[MINOCA and Coronary Ectasia: a rare combination of causes of infarction] / MINOCA y Ectasia Coronaria: una combinación inusual de causas de infarto

Objective: to describe a patient with myocardial ischemia with multiple causes. Clinical Case: This clinical case describes a 58-year-old man with a history of hypertension, dyslipidemia, COPD and previous myocardial infarction (AMI). He went to the emergency room with chest pain and dyspnea. Findings included bibasal crackles, electrocardiogram with old anterior fibrosis, elevated NT-ProBNP, and echocardiogram with septoapical akinesia. During hospitalization, he experienced tachyarrhythmia and hemodynamic deterioration, undergoing electrical cardioversion (CVE). Non-ST segment elevation acute coronary syndrome (NSTEACS) complicated with ventricular arrhythmia and acute pulmonary edema was diagnosed. Coronary angiography revealed coronary ectasias without obstructive lesions, but with mild stenosis in three vessels. The patient was successfully treated with non-invasive ventilation, diuretics, vasodilators and anticoagulation. The discharge was granted with the plan to further studies to optimize and guide treatment and finally the diagnosis of Myocardial Infarction with Non-Obstructive Arteries (MINOCA) and the presence of coronary ectasias was addressed. Conclusion: it is important to highlight the non-ischemic causes in MINOCA and the association between coronary ectasia and cardiovascular events, which is why we emphasize the need for more studies to better understand the relationship between these phenomena.

Objetivo: describir un paciente con isquemia miocárdica con múltiples causas. Caso Clínico: En este caso clínico se describe a un hombre de 58 años con antecedentes de hipertensión, dislipidemia, EPOC e infarto de miocardio (IAM) previo. Acudió a urgencias con dolor torácico y disnea. Los hallazgos incluyeron crepitantes bibasales, electrocardiograma con fibrosis anterior antigua, NT-ProBNP elevado y ecocardiograma con acinesia septoapical. Durante la hospitalización, experimentó taquiarritmia y deterioro hemodinámico, siendo sometido a cardioversión eléctrica (CVE). Se diagnosticó síndrome coronario agudo sin elevación del segmento ST (SCASEST) complicado con arritmia ventricular y edema pulmonar agudo. La angiografía coronaria reveló ectasias coronarias sin lesiones obstructivas, pero con estenosis leve en tres vasos. El paciente fue tratado con éxito mediante ventilación no invasiva, diuréticos, vasodilatadores y anticoagulación. Se otorgó el alta con el plan de profundizar estudios para optimizar y guiar tratamiento y finalmente se abordó al diagnóstico de Infarto de Miocardio con Arterias No Obstructivas (MINOCA) y la presencia de ectasias coronarias. Conclusión: es importante destacar las causas no isquémicas en MINOCA y la asociación entre ectasia coronaria y eventos cardiovasculares, por lo que subrayamos la necesidad de más estudios para comprender mejor la relación entre estos fenómenos.

Factors influencing witnesses' perception of patient safety during pre-hospital health care from emergency medical services: A multi-center cross-sectional study.

AIM: To determine the factors related with the perception of feeling safe during pre-hospital emergency care. METHODS: A multi-centred, cross-sectional study. Data collection from April 2021 to March 2022, in the Centro de Emergencias Sanitarias 061 (Andalusia, Spain). INCLUSION CRITERIA: witnesses of health care by emergency medical services. EXCLUSION CRITERIA: minors, or communication barriers. OUTCOME VARIABLE: Witness Perceived Safety Scale ESPT10. The variables studied were related with sociodemographic data, the request for health care, the patient, the hospital transfer and patient safety incidents. A multivariate linear regression model was constructed for the dependent variable. The study followed STROBE statement. RESULTS: Responses were obtained from 1400 witnesses. The linear regression model showed that the score on the scale increased as the witnesses felt more satisfied (B = 1.302; p < 0.001). On the contrary, the score was lower when the witness reported a patient safety incident (B = -2.856; p < 0.001 and B = -3.166; p < 0.001), or when the assistance took place in a public space (B = -0.722; p = 0.017). CONCLUSIONS: The level of satisfaction, the occurrence of a patient safety incident, and the place of health care are related factors with the perception of the witnesses. The Witness Perceived Safety Scale ESPT10 could be considered a valid and useful patient safety indicator.

