La mujer cubana en el levantamiento de pesas: una perspectiva metodológica

Uno de los deportes que más versatilidad representa es el levantamiento de pesas, pues su práctica no solo se reduce al deporte competitivo, sino es una actividad física que desarrolla la capacidad de fuerza, en el resto de los deportes. Esto constituye una realidad que se concreta en el rendimiento deportivo, sin embargo, las féminas que lo practican no cuentan con un tratamiento ajustado a su género, por lo que el objetivo de este trabajo consistió en determinar qué nivel de conocimientos poseen los entrenadores de levantamiento de pesas en Santiago de Cuba, para distribuir las cargas en el equipo femenino de este deporte. Para lograr este propósito, se implementaron métodos del nivel empírico como la observación científica aplicada a las +sesiones de entrenamiento y la encuesta a los entrenadores que atienden a estas atletas. Como resultado del diagnóstico, se declaró que existe un significativo desconocimiento sobre cómo distribuir las cargas en estas pesistas y se carece de una metodología para incrementar este conocimiento y mejorar los resultados competitivos del género femenino, en esta categoría.

Um dos esportes mais versáteis é o levantamento de peso, pois sua prática não se limita apenas ao esporte competitivo, mas é uma atividade física que desenvolve a capacidade de força em outros esportes. Essa é uma realidade que se reflete no desempenho esportivo, no entanto, as mulheres que o praticam não têm um tratamento ajustado ao seu gênero, por isso o objetivo deste estudo foi determinar qual o nível de conhecimento que os treinadores de halterofilismo em Santiago de Cuba têm para distribuir as cargas na equipe feminina desse esporte. Para atingir esse objetivo, foram utilizados métodos empíricos, como a observação científica aplicada às sessões de treinamento e uma pesquisa com os técnicos que treinam essas atletas. Como resultado do diagnóstico, constatou-se que há uma significativa falta de conhecimento sobre como distribuir as cargas nessas levantadoras de peso e que falta uma metodologia para aumentar esse conhecimento e melhorar os resultados competitivos do gênero feminino nessa categoria.

One of the sports that represents the most versatility is weightlifting, since its practice is not only reduced to competitive sports, but is a physical activity that develops strength capacity in the rest of the sports. This constitutes a reality that is reflected in sports performance, however, the women who practice it do not have treatment adjusted to their gender, so the objective of this work was to determine what level of knowledge lifting coaches have of weights in Santiago de Cuba, to distribute the loads in the women's team of this sport. To achieve this purpose, empirical level methods were implemented such as scientific observation applied to training sessions and surveys of coaches who care for these athletes. As a result of the diagnosis, it was declared that there is a significant lack of knowledge about how to distribute the loads in these weightlifters and there is a lack of a methodology to increase this knowledge and improve the competitive results of the female gender, in this category.

Salud mental en cuidadores de pacientes pediátricos con enfermedades crónicas en República Dominicana / Caregivers' mental health of pediatric patients with chronic health diseases in the Dominican Republic

Introducción: La enfermedad crónica infantil se refiere a condiciones en pacientes pediátricos que generalmente son de duración prolongada, no se resuelven por sí solas, y están asociadas con deficiencia o discapacidad. Esta condición usualmente afecta las actividades normales del niño y requiere hospitalizaciones frecuentes, atención médica domiciliaria y/o atención médica extensa, lo que suele afectar además de quien lo padece a sus cuidadores, quienes con frecuencia presentan características asociadas a estrés y agotamiento llegando a provocar enfermedades físicas y mentales como parte del "síndrome de sobrecarga del cuidador". Metodología: Se realizó una encuesta a cuidadores de pacientes pediátricos del Hospital Pediátrico Doctor Hugo Mendoza, el instrumento de recolección incluye 9 ítems que evalúa la presencia y gravedad de síntomas depresivos en las últimas 2 semanas previas a la entrevista, y los datos fueron analizados en el Programa estadístico SPSS. El estudio contó con la aprobación del comité de ética institucional del Hospital y los participantes otorgaron su consentimiento voluntario explícito antes de la recopilación de datos. Resultados: Al aplicar la clasificación de la escala del BAI, se evidencia que, del total de cuidadores encuestados, el 76.7% parecía sufrir de ansiedad muy baja, un 20.9% de ansiedad moderada y 2.3% de ansiedad severa. Se aplicó la la escala PHQ9, una escala que mide la presencia de síntomas depresivos y mostró que el 41.9 % presenta un nivel leve, 39.5% un nivel mínimo, 16.3% un nivel moderado y por último solo 2.3% un nivel moderado-grave de síntomas depresivos. Discusión: En nuestro estudio hubo igual distribución de hombres y de mujeres. Conclusión: El diagnóstico infantil no juega un papel determinante en la aparición de la ansiedad y la depresión.

Introduction: Chronic childhood disease refers to conditions in pediatric patients that are generally of prolonged duration, do not resolve on their own, and are associated with deficiency or disability. This condition normally affects the normal activities of the child and requires frequent hospitalizations, home health care and/or extensive medical care, which will affect, in addition to those who will usually suffer from it, their caregivers, who often have characteristics associated with stress and exhaustion, reaching causing physical and mental illness as part of "caregiver overload syndrome". Methodology: A survey was conducted on caregivers of pediatric patients at the Doctor Hugo Mendoza Pediatric Hospital, the collection instrument includes 9 items that assess the presence and severity of depressive symptoms in the last 2 weeks prior to the interview, and the data were analyzed in the statistical program SPSS. The study was approved by the institutional ethics committee of the Hospital and the participants gave their explicit voluntary consent before data collection. Results: When applying the classification of the BAI scale, it is evident that, of the total number of caregivers surveyed, 76.7% seemed to suffer from very low anxiety, 20.9% from moderate anxiety and 2.3% from severe anxiety. The PHQ9 scale was applied, a scale that measures the presence of depressive symptoms and showed that 41.9% present a mild level, 39.5% a minimum level, 16.3% a moderate level and finally only 2.3% a moderate-severe level of depressive symptoms. Discussion: In our study there was equal distribution of men and women. Conclusion: Childhood diagnosis does not play a determining role in the appearance of anxiety and depression.

