RESUMO

The performance and validity of the COVISTIXTM rapid antigen test for the detection of SARS-CoV-2 were evaluated in an unselected population. Additionally, we assessed the influence of the Omicron SARS-CoV-2 variant in the performance of this antigen rapid test. Swab samples were collected at two point-of-care facilities in Mexico City from individuals that were probable COVID-19 cases, as they were either symptomatic or asymptomatic persons at risk of infection due to close contact with SARS-CoV-2 positive cases. Detection of the Omicron SARS-CoV-2 variant was performed in 91 positive cases by Illumina sequencing. Specificity and sensitivity of the COVISTIXTM rapid antigen test was 96% (CI 95% 94-98) and 81% (CI 95% 76-85), respectively. The accuracy parameters were not affected in samples collected after 7 days of symptom onset, and it was possible to detect almost 65% of samples with a Ct-value between 30 and 34. The COVISTIXTM antigen rapid test is highly sensitive (93%; CI 95% 88-98) and specific (98%; CI 95% 97-99) for detecting Omicron SARS-CoV-2 variant carriers. The COVISTIXTM rapid antigen test is adequate for examining asymptomatic and symptomatic individuals, including those who have passed the peak of viral shedding, as well as carriers of the highly prevalent Omicron SARS-CoV-2 variant.

RESUMO

RESUMEN: La angiogénesis es el proceso de formación de vasos sanguíneos a partir de otros formados previamente. Existen varios factores que están involucrados en el proceso, así como agentes capaces de modular distintas etapas de esta. Si bien, se ha observado que Celecoxib es capaz de inhibir la angiogénesis en distintos modelos, aún no se ha observado la potencial capacidad antiangiogénica de este agente cuando es microencapsulado en PLGA. Se incubaron huevos fertilizados y a las 48 horas se dividieron en 4 grupos para ser instilados con PBS (control), PLGA, Celecoxib 1000 ppm o Celecoxib 1000 ppm + PLGA. Se realizó un conteo de los vasos sanguíneos a las 48, 72 y 96 horas post aplicación de la solución a estudiar. Los resultados muestran que tanto Celecoxib como Celecoxib+PLGA reducen los vasos sanguíneos, manteniendo el mismo efecto a las 48, 72 y 96 horas y no existen diferencias significativas entre los dos tratamientos. Esto podría ser explicado por la concentración de Celecoxib usada o el margen de tiempo analizado, pudiendo encontrarse diferencias posteriores a este rango de tiempo o con concentraciones distintas.

SUMMARY: Angiogenesis is the process of blood vessel formation from previously formed ones. There are several factors involved in the process, as well as agents capable of modulating different stages of it. Although, it has been observed that Celecoxib is capable of inhibiting angiogenesis in different models, the potential antiangiogenic capacity of this agent has not yet been observed when it is microencapsulated in PLGA. Fertilized eggs were incubated and at 48 hours they were divided into 4 groups to be instilled with PBS (control), PLGA, Celecoxib 1000ppm or Celecoxib 1000 ppm + PLGA. A blood vessel count was performed at 48, 72 and 96 hours after application of the solution to be studied. The results show that both Celecoxib and Celecoxib + PLGA reduce blood vessels, maintaining the same effect at 48, 72 and 96 hours and there are no significant differences between the two treatments. This could be explained by the concentration of Celecoxib used or the time frame analyzed, being able to find differences after this time range or with different concentrations.

Assuntos

RESUMO

Objetivo. Determinar la utilidad de la prueba electromiográfica conocida como 'límite de disfagia' en una cohorte de individuos con trastorno de deglución. Materiales y métodos. Se evaluaron 32 individuos sanos y 32 individuos con trastorno de deglución detectado mediante el cuestionario autosuministrado EAT-10 (Eating Assessment Tool-10), versión traducida y validada al español para Colombia. A todos los individuos se les aplicó la prueba límite de disfagia como método cuantitativo y no invasivo para evaluar la deglución mediante electromiografía de superficie con electrodos ubicados en el músculo submentalis y en el espacio cricotiroideo, utilizando un equipo de dos canales Cadwell Summit Sierra®. Se suministró agua cuyo volumen aumentó gradualmente: 5, 10, 15, 20 y 25 ml. Todos los sujetos fueron instruidos para deglutir el volumen total suministrado en un solo trago. Se determinó el número de pasos o bursts que requirió el individuo para ingerir todo el volumen de líquido. Los resultados de la prueba límite de disfagia se compararon entre los grupos. Se estableció correlación entre el EAT-10 y la prueba límite de disfagia. Se calculó la exactitud diagnóstica de la prueba límite de disfagia en cuanto sensibilidad, especificidad, valores predictivos, proporción de falsos positivos y fasos negativos. Resultados. Se encontró una buena exactitud diagnóstica de la prueba límite de disfagia para detectar trastorno de deglución. Se constató una correlación significativa entre el puntaje de la escala EAT-10 y el resultado de la prueba electrofisiológica límite de disfagia. Conclusión. Este estudio muestra que la prueba límite de disfagia tiene un buen rendimiento diagnóstico para detectar trastorno de deglución

