The rs1477196 SNP of the FTO Gene is Associated with Primary Knee Osteoarthritis in a Female Population from Northern Mexico

ABSTRACT Background: Osteoarthritis is a frequent rheumatic disease. Some single-nucleotide polymorphisms of the gene associated with fat mass and obesity are associated with increased body mass index and knee osteoarthritis. Objective: The objective of this study was to analyze the association of single nucleotide polymorphism rs1477196 of the fat mass and obesity gene with primary knee osteoarthritis. Methods: This observational and cross-sectional study included 347 Mexican participants. We performed the genotypification analysis with TaqMan® probe C_2031262_10 for rs1477196 (Thermo Fisher Scientific). Multivariate analysis included covariables such as age, type 2 diabetes, obesity, and postmenopause. Results: Type 2 diabetes, obesity, and postmenopause were associated with primary knee osteoarthritis in female participants. We did not find an association between rs1477196 and obesity. In the codominant and dominant genetic models, rs1477196 was significantly associated with primary knee osteoarthritis only in the female group, including in the model adjusted by other covariables (odds ratio = 2.517; 1.035-6.123; p = 0.042 and odds ratio = 2.387; 1.054-5.407; p = 0.037, respectively). The interaction between rs1477196 and obesity was significantly associated with primary knee osteoarthritis in female participants (p = 0.039 and p = 0.043). Conclusions: Our findings suggest that the rs1477196 variant of the fat and obesity mass gene may be associated with the risk of primary knee osteoarthritis in women.

Experiences and challenges of enrolled nurses undertaking a Bachelor of Nursing Science programme in Namibia

Background: Globally, enrolled nurses (ENs) are embarking on an educational journey to become registered nurses (RNs) in order to enhance their knowledge and career opportunities. However, their aspiration is not without challenges. In Namibia, the experiences of these nurses have not been extensively researched. Objectives: This study aims to explore and describe the experiences and challenges of ENs undertaking a Bachelor of Nursing Science at the University of Namibia. Method: A qualitative, exploratory, descriptive and contextual research strategy was followed as the basis of conducting the study. A sample of 15 nursing students was purposively selected from the target population of 73 nursing students. This sample size was determined by the saturation of data as reflected in repeating themes. The collected data were analysed thematically using an inductive approach. Results: Three main themes subsequently emerged from the study: ENs' positive experiences advancing in the Bachelor of Nursing Science (BNSc) programme; nurses' negative experiences advancing in the BNSc programme; and recommendations to ensure effective advancement in the BNSc programme Conclusion: The findings of this study revealed that ENs positively experience becoming a RN when it comes to self-development; however, they have negative experiences such as not receiving exemptions for prior learning and having to learn a new curriculum. Contribution: These findings may be used by the Faculty of Health Sciences, School of Nursing and Public Health management in order to develop targeted interventions and ongoing strategies during their curriculum review cycles to ensure positive student experiences and success within the programme.

Experiences of nursing students preparedness to migrate to online learning during COVID-19 lockdown in Namibia

Background: COVID-19 made it mandatory for Namibian education institutions to transition from traditional face-to-face classroom learning to online learning. Minimal time was available to prepare nursing students to adopt this model of learning, which subsequently influenced their learning experiences. Aim: The aim of the study was to explore and describe nursing students' experiences regarding their preparedness to migrate to online learning during the COVID-19 lockdown at a public university in Namibia. Setting: Semi-structured interviews were conducted in English at the public university in Kavango East, Namibia. Methods: A qualitative approach utilising an exploratory and descriptive design was used. Convenience sampling and a semi-structured interview guide was used to assess the experiences of undergraduate nursing students. Data saturation was achieved after 15 interviews. ATLAS.ti 8 software assisted with management of data that was analysed inductively following the six steps of thematic analysis. Results: The following themes emerged from analysis of the data: (1) students' readiness to migrate to online learning; (2) challenges faced by nursing students during the migration to online learning; and (3) strategies to support the transition from face-to-face to online learning. Conclusion: The study's findings show that the student nurses were unprepared for online learning due to lack of skills and the ability to use technology to navigate online learning platforms. Access to online learning was also hampered by poor Internet connectivity and unreliable electronic devices. Contribution: These findings may be used to develop targeted interventions and strategies to mitigate challenges faced during transition from face-to-face to online learning.

Herpetofauna of protected areas in the Caatinga VIII: An updated checklist for the Serra das Confusões region with new data from Serra Vermelha, Piauí, Brazil / Herpetofauna das áreas protegidas da Caatinga VIII: Um inventário atualizado para a região da Serra das Confusões com novos dados da Serra Vermelha, Piauí, Brazil

Abstract It is repeatedly stressed the need to characterize the extant biodiversity in tropical ecosystems. However, inventory studies are still progressing slowly in dry ecosystems, leading to the underestimation of their true biodiversity and hindering conservation efforts. In this study, we present primary and secondary data, along with an updated list of amphibians and reptiles from two localities in the São Francisco-Gurguéia region in Piauí. Additionally, we compare the species composition between nine areas within the Caatinga, which were sampled using standardized methods over the past ten years, to examine broader spatial patterns of community composition. To survey reptiles and amphibians, we employed similar methods and sampling efforts in two areas within the Serra das Confusões National Park (SCNP) region. Our surveys recorded a total of 73 species of amphibians and reptiles, of which 24 are new distribution records for the SCNP region. Consequently, our findings increase the known herpetofauna in the region to 94 species. Despite their proximity, the two sites in the SCNP region exhibited only 42% similarity in species composition, and they differed significantly from other areas within the Caatinga. Furthermore, even the closer Caatinga areas presented differences in species composition, highlighting the necessity to evaluate biodiversity across the landscape and contribute to understanding biogeographic patterns.