Vocal Demand Response to the Educational Setting Based Communication Scenarios: A Single Subject Study

Objectives: This was a single-subject study, aimed to demonstrate different vocal demand situations that are typical for primary school and teacher's vocal demand response under two acoustical conditions, with and without voice amplification, during five working days. Methods: The long-term voice dosimetry with Vocal Holter Med (PR.O. Voice Srl) was carried out on a 49-year-old female teacher with voice disorders during daily teaching activities. A sound field amplification system (SFAS) PentaClass Runa was installed in the classroom. Voice dosimetry was provided under two different acoustical conditions: without SFAS (2 days) and with SFAS (3 days). Results: Phonation time percentage, sound pressure level (SPL), SPL SD, fundamental frequency (F0), F0 SD, cycle, and distance doses were investigated in seven communication scenarios (lessons, group/individual classes, sports lessons in the gym and schoolyard, breaks, lunch breaks, and other activities). The median scores of all voice parameters differed significantly between different vocal demand contexts. The significant statistical difference in the vocal demand response was in the communication situations with and without SFAS. In addition, the number of children, reverberation time, and ambient air relative humidity impacted voice SPL and the cycle dose. Conclusions: Lessons, sports lessons held in the gym or schoolyard, breaks, and lunch breaks were considered as high vocal demand communication situations requiring higher voice intensity and fundamental frequency, higher phonation time percentage, cycle, and distance doses. Group/individual work and other teacher activities during the day, unrelated to direct work with students, were categorized as low vocal demand communication scenarios.

Objetivos: Este fue un estudio de sujeto único, cuyo objetivo fue demostrar diferentes situaciones de demanda vocal típicas de la escuela primaria y la respuesta vocal de los docentes bajo dos condiciones acústicas, con y sin amplificación de voz, durante cinco días laborables. Métodos: Se llevó a cabo dosimetría vocal a largo plazo con Vocal Holter Med (PR.O. Voice Srl) durante las actividades diarias de enseñanza en una docente de 49 años con trastornos de la voz. Se instaló un sistema de amplificación de campo sonoro (SFAS) PentaClass Runa en el aula. La dosimetría vocal se realizó bajo dos condiciones acústicas diferentes: sin SFAS (2 días) y con SFAS (3 días). Resultados: Se investigaron el porcentaje de tiempo de fonación, el nivel de presión sonora (SPL), SPL SD, la frecuencia fundamental (F0), F0 SD, ciclos y dosis de distancia en siete escenarios de comunicación diferentes (clases, clases grupales/individuales, clases de educación física en el gimnasio y el patio de la escuela, recreos, almuerzos y otras actividades). Las puntuaciones medias de todos los parámetros vocales diferían significativamente entre los diferentes contextos de demanda vocal. La diferencia estadísticamente significativa en la respuesta a la demanda vocal se observó en las situaciones de comunicación con y sin SFAS. Además, el número de niños, el tiempo de reverberación y la humedad relativa del aire ambiente afectaron al SPL de la voz y la dosis de ciclo. Conclusiones: Las lecciones, las clases de educación física en el gimnasio o el patio de la escuela, los recreos y los almuerzos se consideraron situaciones de comunicación de alta demanda vocal, que requerían una mayor intensidad y frecuencia fundamental de la voz, un mayor porcentaje de tiempo de fonación y dosis de ciclo y distancia más altas. El trabajo grupal/individual y otras actividades del profesor durante el día no relacionadas con el trabajo directo con los estudiantes se categorizaron como escenarios de comunicación de baja demanda vocal.

Caracterización clínica de la Nefropatía por Poliomavirus BK en pacientes trasplantados renales / Clinical characterization of Polyomavirus BK nephropathy in kidney transplanted patients

INTRODUCCIÓN. La nefropatía por poliomavirus BK resulta un problema emergente en el trasplante renal, pues contribuye a la pérdida temprana de los injertos renales. OBJETIVO. Caracterizar clínicamente a los pacientes trasplantados renales con nefropatía por poliomavirus BK. MATERIALES Y MÉTODOS. Estudio observacional, descriptivo, realizado en el Hospital de Especialidades Carlos Andrade Marín en el período 2013-2022, se obtuvo una base de datos anonimizada, 479 pacientes trasplantados renales, de estos se identificaron 37 pacientes que corresponde a un 7,7% con nefropatía por poliomavirus BK, se realizó un análisis con el programa estadístico SPSS v26®. RESULTADOS. La población estuvo caracterizada por pacientes del sexo masculino (56,8%), con una edad media de 48,2 años, el donante cadavérico fue el más frecuente (94,5%), la mayor parte del tratamiento de la nefropatía por poliomavirus BK consistió en cambio de micofenolato sódico a everolimus y se mantuvo con 50% de Tacrolimus y Prednisona (40,5%); al valorar el cambio de los valores de creatinina, los niveles más elevados fueros a los 12 meses cuando la pérdida renal fue temprana (p: 0,042), y de la misma manera a los 12 meses, fueron más elevados los niveles de creatinina cuando el diagnóstico histopatológico fue Nefropatía por Poliomavirus Clase 3 (p: 0,01). DISCUSIÓN. La prevalencia de la nefropatía se mantuvo por debajo del 10% reportado a nivel global, la creatinina empeoró en pacientes con pérdida temprana del injerto renal y con una clase patológica avanzada, hecho reportado en la fisiopatología de la enfermedad. CONCLUSIÓN. La pérdida del injerto renal temprano presentó una creatinina más alta que la tardía. Es recomendable un tamizaje adecuado para la detección temprana del virus BK siendo crucial para prevenir el deterioro de la función renal y limitar la posterior pérdida del injerto.

INTRODUCTION: BK polyomavirus nephropathy is emerging as a significant concern in kidney transplantation, as it contributes to the early loss of renal grafts. OBJECTIVE: The aim of this study was to clinically characterize renal transplant recipients with BK polyomavirus nephropathy. MATERIALS AND METHODS: An observational and descriptive study was conducted at Carlos Andrade Marín Specialties Hospital during the period of 2013 to 2022. An anonymized database comprising 479 renal transplant patients was utilized. Among these, 37 patients, constituting 7.7%, were identified with BK polyomavirus nephropathy. Data analysis was performed using the statistical program SPSS v26®. RESULTS: The study population was predominantly composed of male patients (56.8%) with a mean age of 48.2 years. Deceased donors accounted for the majority (94.5%) of cases. The primary approach for managing BK polyomavirus nephropathy involved transitioning from mycophenolate sodium to everolimus, alongside maintaining a regimen of 50% tacrolimus and 40.5% prednisone. When assessing changes in creatinine values, the highest levels were observed at 12 months, coinciding with early renal loss (p: 0.042). Similarly, at the 12-month mark, elevated creatinine levels were associated with a histopathological diagnosis of Polyomavirus nephropathy Class 3 (p: 0.01). DISCUSSION: The prevalence of nephropathy remained below the globally reported threshold of 10%. Creatinine levels worsened in patients experiencing early graft loss and an advanced pathological classification, aligning with established disease pathophysiology. CONCLUSION: Early renal graft loss was associated with higher creatinine levels compared to delayed loss. Adequate screening for early detection of BK virus is recommended, as it plays a crucial role in preventing renal function deterioration and limiting subsequent graft loss.