Factors related to patients' perception of feeling safe in pre-hospital emergencies: a multicenter cross-sectional study. / Factores relacionados con la percepción de los pacientes de sentirse seguros en emergencias extrahospitalarias: estudio transversal multicéntrico.

OBJECTIVES: To identify factors related to patients' feeling of safety during prehospital emergencies. MATERIAL AND METHODS: Descriptive, multicenter cross-sectional study in the context of "061" emergency response services of Andalusia, Spain. Data were collected from April 2021 to March 2022. Patients attended and transported by emergency responders were eligible for inclusion. Patients were excluded if they were minors or in an altered state of consciousness, or had cognitive impairment or any barrier to communication. We calculated that a minimum sample size of 644 patients would be required. The outcome variable was the score on a 16-item scale of patient-perceived safety (ESP16, as abbreviated in Spanish). Sociodemographic, emergency service response, patient, and hospital transfer variables were studied in relation to ESP16 score. We also collected patient safety incident reports. Multivariate linear regression was used to analyze associations between the independent variables and the dependent outcome variable. Guidelines for Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) were followed. RESULTS: We received 1756 responses. The mean (SD) ESP16 score was 77.7 (5.6); the median score was 80. The ßô€€ƒ coefficients derived from the linear regression model were as follows for the variables associated with the ESP16 score: 2.799 (P .001) for satisfaction; -6.097 (P .001) for incident reports of errors, falls, harm, or injury; -2.742 (P .001) for reports of any other incident during attendance; 2.538 (P = .001) for use of the transport protocol; 1.157 (P .001) for type of emergency transport used; 0.726 (P = .014) for a cardiology diagnosis; and 1.195 (P = .003) for pain intensity. CONCLUSION: Patients' perception of safety is very high, as reflected by level of satisfaction, incident reports, use of a transport protocol, means of transport used, diagnosis, and pain level.

OBJETIVO: Conocer los factores que se relacionan con la percepción de los pacientes de sentirse seguros en emergencias extrahospitalarias. METODO: Estudio observacional descriptivo, transversal, multicéntrico, en los equipos de emergencias 061 de Andalucía. Se recogieron los datos desde abril 2021 hasta marzo 2022. Criterios de inclusión fueron pacientes asistidos y trasladados por equipos de emergencias, y los criterios de exclusión fueron menores de edad, deterioro cognitivo, alteración de consciencia, o barreras comunicativas. Se calculó un tamaño muestral mínimo de 644 sujetos. La variable resultado fue la puntuación de la Escala de Seguridad Percibida (ESP16). Se estudiaron variables sociodemográficas y relacionadas con la demanda asistencial, el paciente y el traslado. Además, se recogieron notificaciones de incidentes relacionados con la seguridad del paciente (IRSP). Se construyó un modelo de regresión lineal multivariable para la variable dependiente. Se siguieron las recomendaciones STROBE. RESULTADOS: Se obtuvieron 1.756 respuestas. La puntuación media en la ESP16 fue 77,7 (DE 5,6), con mediana de 80. El modelo de regresión lineal mostró que el nivel de satisfacción (B = 2,799; p 0,001), la notificación de error, caída, daño o lesión (B = ­6,097; p 0,001), la notificación de cualquier otro IRSP (B = ­2,742; p 0,001), la transferencia protocolizada (B = 2,538; p = 0,001), el tipo de recurso asistencial (B = 1,157; p 0,001), un diagnóstico final cardiológico (B = 0,726; p = 0,014) y un nivel de dolor intenso (B = 1,195; p = 0,003) influían en la escala ESP16. CONCLUSIONES: La percepción de seguridad del paciente es muy alta, y está condicionada por el nivel de satisfacción, la notificación de IRSP, la transferencia protocolizada, el recurso asistencial, el diagnóstico final y el nivel de dolor.