Resumo É repetidamente enfatizada a necessidade de caracterizar a biodiversidade vivente em ecossistemas tropicais. No entanto, os estudos de inventário ainda estão progredindo lentamente em ecossistemas secos, levando à subestimação de sua verdadeira biodiversidade e dificultando os esforços de conservação. Neste estudo, apresentamos dados primários e secundários, juntamente com uma lista atualizada de anfíbios e répteis de duas localidades na região de São Francisco-Gurguéia, do Piauí. Além disso, comparamos a composição de espécies entre nove áreas dentro da Caatinga, que foram amostradas usando métodos padronizados nos últimos dez anos, para examinar padrões espaciais mais amplos de composição da comunidade. Para estudar répteis e anfíbios, utilizamos métodos e esforços de amostragem semelhantes em duas áreas na região do Parque Nacional da Serra das Confusões (PNSC). Nossos levantamentos registraram um total de 73 espécies de anfíbios e répteis, das quais 24 são novos registros de distribuição para a região do PNSC. Consequentemente, nossos resultados aumentam a herpetofauna conhecida na região para 94 espécies. Apesar da proximidade, os dois locais na região do PNSC exibiram apenas 42% de similaridade na composição de espécies e diferiram significativamente de outras áreas dentro da Caatinga. Mesmo áreas mais próximas da Caatinga apresentaram diferenças na composição de espécies, destacando a necessidade de avaliar a biodiversidade em toda a paisagem e contribuir para a compreensão de padrões biogeográficos.

Trasplante cardíaco en miocardiopatía chagásica: 23 años de experiencia en un centro de referencia / Heart Transplantation in Chagas Cardiomyopathy: 23-Year Follow-Up in a Referral Center

RESUMEN Introducción: La enfermedad de Chagas afecta aproximadamente a 6 millones de personas en América Latina. El 25 a 35% evoluciona hacia la Miocardiopatía Chagásica (MCh). Una opción terapéutica en sus estadios avanzados es el trasplante cardíaco (TxC). Objetivos: Comparar la supervivencia de pacientes con TxC por MCh frente a otras etiologías. Analizar la incidencia de la reactivación (Ra) de enfermedad de Chagas y su impacto en la supervivencia en este subgrupo de pacientes. Material y métodos: Se evaluaron retrospectivamente pacientes con TxC entre agosto 1998 y marzo 2021. Se analizó la supervivencia mediante curvas de Kaplan-Meier y log rank test. El diagnóstico de Ra se realizó mediante métodos moleculares, prueba de Strout en sangre periférica, tejido miocárdico y/o cutáneo. Resultados: De 606 pacientes con TxC, 39 (6,4%) presentaban MCh. Seguimiento medio 4,4 años (Rango Intercuartilo 1,2-8,6). Edad subgrupo MCh 51 años (RIC 45-60). Hombres 28 (72%). Se documentó Ra en el 38,5% de los pacientes. Supervivencia a 1, 5 y 10 años en TxC por MCh con Ra versus no Ra: 85%, 76% y 61% versus 72%, 55% y 44% (p = 0,3). Supervivencia a 1, 5 y 10 años en TxC por MCh versus TxC por otras causas: 79%, 65% y 50% versus 79%, 62% y 47% (p = 0,5). Conclusión: En nuestra serie no se encontró diferencia estadísticamente significativa en la supervivencia de los pacientes trasplantados cardíacos por MCh en comparación con aquellos trasplantados por otras causas; así como tampoco entre los pacientes que reactivaron la enfermedad de Chagas y los que no lo hicieron.

ABSTRACT Background: Chagas disease affects about 6 million people in Latin America, and 25 to 35% progress to Chagas cardiomyopathy (ChCM). Heart transplantation (HTx) is a therapeutic option in advanced stages. Objectives: The aim of this study is to compare survival of patients with HTx due to ChCM versus those transplanted for other etiologies and to analyze the incidence of Chagas disease reactivation (Ra) and its impact on survival in this group of patients. Methods: Patients undergoing HTx between August 1998 and March 2021 were retrospectively evaluated. Survival was analyzed using Kaplan-Meier curves and the log-rank test. The diagnosis of Ra was performed by molecular methods, Strout's test in peripheral blood, myocardial tissue or skin tissue. Results: Of 606 patients with Htx, 39(6,4%) presented ChCM. Median follow up was 4.4 years (interquartile range 1.2-8.6). Median age of the subgroup with ChCM was 51 years (IQR 45-60) and 28 were men (72%). Reactivation was documented in 38.5% of the patients. Survival at 1, 5 and 10 years in HTx recipients due to ChCM and Ra versus no Ra was 85%, 76% and 61% versus 72%, 55% and 44%, respectively (p = 0.3). Survival at 1, 5 and 10 years in HTx recipients due to ChCM versus HTx for other causes was 79%, 65% and 50% versus 79%, 62% and 47%, respectively (p = 0.5). Conclusion: In our series we did not find statistically significant differences in survival of heart transplant recipients due to ChCM versus those transplanted due to other reasons. Survival in patients with Chagas disease reactivation and those without reactivation was also similar.