Tiempo de ciclado y carga viral en pacientes infectados por SARS-CoV-2 en Sonora, México / Cycle threshold and viral load in SARS-CoV-2-infected patients in Sonora, Mexico

Resumen Antecedentes: La infección por SARS-CoV-2 se confirma con la prueba de reacción en cadena de la polimerasa. Su positividad se determina mediante el tiempo de ciclado (Ct, cycle threshold), el cual es inversamente proporcional a la carga viral. Objetivo: Describir las características clínicas y epidemiológicas de pacientes infectados por SARS-CoV-2 de acuerdo con su carga viral estimada mediante Ct. Material y métodos: Estudio transversal que incluyó 21 110 casos confirmados, los cuales fueron estratificados conforme a su carga viral: baja (Ct > 30), media (Ct 25-30) y alta (Ct < 25). Resultado: 53 % de los casos tuvo una carga viral alta, la hospitalización fue más frecuente en sujetos con carga viral media y las defunciones fueron más prevalentes en aquellos con carga viral alta. La mediana del Ct fue más baja durante los primeros cinco días y aumentó linealmente con los días de evolución clínica. Hubo una mayor prevalencia de defunciones, hospitalizaciones y apoyo ventilatorio en sujetos con infección confirmada por SARS-CoV-2 que presentaron carga viral media y alta. Conclusiones: El valor de Ct, correlacionado con otras características del paciente, puede orientar el pronóstico, así como al diseño de intervenciones que limiten la diseminación poblacional del virus.

Abstract Background: SARS-CoV-2 infection is confirmed with the polymerase chain reaction test. Its positivity is determined by the cycle threshold (Ct), which is inversely proportional to viral load. Objective: To describe clinical and epidemiological characteristics of SARS-CoV-2-infected patients according to their viral load estimated by Ct. Material and methods: Cross-sectional study that included 21,110 confirmed cases, which were stratified according to their viral load: low (Ct > 30), medium (Ct 25-30) and high (Ct < 25). Results: High viral load was identified in 53% of the cases, hospitalization was more common in subjects with medium viral load, and deaths were more prevalent in those with high viral load. Median Ct was lower during the first five days and linearly increased with the days of clinical evolution. There was a higher prevalence of deaths, hospitalizations and ventilatory support in subjects with confirmed SARS-CoV-2 infection who had a medium and high viral load. Conclusions: The Ct value, correlated with other patient characteristics, can guide the prognosis, as well as the design of interventions that limit the spread of the virus within the population.

Comparison of SARS-CoV-2 viral load in asymptomatic and symptomatic children attended in a referral public pediatric hospital in Argentina / Comparación de la carga viral de SARS-CoV-2 en niños asintomáticos y sintomáticos atendidos en un hospital pediátrico público de referencia en Argentina

Abstract At present, different reports have shown that children reach similar SARS-CoV-2 viral load (VL) levels compared to adults; however, the impact of VL on children remains ambiguous when asymptomatic versus symptomatic cases are compared. Thus, the aim of this study was to assess VL at the time of diagnosis in asymptomatic and symptomatic SARS-CoV-2 infected children. VL analysis was retrospectively carried out from nasopharyngeal swabs on 82 SARS-CoV-2 infected children, from March to October 2020. Of the 82 children, 31 were asymptomatic. Symptomatic patients had significantly higher VL values compared to asymptomatic ones (median = 7.41 vs4.35 log10 copies/ml, respectively). Notwithstanding, 8 out of 31 asymptomatic children had high VL levels, overlapping levels observed above the first quartile in the symptomatic group. Analysis of different age groups revealed that median VL values were higher in the symptomatic groups, although there was only a significant difference in children younger than 5 years of age. On the other hand, there was no significant difference between the VL values from the 82 SARS-CoV-2 infected children according to age, sex, underlying disease, symptoms or severity of COVID-19 related disease. This study emphasizes the importance of VL analysis in SARS-CoV-2 infected children, who could contribute to viral spread in the community. This concern could be extended to healthcare workers, who are in contact with children.

Resumen Diferentes informes han demostrado que los ninos alcanzan niveles de carga viral (CV) de SARS-CoV-2 similares a los de los adultos, pero el impacto de la CV en los niños continua siendo incierto cuando se compara entre aquellos que son asintomáticos y sintomáticos. El objetivo de este estudio fue evaluar la CV al momento del diagnóstico en ninos asintomáticos y sintomáticos infectados por SARS-CoV-2. El análisis de CV se realizó retrospectivamente a partir de muestras de hisopados nasofaríngeos de 82 niños infectados por SARS-CoV-2 entre marzo y octubre de 2020. De ellos, 31 eran asintomáticos. Encontramos que el grupo sintomático tenía valores de CV significativamente más altos en comparación con el grupo asintomático (mediana = 7,41 vs. 4,35 log10 copias/ml, respectivamente). No obstante, 8 de los 31 ninos asintomáticos presentaron valores de CV elevados, equivalentes a los observados por encima del primer cuartil del grupo sintomático. El análisis por grupos de edad reveló que la mediana de CV fue más alta en los niños sintomáticos, aunque esta diferencia fue significativa solamente en los menores de 5 anos. A su vez, los valores de CV obtenidos a partir de los 82 niños infectados por SARS-CoV-2 no mostraron diferencias significativas según el grupo etario, el sexo, la enfermedad de base, los síntomas y la gravedad de la COVID-19. Este estudio enfatiza la necesidad del análisis de la CV en ninos infectados por SARS-CoV-2, quienes podrían contribuir a la propagación del virus en la comunidad. Esta preocupación podría extenderse a los trabajadores de la salud que están en contacto con los ninños.

