Plants from Arid and Semi-Arid Zones of Mexico Used to Treat Respiratory Diseases: A Review.

Medicinal plants have been a traditional remedy for numerous ailments for centuries. However, their usage is limited due to a lack of evidence-based studies elucidating their mechanisms of action. In some countries, they are still considered the first treatment due to their low cost, accessibility, and minor adverse effects. Mexico is in second place, after China, in inventoried plants for medicinal use. It has around 4000 species of medicinal plants; however, pharmacological studies have only been carried out in 5% of its entirety. The species of the Mexican arid zones, particularly in semi-desert areas, exhibit outstanding characteristics, as their adverse growing conditions (e.g., low rainfall and high temperatures) prompt these plants to produce interesting metabolites with diverse biological activities. This review explores medicinal plants belonging to the arid and semi-arid zones of Mexico, focusing on those that have stood out for their bioactive potential, such as Jatropha dioica, Turnera diffusa, Larrea tridentata, Opuntia ficus-indica, Flourensia cernua, Fouquieria splendes, and Prosopis glandulosa. Their extraction conditions, bioactive compounds, mechanisms of action, and biological efficacy are presented, with emphasis on their role in the treatment of respiratory diseases. Additionally, current research, novel applications, and perspectives concerning medicinal plants from these zones are also discussed.

Mechanisms and Applications of Citral's Antimicrobial Properties in Food Preservation and Pharmaceuticals Formulations.

Citral is a monoterpene constituted by two isomers known as neral and geranial. It is present in different plant sources and recognized as safe (GRAS) by the Food and Drug Administration (FDA). In recent years, investigations have demonstrated that this compound exhibited several biological activities, such as antibacterial, antifungal, antibiofilm, antiparasitic, antiproliferative, anti-inflammatory, and antioxidant properties, by in vitro and in vivo assays. Additionally, when incorporated into different food matrices, citral can reduce the microbial load of pathogenic microorganisms and extend the shelf life. This compound has acceptable drug-likeness properties and does not present any violations of Lipinski's rules, which could be used for drug development. The above shows that citral could be a compound of interest for developing food additives to extend the shelf life of animal and vegetable origin foods and develop pharmaceutical products.

Migración de catéter distal a nivel del recto como complicación de derivación ventriculoperitoneal. Reporte de caso / Catheter Migration Through the Rectum as Ventricular Peritoneal Shunt Complication. Case Report

Resumen La hidrocefalia es una entidad nosológica común que en muchos casos tiene como tratamiento de elección la derivación ventricular hacia cualquier cavidad. Dentro de las complicaciones más frecuentes, tenemos las abdominales con formación de colecciones, así como irrupción a sistema intestinal con posterior migración del mismo con presentación de sintomatología a este nivel. Presentamos el caso de un paciente con nula sintomatología abdominal y migración del catéter distal hacia el recto.

Abstract Hydrocephalus is a common nosological entity, with ventricular shunting towards any cavity as the treatment of choice in many cases. Among the most frequent complications, we have the abdominal ones with the formation of collections, as well as irruption to the intestinal system with subsequent migration of the same with presentation of symptoms at this level. We present the case of a patient with no abdominal symptoms and migration of the distal catheter towards the rectum.

Panorámica de la COVID-19 en tres municipios de Guerrero, México, durante 2020 / Overview of COVID-19 in three municipalities of Guerrero, México during 2020

RESUMEN Objetivo Estimar la magnitud de daños a la salud por la pandemia de COVID-19 y su dinámica en Ometepec, Xochistlahuaca y Tlacoachistlahuaca, en Guerrero, México, durante 2020. Métodos Estudio retrospectivo hecho mediante un análisis secundario de la base de datos de COVID-19 de la Secretaría de Salud de México. Con análisis bivariado y regresión logística binaria, se desarrollaron estimaciones de series de tiempo y de magnitud del daño a la salud por COVID-19. Resultados Durante las semanas epidemiológicas 12 a 40 de 2020, se confirmaron 325 casos y 28 defunciones por COVID-19. De los casos confirmados, solo 16 % fueron indígenas. Dos de cada tres defunciones ocurrieron en las primeras 48 horas del ingreso hospitalario. Las variables predictoras que mejor se ajustaron al modelo de regresión, asociadas a la letalidad hospitalaria, fueron diabetes, neumonía asociada a COVID-19 y edad de 50 años o mayor. Conclusiones Es importante enfatizar los datos de alarma de la COVID-19 a la población indígena (en particular, la dificultad respiratoria) y factores asociados a complicaciones por COVID-19 como diabetes y edad avanzada, para incrementar el uso oportuno de los servicios de salud.