COVID-19 as an enabler for enhancing online learning and teaching skills for nurse educators at the University of Namibia: Prospects and challenges

Background: The coronavirus disease 2019 (COVID-19) pandemic has caused instability in the education system and has compelled higher education institutions (HEIs) to find alternative ways of teaching and learning by making use of the latest online teaching approaches. Aim: The purpose of the study was to explore how COVID-19 could serve as an enabler for the enhancement of online learning and teaching skills for nurse educators at the University of Namibia with specific emphasis on prospects and challenges. Setting: Semi-structured interviews were conducted in English at a public nursing education institution located in the northeast of Namibia. Methods: A qualitative explorative, descriptive and contextual research design was used. Data were collected by means of in-depth semi-structured interviews with 18 nurse educators from the School of Nursing. Data were analysed using thematic analysis. Field notes were simultaneously taken to enrich the data. Results: The study revealed three themes: nurse educators' experiences of the use of online learning and teaching skills, COVID-19 as an enabler for enhancing online learning and teaching skills and strategies to sustain online teaching and learning. Conclusion: Internet technology has generated a surge in demand for web-based teaching and learning. The online learning mode was not effectively utilised during the COVID-19 era because of inadequate technological skills on the part of nurse educators. Contribution: These findings can be used by universities to equip students and academic staff with skills to adapt to e-learning as the new modus operandi in learning and teaching in the post-COVID-19 era.

Utilización de oxigenación por membrana extracorpórea venoarterial en el shock cardiogénico y paro cardiorrespiratorio refractarios: experiencia inicial de 7 años en un centro de cardiología de adultos / Venoarterial Extracorporeal Membrane Oxygenation for Refractory Cardiogenic Shock and Cardiac Arrest: An Initial 7-Year Experience in an Adult Cardiology Center

RESUMEN Introducción: La oxigenación por membrana extracorpórea venoarterial (ECMO VA) es una intervención de rescate en pacientes con shock cardiogénico (SC), y paro cardiorrespiratorio (PCR) refractarios a las terapias convencionales. Objetivo: Describir las características, y resumir nuestra experiencia inicial de 7 años de pacientes que requirieron ECMO VA por SC o PCR. Material y métodos: Se realizó un estudio de cohorte unicéntrico. Se analizaron retrospectivamente los pacientes adultos consecutivos que fueron asistidos con ECMO VA por SC o PCR refractarios entre 2014 y 2020 en el ICBA Instituto Cardiovascular. Resultados: Se incluyeron 54 pacientes, (54 ± 12 años). El 36,5% presentó miocardiopatía isquémica, y el 23,1% enfermedad valvular significativa. Las indicaciones para ECMO VA fueron: poscardiotomía (43,4%), SC refractario (28,3%), y falla primaria del injerto (20,8%). La reanimación cardiopulmonar previa a la ECMO VA se realizó en el 18,5%. La canulación fue periférica en el 81,5%, el 83,3% se asistió en INTERMACS 1, y el 87% presentaba balón de contrapulsación intraaórtico. La duración de asistencia en ECMO VA fue de 5,5 días (RIC 2,8-10). La tasa de supervivencia en ECMO VA fue del 63% (37% puente a trasplante cardíaco, y 26% recuperación), y al alta del 42,6%. Las complicaciones más frecuentes fueron: sangrado (61,1%), infección (51,9%), y complicaciones tromboembólicas (46,3%). Conclusión: La ECMO VA como tratamiento del SC o PCR refractarios en nuestro centro presentó una sobrevida aceptable al alta hospitalaria. La ECMO VA es un tratamiento efectivo cuando las terapias convencionales fallan, siendo aparentemente útil y aplicable en un país donde existe acceso limitado a los dispositivos de asistencia ventricular compleja.

ABSTRACT Background: Venoarterial extra corporeal membrane oxygenation (VA-ECMO) is a rescue intervention used in patients with cardiogenic shock (CS) or cardiac arrest (CA) refractory to conventional medical therapies. Objective: The aim of the present study is to describe the characteristics and summarize our 7-year experience in patients with CS or CA supported with VA-ECMO. Methods: We conducted a single-center retrospective study analyzing consecutive adult patients requiring VA-ECMO due to refractory CS or CA at ICBA, Instituto Cardiovascular between January 2014 and December 2020. Results: A total age 54 patients were included (54 ± 12 years), 36.5% presented ischemic cardiomyopathy and 23.1% significant valvular heart disease. The indications for VA-ECMO implantation were post-cardiotomy (43.4%), refractory CS (28.3%) and primary graft dysfunction (20.8%). Cardiopulmonary resuscitation before VA-ECMO occurred in 18.5% of the cases. Peripheral cannulation was performed in 81.5% of the cases, 83.3% had INTERMACS profile 1 and 87% were on intraaortic balloon pump. Duration of ventricular assistance on VA- ECMO was 5.5 days (IQR 2.8-10). Survival rate on ECMO VA was 63% (37% as a bridge to cardiac transplantation and 26% as a bridge to recovery) and survival to discharge was 42.6%. The most common complications were hemorrhage (61.1%), infections (51.9%), and thromboembolic complications (46.3%). Conclusion: In our center, VA-ECMO as a treatment for refractory CS or CA showed acceptable survival during ventricular support and on hospital discharge. It is an effective life support treatment to rescue critically ill patients when conventional therapies fail, is apparently useful and can be implemented in a country with limited resources and access to complex ventricular assist devices.