Evaluación del valor de acidez Dornic de la leche humana según el tiempo de conservación en freezer y el lugar de extracción / Assessment of Dornic acidity in breast milk based on storage time in the freezer and place of expression

Introducción. El grado de acidez Dornic (AD), medida indirecta del grado de contaminación de la leche humana cruda (LHC), proporciona información sobre la calidad de esta. Recién extraída, el valor oscila entre 1,0° y 4,0° (óptimo). Descalifica el consumo si es >8,0 °D. Se evaluó la correlación de la AD de la LHC de donantes internas (DI) y externas (DE) según el tiempo de conservación hasta la pasteurización, y se determinó la prevalencia de AD ≤4 ºD. Población y método. Estudio retrospectivo analítico. Resultados. Sobre 13 203 muestras, la AD a partir del día 14 de conservación fue menor en las donantes internas, de 2,92; (IC95% 2,69-3,15) versus 4,01 (IC95%: 3,94-4,08); p <0,001] con mayor proporción de AD ≤4 ºD (88 % en DI versus 76 % en DE); OR: 2,30 (IC95%: 1,25-4,24); p = 0,003. Coeficiente de correlación para las DI: R 2 :0; p = 1). Conclusión. La AD a partir del día 14 fue menor en DI, presentando mayor prevalencia de AD ≤ 4ºD. No existió correlación entre el tiempo de conservación y la AD en las DI.

Introduction. The degree of Dornic acidity (DA) is an indirect measure of milk contamination and quality. In freshly expressed milk, DA ranges between 1.0 and 4.0 (optimal). If DA is > 8.0 °D, it should be discarded. The correlation between DA in raw breast milk from internal donors (ID) and external donors (ED) based on storage time until pasteurization was assessed. Population and method. Retrospective, analytical study. Results. In 13 203 samples, DA was lower in IDs as of 14 days of storage: 2.92 (95% CI: 2.69­3.15) versus 4.01 (95% CI: 3.94­4.08), with a higher proportion of DA ≤ 4 °D (88% in IDs versus 76% in EDs); odds ratio: 2.30 (95% CI: 1.25­4.24). Conclusion. DA as of 14 days of storage was lower in IDs, with a higher prevalence of DA ≤ 4 °D. No correlation was observed between storage time and DA in ID samples.

Impact Of Integrated Yoga Practice on Immune Parameters and Quality of Life of Adult People Living With HIV: Protocol for A Randomized Open-Label Trial in Chittoor, India

Background: Yoga therapy can be a promising adjunct to antiretroviral therapy. However, evidence on the ef-fectiveness of Yoga therapy is scanty. The proposed trial will estimate the effect of integrated yoga practice for six months on immune parameters (CD4 (cluster of differentiation 4), viral load) among adult people living with HIV (PLWH) and its cost-effectiveness from the healthcare system’s perspective. Methods: In this randomized open-label parallel-group trial, 110 PLWH in stage 2 HIV, between 18 and 49 years in the intervention arm and 220 PLWH in the same stage will be recruited by block randomization. Inte-grated yoga practice will be given for six months in the intervention arm, and health education on yoga prac-tice in the control arm, besides antiretroviral therapy. After six months, the difference in immune parameters, cardio-metabolic indicators and quality of life (QOL) will be assessed. Besides, an economic evaluation will be done with sensitivity analysis. If found useful, the intervention can be tested at large scale for further confir-mation of the outcomes. Irrespective of the study's outcome, the results will be disseminated through peer-reviewed journals.

A Mouthwash with Cetylpyridinium Chlorideis reducing salivary SARS-CoV-2 viral load in +COVID-19 / Un enjuague con Cloruro de Cetilpiridinio redujo la carga salival del virus SARSCoV-2 en pacientes con Covid-19

Aim: The aim of this randomised, double-blind, placebo-controlled pilot clinical trial is to evaluate the capacity of a mouthwash to reduce SARS-CoV-2 viral load in the saliva of patients with COVID-19. Methods: Twenty-three symptomatic SARS-CoV-2-positive outpatients were selected andrandomised into two groups and registered at NTC 04563689. Both groups rinsed and gargled for one minute with either distilled water (Placebo) or with 0.05% Cetylpyridinium chloride (CPC) plus 0.12% Chlorhexidine (CHX) mouthwash (PERIOAID Intensive Care). Saliva samples were collected before the use of placebo or mouthwash and after 15 minutes and 1 and 2 hours of either of the above treatment. A saliva sample was also taken five days after regular use of placebo or mouthwash twice daily. The virus was detected by qRT-PCR. Results: A great heterogeneity in the viral load values was observed at baseline in both groups for nasopharyngeal and saliva samples. Most of the patients who used the mouthwash (8/12) had a significant decrease in baseline viral load after 15 min (greater than 99% reduction). This inhibitory effect was maintained for up to two hours in 10 of the 12 patients. At five days, SARS-CoV-2 RNA was detectedin only 1 patient from the mouthwash group and in 5 from the placebo group. Conclusions: This study points out that a CPC mouthwash can reduce the viral load in saliva of COVID-positive patients. This finding may be important in transmission control of SARS-CoV-2. Nevertheless, the clinical relevance of CPC mouthwash-reduction on SARS-CoV-2 shedding in saliva requires further study.

Objetivo: El objetivo de este ensayo clínico piloto aleatorizado, doble ciego y controlado con placebo es evaluar la capacidad de un enjuague bucal para reducir la carga viral del SARS-CoV-2 en la saliva de pacientes con COVID-19. Materiales y métodos:Veintitrés pacientes ambulatorios positivos para SARS-CoV-2 sintomáticos fueron seleccionados y aleatorizados en dos grupos y registrados en el NTC 04563689. Ambos grupos se enjuagaron y hicieron gárgaras durante un minuto con agua destilada (placebo) o con cloruro decetilpiridinio al 0 ,05 % (CPC). ) más enjuague bucal con Clorhexidina (CHX) al 0,12% (PERIOAID Intensive Care). Se recolectaron muestras de saliva antes del uso de placebo o enjuague bucal y después de 15 minutos y 1 y 2 horas de cualquiera de los tratamientos anteriores. También se tomó una muestra de saliva cinco días después del uso regular de placebo o enjuague bucal dos veces al día. El virus fue detectado por qRT-PCR. Resultados:Se demostró una gran heterogeneidad en los valores de carga viral al inicio del estudio en grupos ambos para muestras de nasofaringe y saliva. La mayoría de los pacientes que usaron el enjuague bucal (8/12) tuvieron una disminución significativa en la carga viral inicial después de 15 minutos (reducción superior al 99 %). Este efecto inhibidor se mantuvo hasta dos horas en 10 de los 12 pacientes. A los cinco días, se detectó ARN del SARS-CoV-2 en solo 1 paciente del grupo de enjuague bucal y en 5 del grupo de placebo. Conclusiones:Este señala que un enjuague bucal CPC puedereducir la carga viral en saliva de pacientes COVID positivos. Este hallazgo puede ser importante en el control de la transmisión del SARS-CoV-2. Sin embargo, la relevancia clínica de la reducción del enjuague bucal con CPC en la excreción de SARS-CoV-2 en la saliva requiere más estudios.

