Persistence of COVID-19 Symptoms after Recovery in Mexican Population

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is responsible for the coronavirus disease (COVID-19), a highly contagious infectious disease that has caused many deaths worldwide. Despite global efforts, it continues to cause great losses, and leaving multiple unknowns that we must resolve in order to face the pandemic more effectively. One of the questions that has arisen recently is what happens, after recovering from COVID-19. For this reason, the objective of this study is to identify the risk of presenting persistent symptoms in recovered from COVID-19. This case-control study was conducted in one state of Mexico. Initially the data were obtained from the participants, through a questionnaire about symptoms that they had at the moment of the interview. Initially were captured the collected data, to make a dataset. After the pre-processed using the R project tool to eliminate outliers or missing data. Obtained finally a total of 219 participants, 141 recovered and 78 controls. It was used confidence level of 90% and a margin of error of 7%. From results it was obtained that all symptoms have an associated risk in those recovered. The relative risk of the selected symptoms in the recovered patients goes from 3 to 22 times, being infinite for the case of dyspnea, due to the fact that there is no control that presents this symptom at the moment of the interview, followed by the nausea and the anosmia with a RR of 8.5. Therefore, public health strategies must be rethought, to treat or rehabilitate, avoiding chronic problems in patients recovered from COVID-19

Forage yield of Urochloa grass cv Camello I and II at different cutting frequencies and intensities

Objective: to evaluate the forage production performance of hybrid grasses of the genus Urochloa at different mowing intervals and intensity. Design/methodology/approach: Camello I (GPB025) and Camello II (GPB07) hybrids were evaluated at different intervals (5 and 7 weeks) and cutting intensities (10 and 20 cm). The study was carried out under temporary conditions, from 2020 to 2021, in a randomized complete block experimental. The variables evaluated were: yield of total dry matter (DMT) and by morphological component, leaf (DMl), stem (DMs) and inflorescence (DMi) and senescent matter (DMsm), plant height, basal cover, specific leaf area and leaf area index (LAI). Results: on average, when harvesting the forage at an interval of 7 weeks and intensity of 20 cm, higher DMT, DMl and DMs (66, 46 and 85 %, respectively) were obtained, than that obtained when harvesting at an interval of 5 weeks and intensities 20 cm. Limitations of study/implications: Agronomic management in pastures is a factor that affects forage yield and meadow persistence. Making cuts at different intervals and intensities in grasses allows generating adequate management strategies to increase yields and the persistence of the meadow. Findings/conclusions: The highest yield of total dry matter in both cultivars, by morphological component, plant height and leaf area index, was obtained when harvesting at an interval of 7 weeks and at a height of 20 cm of residual forag