Advancements in dementia research, diagnostics, and care in Latin America: Highlights from the 2023 Alzheimer's Association International conference satellite symposium in Mexico City.

INTRODUCTION: While Latin America (LatAm) is facing an increasing burden of dementia due to the rapid aging of the population, it remains underrepresented in dementia research, diagnostics, and care. METHODS: In 2023, the Alzheimer's Association hosted its eighth satellite symposium in Mexico, highlighting emerging dementia research, priorities, and challenges within LatAm. RESULTS: Significant initiatives in the region, including intracountry support, showcased their efforts in fostering national and international collaborations; genetic studies unveiled the unique genetic admixture in LatAm; researchers conducting emerging clinical trials discussed ongoing culturally specific interventions; and the urgent need to harmonize practices and studies, improve diagnosis and care, and use affordable biomarkers in the region was highlighted. DISCUSSION: The myriad of topics discussed at the 2023 AAIC satellite symposium highlighted the growing research efforts in LatAm, providing valuable insights into dementia biology, genetics, epidemiology, treatment, and care.

Influence of dengue virus serotypes on the abundance of Aedes aegypti insect-specific viruses (ISVs).

A comprehensive understanding of the virome in mosquito vectors is crucial for assessing the potential transmission of viral agents, designing effective vector control strategies, and advancing our knowledge of insect-specific viruses (ISVs). In this study, we utilized Oxford Nanopore Technologies metagenomics to characterize the virome of Aedes aegypti mosquitoes collected in various regions of Colombia, a country hyperendemic for dengue virus (DENV). Analyses were conducted on groups of insects with previous natural DENV infection (DENV-1 and DENV-2 serotypes), as well as mosquito samples that tested negative for virus infection (DENV-negative). Our findings indicate that the Ae. aegypti virome exhibits a similar viral composition at the ISV family and species levels in both DENV-positive and DENV-negative samples across all study sites. However, differences were observed in the relative abundance of viral families such as Phenuiviridae, Partitiviridae, Flaviviridae, Rhabdoviridae, Picornaviridae, Bromoviridae, and Virgaviridae, depending on the serotype of DENV-1 and DENV-2. In addition, ISVs are frequently found in the core virome of Ae. aegypti, such as Phasi Charoen-like phasivirus (PCLV), which was the most prevalent and showed variable abundance in relation to the presence of specific DENV serotypes. Phylogenetic analyses of the L, M, and S segments of the PCLV genome are associated with sequences from different regions of the world but show close clustering with sequences from Brazil and Guadeloupe, indicating a shared evolutionary relationship. The profiling of the Ae. aegypti virome in Colombia presented here improves our understanding of viral diversity within mosquito vectors and provides information that opens the way to possible connections between ISVs and arboviruses. Future studies aimed at deepening our understanding of the mechanisms underlying the interactions between ISVs and DENV serotypes in Ae. aegypti could provide valuable information for the design of effective vector-borne viral disease control and prevention strategies.IMPORTANCEIn this study, we employed a metagenomic approach to characterize the virome of Aedes aegypti mosquitoes, with and without natural DENV infection, in several regions of Colombia. Our findings indicate that the mosquito virome is predominantly composed of insect-specific viruses (ISVs) and that infection with different DENV serotypes (DENV-1 and DENV-2) could lead to alterations in the relative abundance of viral families and species constituting the core virome in Aedes spp. The study also sheds light on the identification of the genome and evolutionary relationships of the Phasi Charoen-like phasivirus in Ae. aegypti in Colombia, a widespread ISV in areas with high DENV incidence.

Characterizing viral species in mosquitoes (Culicidae) in the Colombian Orinoco: insights from a preliminary metagenomic study.