Toxoplasma gondii SAG2, SAG3 and GRA6 alleles and single nucleotide polymorphism in congenital infections with known parasite load and clinical outcome

ABSTRACT Amniotic fluid DNA samples were genotyped by multilocus-nested-PCR-RFLP, but only three of 11 markers amplified 113 of 122 (92.6%) samples, resulting in 12 untyped and 101 partial non-archetypal genotypes. The 101 typed samples were subdivided into four groups: G1 with 73 samples (5'and 3' SAG2 allele I + SAG3 allele III + GRA6 allele III), 53 had parasite load ≤ 102 parasites/mL (43 asymptomatic, 10 mild infections), 17 had load > 102 and ≤ 103 (one mild, 13 moderate and three severe), and three had load > 103 parasites/mL (three severe); G2 with 22 samples (5'and 3' SAG2 allele I + SAG3 allele III), all parasite load levels ≤ 102 parasites/mL (18 asymptomatic and four mild); G3 with five samples (5' and 3' SAG2 allele I + SAG3 allele II), parasite load ≤ 102 parasites/mL (three asymptomatic and two mild); G4 with one sample (5' and 3' SAG2 allele II + SAG3 allele II + GRA6 allele I), a parasite load < 102 parasites/mL in an asymptomatic infant. After DNA sequencing, restriction sites confirmed SAG2, SAG3 and GRA6 alleles in 98.7%, 100% and 100% of the cases, respectively, while single nucleotide polymorphisms confirmed 90% of 5'-SAG2 allele I; 98.7% of 3'-SAG2 allele I; 98% of SAG-3 allele III, but only 40% of GRA6 allele III results. For the moment, partial non-archetypal genotypes of parasites did not show any relationship with either parasite load in amniotic fluid samples or clinical outcome of infants at the age of 12 months.

Recuento de linfocitos CD4, carga viral y colonización oral por Candida en personas viviendo con VIH/SIDA

Objetivos: determinar la correlación entre el recuento de CD4, carga viral y la colonización oral por Candida en personas viviendo con VIH/SIDA (PVVS) que reciben terapia antirretroviral (TAR). Métodos: se realizó un estudio transversal correlacional con 35 participantes que recibían tratamiento antirretroviral. Mediante citometría de flujo se determinó el recuento de CD4; la carga viral se determinó mediante RT-PCRq y la confirmación de colonización oral se realizó mediante aislamiento de Candida spp. Resultados: el recuento de CD4 se correlacionó significativamente de manera inversa con la carga viral (rho de Spearman = -0,457, p=0,006; Kendall Tau-b= -0,306, p=0,012) y con la colonización oral por Candida (rho de Spearman = -0,442, p=0,008; Kendall Tau-b= -0,366, p=0,010), no se encontró significancia estadística entre la carga viral y colonización (p>0,05). Conclusiones: En las PVVS que reciben TAR, los recuentos bajos de CD4 se relacionan con mayor colonización oral por Candida, no se encontró asociación de dicha colonización con la carga viral.

Objectives: to determine the correlation between CD4 count, viral load, and oral Candida colonization in people living with HIV/AIDS (PLWHA) receiving antiretroviral therapy (ART). Methods: a correlational cross-sectional study was conducted with 35 participants receiving antiretroviral treatment. Using flow cytometry, the CD4 count was determined; the viral load was determined by RT-PCRq and confirmation of oral colonization was made by isolating Candida spp. Results: CD4 count was significantly inversely correlated with viral load (Spearman's rho = -0.457, p=0.006; Kendall Tau-b= -0.306, p=0.012) and with oral Candida colonization (Spearman's rho = -0.442, p=0.008; Kendall Tau-b= -0.366, p=0,010), no statistical significance was found between viral load and colonization (p>0.05). Conclusions: in PLWHA receiving ART, low CD4 counts are associated with greater oral colonization by Candida; no association of said colonization with viral load was found.

Suppression of HIV in the first 12 months of antiretroviral therapy: a comparative analysis of dolutegravir- and efavirenz-based regimens

ABSTRACT Objective To compare viral suppression in treatment-naïve adults starting antiretroviral therapy with dolutegravir (50mg)- and efavirenz (600mg)-based regimens. Methods We analyzed secondary data from Brazilian health information systems of people living with human immunodeficiency virus who started antiretroviral therapy between 2015 and 2017 in Minas Gerais, Brazil. The outcome was viral suppression, defined as the achievement of the first viral load <50 copies/mL within 12 months after initiating antiretroviral therapy. This outcome was also compared with viral load <1,000 copies/mL and analyzed in two scenarios: intention-to-treat versus per-protocol. Time to viral suppression and adjusted odds ratio accompanied by 95% confidence intervals were estimated. Results Of the 2,599 participants enrolled, 77.5% were men, and the median age was 34 years. In the intention-to-treat analysis, viral suppression was 58.1% for efavirenz and 76.7% for dolutegravir. People living with HIV on dolutegravir-based regimen were more likely to achieve viral suppression (aOR: 2.44; 95%CI: 2.01-2.95) and had a shorter median time to viral suppression (p<0.0001). Antiretroviral therapy initiation within <120 days, baseline CD4⁺T-cells ≥200 cells/mm3, and viral load <100,000 copies/mL had higher odds of viral suppression. According to the per-protocol analysis, viral suppression ≥90% was observed by considering viral load <1,000 copies/mL. Conclusion Our study demonstrated that viral suppression improved after introducing dolutegravir, although the proportion of patients with viral load <50 copies/mL was lower than expected. Improved access to routine viral load examinations and continuous surveillance of the effectiveness of antiretroviral therapy should be considered.