Shock cardiogénico en infarto agudo de miocardio y soporte circulatorio puente al trasplante / Ischemic cardiogenic shock and short-term mechanical circulatory support as bridge to Transplantation

Resumen El shock cardiogénico (SC) presenta una elevada mortalidad y puede requerir de terapéuticas avanzadas como la asistencia circulatoria mecánica (ACM) y el trasplante cardíaco (TC). Se analizaron en forma retrospectiva, en un único centro, aquellos pacientes que presentaron un infarto agudo de miocardio (IAM), SC y requirieron ACM puente al TC. Entre enero 1997 y junio 2020, 524 pacientes recibieron un TC, 203 por cardiopatía isquémica, 103 en lista de emergencia. Se incluyeron once pacientes con los criterios mencionados (edad media 53 ± 11 años; hombres 73%). Se realizaron 5 angioplastias primarias y 2 cirugías de revascularización miocárdica de urgencia. Cuatro pacientes presentaban anatomía coronaria no pasible de revascularización. Todos recibieron tratamiento inotrópico y vasopresor y requirieron soporte con balón de contrapulsación intra aórtico (BCIA). Dos requirieron el implante de bomba centrífuga univentricular izquierda (BioMedicus®, Medtronic) y 2 de oxigenador de membrana extracorpóreo veno-arterial (ECMO-VA) periférico (Maquet®, Getinge Group). La mediana entre IAM y TC fue 15 días (rango 7-21) y la edad de los donantes 28 ± 11 años. Todos presentaron un IAM extenso (monto necrótico 35 ± 5%) con signos histopatológicos de necrosis transmural e injuria de reperfusión. La mediana de seguimiento fue 9 años (rango 1-15). Ninguno falleció en la internación ni durante el primer año post trasplante. La supervivencia a los 5 y 10 años fue 73% y 55%. El TC en situación de emergencia ha demostrado ser, en nuestro medio, la mejor opción en aquellos pacientes con IAM y SC refractario a la terapia convencional.

Abstract Cardiogenic shock (CS) has a high mortality rate and often requires advanced therapies such as mechanical circulatory support (MCS) and heart transplantation (HT). Those patients who presented an acute myocardial infarction (AMI) with CS and required support through MCS as bridge to HT were retrospectively analyzed in a single Center. Between January 1997 and June 2020, 524 patients received HT, 203 for ischemic-cardiomyopathy, 103 were in emergency waiting list. Eleven patients met the inclusion criteria (mean age 53 ± 11 years old; men 73%). Five primary angioplasties and 2 emergency myocardial revasculariza tion surgeries were performed. Four patients had coronary anatomy not subject to revascularization. All received inotropic and vasopressor treatment and required intra-aortic balloon pump (IABP). Subsequently, two required support with a left univentricular centrifugal pump (BioMedicus®, Medtronic) and two with peripheral veno-arterial extracorporeal membrane oxygenator (VA-ECMO) (Maquet®, Getinge Group). The median between AMI and HT was 15 days (range 7-21) and the mean age of the donors 28 ± 11 years. All had extensive AMI (necrotic amount 35 ± 5%) with histopathological signs of transmural necrosis and reperfusion injury. The median follow-up was 9 years (range 1-15). None died in hospitalization or during the first year after transplantation. Survival at 5 and 10 years was 73% and 55%. Emergency HT may be the best option for selected patients with acute myocardial infarction and cardiogenic shock refractory to conventional therapy.

Risk factors associated with SARS-CoV-2 pneumonia in the pediatric population / Factores de riesgo asociados con neumonía por SARS-CoV-2 en población pediátrica

Abstract Background: Currently, there are a few studies on the clinical characteristics of the pediatric population with COVID-19 and pneumonia. This study aimed to analyze data associated with the development of pneumonia in children and adolescents with SARS-CoV-2 infection throughout Mexico. Methods: We conducted a secondary analysis of the database of the Dirección General de Epidemiología of the Mexican Government. We included children under the age of 19 who were confirmed with SARS-CoV-2 infection by reverse transcription-polymerase chain reaction (RT-PCR) test. The dependent variable was the diagnosis of pneumonia. Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated. Multiple logistic regression models were performed to adjust factors associated with pneumonia. Results: A total of 1443 children with a COVID-19 diagnosis were included. The median age of the participants was 12 years (interquartile range 25, 75: 5, 16). Pneumonia occurred in 141 children (9.8%). The main risk factors were age < 3 years (OR, 3.5; 95%CI, 2.45-5.03); diabetes or obesity (OR, 12.6; 95%CI, 4.62-34.91); and immunocompromise (OR, 7.03; 95%CI, 3.97-13.61). Conclusions: Children < 3 years with COVID-19 and comorbidities, especially diabetes or obesity, and immunocompromised patients have a higher risk of developing pneumonia.