Factores relacionados con la percepción de los pacientes de sentirse seguros en emergencias extrahospitalarias: estudio transversal multicéntrico / Factors related to patients’ perception of feeling safe in pre-hospital emergencies: a multicenter cross-sectional study

Objetivos: Conocer los factores que se relacionan con la percepción de los pacientes de sentirse seguros en emergencias extrahospitalarias. Método: Estudio observacional descriptivo, transversal, multicéntrico, en los equipos de emergencias 061 de Andalucía. Se recogieron los datos desde abril 2021 hasta marzo 2022. Criterios de inclusión fueron pacientes asistidos y trasladados por equipos de emergencias, y los criterios de exclusión fueron menores de edad, deterioro cognitivo, alteración de consciencia, o barreras comunicativas. Se calculó un tamaño muestral mínimo de 644 sujetos. La variable resultado fue la puntuación de la Escala de Seguridad Percibida (ESP16). Se estudiaron variables sociodemográficas y relacionadas con la demanda asistencial, el paciente y el traslado. Además, se recogieron notificaciones de incidentes relacionados con la seguridad del paciente (IRSP). Se construyó un modelo de regresión lineal multivariable para la variable dependiente. Se siguieron las recomendaciones STROBE. Resultados: Se obtuvieron 1.756 respuestas. La puntuación media en la ESP16 fue 77,7 (DE 5,6), con mediana de 80. El modelo de regresión lineal mostró que el nivel de satisfacción (B = 2,799; p < 0,001), la notificación de error, caída, daño o lesión (B = –6,097; p < 0,001), la notificación de cualquier otro IRSP (B = –2,742; p < 0,001), la transferencia protocolizada (B = 2,538; p = 0,001), el tipo de recurso asistencial (B = 1,157; p < 0,001), un diagnóstico final cardiológico (B = 0,726; p = 0,014) y un nivel de dolor intenso (B = 1,195; p = 0,003) influían en la escala ESP16. Conclusiones: La percepción de seguridad del paciente es muy alta, y está condicionada por el nivel de satisfacción, la notificación de IRSP, la transferencia protocolizada, el recurso asistencial, el diagnóstico final y el nivel de dolor. (AU)

Aim: To identify factors related to patients’ feeling of safety during prehospital emergencies. Methods: Descriptive, multicenter cross-sectional study in the context of “061” emergency response services of Andalusia, Spain. Data were collected from April 2021 to March 2022. Patients attended and transported by emergency responders were eligible for inclusion. Patients were excluded if they were minors or in an altered state of consciousness, or had cognitive impairment or any barrier to communication. We calculated that a minimum sample size of 644 patients would be required. The outcome variable was the score on a 16-item scale of patient-perceived safety (ESP16, as abbreviated in Spanish). Sociodemographic, emergency service response, patient, and hospital transfer variables were studied in relation to ESP16 score. We also collected patient safety incident reports.Multivariate linear regression was used to analyze associations between the independent variables and the dependent outcome variable. Guidelines for Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) were followed. Results: We received 1756 responses. The mean (SD) ESP16 score was 77.7 (5.6); the median score was 80. The b coefficients derived from the linear regression model were as follows for the variables associated with the ESP16 score: 2.799 (P < .001) for satisfaction; –6.097 (P < .001) for incident reports of errors, falls, harm, or injury; –2.742 (P < .001) for reports of any other incident during attendance; 2.538 (P = .001) for use of the transport protocol; 1.157 (P < .001) for type of emergency transport used; 0.726 (P = .014) for a cardiology diagnosis; and 1.195 (P = .003) for pain intensity. Conclusions: Patients’ perception of safety is very high, as reflected by level of satisfaction, incident reports, use of a transport protocol, means of transport used, diagnosis, and pain level. (AU)

Bioceramic Cements: Supporting in Remineralization of Osteolytic Lesions in Endodontic-periodontal Diseases: A Report of Two Cases.