Effects of hepatitis C virus genotypes and viral load on glucose and lipid metabolism after sustained virological response with direct-acting antivirals

SUMMARY OBJECTIVE: The objective of this study, carried out at the university hospital of the Federal University of Rio Grande, was to assess whether the treatment of chronic hepatitis C with direct-acting antivirals and the sustained virological response will affect the metabolic influences of the hepatitis C virus and whether these effects will vary according to genotypes and virus load. METHODS: This is an intervention pre-post study, carried out from March 2018 to December 2019, evaluating 273 hepatitis C virus patients treated with direct-acting antivirals. Inclusion criteria included being monoinfected with hepatitis C virus and achieving sustained virological response . Exclusion criteria included the presence of decompensated cirrhosis or co-infected with hepatitis B virus or human immunodeficiency virus. Genotypes, genotype 1 subtypes, and hepatitis C virus viral load were analyzed. Glucose metabolism was evaluated by the Homeostasis Model Assessment-insulin resistance indices: Homeostasis Model Assessment-β, TyG, and HbA1c, measured at the beginning of treatment and in sustained virological response. Statistical analysis with a T test by paired comparison of the means of the variables in the pretreatment and in the sustained virological response. RESULTS: Homeostasis Model Assessment-insulin resistance analysis: there were no significant differences between pretreatment and sustained virological response. Homeostasis Model Assessment-β analysis: significant increase in genotype 1 patients (p<0.028). TyG index analysis: significant increase in genotype 1b (p<0.017), genotype 3 (p<0.024), and genotype non-1 with low viral load (p<0.039). HbA1c analysis: significant decrease in genotype 3 (p<0.001) and genotype non-1 patients with low viral load (p<0.005). CONCLUSION: We detected significant metabolic influences after sustained virological response: impairment in lipid profile and improvements in the glucose metabolism. We found significant differences in genotype dependence, genotype 1 subtypes, and viral load.

Effects of resistance training on consecutive and non-consecutive days on hormonal, neuromuscular and morphological responses in recreationally trained men / Efeitos do treinamento de força em dias consecutivos e não consecutivos nas respostas hormonal, neuromuscular e morfológica em homens treinados recreacionalmente

abstract The purpose of the present study was to investigate the effect of two recovery periods between consecutive and non-consecutive days in strength training sessions on hormonal, neuromuscular and morphological variables in recreationally trained men. Nineteen young men completed the study and were randomly divided into two groups: 24R, 24-hour recovery group (n = nine) and 72R, 72-hour recovery group (n = ten). The strength training program (RT) lasted six weeks with two serial routines, with a weekly frequency of four times. The saliva sample was collected once a week in the morning to determine salivary testosterone. The 1RM, jump against movement and body composition tests were performed in the pre- and post-training periods. As for salivary testosterone, there was no significant effect with respect to time and between groups. Both groups improved maximal strength in terms of intervention time in the barbell bench press and in the leg press 45º, not differing between groups and body composition showed significant interaction in time to body fat percentage ∆% = -14.6 ± 10.0 (24R) and -17.2 ± 10.9 (72R); p = 0.00, fat mass ∆% = -13, 7 ± 9.2 (24R) and -18.2 ± 13.0 (72R); p = 0.00 and fat-free mass ∆% = 3.5 ± 2.7 (24R) and 2.5 ± 2 .8 (72R), p = 0.00. The recovery periods 24 and 72 hours between sessions induced similar responses in the parameters investigated in recreationally strength-trained men.

resumo O objetivo do presente estudo foi investigar o efeito de dois períodos de recuperação entre dias consecutivos e não consecutivos em sessões de treinamento de força sobre variáveis hormonais, neuromusculares e morfológicas em homens treinados recreacionalmente. Dezenove homens jovens completaram o estudo e foram divididos aleatoriamente em dois grupos: 24R, grupo de recuperação de 24 horas (n = nove) e 72R, grupo de recuperação de 72 horas (n = dez). O programa de treinamento de força (TF) durou seis semanas com duas rotinas seriadas, com frequência semanal de quatro vezes. A amostra de saliva foi coletada uma vez por semana no período da manhã para determinação da testosterona salivar. Os testes de 1RM, salto contra movimento e composição corporal foram realizados nos períodos pré e pós-treinamento. Quanto à testosterona salivar, não houve efeito significativo em relação ao tempo e entre os grupos. Ambos os grupos melhoraram a força máxima em termos de tempo de intervenção no supino reto com barra e no leg press 45º, não diferindo entre os grupos e composição corporal apresentaram interação significativa no tempo para percentual de gordura corporal ∆% = -14,6 ± 10,0 (24R) e -17,2 ± 10,9 (72R); p = 0,00, massa gorda ∆% = -13, 7 ± 9,2 (24R) e -18,2 ± 13,0 (72R); p = 0,00 e massa isenta de gordura ∆% = 3,5 ± 2,7 (24R) e 2,5 ± 2,8 (72R), p = 0,00. Os períodos de recuperação de 24 e 72 horas entre as sessões induziram respostas semelhantes nos parâmetros investigados em homens treinados de força recreacionalmente.

Trajectory and impact factors of cycle threshold values of virus load in respiratory tract in children infected with severe acute respiratory syndrome coronavirus 2 Omicron variants / 中华传染病杂志