Resumen Introducción: Hasta ahora existen pocos estudios sobre las características clínicas de la población pediátrica con neumonía por COVID-19. El objetivo de este estudio fue analizar los datos que se asocian con el desarrollo de neumonía en niños y adolescentes con infección por SARS-CoV-2 en México. Métodos: Se llevó a cabo un análisis secundario de la base de datos de la Dirección General de Epidemiología del Gobierno Mexicano. Se incluyeron menores de 19 años con infección por SARS-CoV-2 confirmada mediante la prueba de retrotranscripción acoplada a la reacción en cadena de la polimerasa (RT-PCR). La variable dependiente fue el diagnóstico de neumonía. Se calcularon las razones de momios (RM) y los intervalos de confianza del 95% (IC95%). Se realizaron modelos de regresión logística múltiple para ajustar los factores asociados a neumonía. Resultados: Se incluyeron 1443 niños con diagnóstico de COVID-19. La mediana de edad de los participantes fue de 12 años (rango intercuartilar 25-75: 5-16). La neumonía se presentó en 141 niños (9.8%). Los principales factores de riesgo fueron edad < 3 años (RM: 3.5; IC95%: 2.45-5.03), diabetes u obesidad (RM: 12.6; IC95%: 4.62-34.91) e inmunocompromiso (RM: 7.03; IC95%: 3.97-13.61). Conclusiones: Los niños con COVID-19 menores de 3 años y con comorbilidad, especialmente diabetes u obesidad, y los inmunocomprometidos presentan mayor riesgo de desarrollar neumonía.

Primer implante exitoso de asistencia ventricular izquierda HeartMate 3TM como terapia de destino en Argentina. Revisión de la literatura / First successful Heartmate 3TM left ventricular assist device implantation as destination therapy in Argentina

RESUMEN Se presenta el primer implante exitoso de asistencia ventricular izquierda como terapia de destino mediante el dispositivo de flujo continuo centrífugo con levitación magnética intracorpóreo HeartMate 3TM (Abbott) en la Argentina. El dispositivo se implantó en una paciente de 52 años portadora de miocardio no compacto con disfunción ventricular izquierda grave, hipertensión pulmonar, insuficiencia cardíaca avanzada en estadio INTERMACS 3 y contraindicación para trasplante cardíaco debido a títulos elevados de anticuerpos preformados contra el sistema HLA en crossmatch contra panel.

ABSTRACT First case of successful implantation of intracorporeal full magnetically levitated continuous centrifugal flow left ventricular assist device HeartMate 3 Abbott® as destination therapy in Argentina in a female patient, 52-years-old with non compaction cardiomyopathy, severe left ventricular dysfunction, pulmonary hypertension, end-stage heart failure INTERMACS 3 and contraindication for heart transplantation due to high titers of preformed antibodies against the HLA system in panel reactive antibody assay.

Factors predicting knowledge on COVID-19 misconceptions and perception of government efforts in Ghana: a cross-sectional study

Background:With the increasing rate of COVID-19 cases and mortality across the globe, countries and most people have adopted precautionary and preventive measures to avoid been infected with the disease. However, several trending myths and misconceptions also floodsthe world during this era.Methods: A cross-sectional study was conducted among 587 participants (53% males, 78% aged 18-30 years, and 74% having at least tertiary level education) in Ghana, using a convenience snowballing sampling approach. A self-designed questionnaire based on “World Health Organization (WHO) myth-busters” was used for data collection. A logistic regression model was developed to explore variables predicting misconceptions.Results: With about 75% of respondents believing they knew “a lot” about coronavirus, 41% (confidence interval: 37-45) reported a high level of knowledge on the new coronavirus misconceptions. Social media (87%), and television/radio (57%) were the major sources of knowledge. Masters/Ph.D. degree education, National democratic congress (NDC)political members, other political party members, excellent self-health ratings, social media, respondents that anticipate a remedy in 1-5 years, and the perception that the government is “not doing enough” in fighting the pandemic, were reported factors predicting knowledge in a multiple logistic regression model (p<0.05). Region of residence, political affiliation, self-health ratings, predicted time of remedy, and level of knowledge on covid-19 misconceptions were also associatedwith the perception of government efforts (p<0.05).Conclusion: Most Ghanaians have much belief in trending misinformation related to the pandemic. Public health education and campaigns should address these misconceptions and encourage the public to seek information from credible sources

Epidemiology of Coronavirus Disease (COVID-19) in Nigeria

In late December 2019, there was an outbreak of a new Coronavirus infection in Wuhan, Hubei Province, China, which caused acute respiratory syndrome of unknown aetiology. The World Health Organization (WHO) named the virus Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV2) or COVID-19 and declared the infection a pandemic on the 11th of March 2020. The first case of COVID-19 in Nigeria was reported on the 27th of February 2020 and since then the numbers of confirmed cases has been on the increase, at least in Nigeria. With no vaccine or cure in sight, only public health measures that include personal protective measures, physical distancing, environmental and travel-related measures have been recommended to mitigate and contain the spread of the disease. There is need to make testing for COVID-19 widely available so that the true burden of the infection will be described. This step should assist policy makers in making evidence-based decisions in the prevention and control of the disease

Workplace assault and its' impact to service delivery amongst dental professionals at Tertiary Hospitals in Northern Nigeria