Mosquitoes (Diptera: Culicidae) are primary vectors of arthropod-borne viruses (arboviruses) that pose significant public health threats. Recent advances in sequencing technology emphasize the importance of understanding the arboviruses and insect-specific viruses (ISVs) hosted by mosquitoes, collectively called the "virome". Colombia, a tropical country with favorable conditions for the development and adaptation of multiple species of Culicidae, offers a favorable scenario for the transmission of epidemiologically important arboviruses. However, entomovirological surveillance studies are scarce in rural areas of the country, where humans, mosquitoes, and animals (both domestic and wild) coexist, leading to a higher risk of transmission of zoonotic diseases to humans. Thus, our study aimed to perform a preliminary metagenomic analysis of the mosquitoes of special relevance to public health belonging to the genera Ochlerotatus, Culex, Limatus, Mansonia, Psorophora, and Sabethes, within a rural savanna ecosystem in the Colombian Orinoco. We employed third-generation sequencing technology (Oxford Nanopore Technologies; ONT) to describe the virome of mosquitoes samples. Our results revealed that the virome was primarily shaped by insect-specific viruses (ISVs), with the Iflaviridae family being the most prevalent across all mosquito samples. Furthermore, we identified a group of ISVs that were common in all mosquito species tested, displaying the highest relative abundance concerning other groups of viruses. Notably, Hanko iflavirus-1 was especially prevalent in Culex eknomios (88.4%) and Ochlerotatus serratus (88.0%). Additionally, other ISVs, such as Guadalupe mosquito virus (GMV), Hubei mosquito virus1 (HMV1), Uxmal virus, Tanay virus, Cordoba virus, and Castlerea virus (all belonging to the Negevirus genus), were found as common viral species among the mosquitoes, although in lower proportions. These initial findings contribute to our understanding of ISVs within mosquito vectors of the Culicidae family in the Eastern Plains of Colombia. We recommend that future research explore deeper into ISV species shared among diverse vector species, and their potential interactions with arboviruses. In addition, we also showed the need for a thorough exploration of the influence of local rural habitat conditions on the shape of the virome in mosquito vectors.

Employing oxford nanopore technologies (ONT) for understanding the ecology and transmission dynamics of flaviviruses in mosquitoes (Diptera: Culicidae) from Eastern Colombia.

Studies focused on identifying the viral species of Flavivirus in vectors are scarce in Latin America and particularly in Colombia. Therefore, the frequency of infection of the Flavivirus genus and its feeding preferences were identified in the mosquito species circulating in the municipality of Puerto Carreño-Vichada, located in the Eastern Plains of Colombia. This was done by sequencing the viral NS5 and vertebrate 12S rRNA genes, respectively, using Oxford Nanopore Technologies (ONT). A total of 1,159 mosquitoes were captured, with the most abundant species being Aedes serratus at 73.6% (n = 853). All the mosquitoes were processed in 230 pools (2-6 individuals) and 51 individuals, where 37.01% (n = 104) were found to be infected with Flavivirus. In these samples, infection by arboviruses of epidemiological importance, such as dengue virus (DENV), Zika virus (ZIKV), and chikungunya virus (CHIKV), was ruled out by PCR. However, through sequencing, infection by different insect-specific viruses (ISFVs) and a medically important virus, West Nile virus (WNV), were identified in a mosquito of the Culex browni species. Additionally, the feeding patterns showed that most species present a generalist behavior. Given the above, conducting entomovirological surveillance studies is crucial, especially in areas of low anthropogenic intervention, due to the high probability that potentially pathogenic viruses could generate spillover events under deforestation scenarios.

Latin American Initiative for Lifestyle Intervention to Prevent Cognitive Decline (LatAm-FINGERS): Study design and harmonization.

INTRODUCTION: Latin American Initiative for Lifestyle Intervention to Prevent Cognitive Decline (LatAm-FINGERS) is the first non-pharmacological multicenter randomized clinical trial (RCT) to prevent cognitive impairment in Latin America (LA). Our aim is to present the study design and discuss the strategies used for multicultural harmonization. METHODS: This 1-year RCT (working on a 1-year extension) investigates the feasibility of a multi-domain lifestyle intervention in LA and the efficacy of the intervention, primarily on cognitive function. An external harmonization process was carried out to follow the FINGER model, and an internal harmonization was performed to ensure this study was feasible and comparable across the 12 participating LA countries. RESULTS: Currently, 1549 participants have been screened, and 815 randomized. Participants are ethnically diverse (56% are Nestizo) and have high cardiovascular risk (39% have metabolic syndrome). DISCUSSION: LatAm-FINGERS overcame a significant challenge to combine the region's diversity into a multi-domain risk reduction intervention feasible across LA while preserving the original FINGER design.

Long-term functional ability trajectories and mental health among older people before and after the COVID-19 pandemic onset in Chile.

OBJECTIVES: Despite the advances in understanding the complex association between functional abilities and mental health in old age, studies have overlooked two important aspects. First, traditionally, research has employed cross-sectional designs, measuring limitations at a single time point. Second, most gerontological studies on this field have been conducted before the COVID-19 pandemic onset. This study aims to explore the association between diverse long-term functional ability trajectories across late adulthood and old age, and older people's mental health in Chile, before and after the COVID-19 pandemic onset. METHODS: We use data from the population-representative and longitudinal 'Chilean Social Protection Survey', sequence analysis to reconstruct functional ability trajectory types from 2004 to 2018, and bivariate and multivariate analyses to measure their association with depressive symptoms in early 2020 (N = 891) and late 2020 (N = 672). We analyzed four age groups defined by their age at baseline (2004): people aged 46-50, 51-55, 56-60, and 61-65. RESULTS: Our findings indicate that erratic or equivocal patterns of functional limitations across time (with people transiting back and forth between low and high levels of limitations) show the worst mental health outcomes, both before and after the pandemic onset. Prevalence of people with depression increased after the COVID-19 onset in most groups, being particularly high among those with previous equivocal functional ability trajectories. CONCLUSIONS: The relationship between functional ability trajectories and mental health calls for a new paradigm, moving away from age as the main policy guide, and highlighting the need to adopt strategies to improve population-level functional status as an efficient policy to address the challenges of population aging.

Extending the Analysis of Functional Ability Trajectories to Unexplored National Contexts: The Case of Chile.

OBJECTIVES: Despite the enormous advances in the field, most evidence about functional ability trajectories in old age comes from studies conducted in developed and high-income countries. This research aims to build on these previous advances to examine functional ability trajectories in Chile. METHOD: Drawing on a robust, publicly available 15-year panel data set (2004-2018), and using sequence analysis, we examine functional ability trajectories types among 4 age groups (people aged 46-50, 51-55, 56-60, and 61-64 at baseline). Then, we analyze trajectories' dynamics looking at intraindividual health-declining and health-recovery transitions between functional ability statuses, within each trajectory type. Finally, we assess how multiple baseline individual characteristics predict the likelihood of following a functional ability trajectory type, using multinomial regression models. RESULTS: Across all age groups, an important fraction (between 26% and 50%) reports stable healthy trajectories, and between 10% and 20% follow equivocal-declining trajectories (i.e., exhibiting both health-declining and health-recovery intraindividual transitions), suggesting that age might not be the main source of heterogeneity in functional ability trajectories. Overall, women, lower educated people, nonworking individuals, and people with a higher burden of chronic conditions at baseline are more prevalent among health-declining trajectory types; however, these results are not constant across the age groups analyzed. DISCUSSION: This nationally focused study reinforces the feasibility and usefulness of an in-depth analysis of functional ability trajectories in old age. The study findings can be crucial to define different prevention strategies according to the functional ability path that an individual might follow, especially in countries like Chile that currently navigate the challenges of population aging.

Feasibility of selective anthelmintic therapy to horses in tropical conditions: the Cuban scenario.

For the past several decades, selective anthelmintic therapy (SAT) has been recommended in temperate climate countries for controlling gastrointestinal parasites in horses. However, the feasibility of this approach in tropical climates remains unknown, given the very different parasite transmission patterns and a larger representation of working equids. The aim of this study was to evaluate the bio-economic feasibility of SAT in horses kept under tropical conditions of Camagüey, Cuba. Fecal egg counts were determined from 794 adult horses and used for evaluating three different putative treatment thresholds; > 500 strongylid eggs per gram of feces (EPG); > 1000 EPG; and treatments yielding > 80% of the total herd egg output. These scenarios were evaluated under three treatment frequencies (every 2, 6, and 12 months). The bio-economic feasibility of these nine possible selective anthelmintic therapy scenarios was evaluated taking into account the cost of parasitological tests, and the mean cost of anthelmintic treatment in Camagüey. The majority (96.7%) of the samples tested were positive for strongyle eggs, with a mean of 1549 EPG. The percentage of horses exceeding the cut-off points at the nine scenarios varied between 40.1 and 93.8%. All owners surveyed used extra-label anthelmintic product in their horses on a routine basis. The economic analysis demonstrated that selective therapy generally was much more costly than deworming the entire herd without determining egg counts. However, we consider that the deworming every 6 months of the horses that expel 80% of the eggs in the herd allows a reduction of the treatment intensity without increasing costs, and it can be considered as a viable selective deworming scheme under similar conditions.

Protocolo de Teleodontología para Asistencia al Paciente en el Manejo de Urgencia Dental. Cuarentena COVID-19 (SARS-CoV-2). Categorización Remota de Urgencia Dental y Asistencia (C.R.U.D.A.) / Teledentistry Protocol for Patient Assistance in Emergency Dental Management. Quarantine COVID-19 (SARS-CoV-2). Remote Categorization of Dental Emergency and Assistance (C.R.U.D.A. for its Spanish Acronym)

RESUMEN: En el contexto de cuarentena debido a la pandemia SARS-CoV-2, la odontología ha migrado a mecanismos remotos de atención para categorizar emergencias y urgencias. Sin embargo, no hay evidencia de protocolos validados de teleodontología aplicado al triaje remoto de urgencia en la literatura. Por ello, proponemos el instrumento denominado "Categorización Remota de Urgencia Dental y Asistencia" (C.R.U.D.A), aplicado a un protocolo de teleodontología. Para la construcción del protocolo, usamos la metodología de investigación-acción, un ciclo de autoreflexión frente al problema existente que buscamos solucionar, un espiral repetitivo de ciclos de planeamiento, acción, observación sistemática y reflexión, con el que fuimos perfeccionando el instrumento de forma colaborativa y rigurosa. Los objetivos del protocolo son estandarizar, optimizar y automatizar el proceso de categorización de urgencia dental gracias a su especificidad, disminuyendo el tiempo y complejidad de su aplicación a gran escala, permitiendo descongestionar el sistema de salud, y disminuir el riesgo de exposiciones innecesarias, protegiendo de esta forma al personal clínico y pacientes. Al mismo tiempo, su nivel de legibilidad permitiríamejorar la comunicación y orientación al paciente. En definitiva, el protocolo propuesto es viable y cumple con las características para optimizar el proceso de teletriaje actual, potenciando la atención personalizada entre odontólogos y pacientes. Sin embargo, es necesario realizar estudios de aplicabilidad y validez, además de incorporar las mejoras correspondientes según los errores o defectos detectados por pacientes y cirujano dentistas.

ABSTRACT: In the context of quarantine due to the SARS-CoV-2 pandemic, dentistry has migrated to remote care mechanisms to categorize emergencies and casualties.However, there is no evidence of validated teledentistry protocols applied to remote emergency triage in the literature. Therefore, we propose an instrument called "Remote Categorization of Dental Emergency and Assistance" (C.R.U.D.A., for its Spanish acronym), applied to a teledentistry protocol. For the construction of the protocol, we used the action-research methodology, a self-reflection cycle to solve an existing problem, a constant repetition of planning, action, systematic observation, and reflection, with which we perfected the instrument in a collaborative and rigorous way. The objectives of the protocol are to standardize, optimize and automate the process of categorization of dental emergencies thanks to its specificity, decreasing the time and complexity of its application on a large scale, allowing to decongest the health system and to diminish the risk of unnecessary exposures, thus protecting clinical staff and patients. At the same time, its level of readability would allow for improved communication and patient orientation. In short, the proposed protocol is viable and meets the characteristics to optimize the current teletriage process, enhancing personalized attention between dentists and patients. However, it is necessary to carry out applicability and validity studies, in addition to incorporating the corresponding improvements according to the errors or defects detected by patients and dental surgeons.

Full genome sequence of the first SARS-CoV-2 detected in Mexico.

SARS-CoV-2 was first detected in the city of Wuhan, Hubei Province, China. In this report, we describe the complete genome sequence of the first imported SARS-CoV-2, detected in a Mexican patient who had traveled to Bergamo, Italy. Phylogenetic analysis showed that this isolate belongs to subclade A2a (lineage G) and is closely related to isolates from Finland, Germany and Brazil, all of which were from patients with a history of travel to Italy. This is the first report of the complete genome sequence of this virus in Mexico.

Nutritional Education and Promotion of Healthy Eating Behaviors Among Mexican Children Through Video Games: Design and Pilot Test of FoodRateMaster.

BACKGROUND: Childhood obesity has risen dramatically in recent decades, reaching epidemic levels. Children need guidance on and support for maintaining a healthy diet and physical activity to ensure that they grow appropriately and develop healthy eating habits. Serious video games have shown positive effects on promoting the nutritional knowledge, and eating attitudes and behaviors of children; however, research about the usefulness of such games with younger children (8-10 years old) is sparse. OBJECTIVE: The objective of this study was to design and test the serious video game FoodRateMaster targeting children between 8 and 10 years old. The game includes nutritional information and behavior change techniques to help children improve their knowledge of healthy and unhealthy foods, increase their intake of healthy food, and reduce their intake of ultraprocessed food. In addition, FoodRateMaster was designed as an active game to promote physical activity. METHODS: An interdisciplinary team developed FoodRateMaster following an iterative methodology based on a user-centered design. A total of 60 participants (mean age 9 years, SD 0.8; 53% male) completed 12 individual gaming sessions in 6 weeks. A food knowledge questionnaire and a food frequency questionnaire were completed before and after game play. In addition, 39 of the participants' parents answered a parent perception questionnaire after the game play. RESULTS: Participants showed increased food knowledge from pregame (mean 56.9, SD 10.7) to postgame play (mean 67.8, SD 10.7; P<.001). In addition, there was a greater self-reported frequency in the consumption of cauliflower and broccoli (P<.001) and corn quesadillas (P<.001). They also indicated a lower self-reported intake of 10 unhealthy foods, including french fries (P=.003), candy and chocolate (P<.001), sweet soft cakes (P=.009), and soft drinks (P=.03). Moreover, most of the parents who answered the parent perception questionnaire agreed that their children showed greater interest in explaining why they should avoid some unhealthy foods (67%, 26/39), in distinguishing between healthy and unhealthy foods (64%, 25/39), and in the intake of fruits (64%, 25/39) and vegetables (59%, 23/39). Finally, 14 parents stated that they introduced some changes in their children's diet based on the comments and suggestions they received from their children. CONCLUSIONS: In an initial evaluation, children between 8 and 10 years old indicated an increased level in nutritional knowledge and their self-reported frequency intake of two healthy foods, and a decreased level in their self-reported intake of 10 unhealthy foods after playing FoodRateMaster. Moreover, the participants' parents agreed that FoodRateMaster positively influenced their children's attitudes toward several healthy eating behaviors. These results support that health games such as FoodRateMaster are viable tools to help young children increase their food knowledge and improve dietary behaviors. A follow-up randomized controlled trial will be conducted to assess the medium- and long-term effects of FoodRateMaster.

Adsorption Behavior of Pb(II), Cd(II), and Zn(II) onto Agave Bagasse, Characterization, and Mechanism.

Biosorption is an alternative procedure to remove metal ions from aqueous media using agricultural waste. In this work, the adsorption capacity and removal efficiency of agave bagasse (AB) toward Pb(II), Cd(II), and Zn(II) were analyzed. Parameters such as equilibrium pH, particle size, AB dosage, time, and initial metal ion concentration were discussed. The results showed that pH 5.5, 0.4 g (<250 µm), and only 15 min of contact assured conditions for maximum adsorption capacity. The kinetic studies were fitted to the pseudo-second-order model, whereas the isotherms showed good agreement with the Langmuir model. AB has a higher affinity for Pb(II) over Cd(II) and Zn(II), and the maximum adsorption capacities were 93.14, 28.50, and 24.66 mg g-1, respectively. The results of the characterization evidenced two adsorption mechanisms. Scanning electron microscopy and X-ray diffraction displayed adsorption via the ion exchange mechanism by releasing Ca(II). The 13C cross-polarization mode with magic-angle spinning nuclear magnetic resonance analysis demonstrated a complexation mechanism by cellulose, hemicellulose, and lignin groups with Pb(II) and Cd(II), whereas the complexation is mainly observed by cellulose groups for Zn(II). AB is a good alternative for the removal of metals without prior thermal or chemical treatment, with rapid kinetics, suitable adsorption capacity, and high removal efficiency contributing to waste management.

[Needs in coverage and care for lung cancer in Mexico]. / Necesidades de cobertura y atención del cáncer pulmonar en México.

OBJECTIVE: To analyze the coverage of lung cancer in Mexico and offer recommendations in this regard. MATERIALS AND METHODS: By means of the conformation of a multidisciplinary group, we analyze the burden of the disease relative to the lung cancer and the access to the medical treatment offered by the different public health subsystems in Mexico. RESULTS: Important inequalities in lung cancer care are documented among the different public health subsystems. Our data suggest differential access and coverage to both traditional treatments and existing therapeutic innovations and differences in the capacity of health service providers to guarantee the right to health protection without distinction. CONCLUSIONS: Recommendations are made on the need to improve actions for tobacco control, early diagnosis for lung cancer and inclusion of innovative therapies and homologation among different public health service providers through financing via tobacco taxes.

OBJETIVO: Analizar la cobertura en salud de cáncer pulmonar en México y ofrecer recomendaciones al respecto. MATERIAL Y MÉTODOS: Mediante la conformación de un grupo multidisciplinario se analizó la carga de la enfermedad relativa al cáncer de pulmón y el acceso al tratamiento médico que ofrecen los diferentes subsistemas de salud en México. RESULTADOS: Se documentan desigualdades importantes en la atención del cáncer de pulmón entre los distintos subsistemas de salud que sugieren acceso y cobertura en salud variable, tanto a los tratamientos tradicionales como a las innovaciones terapéuticas existentes, y diferencias en la capacidad de los prestadores de servicios de salud para garantizar el derecho a la protección de la salud sin distinciones. CONCLUSIONES: Se hacen recomendaciones sobre la necesidad de mejorar las acciones para el control del tabaco, el diagnóstico temprano y la inclusión de terapias innovadoras y la homologación entre los diferentes prestadores públicos de servicios de salud a través del financiamiento con la recaudación de impuestos al tabaco.

Necesidades de cobertura y atención del cáncer pulmonar en México / Needs in coverage and care for lung cancer in Mexico

Resumen: Objetivo: Analizar la cobertura en salud de cáncer pulmonar en México y ofrecer recomendaciones al respecto. Material y métodos: Mediante la conformación de un grupo multidisciplinario se analizó la carga de la enfermedad relativa al cáncer de pulmón y el acceso al tratamiento médico que ofrecen los diferentes subsistemas de salud en México. Resultados: Se documentan desigualdades importantes en la atención del cáncer de pulmón entre los distintos subsistemas de salud que sugieren acceso y cobertura en salud variable, tanto a los tratamientos tradicionales como a las innovaciones terapéuticas existentes, y diferencias en la capacidad de los prestadores de servicios de salud para garantizar el derecho a la protección de la salud sin distinciones. Conclusión: Se hacen recomendaciones sobre la necesidad de mejorar las acciones para el control del tabaco, el diagnóstico temprano y la inclusión de terapias innovadoras y la homologación entre los diferentes prestadores públicos de servicios de salud a través del financiamiento con la recaudación de impuestos al tabaco.

Abstract: Objective: To analyze the coverage of lung cancer in Mexico and offer recommendations in this regard. Materials and methods: By means of the conformation of a multidisciplinary group, we analyze the burden of the disease relative to the lung cancer and the access to the medical treatment offered by the different public health subsystems in Mexico. Results: Important inequalities in lung cancer care are documented among the different public health subsystems. Our data suggest differential access and coverage to both traditional treatments and existing therapeutic innovations and differences in the capacity of health service providers to guarantee the right to health protection without distinction. Conclusions: Recommendations are made on the need to improve actions for tobacco control, early diagnosis for lung cancer and inclusion of innovative therapies and homologation among different public health service providers through financing via tobacco taxes.

[Do some conditions contribute to the reemergence of the Venezuelan equine encephalitis virus in the Colombian Alta Guajira?]. / ¿Existen condiciones que favorecen la reaparición del virus de la encefalitis equina venezolana en la Alta Guajira colombiana?

INTRODUCTION: In the last 18 years, epizootics of Venezuelan equine encephalitis have not occurred in places with historic epidemic register (1925-1995) in the Guajira Peninsula, Colombia. OBJECTIVE: To assess if the Guajira Peninsula, Colombia, still maintains the epidemiological conditions for Venezuelan equine encephalitis virus reemergence. MATERIALS AND METHODS: Research was carried out in places affected by the 1995 epidemic. We evaluated: 1) abundance and seasonal variation of vector mosquito populations; 2) availability of mammals that are potential amplifiers of the virus, and 3) knowledge among the community about the disease and its vectors. RESULTS: Most of the 16 mosquito species were found during the rainy season. Aedes taeniorhynchus and Psorophora confinnis showed direct relation with rainfall and temperature. In contrast, the dominant species, Deinocerites atlanticus , was always present in the collections, regardless of climatic conditions. No IgG antibodies were found in humans younger than 17 years old, goats or bovine sera. One third of those interviewed remembered the last epidemic and had basic understanding of the disease. Only 20% of the families were owners of equines, and 8% was informed of the importance of equine vaccination. CONCLUSIONS: Some epidemiological conditions that eventually could help epizootic Venezuelan equine encephalitis virus reemergence are maintained. However, an abrupt decrease in the number of susceptible equines was found in the area. Apparently, this new condition has not allowed the virus reemergence and is the biggest observed change.

AtTCTP2, an Arabidopsis thaliana homolog of Translationally Controlled Tumor Protein, enhances in vitro plant regeneration.