Objective:To investigate the clinical characteristics of children infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron variants, and the impact factors of duration of cycle threshold (Ct) values turning to ≥35 detected by nucleotide test.Methods:Children aged 0 to 14 years with clinical symptoms of Omicron variants infection who admitted to designated hospital in Shanghai City (Renji Hospital, South Branch, Shanghai Jiao Tong University School of Medicine) from April 7 to June 2, 2022 were enrolled. The daily nasopharyngeal swab specimens were used for SARS-CoV-2 nucleic acid detecting by polymerase chain reaction and the results were expressed as Ct values. The T Ct≥ x was defined as from the symptom onset or first positive nucleic acid test results (the earlier data) to Ct≥ x of the open reading frame 1ab ( ORF1 ab) gene, which was the time duration from the initial to a specific Ct value.Clinical data were collected, including age, sex, vaccination and comorbidities.Cox model was performed to analyzed the impact factors of T Ct≥35. Results:A total of 871 pediatric cases with a median age of two years (ranging from one month to 14 years old) were included. Among them, 474 cases (54.4%) were male, and 89 cases (10.2%) had underlying diseases including congenital heart disease, solid tumors and epilepsy. There were 572(65.7%) mild cases, 298(34.2%) common cases, one (0.1%) severe case and no critical cases or deaths. The T Ct≥35 was 12(10, 14) days. Cox model indicated that compared to children aged one to 12 months, children aged 37 to 84 months and 85 to 168 months had shorter T Ct≥35 (hazard ratio ( HR)=1.55 and 1.84, respectively, both P<0.001). After adjusted with age, comparing to unvaccinated patients, patients with one or two shots vaccine had shorter T Ct≥35 (adjected hazard ratio (a HR)=1.49, P=0.011), and common patients had longer T Ct≥35 than mild patients (a HR=0.78, P=0.002), and patients with comorbidities had longer T Ct≥35than patients without comorbidities (a HR=0.38, P<0.001).The duration of T Ct≥28, T Ct≥30, T Ct≥33 and T Ct≥35 in children without underlying diseases were 7(6, 9) d, 9(7, 10) d, 10(8, 11) d and 12(10, 14) d, respectively. Conclusions:Age, vaccination, disease severity and underlying diseases could affect the duration of SARS-CoV-2 nucleotide turning to negative (Ct value≥35) in children infected with Omicron variants.

Application of bedside ultrasound in the evaluation of volume responsiveness in patients with septic shock / 中国医师杂志

Objective:To evaluate the value of bedside ultrasound in evaluating volume responsiveness of patients with septic shock.Methods:A total of 102 patients with septic shock admitted to ICU of the First Affiliated Hospital of Hebei North University from April 2018 to February 2021 were selected. Patients were divided into response group and non-response group according to the value of stroke volume increase (ΔSV) after volume loading test (VE), and the hemodynamic parameters before and after VE were compared between the two groups. Pearson correlation was used to analyze the relationship between ΔSV and hemodynamic indexes. Receiver operating characteristic (ROC) curve was drawn to analyze the sensitivity and specificity of each hemodynamic index in evaluating volumetric reactivity in patients with septic shock.Results:Of the 102 patients, 54 responded and 48 did not. Before VE, the distensibility index of inferior vena cava (ΔIVC 1), espiratory variability index of inferior vena cava (ΔIVC 2), respiratory variability of aortic peak velocity (ΔVpeak AO), brachial artery maximum velocity variability (ΔVpeak BA) and respiratory rate of peak flow velocity of femoral artery (ΔVpeak CFA) in response group were higher than those in non-response group (all P<0.05), but there was no statistical significance in heart rate (HR), mean arterial pressure (MAP) and central venous pressure (CVP) between 2 groups (all P>0.05). After VE, the HR, ΔIVC 1, ΔIVC 2, ΔVpeak AO, ΔVpeak BA and ΔVpeak CFA in response group were significantly decreased, while MAP and CVP were significantly increased (all P<0.05). The CVP was significantly decreased in the non-response group ( P<0.05), while other indexes were not significantly changed. Before VE, the ΔIVC 1, ΔIVC 2, ΔVpeak AO, ΔVpeak BA and ΔVpeak CFA were positively correlated with ΔSV ( r=0.589, 0.647, 0.697, 0.621, 0.766; all P<0.05). There was no correlation between CVP and ΔSV ( r=-0.345, P>0.05). Before VE, the area under the curve of ΔIVC 1, ΔIVC 2, ΔVpeak AO, ΔVpeak BA and ΔVpeak CFA were all >0.7, indicating high sensitivity and specificity. Conclusions:Bedside ultrasound monitoring ΔIVC, ΔVpeak AO, ΔVpeak BA and ΔVpeak CFA can better evaluate the volume response of patients with septic shock, and can provide a reference basis for clinical fluid resuscitation treatment.

Correlation between peak viral load and liver function damage in children with infectious mononucleosis induced by Epstein-Barr virus / 中国基层医药

Objective:To investigate the relationship between the peak load of Epstein-Barr virus (EPV) and live function damage in children with infectious mononucleosis caused by EPV.Methods:Eighty children with infectious mononucleosis caused by EPV who received treatment in Pingxiang People's Hospital from January 2018 to December 2021 were included in this study. Five mL of venous blood was taken from each child for detecting the peak load of EBV-DNA and liver function indicators. These children were divided into a low-load group ( n = 25, EBV-DNA load < 10 4 copies/mL), a medium-load group ( n = 34, EBV-DNA load of 10 4-10 5 copies/mL), and a high-load group ( n = 21, EBV-DNA load > 10 5 copies/mL) according to the peak EBV-DNA load. The relationships between different peak loads of EBV-DNA and live function, age, and sex were analyzed. Results:The rate of liver dysfunction in the high-load group [85.71% (18/21)] was significantly higher than [38.24% (13/34)] in the medium-load group and [20.00% (5/25)] in the low-load group ( χ2 = 11.90, 19.71, P = 0.001, P < 0.001). Alanine aminotransferase and aspartate aminotransferase levels in the high-load group were (156.24 ± 13.21) U/L and (171.69 ± 13.49) U/L, respectively, which were significantly higher than (125.89 ± 10.54) U/L and (143.26 ± 10.29) U/L in the medium-load group and (89.64 ± 6.75) U/L and (64.89 ± 5.74) U/L] in the low-load group (all P < 0.001). There was no significant difference in the peak load of EBV-DNA between children of different ages and between children of different sexes (both P > 0.05). Conclusion:Children with infectious mononucleosis caused by EPV have a high EBV-DNA peak load. A higher peak load of EVB-DNA indicates a higher risk of liver function damage. More attention should be paid in clinical practice. Effective diagnosis and treatment should be performed in time to control the patient's condition as early as possible.