Objective: The growing global public health concern of workplace assaults has necessitated that workers' health and safety be given same priority as patient's safety. The study assessed the prevalence of workplace assault and its' impact on service delivery among dental professionals at tertiary hospitals in Northern Nigeria. Methods: A cross-sectional survey of 60 dental professionals working in tertiary hospitals actively involved in undergraduate and postgraduate trainings for dental workforce in Northern Nigeria. Multi-stage sampling technique was used in selection of respondents and participation was voluntary. Data was collected using structured self-administered questionnaire. Statistical analysis was done using SPSS version 23.0 and p-value ≤ 0.05 was considered statistically significant. Ethical approval was received. Results: Sixty percent dentists and 40.0% dental auxiliaries participated in the study. Assault prevalence was 38.3% observed more among dental professionals (44.0%) in their first year in practice. Types of assaults experienced were; non-physical 19 (82.6%) with loud shouting and threats as most frequent, physical 3 (13.0%) with bullying and mobbing most frequent, and combination was 1 (4.4%). Patients (60.9%) and relatives (52.2%) were major culprits, and long appointment (65.2%) and treatment cost (60.9%) were main reasons for assault. Respondents (39.1%) expressed impact on their productivity and 69.6% respondents were ill-prepared to handle it. Conclusion: The prevalence of workplace assaults on dental professionals was fairly high and those in their first year in practice suffer more assault than others. Assault preventive programs should however specifically target this group in consideration with the unique nature and varied needs of each healthcare institutions

Statistical association of rs2243250 polymorphism of IL4 gene and hemorrhagic stroke in Brazilian population / Associação estatística entre o polimorfismo rs2243250 no gene da IL-4 e o AVC hemorrágico na população brasileira

ABSTRACT Interleukin-4 (IL-4) has great significance in inflammatory processes in cases of stroke, since it is able to polarize microglia to the antiinflammatory phenotype called M2. This study analyzed if the variation between TT genotype and the other genotypes (CT and CC), in -589 (rs2243250) polymorphism of IL4 gene, has association with the prognosis of hemorrhagic stroke (HS) and with clinical aspects which are risk factors for cerebrovascular diseases. The result of this study shows that there is no statistical association of the IL4 polymorphism with either prognosis or clinical aspects in HS patients.

RESUMEN La interleucina-4 (IL-4) tiene gran importancia en los procesos inflamatorios en casos de accidente cerebrovascular (ACV), puesto que hace que las microglías sean polarizadas hacia el fenotipo antiinflamatorio M2. Este estudio analizó si la variación entre el genotipo TT y los demás genotipos (CT y CC), en el polimorfismo -589 (rs2243250) del gen IL4, posee asociación con el pronóstico de ACV hemorrágico y con aspectos clínicos que son factores de riesgo para enfermedades cerebrovasculares. El resultado de este estudio enseña que no hay asociación estadística del polimorfismo del IL4 ni con el pronóstico ni con los aspectos clínicos de pacientes con ACV hemorrágico.

RESUMO A interleucina-4 (IL-4) tem grande importância nos processos inflamatórios em casos de acidente vascular cerebral (AVC), uma vez que ela é capaz de polarizar micróglias para o fenótipo anti-inflamatório chamado M2. Este estudo analisou se a variação entre o genótipo TT e os demais genótipos (CT e CC), no polimorfismo -589 (rs2243250) do gene IL4, possui associação com o prognóstico de AVC hemorrágico e com aspectos clínicos que são fatores de risco para doenças cerebrovasculares. O resultado deste estudo mostra que não há associação estatística do polimorfismo do IL4 nem com prognóstico nem com os aspectos clínicos dos pacientes com AVC hemorrágico.

Association of the CHGA gene polymorphism in patients with hemorrhagic stroke and/or aneurysm / Associação do polimorfismo do gene CHGA em pacientes com acidente vascular encefálico hemorrágico e/ou aneurisma

ABSTRACT Introduction: Cerebrovascular diseases have been associated with several genes. Chromogranin A (CHGA) has been used as maker in cardiovascular disease. Therefore, evaluating the polymorphism and verifying its association with this pathology is very important to better understand this disease. Objective: The aim of this study was to identify the association between coding region polymorphism in -264 position of the CHGA gene (Glu264Asp) and hemorrhagic stroke (HS)/aneurysm in the Federal District, Brazil. Methods: This is a population-based case-control, involving 45 cases with HS and/or aneurysm. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method is used for genotyping these samples. A significance level of 5% was adopted. Results: The absence of the CC genotype the Glu264Asp CHGA polymorphism in the study participants and the significant presence of the GC heterozygote genotype were observed in this study. However, the distribution of genotypes did not differ statistically in the groups. Conclusion: The Glu264Asp CHGA polymorphism does not seem to contribute to the genesis of the CHGA protein expression in this patients group, but to understand whether or not there is a possible association of the pathology in question and whether the mutation will contribute in the gene therapy and thus to improve patients' quality of life.

RESUMEN Introducción: Enfermedades cerebrovasculares han sido vinculadas a diversos genes. La cromogranina A (CgA) es utilizada como un marcador en enfermedades cardiovasculares. Por consiguiente, evaluar el polimorfismo y verificar la asociación con esa patología es muy importante para la mejor comprensión de la enfermedad. Objetivo: El enfoque del ensayo fue identificar la asociación entre el polimorfismo en la región codificante en la posición -264 del gen CHGA (Glu264Asp) y el accidente cerebrovascular hemorrágico (ACVH)/aneurisma en Distrito Federal, Brasil. Métodos: Estudio de caso-control de base poblacional, involucrando 45 casos con ACVH y/o aneurisma. Para el genotipaje de las muestras, se utilizó la técnica de laboratorio reacción en cadena de la polimerasa-polimorfismos en la longitud de los fragmentos de restricción (PCR-RFLP). Nivel de significación elegido: 5%. Resultados: Ausencia del genotipo CC del polimorfismo Glu264Asp CHGA en los participantes del ensayo y presencia significativa del genotipo heterocigoto GC. Sin embargo, la distribución de los genotipos no difirió estadísticamente en los grupos. Conclusión: El polimorfismo Glu264Asp CHGA parece no contribuir para la génesis de la expresión de la proteína CgA en este grupo de pacientes, pero revelar si existe o no una posible asociación de la patología en cuestión y si la mutación contribuirá para la terapia genética y mejorará la calidad de vida de los pacientes.

RESUMO Introdução: Doenças cerebrovasculares têm sido ligadas a diversos genes. A cromogranina A (CHGA) é utilizada como um marcador em doenças cardiovasculares. Portanto, avaliar o polimorfismo e verificar a associação com essa patologia é muito importante para melhor compreensão dessa doença. Objetivo: O foco do estudo foi identificar a associação entre o polimorfismo na região codante posição -264 do gene CHGA (Glu264Asp) e o acidente vascular encefálico hemorrágico (AVEH)/aneurisma no Distrito Federal, Brasil. Métodos: Estudo caso-controle de base populacional, envolvendo 45 casos com AVEH e/ou aneurisma. Para a genotipagem dessas amostras, utilizou-se a técnica laboratorial reação em cadeia da polimerase-polimorfismo de comprimento de fragmento de limitação (PCR-RFLP). Nível de significância de 5% foi adotado. Resultados: A ausência do genótipo CC do polimorfismo Glu264Asp CHGA nos participantes do estudo e a presença significativa do genótipo heterozigoto GC foram verificadas. No entanto, a distribuição dos genótipos não diferiu estatisticamente nos grupos. Conclusão: O polimorfismo Glu264Asp CHGA parece não contribuir para a gênese da expressão da proteína CHGA nesse grupo de pacientes, mas revela se existe ou não uma possível associação da patologia em questão e se a mutação contribuirá para a terapia gênica e melhorará a qualidade de vida dos pacientes.

Fractura del gaucho: Mecanismo inusual de fracturas lumbares bajas de tipo estallido / "Gaucho´s fracture". An unusual mechanism of lumbar burst fractures in horse riders

Comunicamos dos casos de fracturas lumbares bajas de tipo estallido con compromiso de la cuarta vértebra lumbar (L4), en pacientes que desarrollan la actividad conocida como "jineteada gaucha", quienes sufrieron una caída de tipo "voleo", en la cual el caballo cae hacia atrás sobre su dorso aprisionando al jinete contra el suelo. Nivel de Evidencia: IV

We discuss two cases of lumbar burst fractures at the fourth lumbar spine vertebra (L4), in patients engaging in a type of horseriding activity known as jineteada gaucha, in which the horse falls on its back, holding the rider against the ground. Level of Evidence: IV

Resección de nódulo pulmonar en pulmón trasplantado bajo asistencia con membrana de oxigenación extracorpórea / Resection of a pulmonary nodule in a transplanted lung under extracorporeal membrane oxygenation

La utilización de soporte perioperatorio con sistema de oxigenación a través de membrana extracorpórea (ECMO) es un concepto novedoso en cirugía torácica general. Se presenta el caso de un paciente con trasplante pulmonar derecho por fibrosis pulmonar idiopática (FPI) que requirió la resección de un nódulo pulmonar homolateral con soporte de ECMO veno-venoso (VV). El soporte a través de ECMO VV es una opción viable cuando se prevén dificultades con la ventilación unipulmonar en casos seleccionados.

The use of perioperative support with extracorporeal membrane oxygenation (ECMO) systems is a novel concept in general thoracic surgery We report the case of a male patient with a history of right lung transplant due to idiopathic pulmonary fibrosis (IPF) who required resection of a right pulmonary nodule under veno-venous (VV) ECMO support. The use of VV-ECMO is a feasible option in selected cases when complications are expected to occur with one lung ventilation.

Metanálisis sobre la mortalidad hospitalaria del reemplazo valvular aórtico en pacientes con riesgo bajo e intermedio en Argentina / Single-arm Meta-analysis of Argentine Studies Reporting In-hospital Mortality After Aortic Valve Replacement in Low and Intermediate Risk Patients

RESUMEN Introducción: Actualmente, la cirugía de reemplazo valvular es la primera opción para el tratamiento de la enfermedad aórtica sintomática excepto en pacientes añosos de alto riesgo, en los cuales el implante valvular aórtico transcatéter (TAVI) sería una mejor alternativa. Objetivos: Considerando que se ha propuesto extender el uso de TAVI a otros grupos de bajo riesgo, el propósito de este estudio fue realizar un metanálisis de estudios de grupo único sobre mortalidad hospitalaria luego de la cirugía de reemplazo valvular aórtico en pacientes de riesgo bajo y moderado en Argentina, como punto de referencia para comparar con los resultados locales de TAVI. Métodos: Se realizó una revisión sistemática utilizando estudios observacionales identificados en MEDLINE, Embase, SCOPUS, y la biblioteca Cochrane hasta marzo de 2019. Resultados: De 80 estudios identificados a través de la búsqueda, 4 estudios observacionales consideraron mortalidad hospitalaria y complicaciones post-quirúrgicas luego del reemplazo valvular aórtico, divididos en pacientes de riesgo moderado y/o bajo de acuerdo al puntaje STS o EuroSCORE II. En 1.192 pacientes, la mortalidad fue de 3.1%. Las estimaciones ponderadas del conjunto de estudios fueron: accidente cerebrovascular postquirúrgico 1.3%, infarto de miocardio 0.4%, necesidad de marcapasos definitivo 2.7%, mediastinitis 1.4% y reoperación por sangrado 2.6%. Conclusiones: La eficacia de TAVI en pacientes de alto riesgo está produciendo la expansión de esta indicación a casos de menor riesgo, aunque dicho avance debería estar apoyado por evidencia significativa de su beneficio sobre la cirugía de reemplazo valvular. Este metanálisis de estudios de grupo único argentinos presenta la mortalidad hospitalaria y las complicaciones post-quirúrgicas luego del reemplazo valvular aórtico en pacientes de riesgo bajo e intermedio. La información actualizada de resultados de cirugía locales podría servir como punto de referencia para compararla con el desempeño de TAVI en nuestro medio.