Bioceramic cements used for filling root canals in cases of endo-perio lesion of endodontic origin seem to be promising due to having the potential of promoting faster and more predictable healing of the periapical lesion as they stimulate osteogenesis. An effective treatment plan depends on the precise diagnosis of endo-perio lesions. The origin of an infection, being exclusive to the root canal, from the periodontium, or both, is extremely important for devising the treatment plan. In both cases, no clinical evidence of periodontal disease (bleeding, calculus, etc.) was found; however, primary endodontic lesions with the possibility of drainage through the gingival crevice were present. In addition to the disinfection strategies used during the root canal treatments, the bioceramics Bio C Sealer, Bio C Repair and Bio Root RCS were used to fill in the root canals. Both cases presented an impressive bone gain within 8 months for case 1 and 5 months for case 2. Regarding case 1, in the palatal root canal an apical plug with a bioceramic repair cement was used. Based on the literature studied, it can be concluded that after adequate disinfection of the root canals, using bioceramic cements in filling the root canals shows the potential of supporting capabilities in remineralization of osteolytic lesions in endo-perio diseases.

Non-infectious uveitis referred for pediatric rheumatologic assessment and management: a Portuguese retrospective study.

BACKGROUND: Pediatric uveitis poses challenges in diagnosis and treatment due to asymptomatic or oligosymptomatic presentations and high rates of intraocular complications. OBJECTIVES: This study aimed to characterize clinical manifestations and treatment approaches of pediatric uveitis patients in a northern Portuguese tertiary hospital. METHODOLOGY: A retrospective study was conducted involving forty-one patients diagnosed with uveitis between 2006 and 2021. All individuals identified by the Opthalmology department were referred to Pediatric Rheumatology outpatient clinic. Demographic, clinical, treatment, and intraocular complications data were collected. RESULTS: Of the patients, 78% had anterior uveitis, 17% had panuveitis, and 5% had intermediate uveitis. Uveitis associated with juvenile idiopathic arthritis was the most common cause (43.9%), predominantly in the oligoarticular, anti-nuclear antibody-positive subgroup. Complications were identified in 80.5% of the patients. Uveitis associated with JIA was diagnosed earlier (5,0 years (3,0-10,5) vs. 9,0 years (5,5-14,0), p=0,036), more frequently in asymptomatic patients (71% vs. 23%, p=0,010), had a more insidious installation (71% vs. 17%, p=0,004), and required more TNF inhibitor treatment (70% vs. 39%, p=0,027). CONCLUSION: The high rates of intraocular complications and systemic pathology association highlight the need for a combined approach of ophthalmology and pediatric rheumatology in the diagnosis and treatment of pediatric uveitis.

Inhibition of NorA efflux pump of Staphylococcus aureus by anacardic acids isolated from the cashew nutshell liquid of Anacardium occidentale L.

The rising of diseases caused by multidrug-resistant bacteria has encouraged researchers to explore more antimicrobial substances, as well as chemicals capable of potentiating the action of existing ones against multidrug-resistant bacteria. Anacardium occidentale produces a fruit known as cashew nut, filled with a dark, almost black, caustic, and flammable liquid called cashew nutshell liquid (CNSL). The goal of the study was to evaluate the intrinsic antimicrobial activity of the major compounds present in CNSL, called anacardic acids (AA), as well as their possible modulatory action as an adjuvant of Norfloxacin against a Staphylococcus aureus strain overproducing the NorA efflux pump (SA1199B). Microdilution assays were performed to determine the minimum inhibitory concentration (MIC) of AA against different microbial species. Norfloxacin and Ethidium Bromide (EtBr) resistance modulation assays were performed in the presence or absence of AA against SA1199-B. AA showed antimicrobial activity against Gram-positive bacterial strains tested but no activity against Gram-negative bacteria or yeast strains. At subinhibitory concentration, AA reduced the MIC values for Norfloxacin and EtBr against the SA1199-B strain. Furthermore, AA increased the intracellular accumulation of EtBr in this NorA overproducer strain, indicating that AA are NorA inhibitors. Docking analysis showed that AA probably modulates Norfloxacin efflux by spatial impediment at the same binding site of NorA.

Thin Films of Polyaniline-Based Nanocomposites with CeO2 and WO3 Metal Oxides Applied to the Impedimetric and Capacitive Transducer Stages in Chemical Sensors.