ABSTRACT Objective To estimate the magnitude and dynamics of health outcomes related to the COVID-19 pandemic and the dynamic in Ometepec, Xochistlahuaca and Tlacoachist-lahuaca in Guerrero, Mexico. Methods Retrospective study developed from the secondary analysis of the COVID-19 database, from the Mexican Ministry of Health in 2020. We developed time series and estimated the magnitude of the health effects of the pandemic by means of bivariate analysis and binary logistic regression models. Results The public health services registered 325 confirmed cases and 28 deaths from COVID-19 during epidemiologic weeks 12 to 40 in 2020. Nearly 16% of confirmed cases pertained to patients self-reported as indigenous people. Two out of three deaths occurred within 48 hours of hospital admission. Diabetes, COVID-19 pneumonia and being age 50 years or older were the predictor variables associated with hospital fatality which best fit our regression models. Conclusions It is essential to promote a greater use of government health services among indigenous populations by disseminating culturally relevant information on war-ning signs such as difficulty breathing and risk factors such as suffering from diabetes and being an older adult.

Phenolic Composition and Biological Properties of Rhus microphylla and Myrtillocactus geometrizans Fruit Extracts.

Plants from arid zones of Mexico are an interesting source of phytochemicals that exhibit a large number of biological properties. In this context, Rhus microphylla (Rm) and Myrtillocactus geometrizans (Mg) fruits have been used as folk remedies and to make traditional foods, respectively; however, studies on their composition and bioactivity are limited. Thus, the objective of this work was to evaluate the yields, phenolic composition, and bioactive properties (scavenging and reducing capacities, antiproliferative, and antifungal) of aqueous and hydroalcohol extracts of Rm and Mg fruits obtained by conventional agitation and ohmic heating (OH). The results showed that the Rm fruit extracts had the highest total phenolic content (TPC) values and the strongest scavenging and reducing capacities compared to those of Mg fruits, being characterized by the presence of gallic acid, while the composition of the Mg extracts varied with respect to the extraction conditions used. Regarding antifungal activity in vitro against two phytopathogenic fungi, Rhizopus stolonifer and Fusarium oxysporum, the hydroalcohol extracts obtained by conventional agitation of both plants (RmH-C and MgH-C) showed the best inhibitory effect, respectively. Interestingly, none of the extracts under study presented cytotoxicity against the noncancerous ARPE-19 cell line, while three extracts of Rm fruit exhibited a moderate antiproliferative activity against HeLa (cancerous) cell line. These findings reveal for the first time the potential of Rm and Mg fruits as a new source of bioactive compounds for future industrial applications.

Distribución regional de mortalidad COVID-19 en Perú / Regional Distribution Of COVID-19 Mortality In Peru

Objetivos: Comparar la tasa de mortalidad por COVID-19 a nivel nacional por regiones y departamentos desde marzo a septiembre del 2020. Métodos: Estudio cuantitativo, observacional, transversal, ecológico y retrospectivo. La data fue extraída del Sistema Nacional de Defunciones (SINADEF) en Microsoft Excel 2016 y se importó a Stata. Se obtuvo la mortalidad dividiendo el total de muertes sobre la población total de acuerdo al último censo. Se utilizó frecuencias y porcentajes, se realizó un análisis exploratorio ajustado con métodos de regresión robusta para evaluar la asociación entre mortalidad por departamento y regiones ajustado a edad y sexo. Se consideró significativo p< 0.05. Resultados: Se reportaron 32535 fallecidos, el 69.84% fueron varones y la mediana de edad fue 67. La mortalidad por mil habitantes, en la región Costa se calculó en 145 muertes (n=24276), seguido de Sierra con 51 (n=4434) y Selva con 63 (n=2545). Existieron diferencias significativas de mortalidad de acuerdo a la región, en la comparación de la costa con la sierra se halló un coeficiente beta de -96.28 (p <0.001 IC -123.76 -68.77), mientras que en la comparación con la selva se determinó un coeficiente de -50.38 (p 0.01 IC 95% -91.47 -9.29). No se encontró asociación significativa entre la mortalidad y la edad o el sexo de los fallecidos por departamento. Conclusión: La tasa de mortalidad por COVID-19 en Perú fue de 101 por 100000 habitantes, fue mayor en la costa que en la sierra y la selva independientemente de la proporción de varones, mujeres o la edad.

Objectives: Compare the death rate from COVID-19 at the national level by regions and departments from March to September 2020. Methods: Quantitative, observational, cross-sectional, ecological and retrospective study. The data was extracted from the National Death System (SINADEF) in Microsoft Excel 2016 and imported into Stata. The variables were described as frequencies and percentages. Mortality was obtained by dividing the total deaths over the total population according to the last census. An adjusted exploratory analysis was performed using robust regression methods to evaluate the association between mortality by department and regions adjusted for age and sex of the deceased. P <0.05 was considered significant. Results: 32535 deaths were reported, 69.84% were male and the median was 67. The mortality rate in the Costa region 145 deaths were calculated (n = 24,276), followed by Sierra with 51 (n = 4434) and Selva with 63 (n = 2545). There were significant differences in mortality according to the region, in the comparison of the coast with the Sierra region a beta coefficient of -96.28 was found (p <0.001 IC -123.76 -68.77), while in the comparison with the Selva it was determined a coefficient of -50.38 (p 0.01 95% CI -91.47 -9.29). No significant association was found between the mortality rate and the average age or sex of the deceased by department. Conclusion: The death rate from COVID-19 at the national level was 101 per 100 000 inhabitants. The mortality rate found was higher on the Costa region than in the Sierra and Selva, regardless of the proportion of men, women or age.