Due to the emergence of microorganisms resistant to antibiotics and the failure of antibiotic therapies, there is an urgent need to search for new therapeutic options, as well as new molecules with antimicrobial potential. The objective of the present study was to evaluate the in vitro antibacterial activity of Apis mellifera venom collected in the beekeeping areas of the city of Lambayeque in northern Peru against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. Bee venom extraction was performed by electrical impulses and separated using the Amicon ultra centrifugal filter. Subsequently, the fractions were quantified by spectrometric 280 nm and evaluated under denaturant conditions in SDS-PAGE. The fractions were pitted against Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 29213, and Pseudomonas aeruginosa ATCC 27853. A purified fraction (PF) of the venom of A. mellifera and three low molecular weight bands of 7 KDa, 6 KDa, and 5 KDa were identified that showed activity against E. coli with a MIC of 6.88 µg/mL, while for P. aeruginosa and S. aureus, it did not present a MIC. No hemolytic activity at a concentration lower than 15.6 µg/mL and no antioxidant activity. The venom of A. mellifera contains a potential presence of peptides and a predilection of antibacterial activity against E. coli.

Objetivo. Describir el conocimiento sobre medidas de bioseguridad para el manejo de residuos biocontaminados en estudiantes de primer año de Medicina Humana una universidad de Chiclayo, Perú, durante octubre de 2018. Material y métodos. Estudio descriptivo transversal, para lo cual se aplicó un cuestionario estructurado basado en el Protocolo de Bioseguridad de los Laboratorios tipo I. Resultados. Se estudió 185 estudiantes. La población se caracterizó el predominio de las mujeres (78,5%). El 30,2% y  el 82,4 % de estudiantes desconocían la información básica con respecto a los pictogramas de seguridad y la forma correcta de eliminación de residuos, respectivamente. Mientras que el 99,4 % y 95,4 % conocían sobre la indumentaria correcta y el lavado de manos. Los 99,0 % de estudiantes de Morfofisiología II respondieron correctamente el ítem sobre lavado de manos. Conclusiones. Una proporción importante de estudiantes de Medicina de la USAT desconoce los pictogramas de seguridad y la eliminación de residuos sólidos, pero conocen la indumentaria y lavado de manos correctos.

Introduction: The epidemic that had its beginning in the city of Wuhan in December 2019, has become a public health problem that is advancing at dizzying steps. Objective: To determine the clinical and epidemiological profile in Covid-19 patients attended at the Hospital Apoyo I Santiago Apóstol - Utcubamba, 2020. Method: The type of research was observational, descriptive and retrospective cross-sectional. The population consisted of 312 patients from which a sample of 173 patients was extracted that met the conditions of being representative and adequate. All data processing and statistical calculations were performed using Microsoft Excel 2019 software. Results: Regarding the results, it was determined that the epidemiological profile: male gender a total of 102 and female gender 71, representing 59.0% and 41.0% respectively; average age of 45 years; most affected place of origin, the city of Bagua Grande, with a frequency of 162, which represents 93.6%. Regarding the clinical profile: diabetes mellitus presented a total of 7 cases, representing 4.1%; cardiovascular diseases with a frequency of 6, representing 3.5%; general malaise with a total of 75 cases, representing 43.4%; fever with a frequency of 66 cases, representing 38.2%; cough with a frequency of 56 cases, representing 32.4%; headaches with a frequency of 50 cases, representing 28.9%; and dyspnea with a frequency of 34, representing 19.7%. Conclusion: The male gender was predominant with comorbidities such as diabetes mellitus, general malaise and elevated CRP.

Materiales y métodos: Investigación descriptiva, de tipo correlacional. La muestra estuvo conformada por 72 trabajadores, de los cuales 37 eran docentes y 35, administrativos. Se midió espectrofotométricamente el MDA presente en el plasma mediante la reacción con ácido tiobarbitúrico (TBA). Para determinar el estrés se utilizó la Escala de Estrés Laboral, elaborada por Ivancevich y Matteson en 1989, y adaptada por Suárez en 2013. El instrumento consta de 25 ítems y está compuesto por siete dimensiones: clima organizacional, estructura organizacional, territorio organizacional, tecnología, influencia del líder, falta de cohesión y respaldo del grupo. Resultados: En la investigación participaron 23 hombres y 49 mujeres. La edad media fue de 45,1 años y la desviación estándar de 11,33, con un mínimo de 25 y máximo de 68 años. El estrés laboral elevado se observó en mayor porcentaje en las dimensiones influencia del líder (19,40 %), estructura organizacional (16,70 %) y territorio organizacional (16,70 %). El 54 % (39) de los trabajadores presentaron niveles altos del MDA, es decir, valores superiores en plasma a 3,94 µM. De ellos, 17 fueron hombres y 22, mujeres. Al evaluar, con Rho de Spearman al 95 % de significancia, la correlación entre los valores de MDA con el sexo, trabajar en otro centro laboral y la atención de hijos en el hogar, resultaron valores de p = 0,08, p = 0,61 y p = 0,33, respectivamente; por lo tanto, no hubo significancia estadística. Conclusiones: Del total de trabajadores evaluados, el 54 % presentó alta concentración de malondialdehído plasmático. Aunque no hubo correlación estadísticamente significativa, las dimensiones con alto nivel de estrés, según la prueba aplicada, influencia del líder, estructura organizacional y territorio organizacional mostraron niveles de estrés en el orden de 19,40 %, 16,70 % y 16,70 %, respectivamente.

ObjectiveThis study examined the laboratory results of COVID-19 patients from a hospital in the Peruvian Amazon and their clinical prognosis.MethodsAn analytical cross-sectional study was carried out whose purpose was to identify the laboratory tests of patients with COVID-19 and mortality in a hospital in Ucayali, Peru during the period from March 13 to May 9, 2020, selecting a total of 127 with Covid-19. Mean and the standard deviation was described for age, leukocytes, neutrophils, platelets, RDW-SD; median and interquartile range for the variables lymphocyte, RN / L, fibrinogen, CRP, D-dimer, DHL, hematocrit, monocytes, eosinophils.ResultsNo differences were observed in this population regarding death and sex (OR: 1.31; 95% CI 0.92 to 1.87), however, it was observed that, for each one-year increase, the probability of death increased by 4% (PR: 1.04, 95% CI 1.03 to 1.05). The IRR (Incidence Risk Ratio) analysis for the numerical variables showed results strongly associated with hematological values such as Leukocytes (scaled by 2500 units) (IRR: 1.08, 95% CI 1.03 to 1.13), neutrophils (scaled by 2500 units) (IRR: 1.08; 95% CI 1.03 to 1.13), on the contrary, it is observed that the increase of 1000 units in lymphocytes, the probability of dying decreased by 48% (IRR: 0.52; 95% CI 0.38 to 071).ConclusionParameters such as leukocytes and neutrophils were statistically much higher in patients who died.