ABSTRACT Background: Current evidence favors surgical valve replacement to treat symptomatic aortic disease, except in elderly patients at increased risk for surgery, in whom transcatheter aortic valve implantation (TAVI) may be eligible. Objectives: Considering that the use of TAVI has been proposed to be extended to other groups at lower risk, the purpose of this study was to perform a single-arm meta-analysis of local studies reporting in-hospital mortality after surgical aortic valve replacement in low and intermediate risk patients in Argentina, as a benchmark for comparing with local TAVI outcomes. Methods: A systematic review search strategy was performed using controlled trials and observational studies identified in MEDLINE, Embase, SCOPUS, and the Cochrane library to March 2019. Results: Among 80 studies identified through the search, 4 observational articles reported in-hospital mortality and postoperative complications after aortic valve replacement, divided into intermediate and/or low risk patients according to the STS score or the EuroSCORE II. In 1,192 patients, in-hospital mortality was 3.1%. Weighted pooled estimates were: postoperative stroke1.3%, myocardial infarction 0.4%, need for definite pacemaker 2.7%, mediastinitis 1.4%, and reoperation for bleeding 2.6%. Conclusions: The proven efficacy of TAVI in high-risk patients is leading to the expansion of its indications toward lower-risk cases; but this shift should be supported by meaningful evidence of its benefit over surgical valve replacement. This single-arm meta-analysis of Argentine studies presents in-hospital mortality and postoperative complications after aortic valve replacement in low and intermediate risk patients. The updated information on local results of surgery could serve as a benchmark for comparing with TAVI performance in our setting.

Lesión dural asociada a fracturas de charnela toracolumbar y lumbares con compromiso del muro posterior: Relación con las variables del sistema de clasificación AOSpine / Thecal sac injury secondary to burst fractures of the thoracolumbar and lumbar spine, and its association with the AOSpine Classification System variables

Introducción: Las lesiones del saco dural con atrapamiento de la cauda equina entre los fragmentos óseos pueden estar asociadas con fracturas toracolumbares. Objetivo: Realizar un análisis retrospectivo de las variables clínico-radiográficas y el sistema de clasificación AOSpine y la posibilidad de lesión dural asociada en una serie de fracturas toracolumbares por estallido, tratadas en nuestro Centro. Materiales y Métodos: Estudio retrospectivo, observacional de una serie de pacientes con fracturas toracolumbares con compromiso del muro posterior operados en nuestra institución, entre enero de 2012 y diciembre de 2017. Resultados: Se incluyeron 46 pacientes, 16 casos con lesión del saco dural asociada. Las variables porcentaje de ocupación del canal, distancia interpedicular, ángulo del fragmento retropulsado y déficit neurológico asociado mostraron diferencias estadísticamente significativas según la comparación en función de la presencia o ausencia de lesión dural (p = 0,046, p = 0,007, p = 0,046 y p = 0,004, respectivamente). Conclusiones: Según nuestros resultados, la lesión dural traumática podría ser contemplada en la planificación del tratamiento de fracturas toracolumbares ante fragmentos voluminosos del muro posterior con ángulo agudo, compromiso severo del canal raquídeo, distancia interpedicular elevada y daño neurológico asociado, tal como se propone en la bibliografía. Nivel de Evidencia: IV

Introduction: Fractures of the thoracolumbar spine can trigger thecal sac injuries due to the impingement of the cauda equina between bone fragments. Objective: To carry out a retrospective analysis of clinical and radiological variables, the AOSpine Classification System and the possibility of secondary thecal sac injury in a series of thoracolumbar burst fractures treated at our center. Materials and Methods: A retrospective, observational study of a series of patients with thoracolumbar fractures with compromise of the posterior vertebral body wall, who underwent surgery at our center between January 2012 and December 2017. Results: Forty-six patients were included, 16 of which had secondary thecal sac injury. The differences in the variables-percentage of spinal canal involvement, interpedicular distance, angle of the retropulsed fragment, neurological deficit and type C fractures-were statistically significant according to the comparison made with the presence or absence of thecal sac injury (p=0.046, p=0.007, p=0.046, p=0.004, p=0,001 respectively). Conclusions: This study suggests that traumatic thecal sac injury could be suspected when managing burst fractures with prominent fragments in the posterior vertebral body wall, acute angle of the retropulsed fragment, severe compression of the spinal canal, wide interpedicular distance, neurological deficit and fracture displacement (fracture type C according to the AOSpine Classification System). Level of Evidence: IV