There is a recognized need for the development of cost-effective, stable, fast, and optimized novel materials for technological applications. Substantial research has been undertaken on the role of polymeric nanocomposites in sensing applications. However, the use of PANI-based nanocomposites in impedimetric and capacitive electrochemical sensors has yet to be understood. The present study aimed to explore the relationship between the sensitivity and linearity of electrochemical pH sensors and the composition of nanocomposites. Thin films of PANI/CeO2 and PANI/WO3 were deposited via spin coating for characterization and application during the electrochemical impedance and capacitance spectroscopy (EIS and ECS) transduction stages. The findings showed that the optimized performance of the devices was extended not only to the sensitivity but also to the linearity. An increase of 213% in the ECS sensitivity of the PANI/CeO2 compared to the metal oxide and an increase of 64% in the ECS linearity of the PANI/WO3 compared to the polymeric sensitivity were reported. This study identified the structure-property relationship of nanocomposite thin films of PANI with metal oxides for use in electrochemical sensors. The developed materials could be applied in devices to be used in different fields, such as food, environment, and biomedical monitoring.

Esthetic Considerations In Minimally Invasive Orthognathic Surgery.

Orthognathic surgery has long been successfully utilized to correct dentofacial deformities to help facilitate improved oral function and facial esthetics. The treatment, however, has been associated with a high degree of complexity and severe postoperative morbidity. More recently, minimally invasive orthognathic surgical procedures have emerged that offer potential long-term benefits such as less morbidity, a lower inflammation response, improved postoperative comfort, and better esthetic outcomes. This article examines the concept of minimally invasive orthognathic surgery (MIOS), discussing differences from traditional maxillary Le Fort I osteotomy, bilateral sagittal split osteotomy, and genioplasty procedures. MIOS protocols are described for various aspects of both the maxilla and mandible.

MEK/ERK activation plays a decisive role in Zika virus morphogenesis and release.

Brazil has experienced an increase in outbreaks caused by flaviviruses. The high incidence of dengue fever, the morbidity of Zika in children, and the high mortality of yellow fever have affected millions in recent years. Deciphering host-virus interactions is important for treating viral infections, and the mitogen-activated protein kinases (MAPK) are an interesting target because of their role in flavivirus replication. In particular, mitogen-activated protein kinase kinase (MEK), which targets extracellular-signal-regulated kinase (ERK), is necessary for dengue and yellow fever infections. In this study, we evaluated the role of the MEK/ERK pathway and the effect of the MEK inhibitor trametinib on the Asian ZIKV strain PE243 and the prototype African ZIKV strain MR766, addressing genome replication, morphogenesis, and viral release. ZIKV infection stimulated ERK phosphorylation in Vero cells at 12 and 18 hours postinfection (hpi). Trametinib showed sustained antiviral activity, inhibiting both ZIKV strains for at least four days, and electron microscopy showed probable inhibition of ZIKV morphogenesis. ZIKV PE243 can complete one cycle in Vero cells in 14 hours; genome replication was detected around 8 hpi, intracellular viral particles at 12 hpi, and extracellular progeny at 14 hpi. Treatments at 6-hour intervals showed that trametinib inhibited late stages of viral replication, and the titration of intra- or extracellular virions showed that the treatment especially affected viral morphogenesis and release. Thus, ZIKV stimulated ERK phosphorylation during viral morphogenesis and release, which correlated with trametinib inhibiting both the signaling pathway and viral replication.

Factors influencing the perception of feeling safe in pre-hospital emergency care: A mixed-methods systematic review.

AIMS: To systematically describe the factors influencing the perception of feeling safe among patients receiving pre-hospital emergency care. BACKGROUND: Patient safety is a top priority worldwide. Little is known about how patients perceive safety during emergency health care and what the related factors are. DESIGN: A mixed-methods systematic review. METHODS: Six databases were searched to December 2021. Inclusion criteria were as follows: studies with patients of any age, framed in pre-hospital emergency care settings, referring to patient safety, addressing the perception of safety, and with a quantitative or qualitative research design. Exclusion criteria were as follows: conference records, abstracts, supplements, letters, editorials and reviews. The quality of the evidence was assessed with the Joanna Briggs Institute (JBI) checklists. A convergent integrated approach was followed according to the JBI methodology. The protocol was registered on PROSPERO (CRD42022306337). PRISMA 2020 guidelines were followed in reporting this review. RESULTS: Among the 5223 records identified, the whole texts of 35 articles were reviewed. Ten studies were relevant to the research question. Seven followed a qualitative methodology, with interviews or focus group. Three involved a quantitative methodology, with questionnaires or validated measures. The 74 findings were organised into 11 categories and then grouped into four dimensions: 'receiving a satisfying response from healthcare professionals when I need it', 'EMS personnel's professional competence', 'the variable and unfamiliar settings of pre-hospital emergencies', and 'patients' personal characteristics'. CONCLUSIONS: The perception of safety is influenced by many factors, which can be grouped into four independent dimensions. Quantitative and qualitative studies can provide us with complementary findings. RELEVANCE TO CLINICAL PRACTICE: Awareness of these factors enables us to act upon them. When patients feel safe their health outcomes improve, their anxiety decreases and they collaborate more actively. NO PATIENT OR PUBLIC CONTRIBUTION: Patients and caregivers shared their experiences in the articles included.