Objective. To determine the usefulness of the electromyographic test known as the 'dysphagia borderline' in a cohort of individuals with swallowing disorder. Materials and methods. Thirty-two healthy individuals and 32 individuals with swallowing disorder detected by means of the self-supplied questionnaire EAT-10 (Eating Assessment Tool-10), a version translated and validated in Spanish for Colombia, were evaluated. All individuals underwent the dysphagia borderline test as a quantitative and non-invasive method to evaluate swallowing by means of surface electromyography with electrodes located in the submentalis muscle and in the cricothyroid space, using a two-channel Cadwell Summit Sierra® equipment. Water was supplied with gradually increasing volume: 5, 10, 15, 15, 20 and 25 ml. All subjects were instructed to swallow the total volume supplied in one gulp. The number of steps or bursts required by the individual to swallow the entire volume of liquid was determined. The results of the borderline dysphagia test were compared between groups. Correlations were established between the EAT-10 and the borderline dysphagia test. The diagnostic accuracy of the borderline dysphagia test was calculated in terms of sensitivity, specificity, predictive values, false-positive and false-negative rates. Results. A good diagnostic accuracy of the borderline dysphagia test for detecting swallowing disorder was found. A significant correlation was found between the EAT-10 scale score and the result of the electrophysiological borderline dysphagia test. Conclusion. This study shows that the borderline dysphagia test has a good diagnostic performance to detect swallowing disorder.

Assuntos

RESUMO

OBJETIVO: El objetivo principal de este estudio fue determinar la incidencia de complicaciones post cirugía bucal. METODOLOGÍA: Se desarrolló un estudio observacional, descriptivo, con el uso del registro prospectivo de la totalidad de pacientes ingresados para cirugía bucal del Complejo Hospitalario San Borja-Arriarán durante doce meses de observación (abril 2017 a marzo 2018). RESULTADOS: La muestra estuvo conformada por 532 pacientes sometidos a procedimientos quirúrgicos de cirugía bucal y 29 casos de complicación postquirúrgica. La incidencia de complicaciones alcanzó un 5,5% y se observó de manera predominante en intervenciones de tipo exodoncia. La complicación mayormente observada fue la alveolitis alcanzando un 2,5% de las cirugías de terceros molares y un 3,7% de las exodoncias de otros dientes. Las hemorragias postoperatorias se observaron en un 1,1% de las cirugías de terceros molares. Otras complicaciones postquirúrgicas fueron abscesos de espacios faciales, parestesia del nervio alveolar inferior, hematomas, equimosis y periostitis. CONCLUSIÓN: Los resultados fueron similares a los reportados en la literatura tanto en su frecuencia como en el tipo de complicación.

OBJECTIVE: The main objective of this investigation was to determine the incidence of postoperative complications in oral surgery. MATERIALS AND METHODS: An observational and descriptive study was developed with the use of the prospective registry of the patients admitted for oral surgery in the San Borja Arriarán Hospital Complex for a twelve-month period of observation (April 2017 to March 2018). RESULTS: The sample consisted of 532 patients undergoing surgical procedures of oral surgery and 29 cases of postoperative complications. The incidence of complications reached 5,5% and it was observed predominantly in interventions of tooth extraction. The most commonly observed complication was dry socket, reaching 2,5% of third molar surgeries and 3,7% of extractions of other teeth. Postoperative hemorrhages were observed in 1,1% of third molar surgeries. Other postoperative complications were facial spaces abscesses, paresthesia of the inferior alveolar nerve, bruising, ecchymosis and periostitis. CONCLUSIONS: The results were similar to those reported in the literature both in their frequency and in the type of complication.

Assuntos

RESUMO

BACKGROUND: The co-occurrence of caries and periodontitis and a possible association is still a matter of debate. Thus, the aim of the study was to determine the co-occurrence of caries and periodontitis in Chilean adults. METHODS: Evaluation of periodontal and dental status in 994 adults (35-44 years old) based on the First Chilean National Examination Survey 2007-2008. The prevalence of caries was defined as the percentage of participants with one or more teeth with untreated caries by using the D component of the DMFT index (DT ≠ 0). The prevalence of periodontitis was determined using standard case definitions for population-based surveillance of periodontitis described by the CDC-AAP. RESULTS: Individuals with caries had an approximately 40% higher prevalence of severe (29.3% vs 20.8%, p < 0.05) and a 13% higher prevalence of total periodontitis (89.3% vs 78.4%, p < 0.05) than those without caries. Ordinal logistic regression revealed a positive association between periodontitis and the number of teeth with caries (DT ≠ 0; 3 or 4 teeth with caries: OR 1.74; CI = 1.12-2.29 p < 0.05; 5 or more teeth with caries: OR 2.47; CI = 1.66-3.67 p < 0.01). CONCLUSION: Dental caries is associated with the severity and prevalence of periodontitis in Chilean adults. Individuals with 3 or more teeth with untreated caries are more likely to suffer from periodontal disease.

Assuntos

RESUMO

Silk sericin is a globular protein whose resistance against fouling is important for applications in biomaterials and water-purification membranes. Here it is shown how sericin generates a water-exclusion zone that may facilitate antifouling behavior. Negatively charged microspheres were used to mimic the surface charge and hydrophobic domains in bacteria. Immersed in water, regenerated silk sericin formed a 100-µm-sized exclusion zone (for micron-size foulants), along with a proton gradient with a decrease of >2 pH-units. Thus, when in contact with sericin, water molecules near the surface restructure to form a physical exclusionary barrier that might prevent biofouling. The decreased pH turns the aqueous medium unviable for neutrophilic bacteria. Therefore, resistance to biofouling seems explainable, among other factors, on the basis of water-exclusionary phenomena. Furthermore, sericin may play a role in triggering the fibroin assembly process by lowering the pH to the required value.

Assuntos

Assuntos

Assuntos

Assuntos