Characteristics of HIV-infected persons and their spouses who became HIV-positive in HIV discordant couples in Dehong Prefecture， Yunnan Province / 上海预防医学

ObjectiveTo determine the characteristics， viral load and immunological status of HIV-infected persons and their spouses who became HIV-positive， and the reasons for HIV seroconversion in 55 HIV discordant couples in Dehong Dai and Jingpo Autonomous Prefecture （Dehong Prefecture）， Yunan Province. MethodsData on the 55 couples meeting the criteria of having a previously positive spouse were retrieved from the AIDS Integrated Prevention and Control Data Information System of the China Disease Control and Prevention Information System during 2015-2021. General socio-demographic information， age at diagnosis， exposure history， CD4+T lymphocyte count， and antiviral treatment were collected. Descriptive analysis and chi-square test were used to compare the distribution of pre-HIV-positive spouses and their HIV seroconverted spouses. ResultsA total of 55 spouses from HIV discordant couples had HIV seroconversion. Of them， 72.7% （40/55） of pre-HIV-positive spouses were husbands. The most recent CD4+T lymphocyte count in the pre-HIV-positive spouses was （328.31±246.27） cells·μL-1 at the time of diagnosis of their seroconverted spouses， of which 36.3% （20/55） had a CD4+T lymphocyte count of less than 200 cells·μL-1. Furthermore， of those pre-HIV-positive spouses with low CD4+T lymphocyte count， 45.0% （9/20） had an undetectable viral load， 15.0% （3/20） <400 copies·mL-1， and 25.0%（5/20） ≥400 copies·mL-1. Additionally， 16.4% （9/55） of the pre-HIV-positive spouses did not have a viral load test. The main reasons for HIV seroconversion among HIV-negative spouses in the discordant couples were poor condom use， poor compliance with antiviral therapy， and treatment discontinuation. ConclusionThe follow-up management of HIV discordant couples should be strengthened in Dehong Prefecture， especially the monitoring of viral load levels and immunological status of pre-HIV-positive spouses， to improve their compliance with antiviral therapy and reduce treatment discontinuation， which would effectively prevent and control HIV transmission between spouses.

The application value of GeneXpert MTB/RIF Ultra in the detection of special specimens of tuberculosis / 中国热带医学

@#Abstract: Objective To compare the diagnostic efficacy of the upgraded version of the GeneXpert automated fluorescent quantitative PCR system (GeneXpert MTB/RIF Ultra, GeneXpert Ultra) and the original version of the GeneXpert system (GeneXpert MTB/RIF, Xpert), real-time fluorescent quantitative nucleic acid detection (FQ-PCR), real-time fluorescent thermostatic amplification of Mycobacterium tuberculosis RNA (SAT-RNA), real-time fluorescent thermostatic amplification detection of DNA (thermostatic amplification method) and traditional BACTEC MGIT 960 liquid culture (culture method) for special specimens of tuberculosis, in order to analyze its application value in clinical detection. Methods Using prospective research methods, a total of 170 special specimens (including 47 pleural and ascites effusion samples, and 34 24-hour urinary sediment specimens, 49 tissue specimens and 40 fester specimens) were collected i'an Chest Hospital from January to September 2021. GeneXpert Ultra, Xpert, FQ-PCR, SAT-RNA, isothermal amplification, and traditional culture were used for detection. Clinical diagnosis was used as the standard, and sensitivity, specificity, positive predictive value, negative predictive value, coincidence rate, and Kappa value were compared among the methods. Results The sensitivities of GeneXpert Ultra, Xpert, FQ-PCR, SAT-RNA, isothermal amplification, and traditional culture were 65.18% (73/112), 49.11% (55/112), 37.50% (42/112), 19.64% (22/112), 8.04% (9/112), and 22.32% (25/112), respectively. The sensitivity of GeneXpert Ultra was higher than that of the other five methods, and the differences were statistically significant (χ2=66.25, 42.10, 28.89, 13.09, 4.92, 15.18, all P<0.05). GeneXpert Ultra result analysis showed that: 5.48%(4/73) cases had trace, that is, trace Mycobacterium tuberculosis load, 79.45% (58/73) cases were extremely low, 10.96% (8/73) cases were low, 2.74% (2/73) were medium, , and 1.36% (1/73) were high load. In 4 trace samples, the Xpert detection was negative for all. Of the 73 GeneXpert Ultra positive reports, 63 were rifampicin-sensitive, 6 were rifampicin-resistant, and 4 were rifampicin-resistant but of unclear resistance. Of the 55 Xpert positive reports, 45 were rifampicin-sensitive, 2 were rifampicin-resistant, and 8 were rifampicinresistant but of unclear resistance.. Conclusions The new generation of GeneXpert MTB/RIF Ultra has high sensitivity, specificity and drug resistance detection rate, and its advantage is even more apparent in the pathogenic diagnosis of special specimens of tuberculosis. It can be used as one of the preferred methods in samples with low bacterial load.

Assessment of ergonomic load on the prevalence of work-related musculoskeletal disorders in ICU nurses / 中国职业医学

Objective: To investigate the prevalence of work-related musculoskeletal disorders(WMSDs) among intensive care unit (ICU) nurses, assess its relationship with ergonomic load and overall exposure levels. Methods: A total of 272 ICU nurses from two tertiary hospitals in a city were selected as the research subjects using convenient sampling method. The Chinese Musculoskeletal Disorder Questionnaire was used to investigate the prevalence of WMSDs among the ICU nurses. The Quick Exposure Check (QEC) was used to assess the ergonomic load on the back, shoulder/arm, hand/wrist, and neck during different clinical nursing operations. Results: The annual prevalence of WMSDs was 75.7% among ICU nurses. The annual prevalence of WMSDs in different body parts, from high to low, was as follows： lower back, neck, shoulder/arm, back, knee, hip/leg, hand/wrist, ankle/foot, and elbow (54.8% vs 43.4% vs 40.8% vs 36.0% vs 21.3% vs 19.9% vs 18.8% vs 18.4% vs 8.1%, P<0.01). ICU nurses had the highest QEC scores on the back (dynamic), shoulder/arm, hand/wrist, and neck with assisting patient turning (all P<0.05) among the six clinical nursing items. During the operation of patient turning, patient lifting, patient bathing, and bed sheet changing for bedridden patients, the back (dynamic) and shoulder/arm were at a high load level, while the hand/wrist and neck were at a mild load level. When nurses were providing tracheostomy care and oral care for intubated patients, their back (static), shoulder/arm, hand/wrist, and neck were at a mild load level. The overall exposure rate for assisting patient turning, patient lifting, oral care for intubated patients, bed sheet changing for bedridden patients, patient bathing, and tracheostomy care were 77.8%, 66.5%, 63.6%, 60.2%, 58.5%, and 57.4%, respectively. The risk for assisting patient turning was classified as level four, while the risk for other clinical nursing items was level three. Conclusion: The prevalence of WMSDs in ICU nurses is high. Both ergonomic load level and total exposure rate of back, shoulder/arm, hand/wrist and neck were high during clinical nursing operations.