Monitoring the Establishment of VOC Gamma in Minas Gerais, Brazil: A Retrospective Epidemiological and Genomic Surveillance Study.

Since its first identification in Brazil, the variant of concern (VOC) Gamma has been associated with increased infection and transmission rates, hospitalizations, and deaths. Minas Gerais (MG), the second-largest populated Brazilian state with more than 20 million inhabitants, observed a peak of cases and deaths in March-April 2021. We conducted a surveillance study in 1240 COVID-19-positive samples from 305 municipalities distributed across MG's 28 Regional Health Units (RHU) between 1 March to 27 April 2021. The most common variant was the VOC Gamma (71.2%), followed by the variant of interest (VOI) zeta (12.4%) and VOC alpha (9.6%). Although the predominance of Gamma was found in most of the RHUs, clusters of Zeta and Alpha variants were observed. One Alpha-clustered RHU has a history of high human mobility from countries with Alpha predominance. Other less frequent lineages, such as P.4, P.5, and P.7, were also identified. With our genomic characterization approach, we estimated the introduction of Gamma on 7 January 2021, at RHU Belo Horizonte. Differences in mortality between the Zeta, Gamma and Alpha variants were not observed. We reinforce the importance of vaccination programs to prevent severe cases and deaths during transmission peaks.

Negative correlation between ACE2 gene expression levels and loss of taste in a cohort of COVID-19 hospitalized patients: New clues to long-term cognitive disorders.

In early 2020, one of the most prevalent symptoms of SARS-CoV-2 infection was the loss of smell (anosmia), found in 60-70% of all cases. Anosmia used to occur early, concomitantly with other symptoms, and often persisted after recovery for an extended period, sometimes for months. In addition to smell disturbance, COVID-19 has also been associated with loss of taste (ageusia). The latest research suggests that SARS-CoV-2 could spread from the respiratory system to the brain through receptors in sustentacular cells localized to the olfactory epithelium. The virus invades human cells via the obligatory receptor, angiotensin-converting enzyme II (ACE2), and a priming protease, TMPRSS2, facilitating viral penetration. There is an abundant expression of both ACE2 and TMPRSS2 in sustentacular cells. In this study, we evaluated 102 COVID-19 hospitalized patients, of which 17.60% presented anosmia and 9.80% ageusia. ACE1, ACE2, and TMPRSS2 gene expression levels in nasopharyngeal tissue were obtained by RT-qPCR and measured using ΔCT analysis. ACE1 Alu287bp association was also evaluated. Logistic regression models were generated to estimate the effects of variables on ageusia and anosmia Association of ACE2 expression levels with ageusia. was observed (OR: 1.35; 95% CI: 1.098-1.775); however, no association was observed between TMPRSS2 and ACE1 expression levels and ageusia. No association was observed among the three genes and anosmia, and the Alu287bp polymorphism was not associated with any of the outcomes. Lastly, we discuss whetherthere is a bridge linking these initial symptoms, including molecular factors, to long-term COVID-19 health consequences such as cognitive dysfunctions.

Biosafety in Dental Health Care During the COVID-19 Pandemic: A Longitudinal Study.

