos. De ellos, solo 92 estaban relacionados con salud global. La mayoría de estos cursos (n=44; 47,8 %) se ofrecieron mediante la plataforma Coursera. Más de la mitad de los cursos (n=50; 54,4 %) fueron realizados por instituciones de Estados Unidos y en idioma inglés (n=90; 97,8 %). La mayor parte de los cursos se centró en la "globalización de la salud y la asistencia sanitaria" (n=24; 26,1 %), seguido de los dominios "fortalecimiento de capacidades" (n=16; 17,4 %), "carga global de enfermedad" y "determinantes sociales y ambientales de la salud" (n=15; 16,3 %). Conclusiones: Se encontró una importante oferta de cursos en línea, masivos y abiertos, sobre salud global. Estos cursos abordaron las competencias de la salud global que se requieren para los profesionales sanitarios.


Assuntos
Educação a Distância , América Latina
9.
Pest Manag Sci ; 79(10): 3959-3969, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37273195

RESUMO

BACKGROUND: Sirex noctilio is an invasive forest wasp that affects pines and can result in severe economic losses. The use of semiochemicals offers an opportunity to develop sensitive and specific capturing systems to mitigatenegative impacts. Previous research showed that female S. noctilio would use volatiles emitted by its fungal symbiont, Amylostereum areolatum, but little is known about how these modulate behaviour when combined with pine-wood emissions. Our aim was to understand the relevance of fungal volatiles grown on artificial media and wood from two hosts trees, Pinus contorta and Pinus ponderosa, on behavioural and electroantennographic responses of wasp females. Because background odours can modify an insect's response towards resource-indicating semiochemicals, we propose that the behaviour towards the symbiont (resource) will be modulated by host pine emissions (background odours). RESULTS: Olfactometric assays showed that both host species with fungus were attractive when contrasted against air (P. contorta versus Air, χ2 = 12.19, P < 0.001; P. ponderosa versus Air, χ2 = 20.60, P < 0.001) and suggest a clear hierarchy in terms of female preferences towards the tested stimuli, with response highest towards the fungus grown on P. contorta (olfactory preference index: 5.5). Electrophysiological analyses indicate that females detect 62 volatile compounds from the tested sources. CONCLUSION: Results indicate a strong synergy between symbiont and host semiochemicals, suggesting that the pine species could play a fundamental role in the interaction. Further understanding of the chemical basis of this, could guide the development of specific and attractive lures, in order to maximize attraction of wasps in surveillance programmes. © 2023 Society of Chemical Industry.


Assuntos
Pinus , Vespas , Animais , Feminino , Árvores , Oviposição , Sinais (Psicologia) , Simbiose , Vespas/fisiologia
10.
Rev. argent. salud publica ; 15: 90-90, jun. 2023. graf
Artigo em Espanhol | LILACS-Express | LILACS | ID: biblio-1449447

RESUMO

RESUMEN INTRODUCCIÓN En Argentina, la obesidad en adultos es una problemática con una prevalencia media de 25,4%. En la relación entre COVID-19 y obesidad, se observa mayor prevalencia de sobrepeso/obesidad y enfermedad severa entre los pacientes con COVID-19. Por ello, el objetivo del estudio fue conocer las características clínicas y epidemiológicas en pacientes con diagnóstico de obesidad sobrevivientes a la infección por SARS-CoV-2. MÉTODOS Se realizó un estudio observacional descriptivo y analítico de corte transversal. Se aplicó una encuesta autoadministrada. RESULTADOS La mediana de edad fue 41 años, y hubo un 69,9% de mujeres. Los síntomas de presentación más prevalentes fueron astenia (86,7%), anosmia (64,5%) y tos (64%). Con respecto a los síntomas persistentes luego de las 12 semanas del diagnóstico, los más prevalentes fueron astenia (52,9%), trastornos de sueño (32,4%) y falta de concentración/memoria (31,7%). Hubo mayor riesgo en mujeres (OR: 2,86; IC95%: 2,23-3,67) con obesidad (OR: 1,58; IC95%: 1,16-2,16). La enfermedad grave en obesos fue casi el triple comparado con no obesos (15,7% vs. 5,4%; p<0,001). DISCUSIÓN Los pacientes obesos mostraron síntomas de presentación que orientan a un estado inflamatorio sistémico, con disnea y tos más frecuentes, y tienen mayor prevalencia de enfermedad grave y neumonía, así como mayor riesgo de desarrollar síntomas persistentes, sobre todo si las personas son mujeres y sedentarias.


ABSTRACT INTRODUCTION In Argentina, obesity in adults is a problem with an average prevalence of 25.4%. The relationship between COVID-19 and obesity shows a higher prevalence of overweight/obesity and severe disease among patients with COVID-19. Therefore, the objective of the study was to know the clinical and epidemiological characteristics of patients diagnosed with obesity who survived SARSCoV- 2 infection. METHODS A descriptive and analytical cross-sectional observational study was carried out. A self-administered survey was applied. RESULTS The median age was 41 years and 69.9% were women. The most prevalent presenting symptoms were asthenia (86.7%), anosmia (64.5%) and cough (64%). Regarding persistent symptoms 12 weeks after diagnosis, the most prevalent ones were asthenia (52.9%), sleep disorders (32.4%) and lack of concentration/memory (31.7%). The risk was higher for women (OR: 2.865; CI95%: 2.23-3.67) with obesity (OR: 1.58; CI95%: 1.16-2.16). Severe disease in obese was almost threefold that in non-obese patients (15.7% vs. 5.4%; p<0.001). DISCUSSION Obese patients showed presenting symptoms that point to a systemic inflammatory state, with dyspnea and cough being more common, and have a higher prevalence of severe disease and pneumonia, as well as a higher risk of developing persistent symptoms, especially if they are women and sedentary.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA