Risk for Waterborne Transmission and Environmental Persistence of Avian Influenza Virus in a Wildlife/Domestic Interface in Mexico.

Aquatic habitats provide a bridge for influenza transmission among wild and domestic species. However, water sources pose highly variable physicochemical and ecological characteristics that affect avian influenza virus (AIV) stability. Therefore, the risk of survival or transmissibility of AIV in the environment is quite variable and has been understudied. In this study, we determine the risk of waterborne transmission and environmental persistence of AIV in a wild/domestic bird interface in the Central Mexico plateau (North America) during the winter season using a multi-criteria decision analysis (MCDA). A total of 13 eco-epidemiological factors were selected from public-access databases to develop the risk assessment. The MCDA showed that the Atarasquillo wetland presents a higher persistence risk in January. Likewise, most of the backyard poultry farms at this wild-domestic interface present a high persistence risk (50%). Our results suggest that drinking water may represent a more enabling environment for AIV persistence in contrast with wastewater. Moreover, almost all backyard poultry farms evidence a moderate or high risk of waterborne transmission especially farms close to water bodies. The wildlife/domestic bird interface on the Atarasquillo wetland holds eco-epidemiological factors such as the presence of farms in flood-prone areas, the poultry access to outdoor water, and the use of drinking-water troughs among multiple animal species that may enhance waterborne transmission of AIV. These findings highlight the relevance of understanding the influence of multiple factors on AIV ecology for early intervention and long-term control strategies.

Trypanosoma cruzi in Wild and Synanthropic Mammals in Two Regions of Mexico: A Fieldwork and Genetic Discrete Typing Unit Review.

Background: Marsupials and rodents are the most important wild and synanthropic hosts of Trypanosoma cruzi due to the high frequency of infection, maintenance of diverse genetic populations of the parasite, and their close proximity to interact with both transmission cycles, sylvatic and peridomestic. Our aim was to identify the discrete typing units (DTU) of T. cruzi from different wild and synanthropic hosts in two regions of Mexico and to carry out a review of historical data focusing on current knowledge on the diversity and T. cruzi DTUs of host species. Materials and Methods: One hundred fifteen samples were obtained from two areas in Tabasco and Nayarit state. The presence of T. cruzi was evaluated by PCR. Results: The 12.6% (12/95) of samples from Tabasco and 65% (13/20) from Nayarit were found to be positive for parasite DNA. All the sequences analyzed were grouped in T. cruzi DTU I; low nucleotide diversity was observed in Tabasco (π = 0.00566, and Ï´ = 0.00632), while high genetic diversity was observed in Nayarit sequences, up to 8.63 (π) to 11.10 (Ï´) times greater than Tabasco sequences. Genetic flow and migration between Tabasco, and Nayarit were scarce (FST = 0.37329 and Nm = 0.42), and genetic exchange was observed only between nearby areas. The bibliographic review of hosts in Mexico, together with our data, shows a heterogeneous T. cruzi prevalence in Chiroptera and domestic animals. For Atelidae and Canids, prevalence is generally below 25%. However, a high prevalence, greater than 25% and up to 100%, was recorded in Didelphimorphia, and Rodentia. Few studies in regions of Mexico have been described as infected with the parasite; in these, the genetic group with the highest prevalence is the DTU I. Conclusion: Marsupials and rodents are important reservoirs of T. cruzi; DTU I was frequently reported; however, recent genetic and reservoir studies have demonstrated the presence of greater diversity of genetic groups.

Canine parvovirus type 2 (CPV-2) serological and molecular patterns in dogs with viral gastroenteritis from southern Brazil.

Canine Parvovirus type 2 (CPV-2) is a highly contagious virus that can cause severe systemic disease with gastroenteric symptoms in dogs, particularly in young puppies. Originating from the feline parvovirus in the late 1970s, it swiftly propagated globally, instigating a pandemic in dogs. Despite vaccination advancements, CPV-2 remains a substantial challenge for veterinary professionals and pet owners. This study aimed to contribute knowledge about the current situation of CPV-2 among dogs in southern Brazil. In this study, the sera of 125 dogs (mostly with gastroenteritis symptoms) were screened for antibodies against CPV-2 and their faeces for the virus itself. The results showed that 40% (50/125) of dogs were infected with CPV-2. Most animals (65.5%) had previously been exposed to CPV-2 (with serotitres equal or above 1:40), and only 37.6% had protective antibody titres equal or above 1:80. The findings have also demonstrated that vaccination against CPV-2 significantly reduced the risk of infection, with positive cases decreasing from 56.9% (unvaccinated) to 2.0% (fully vaccinated). Furthermore, the prevalence of CPV-2 decreased as dogs aged, with younger dogs and those with an incomplete or non-existent vaccination history at the highest risk of infection. In conclusion, this study provides valuable insight into the prevalence and risk factors associated with CPV-2 infection in dogs in southern Brazil, thereby providing valuable knowledge for the improvement of veterinary care and pet health.

[Depression in health personnel associated with exposure to COVID-19]. / Depresión en personal de salud asociado a la exposición de la COVID-19.

Background: There are many working factors to do with depression. Objective: To determine the association between the exposure to COVID-19 and depression in physicians and nurses from the four hospitals at "Centro Médico Nacional Siglo XXI" (CMN SXXI) took part in: Oncology, Specialties, Cardiology and Pediatrics. Material and Methods: A cross-sectional study of 856 participants took place in January 2022, excluding workers, such as physicians and nurses from the CMN SXXI, disabled workers, staff with a union agreement, support staff and/or staff with less than one year of work labour. Through a self-administered questionnaire, the degree of occupational exposure to patients care with COVID-19, a history of COVID-19 infection, and the patient's health quiz were asked (PHQ-9). The analysis included simple frequency measurements, odds ratio (OR), Chi squared and multiple logistics regression with p ≤ 0.05. Results: The prevalence of depression in the medical and nursing staff at CMN SXXI was 32.2% (moderate to severe degree); In the multiple regression, an association was identified with not identifying support by the Institute (OR: 1.60, CI95%: 1.08-2.39, p = 0.02), high occupational exposure (OR: 8.35, CI95%: 3.02-23.09, p ˂ 0.0001), and more than 5 working days a week serving the COVID-19 patients (OR: 2.51, CI95%: 1.35-4.49, p = 0.004) and as a protective factor the fact that they have never had the COVID-19 (OR: 0.61, CI95%: 0.43-0.86, p = 0.01). Conclusions: The prevalence of depression was higher than expected being associated with the degree of occupational exposure in the COVID-19 patients´ assistance.

Introducción: existen factores laborales que influyen en la presencia de la depresión. Objetivo: determinar la asociación entre la exposición a la COVID-19 y la depresión en médicos y enfermeras de los cuatro hospitales del Centro Médico Nacional Siglo XXI (CMN SXXI): Oncología, Especialidades, Cardiología y Pediatría. Material y métodos: se realizó un estudio transversal, en enero del 2022, con 870 participantes pertenecientes a la población de médicos y enfermeras que laboraban en el CMN SXXI, se excluyó a los trabajadores que se encontraban con incapacidad, al personal temporal y/o con menos de un año de antigüedad laboral. A través de un cuestionario autoaplicable se interrogó sobre el grado de exposición laboral a la atención de pacientes con COVID-19, antecedentes de infección por la COVID-19 y el cuestionario de salud del paciente (PHQ-9). El análisis incluyo medidas de frecuencia simple y razón de Momios (RM), Chi cuadrada y regresión logística múltiple con p ≤ 0.05. Resultados: la prevalencia de depresión en personal médico y de enfermería del CMN SXXI fue del 32.2% (grado moderado a severo). En la regresión múltiple se encontró asociación con no identificar apoyo por parte del Instituto (RM: 1.60, IC95%: 1.08-2.39, p = 0.02), alta exposición laboral (RM: 8.35, IC95%: 3.02-23.09, p ˂ 0.0001) y más de 5 días laborados a la semana atendiendo pacientes con la COVID-19 (RM: 2.51, IC95%: 1.35-4.49, p = 0.004) y como factor protector el que nunca hayan enfermado de la COVID-19 (RM: 0.61, IC95%: 0.43-0.86, p = 0.01). Conclusiones: la prevalencia de depresión fue mayor a la esperada y se asoció con el grado de exposición laboral en la atención de pacientes con la COVID-19.

Effects of Fructose and Palmitic Acid on Gene Expression in Drosophila melanogaster Larvae: Implications for Neurodegenerative Diseases.

One of the largest health problems worldwide is the development of chronic noncommunicable diseases due to the consumption of hypercaloric diets. Among the most common alterations are cardiovascular diseases, and a high correlation between overnutrition and neurodegenerative diseases has also been found. The urgency in the study of specific damage to tissues such as the brain and intestine led us to use Drosophila melanogaster to study the metabolic effects caused by the consumption of fructose and palmitic acid in specific tissues. Thus, third instar larvae (96 ± 4 h) of the wild Canton-S strain of D. melanogaster were used to perform transcriptomic profiling in brain and midgut tissues to test for the potential metabolic effects of a diet supplemented with fructose and palmitic acid. Our data infer that this diet can alter the biosynthesis of proteins at the mRNA level that participate in the synthesis of amino acids, as well as fundamental enzymes for the dopaminergic and GABAergic systems in the midgut and brain. These also demonstrated alterations in the tissues of flies that may help explain the development of various reported human diseases associated with the consumption of fructose and palmitic acid in humans. These studies will not only help to better understand the mechanisms by which the consumption of these alimentary products is related to the development of neuronal diseases but may also contribute to the prevention of these conditions.

Spatial predictions of tree density and tree height across Mexico forests using ensemble learning and forest inventory data.

The National Forestry Commission of Mexico continuously monitors forest structure within the country's continental territory by the implementation of the National Forest and Soils Inventory (INFyS). Due to the challenges involved in collecting data exclusively from field surveys, there are spatial information gaps for important forest attributes. This can produce bias or increase uncertainty when generating estimates required to support forest management decisions. Our objective is to predict the spatial distribution of tree height and tree density in all Mexican forests. We performed wall-to-wall spatial predictions of both attributes in 1-km grids, using ensemble machine learning across each forest type in Mexico. Predictor variables include remote sensing imagery and other geospatial data (e.g., mean precipitation, surface temperature, canopy cover). Training data is from the 2009 to 2014 cycle (n > 26,000 sampling plots). Spatial cross validation suggested that the model had a better performance when predicting tree height r 2 = .35 [.12, .51] (mean [min, max]) than for tree density r 2 = .23 [.05, .42]. The best predictive performance when mapping tree height was for broadleaf and coniferous-broadleaf forests (model explained ~50% of variance). The best predictive performance when mapping tree density was for tropical forest (model explained ~40% of variance). Although most forests had relatively low uncertainty for tree height predictions, e.g., values <60%, arid and semiarid ecosystems had high uncertainty, e.g., values >80%. Uncertainty values for tree density predictions were >80% in most forests. The applied open science approach we present is easily replicable and scalable, thus it is helpful to assist in the decision-making and future of the National Forest and Soils Inventory. This work highlights the need for analytical tools that help us exploit the full potential of the Mexican forest inventory datasets.

High baseline expression of IL-6 and IL-10 decreased CCR7 B cells in individuals with previous SARS-CoV-2 infection during BNT162b2 vaccination.

The current pandemic generated by SARS-CoV-2 has led to mass vaccination with different biologics that have shown wide variations among human populations according to the origin and formulation of the vaccine. Studies evaluating the response in individuals with a natural infection before vaccination have been limited to antibody titer analysis and evaluating a few humoral and cellular response markers, showing a more rapid and intense humoral response than individuals without prior infection. However, the basis of these differences has not been explored in depth. In the present work, we analyzed a group of pro and anti-inflammatory cytokines, antibody titers, and cell populations in peripheral blood of individuals with previous SARS-CoV-2 infection using BNT162b2 biologic. Our results suggest that higher antibody concentration in individuals with an earlier disease could be generated by higher production of plasma cells to the detriment of the presence of memory B cells in the bloodstream, which could be related to the high baseline expression of cytokines (IL-6 and IL-10) before vaccination.

Clinical presentation of pediatric patients with symptomatic SARS-CoV-2 infection during the first months of the COVID-19 pandemic in a single center in Mexico City.

Background: The clinical spectrum of COVID-19 is broad, from asymptomatic to severe cases and death. The objective of this study is to analyze the clinical course of patients attended during the first months of the SARS-CoV-2 pandemic in a third-level pediatric hospital. Methods: Design: prospective cohort study. Patients with viral respiratory disease or suspected cases of COVID-19 were evaluated at the Pediatric Hospital, National Medical Center XXI Century, Mexico City, from 21 March 2020 to 13 January 2021. Statistical analysis: Chi-square test and Fisher's exact test were used for comparisons; a logistic regression model was constructed to identify clinical or laboratory characteristics associated with critical disease. A p-value < 0.05 was considered statistically significant. Results: A total of 697 patients met the operational definition of viral respiratory disease or suspected cases of COVID-19 and underwent real-time reverse transcription polymerase chain reaction (rRT-PCR) SARS-CoV-2 testing. Patients with a positive result were included. Of the 181 patients (26%), 121 (66.8%) had mild disease and were treated as outpatients and 60 (33.1%) were hospitalized. A total of six patients met the criteria for multisystem inflammatory syndrome in children (MIS-C). Of the 60 inpatients, 65% were males, and 82% had one or more comorbidities. The main comorbidities were cancer (42%) and overweight (15%). The median hospital stay was 9 days. The inpatients had a higher frequency of fever, general malaise, dyspnea, chills, polypnea, and cyanosis than the outpatients (p < 0.05). Only 21.4% of the outpatients had one or more comorbidities, which were lower than in the hospitalized patients (p < 0.001). Laboratory data at admission were similar between critically ill and those with moderate and severe disease. The patients who developed pneumonia were at higher risk of critical disease, while older age was associated with a better prognosis. A total of 13 of the 60 inpatients died (mortality 7.1%). All but one had one or more comorbidities: four had cancer, four congenital heart disease, one chronic kidney disease and epilepsy, one Epstein-Barr virus-induced hemophagocytic lymphohistiocytosis, one obesity, and one diabetes mellitus. Conclusion: Hospital mortality is high, especially in children with comorbidities. Despite 2 years having passed since the beginning of the COVID-19 pandemic, the epidemiological and clinical data on children are still helpful to improve their prognosis.

Las TICs aplicada a la salud mental comunitaria y enfermedades endémicas / ICTs applied to community mental health and endemic diseases

Las enfermedades tropicales desatendidas suelen presentar una evolución crónica y se caracterizan por producir discapacidad física y mental a quienes las padecen, siendo asociadas a la estigmatización social. Se realizó un estudio descriptivo en 182 pacientes con enfermedades tropicales en regiones endémicas para leishmania, enfermedad de Chagas, filariasis linfática, oncocercosis, dengue y parasitosis intestinales; con el fin de evaluar la salud mental comunitaria, aplicando las tecnologias de información y comunicación (TIC), mediante el uso de telefónos móviles y telefonía fija. Se aplicó una encuesta para valorar el conocimiento y disposición de los pacientes respecto a las TIC, se valoró la salud mental calificada y la percibida por los pacientes mediante una escala de Likert. A partir de la calificación de la salud mental comunitaria se asociaron los estigmas sobre las enfermedades endémicas y luego se aplicó una encuesta para conocer la percepción de los pacientes, respecto a la influencia de los estigmas en la salud mental comunitaria. La mayor proporción de los participantes coincidieron en ser evaluados por parte del personal de salud, mediante herramientas de TIC y manifestaron tener problemas emocionales. Asimismo, el rechazo social como las secuelas de la enfermedad resultaron ser las manifestaciones más frecuentes de los participantes. En conclusión, el empleo de las TIC, en el área de salud mental comunitaria, supone un avance importante en el intercambio de información entre terapeutas y pacientes con enfermedades tropicales desatendidas, contribuyendo a disminuir el estigma social al que se ven sometidos y reestablecer su bienestar mental(AU)

Neglected tropical diseases usually present a chronic evolution and are characterized by causing physical and mental disability to those who suffer from them, being associated with social stigmatization. A descriptive study was carried out in 182 patients with tropical diseases in endemic regions for leishmania, Chagas disease, lymphatic filariasis, onchocerciasis, dengue and intestinal parasites; in order to assess community mental health, applying information and communication technologies (ICT), through the use of mobile phones and landlines. A survey was applied to assess the knowledge and disposition of the patients regarding ICT, the qualified mental health and that perceived by the patients was assessed using a Likert scale. From the qualification of community mental health, stigmas about endemic diseases were associated and then a survey was applied to know the perception of patients regarding the influence of stigmas in community mental health. The largest proportion of the participants agreed to be evaluated by health personnel, using ICT tools, and reported having emotional problems. Likewise, social rejection as the sequelae of the disease turned out to be the most frequent manifestations of the participants. In conclusion, the use of ICTs in the area of community mental health represents an important advance in the exchange of information between therapists and patients with neglected tropical diseases, helping to reduce the social stigma to which they are subjected and reestablish their mental health(AU)

Molecular detection of Rickettsia amblyommatis and Rickettsia parkeri in ticks collected from wild pigs in Campeche, Mexico.

Tick-borne rickettsioses are caused at least by 15 species of Rickettsia of the Spotted fever group, which represent a major emerging and re-emerging public health problem worldwide. Some of these microorganisms have complex cycles involving the interaction of multiple species of ticks and wild and domestic mammals. Rickettsia infection was investigated in ticks collected from wild pigs at six localities in southeastern Mexico. We collected and tested 196 ticks belonging to four species, including Amblyomma maculatum, Amblyomma mixtum, Amblyomma ovale and Riphicephalus microplus, from 13 of 20 (65%) wild pigs sampled. Overall, Rickettsia DNA was detected in 13.8% of ticks tested (10 ♂ and 17 ♀). Of the 27 Rickettsia-positive ticks, six were A. maculatum, and 21 A. mixtum. Sequencing and phylogenetic analysis of the gltA and ompB genes revealed the presence of Rickettsia parkeri sensu stricto in one female A. maculatum and Rickettsia amblyommatis in five A. maculatum (2 ♂, 3 ♀) and 21 A. mixtum ticks (8 ♂, 13 ♀). The finding of two rickettsial agents in ticks collected from a wild pig population that is regularly captured and kept in captivity or hunted as a source of food raises concern about potential disease transmission to humans and domestic animals. However, more investigations are needed to further understand the ecology of Rickettsia species in free-ranging animals and their implications for human health.

Competencias para la gestión educativa universitaria online: La epidemiología de enfermedades infecciosas tropicales / Competencies for online university educational management: The epidemiology of tropical infectious diseases

El enfoque por competencias se ha venido aplicando en todo el sector educativo, y ha tomado el rumbo universitario donde ha pisado fuertemente. Esto se debe a las ofertas de trabajo en donde las competencias son de carácter esencial. El enfoque por competencia ha logrado reorientar la formación profesional desde la elaboración de los perfiles de ingreso, de egreso, diseños curriculares, estrategias metodológicas y sistema de evaluación que son distintos a los enfoques tradicionales. Es por ello que, la gerencia online se perfila como herramienta novedosa que podría la problemática de la presencialidad en estos tiempos coyunturales que se vive, no solamente por efectos de pandemias, como el coronavirus, sino también por la dinámica de la sociedad actual. Como la gestión de la educación es una realidad que requiere de competencias, entonces se estaría hablando de las competencias digitales, para poder asumir el reto y la realidad de poder gerenciar de manera virtual u online. Por otra parte, el desarrollo de las competencias primarias unidas hoy en día con las competencias digitales ha hecho que ciertas disciplinas científicas hayan logrado avances significativos, y una de ellas son las enfermedades epidemiológicas asociadas a las enfermedades tropicales. En este trabajo se establecen y asignas las competencias necesarias para enfrentar las enfermedades infecciosas tropicales, y además se evalúa el efecto de la gerencia online en este mismo sector. Los resultados demostraron que el sistema peruano se encuentra preparado para estos nuevos retos, y se acepta la participación de las nuevas tecnologías digitales(AU)

The competency-based approach has been applied throughout the educational sector, and has taken the university course where it has stepped strongly. This is due to job offers where skills are essential. The competency-based approach has managed to reorient professional training from the preparation of entry and exit profiles, curricular designs, methodological strategies and evaluation systems that are different from traditional approaches. That is why online management is emerging as a novel tool that could address the problem of attendance in these current times, not only due to the effects of pandemics, such as the coronavirus, but also due to the dynamics of today's society. As the management of education is a reality that requires skills, then we would be talking about digital skills, to be able to take on the challenge and the reality of being able to manage virtually or online. On the other hand, the development of primary skills combined today with digital skills has meant that certain scientific disciplines have made significant progress, and one of them is the epidemiological diseases associated with tropical diseases. In this work, the necessary skills to face tropical infectious diseases are established and assigned, and the effect of online management in this same sector is also evaluated. The results showed that the Peruvian system is prepared for these new challenges, and the participation of new digital technologies is accepted(AU)

Monitoreo de la vigilancia, prevención y control de las enfermedades transmitidas por el Aedes aegypti / Surveillance monitoring, prevention and control of diseases transmitted by Aedes Aegypti

La actual propuesta metodológica se enmarca en los dos primeros objetivos del Plan Nacional de la Lucha contra el Dengue, que son promover, coordinar y facilitar la implementación de estrategias eficaces y oportunas para el control y tratamiento del dengue, con especial énfasis en las zonas geográficas del país que presentan alto riesgo potencial epidémico de dicha enfermedad, y gestionar la cooperación técnica destinada al control y manejo del dengue. En la fase inicial, se determinaron las actividades y variables sensibles a monitoreo, en base a los objetivos e indicadores identificados dentro del marco técnico y normativo vigente en el Perú y el marco sanitario establecido por la OMS, correspondientes a la vigilancia, prevención y control, pero, además, a la promoción de prácticas saludables. Luego, se definieron los requerimientos no funcionales de la plataforma de monitoreo para el desarrollo de un aplicativo accesible a través de un navegador en cualquier dispositivo con acceso a internet, a ser alojado en la plataforma de Cloud Computing. Posteriomente, se realizó el flujograma para el monitoreo de la clasificación de escenarios epidemiológicos y estratificación de riesgo entomológico de las enfermedades transmitidas por el Aedes aegypti. Finalmente, tanto la estratificación de riesgo como los indicadores obtenidos en cada localidad son escalados a la unidad notificante, encarcada de la ratificación, análisis y toma de desiciones jurisdiccionales. Se realizó una prueba piloto en 50 distritos de la jurisdicción de Lima Metropolitana. Se encontró que once distritos fueron estratificados en escenario II, y cuatro distritos en escenario III(AU)

The current methodological proposal is part of the first two objectives of the National Plan to Fight Dengue, which are to promote, coordinate and facilitate the implementation of effective and timely strategies for the control and treatment of dengue, with special emphasis on geographical areas. of the country that present a high potential epidemic risk of this disease and manage technical cooperation for the control and management of dengue. In the initial phase, the activities and variables sensitive to monitoring were determined, based on the objectives and indicators identified within the technical and regulatory framework in force in Peru and the health framework established by the WHO, corresponding to surveillance, prevention, and control; but also, to the promotion of healthy practices. Then, the non-functional requirements of the monitoring platform were defined for the development of an application accessible through a browser on any device with Internet access, to be hosted on the Cloud Computing platform. Subsequently, the flowchart was made to monitor the classification of epidemiological scenarios and entomological risk stratification of diseases transmitted by Aedes aegypti. Finally, both the risk stratification and the indicators obtained in each locality are escalated to the notifying unit, in charge of the ratification, analysis and making of jurisdictional decisions. A pilot test was carried out in 50 districts of the jurisdiction of Metropolitan Lima. It was found that eleven districts were stratified in stage II, and four districts in stage III(AU)

α-1 Adrenoceptor Activation in the Dorsal Raphe Nucleus Decreases Food Intake in Fasted Rats.

The dorsal raphe (DR) nucleus is involved in a myriad of physiological functions, such as the control of sleep-wake cycle, motivation, pain, energy balance, and food intake. We have previously demonstrated that in ad libitum fed rats the intra-DR administration of phenylephrine, an α-1 receptor agonist, does not affect food intake, whereas clonidine, an α-2 receptor agonist, potently stimulates food intake. These results indicated that in fed rats an increased adrenergic tonus blocked food intake, since the activation of α-2 auto-receptors, which decreases pre-synaptic release of adrenaline/noradrenaline, affected food intake. Thus, in this study we assessed whether the response to adrenergic stimuli would differ after overnight fasting, a situation of low adrenergic activity in the DR. Intra-DR administration of adrenaline and noradrenaline blocked food intake evoked by overnight fasting. Similarly, phenylephrine administration decreased hunger-induced food intake. These changes in food intake were accompanied by changes in other behaviors, such as increased immobility time and feeding duration. On the other hand, intra-DR administration of clonidine did not affect food-intake or associated behaviors. These results further support the hypothesis that in fed animals, increased adrenergic tonus in DR neurons inhibiting feeding, while in fasted rats the adrenergic tonus decreases and favors food intake. These data indicate a possible mechanism through which adrenergic input to the DRN contributes to neurobiology of feeding.

El reto de la Educación 4. 0 a nivel universitario de cara a la emergencia por COVID-19 / The challenge of Education 4. 0 at the university level in the face of the COVID-19 emergency

El cierre de universidades, generado por la pandemia de la COVID-19, ha llevado a los países del mundo entero a enfrentar el desafío de la educación remota de emergencia. En latinoamérica, las acciones implementadas para prevenir la propagación del virus obligaron a los ministerios de Educación de la región al cierre de los centros educativos, dejando en marzo de 2020 más de 165 millones de estudiantes sin educación presencial. A partir de las realidades expuestas, una educación 4.0 que promueve al aprendizaje no sólo de habilidades y conocimientos. Bajo el modelo pedagógico aula inversa presencial y a distancia, se evaluo el aprendizaje autodirigido global y por dominios, sobre sobre las enfermedades infectocontagiosas y precauciones de aislamiento en la atención hospitalaria, en los estudiantes universitarios de enfermería, se valoran por los dominios de la Escala de Preparación para el Aprendizaje Autodirigido. De 144, estudiantes la edad fue de 21,73± 1,27 años, para ambos grupos AIP y AID, de los cuales, el 61,81% (n=89) son del sexo femenino, la EPAD para AIP fue de 3,64 ± 0,84 y para AIP de 3,89± 0,93 y un el alfa de Cronbach de 0,89. El nivel de aprendizaje autodirigido de los estudiantes en un aula invertida en ambas modalidades fue similar, se explica porque de la enseñanza interactiva, sincrónica y orientada a la resolución de problemas, y desarrollar las habilidades blandas son capacidades comunicativas, de trabajo en equipo, adaptabilidad, empatía, proactividad, autocrítica y flexibilidad frente a situaciones cambiantes(AU)

The closure of universities, generated by the COVID-19 pandemic, has led countries around the world to face the challenge of emergency remote education. In Latin America, the actions implemented to prevent the spread of the virus forced the Ministries of Education in the region to close educational centers, leaving in March 2020 more than 165 million students without face-to-face education. Based on the exposed realities, a 4.0 education that promotes learning not only of skills and knowledge. Under the face-to-face and distance learning inverse classroom pedagogical model, global and domain self-directed learning was evaluated on infectious and contagious diseases and isolation precautions in hospital care, in ursing university students, the domains of the Scale were evaluated. Preparation for Self-Directed Learning. Of 144 students, the age was 21.73± 1.27 years, for both AIP and AID groups, of which 61.81% (n=89) were female, the EPAD for AIP was 3 0.64 ± 0.84 and for AIP 3.89 ± 0.93 and Cronbach's alpha of 0.89. The level of self-directed learning of the students in a flipped classroom in both modalities was similar, it is explained because of the interactive, synchronous and problem-solving oriented teaching, and the development of soft skills are communicative abilities, teamwork, adaptability, empathy, proactivity, self-criticism and flexibility in the face of changing situations(AU)

Actividad antioxidante en genotipos de Theobroma spp. (Malvaceae) en México / Antioxidant activity in genotypes of Theobroma spp. (Malvaceae) in Mexico

Abstract Introduction: The organoleptic qualities of aromatic species and their derived products are directly related to some characteristics of flavor, color and nutritional value and depend largely on their genetic origin and content of secondary metabolites. Objective: The antioxidant activity of different genotypes of Theobroma spp. from Mexico was evaluated in order to distinguish promising qualities for genetic improvement, and to differentiate phylogenetic traits, considering biochemical variables. Methods: The amount of phenols, flavonoids and antioxidant activity was determined by ABTS and DDPH, in addition to the content of anthocyanins, theobromine and caffeine in four species of Theobroma L., and 50 genotypes derived from T. cacao. The results were analyzed using an analysis of variance, means test, principal component analysis and cladistic analysis. Results: There are highly significant differences between genotypes. The phenol content ranged from 7.5-85 mg g-1; flavonoids 6.57-69.6 mg g-1, antioxidant activity by ABTS of 17.3-86.1 and by DDPH of 40.0-53.3; anthocyanin content of 0.01-3, caffeine of 1.8-6.7-and theobromine of 2.9-9.8 mg g-1. Principal component and cladistic analysis helped explain the variation found and distinguish evolutionary characters and phylogenetic brotherhoods. The variation in content of phenols, flavonoids, antioxidant activity, anthocyanins, theobromine and caffeine was mainly due to the degree of domestication, while for the group of genotypes derived from T. cacao (forastero, trinitario and criollo) it was the origin of the seeds. Conclusions: The degree of domestication influences the content of phenols and antioxidant capacity. The results suggest that the evaluated variables can help to form criteria for genetic improvement in the complex derived from T. cacao oriented to the selection of higher phenol content and greater antioxidant activity.

Resumen Introducción: Las cualidades organolépticas de las especies aromáticas y sus productos derivados se relacionan directamente con algunas características del sabor, color y valor nutricional y dependen en gran medida de su origen genético y contenido de metabolitos secundarios. Objetivo: Se evaluó la actividad antioxidante de diferentes genotipos de Theobroma spp. de México, con el fin de distinguir cualidades promisorias para el mejoramiento genético, y diferenciar rasgos filogenéticos, considerando variables bioquímicas. Métodos: Se determinó la cantidad de fenoles, flavonoides y actividad antioxidante mediante ABTS y DDPH, además de contenido de antocianinas, teobromina y cafeína en cuatro especies de Theobroma L., y 50 genotipos derivados de T. cacao. Resultados: Los resultados fueron analizados mediante un análisis de varianza, prueba de medias, análisis de componentes principales y análisis cladístico. Existen diferencias altamente significativas entre genotipos. El contenido de fenoles varió de 7.5-85 mg g-1; flavonoides 6.57-69.6-mg g-1, actividad antioxidante por ABTS de 17.3-86.1 y por DDPH de 40.0-53.3; el contenido de antocianinas de 0.01-3, cafeína de 1.8-6.7 y teobromina de 2.9-9.8 mg g-1. El análisis de componentes principales y cladístico ayudó a explicar la variación encontrada y distinguir caracteres evolutivos y hermandades filogenéticas. La variación en contenido de fenoles, flavonoides, actividad antioxidante, antocianinas, teobromina y cafeína estuvo dada principalmente por el grado de domesticación, mientras que para el grupo de genotipos derivados de T. cacao (forastero, trinitario y criollo) fue el origen de las semillas. Conclusión: El grado de domesticación influye en el contenido de fenoles y actividad antioxidante. Los resultados sugieren que las variables evaluadas pueden ayudar a formar criterios para el mejoramiento genético en el complejo derivado de T. cacao orientado a la selección de mayor contenido de fenoles y mayor actividad antioxidante.

Antimicrobial resistance and antibiotic consumption in a third level pediatric hospital in Mexico City.

INTRODUCTION: The increasing resistance to antibiotics is a public health problem and an imminent therapeutic challenge in hospitals. In this report we aimed to analyze the relationship between antimicrobial resistance and antibiotic consumption in a third-level pediatric hospital. METHODOLOGY: A cross-sectional analysis was conducted using the information from the microbiology and pharmacy databases of the Pediatric Hospital "Doctor Silvestre Frenk Freund", during the period 2015-2018. Prevalence of antimicrobial resistance by microorganisms and dispensed grams of selected antibiotics were calculated annually. Antibiotic resistance trend over the time was evaluated using the Chi-square trends test and to assess the correlation between the dispensed grams of antibiotics with their antimicrobial resistance prevalence, we calculated the Pearson's coefficient (r). RESULTS: A total of 4,327 isolated bacterial samples were analyzed (56.5% Gram-positive and 44.5% Gram-negative). Most frequently isolated microorganisms were coagulase-negative staphylococci (CoNS), E. coli, K. pneumoniae, P. aeruginosa and S. aureus. We found a significant increase in resistance to clindamycin and oxacillin for CoNS and significant decrease in nitrofurantoin and amikacin resistance for E. coli and K. pneumoniae. We observed a strong positive and statistically significant correlation between amikacin resistance prevalence and amikacin dispensed grams for P. aeruginosa (r = 0.95, p = 0.05). CONCLUSIONS: The antibiotic resistance profile showed by our study highlights the need of an appropriate antibiotic control use in the Hospital setting.

Effects of landscape anthropization on sylvatic mosquito assemblages in a rainforest in Chiapas, Mexico.

Global change and ecosystem transformation at regional and local scales during recent decades have facilitated the exponential increase of outbreaks of mosquito-borne diseases. Mosquito-borne pathogens are responsible for millions of infections, mainly in tropical regions where marginalized human populations are located, and where in recent years processes of landscape anthropization have occurred. Anthropogenic landscape transformation is known to change species assemblages. However, the magnitude of these effects is largely unknown, and the effects of anthropogenic landscape transformation on sylvatic mosquito assemblages are poorly known in Mexican ecosystems. We evaluate how mosquito abundance, richness, and diversity change along a gradient of three human-modified landscapes-one highly anthropized, one moderately anthropized, and one slightly anthropized-within a tropical forest matrix in a Protected Natural Area in Chiapas. A total of 4 538 mosquitoes belonging to 23 species were captured and identified at the three sites. We found differences in the structure and abundance of the three mosquito assemblages. The species assemblage of the highly anthropized site was significantly different from the other sites, and the relative abundance of the assemblages increased with landscape anthropization. Our results suggest that landscape anthropization alters the composition and structure of mosquito assemblages, modifying the abundance and species richness of mosquitoes associated with sylvatic ecosystems. This could support the hypothesis of intermediate disturbance that suggests the diversity is maximized when late and early successional species coexist in these ecosystems. This information is essential to understand the ecology of potential sylvatic vectors and the environmental factors that are involved in the emergence and re-emergence of mosquito-borne diseases.

Molecular identification and phylogenetic characterization of influenza A virus at a wildlife-livestock interface in Mexico.

Influenza A virus (IAV) outbreaks constitute a constant threat to public health and pose a remarkable impact on socio-economic systems worldwide. Interactions between wild and domestic birds, humans and swine can lead to spillover events. Backyard livestock systems in proximity to wetlands represent high-risk areas for viral spread. However, some gaps remain in our knowledge of IAV transmission at the wildlife-livestock interface in Mexico. Hence, the study aimed at molecular identification and phylogenetic characterization of IAV in the wild duck-backyard livestock interface at a wetland of Mexico. A total of 875 animals were tested by real-time RT-PCR (qRT-PCR). We detected IAV in 3.68% of the wild ducks sampled during the winter season 2016-2017. Nonetheless, the samples obtained from backyard poultry and swine tested negative. The highest IAV frequency (11.10%) was found in the Mexican duck (Anas diazi). Subtypes H1N1, H3N2 and H5N2 were detected. Phylogenetic analyses revealed that IAV detected in wild birds from the Lerma wetlands was mostly related to swine and poultry IAV strains previously isolated in the United States and Mexico. Except, the UIFMVZ377/H5N2 related to North American waterbirds. In conclusion, the co-circulation of three IAV subtypes in wild ducks close to backyard farms in Mexico, as well as the local identification of influenza viruses genetically related to Mexican and North American IAV strains, highlights the importance of the Lerma marshes for influenza surveillance given the close interaction among wild birds, poultry, pigs and humans.

La inteligencia artificial, una herramienta para la Salud Digital / Artificial intelligence, a tool for Digital Health

El constante avance tecnológico ha permitido la evolución de la práctica médica, generando el concepto denominado salud digital, que consiste en incorporar las tecnologías de información y comunicación a los productos, servicios y procesos de atención sanitaria. Una de las herramientas que permiten este avance es la Inteligencia Artificial (IA), una rama de la informática que desarrolla algoritmos capaces de aprender de los datos y utilizar lo aprendido en la toma de decisiones tal y como lo haría un ser humano. Este estudio se identifica cómo la investigación, las decisiones de diagnóstico, el tratamiento en pacientes y la planificación para la prevención y control de la salud están siendo optimizados gracias a la implementación de la IA, mostrando análisis cuantitativos al nivel de interés y aplicación asociado a estos cuatro procesos con respecto a las enfermedades que más afectan a la población de Perú y Latinoamérica(AU)

The constant technological advance has allowed the evolution of medical practice, generating the concept digital health, which consists of incorporating information and communication technologies into health care products, services and processes. One of the tools that allow this advance is Artificial Intelligence (AI), a branch of computing that develops algorithms capable of learning from data and using what they have learned in decision-making just as a human being would. This study identifies how research, diagnostic decisions, patient treatment and planning for prevention and health control are being optimized thanks to the implementation of AI, showing quantitative analysis at the level of interest and application associated with these four processes with respect to the diseases that most affect the population of Peru and Latin America(AU)

Assemblage variation of mosquitoes (Diptera: Culicidae) in different land use and activity periods within a lowland tropical forest matrix in Campeche, Mexico.

Most mosquito species are active during a certain part of the day, but climatic factors such as light intensity and relative humidity play an important role in the control of their activity. We selected three types of land use that were sampled in state of Campeche in 2018 (low semi-evergreen forest, secondary low semi-evergreen forest, and mango plantation), using ten CDC light traps baited with CO2 , that were active during nine hours of three activity periods (dawn, noon, and nightfall). A GLM was used to investigate changes in the assembly of mosquitoes between different types of land use and temporal variations. Rank abundance curves were used to detect changes in the spatial and activity period of the mosquitoes and we then calculated the Exponential Shannon Index. A total of 6,110 mosquitoes belonging to 23 species were captured. The greatest richness and abundance were found in the secondary low semi-evergreen forest, with greater richness and lower abundance than the mango plantation which showed more abundance. Of the activity periods, dusk had the greatest abundance and richness followed by dawn and finally noon.