The Translationally Controlled Tumor Protein (TCTP) is a central regulator of cell proliferation and differentiation in animals, and probably also in plants. Arabidopsis harbors two TCTP genes, AtTCTP1 (At3g16640), which is an important mitotic regulator, and AtTCTP2 (At3g05540), which is considered a pseudogene. Nevertheless, we have obtained evidence suggesting that this gene is functional. Indeed, a T-DNA insertion mutant, SALK_045146, displays a lethal phenotype during early rosette stage. Also, both the AtTCTP2 promoter and structural gene are functional, and heterozygous plants show delayed development. AtTCTP1 cannot compensate for the loss of AtTCTP2, since the accumulation levels of the AtTCTP1 transcript are even higher in heterozygous plants than in wild-type plants. Leaf explants transformed with Agrobacterium rhizogenes harboring AtTCTP2, but not AtTCTP1, led to whole plant regeneration with a high frequency. Insertion of a sequence present in AtTCTP1 but absent in AtTCTP2 demonstrates that it suppresses the capacity for plant regeneration; also, this phenomenon is enhanced by the presence of TCTP (AtTCTP1 or 2) in the nuclei of root cells. This confirms that AtTCTP2 is not a pseudogene and suggests the involvement of certain TCTP isoforms in vegetative reproduction in some plant species.

Técnica y efectividad biomecánica del remate en el voleibol: revisión bibliográfica / Technical and biomechanical effectivity to spike in volleyball: literature review

En el voleibol el remate es la acción de ataque más agresiva dentro del juego por medio del cual se obtienen la mayor cantidad de puntos. En la técnica de remate, es importante golpear el balón a la mayor altura posible e imprimirle velocidad y trayectoria. La efectividad desde el punto de vista biomecánico está dada por adquirir la mayor altura posible del centro de masa para golpear el balón lo más alto posible e imprimir velocidad y precisión en la trayectoria del balón. El objetivo del presente trabajo es ofrecer una revisión del conocimiento científico disponible en los últimos 20 años sobre el remate, con el fin de establecer el estado actual de los factores biomecánicos relacionados con su rendimiento e impulsar una visión crítica a los entrenadores generando herramientas científicas para planificar sus entrenamientos. Los principales hallazgos de la presente revisión bibliográfica fueron, por un lado, la poca existencia de información sobre la técnica de remate del voleibol, y por otro lado, a pesar de existir un déficit de evidencia científica, las investigaciones se centran en los factores biomecánicos relacionados con los criterios de eficacia del remate, como la velocidad del centro de masa en la batida, la elevación del centro de masa, el tipo de armado, y la velocidad angular de la mano. En cuanto a los estudios de intervención analizados sobre el rendimiento del remate, el mayor número de publicaciones se obtuvo desde el 2011 a la actualidad, dejando en evidencia que el avance científico aun está en proceso.

In volleyball the spike is the most aggressive action attack in the game, in which the majority of points is obtained. In the art spike, it is important to hit the ball as high as possible and to give it speed and trajectory. Since the biomechanical point of view, the effect is given by acquiring the greatest possible height of the center of mass, and to hit the ball as high as possible to give speed and accuracy in the trajectory of the ball. The objective of this study is to provide a revision of the available scientific knowledge of the last 20 years about the spike with the only purpose of establishing the state of actual biomechanical factors in relation to its performance and promote a critical point of view to the coaches giving scientific tools to plan trainings. The main findings of this literature review were, on the one hand, the poor information about the spike techniques in volleyball. On the other hand, despite on the luck of scientific evidences, the researcher focuses on biomechanical factors related to the performance criteria of the spike like the speed of the center of the mass in the impulse, the elevation of de center of the mass, type reinforced, and the angular velocity of the hand. About the studies of intervention analyzed on the performance of the spike, the highest number of publications was obtained since 2011 to nowadays, making it clear that scientist advancements are still in process.

¿Existen condiciones que favorecen la reaparición del virus de la encefalitis equina venezolana en la Alta Guajira colombiana? / Do some conditions contribute to the reemergence of the Venezuelan equine encephalitis virus in the Colombian Alta Guajira?

Introducción. En los últimos 18 años, no se han vuelto a registrar epizootias de encefalitis equina venezolana en áreas con antecedentes históricos de epidemia (1925-1995) en la península de La Guajira. Objetivo. Establecer si en la Alta Guajira colombiana se mantienen las condiciones que favorecen la reaparición de las cepas epizoóticas del virus de la encefalitis equina venezolana. Materiales y métodos. La investigación se realizó en las localidades afectadas por la epidemia de 1995, y se evaluaron los siguientes aspectos: 1) abundancia y variación estacional de las poblaciones de los mosquitos vectores; 2) disponibilidad de mamíferos sensibles amplificadores del virus, y 3) conocimiento de los habitantes sobre la enfermedad y sus vectores. Resultados. La mayoría de las especies de mosquitos, incluidas las de los vectores, se encontraron durante la estación lluviosa. Aedes taeniorhynchus y Psorophora confinnis presentaron relación con la precipitación y la temperatura. Deinocerites atlanticus estuvo siempre presente, independientemente de las condiciones climáticas. No se encontraron anticuerpos de tipo IgG en los sueros de humanos menores de 17 años, tampoco en los de los animales caprinos y bovinos analizados. En la encuesta sobre conocimientos, se detectó que la tercera parte de los encuestados recordaba la última epidemia y tenía conocimientos básicos sobre la enfermedad. Solamente 20 % de las familias poseía équidos y el 8 % estaba informado sobre la necesidad de vacunarlos. Conclusiones. Se mantienen algunas condiciones epidemiológicas que eventualmente podrían favorecer la reaparición del virus, pero el número de equinos en riesgo es escaso, lo cual constituye el cambio más notable y lo que, aparentemente, ha impedido la reaparición del virus.

Introduction: In the last 18 years, epizootics of Venezuelan equine encephalitis have not occurred in places with historic epidemic register (1925-1995) in the Guajira Peninsula, Colombia. Objective: To assess if the Guajira Peninsula, Colombia, still maintains the epidemiological conditions for Venezuelan equine encephalitis virus reemergence. Materials and methods: Research was carried out in places affected by the 1995 epidemic. We evaluated: 1) abundance and seasonal variation of vector mosquito populations; 2) availability of mammals that are potential amplifiers of the virus, and 3) knowledge among the community about the disease and its vectors. Results: Most of the 16 mosquito species were found during the rainy season. Aedes taeniorhynchus and Psorophora confinnis showed direct relation with rainfall and temperature. In contrast, the dominant species, Deinocerites atlanticus , was always present in the collections, regardless of climatic conditions. No IgG antibodies were found in humans younger than 17 years old, goats or bovine sera. One third of those interviewed remembered the last epidemic and had basic understanding of the disease. Only 20% of the families were owners of equines, and 8% was informed of the importance of equine vaccination. Conclusions: Some epidemiological conditions that eventually could help epizootic Venezuelan equine encephalitis virus reemergence are maintained. However, an abrupt decrease in the number of susceptible equines was found in the area. Apparently, this new condition has not allowed the virus reemergence and is the biggest observed change.

Ethnic differences in the use of intrapartum epidural analgesia.

BACKGROUND: Obstetric epidural analgesia (EA) is widely applied, but studies have reported that its use may be less extensive among immigrant women or those from minority ethnic groups. Our aim was to examine whether this was the case in our geographic area, which contains an important immigrant population, and if so, to describe the different components of this phenomenon. METHODS: Cross-sectional observational study. SETTING: general acute care hospital, located in Marbella, southern Spain. Analysis of computer records of deliveries performed from 2004 to 2010. Comparison of characteristics of deliveries according to the mothers' geographic origins and of vaginal deliveries noting whether EA was received, using univariate and bivariate statistical analysis and multiple logistic regression (MLR). RESULTS: A total of 21,034 deliveries were recorded, and 37.4% of these corresponded to immigrant women. EA was provided to 61.1% of the Spanish women and to 51.5% of the immigrants, with important variations according to geographic origin: over 52% of women from other European countries and South America received EA, compared with around 45% of the African women and 37% of the Asian women. These differences persisted in the MLR model after adjusting for the mother's age, type of labor initiation, the weight of the neonate and for single or multiple gestation. With the Spanish patients as the reference category, all the other countries of origin presented lower probabilities of EA use. This was particularly apparent for the patients from Asia (OR 0.38; 95%CI 0.31-0.46), Morocco (OR 0.49; 95%CI 0.43-0.54) and other Africa (OR 0.55; 95%CI 0.37-0.81). CONCLUSIONS: We observed a different use of EA in vaginal deliveries, according to the geographic origin of the women. The explanation for this involves a complex set of factors, depending both on the patient and on the healthcare staff.