Background: The coronavirus disease 2019 (COVID-19) pandemic had quite an impact on dental health care. Concerns about the risk of SARS-CoV-2 transmission through contaminant fluids and droplet formation during several dental procedures highly impacted dental health care, drastically reducing the number of dental practices worldwide. To monitor SARS-CoV-2 contamination in dental clinics, a longitudinal study was carried out during the return of dental practice at university. Methods: Dental health care professionals [(DHCPs); teachers, undergraduate dental students, and dental assistants] and patients were screened for SARS-CoV-2 RNA in a dental school clinic environment from 11th January to 12th March 2021 (9 weeks). Serological testing was performed on DHCPs in two-time points. Additionally, samples with low Ct values were sequenced to identify the circulating SARS-CoV-2 variant and possible transmission clusters. Results: We found a low number of dental staff (5.8%), patients (0.9%), and environment sites (0.8%) positive for SARS-CoV-2. Most positive cases had asymptomatic to mild symptoms, and two asymptomatic DHCPs presented prolonged infection. In the first week after previous exposure to COVID-19, 16.2% of DHCPs had IgM or IgG antibodies against SARS-CoV-2, and 1/3 of them had undetected antibodies in the last weeks. The variant zeta (P.2) could be detected. No cross-infection was observed between participants. Conclusion: Our study suggests that dental practice can be safely executed when adequate control measures and biosafety protocols are applied. DHCP and patient testing, patient telemonitoring, proper use of personal protection equipment, and sanitization of surfaces are essential to avoid SARS-CoV-2 cross-infection in dental practice.

Seroprevalence, Prevalence, and Genomic Surveillance: Monitoring the Initial Phases of the SARS-CoV-2 Pandemic in Betim, Brazil.

The COVID-19 pandemic has created an unprecedented need for epidemiological monitoring using diverse strategies. We conducted a project combining prevalence, seroprevalence, and genomic surveillance approaches to describe the initial pandemic stages in Betim City, Brazil. We collected 3239 subjects in a population-based age-, sex- and neighborhood-stratified, household, prospective; cross-sectional study divided into three surveys 21 days apart sampling the same geographical area. In the first survey, overall prevalence (participants positive in serological or molecular tests) reached 0.46% (90% CI 0.12-0.80%), followed by 2.69% (90% CI 1.88-3.49%) in the second survey and 6.67% (90% CI 5.42-7.92%) in the third. The underreporting reached 11, 19.6, and 20.4 times in each survey. We observed increased odds to test positive in females compared to males (OR 1.88 95% CI 1.25-2.82), while the single best predictor for positivity was ageusia/anosmia (OR 8.12, 95% CI 4.72-13.98). Thirty-five SARS-CoV-2 genomes were sequenced, of which 18 were classified as lineage B.1.1.28, while 17 were B.1.1.33. Multiple independent viral introductions were observed. Integration of multiple epidemiological strategies was able to adequately describe COVID-19 dispersion in the city. Presented results have helped local government authorities to guide pandemic management.

Optimization of In Vivo Production of Spodoptera frugiperda multiple nucleopolyhedrovirus (SfMNPV).

Insect viruses have been used to protect crops and forests worldwide for decades. Among insect viruses, isolates of Spodoptera frugiperda multiple nucleopolyhedrovirus (SfMNPV) have proven potential for the control of Spodoptera frugiperda (J. E. Smith) (FAW) (Lepidoptera: Noctuidae), a pest of many economically essential crops across several continents. Mass production of SfMNPV depends on an in vivo system using host insect rearing. However, many factors can limit its production, including abiotic factors and host characteristics, such as the stage of development and an antagonist intraspecific interaction. Thus, to improve in vivo production, we verified the most suitable larval age to inoculate the virus and the influence of incubation temperature on viral production. Subsequently, cannibal behavior was verified in FAW larvae reared at different densities, while reproducing the conditions of the best treatments. The highest viral yield occurred when FAW larvae were inoculated at 10 and 8 days old and incubated at 22 °C and 25 °C, respectively. Nonetheless, survival (lethal period in days) and cannibal behavior were positively influenced by larval development, which potentially increases the load of contamination and requires larval individualization for these production conditions. In contrast, 4-day-old larvae, which were inoculated and incubated at 31 °C, also demonstrated high viral production, with lower rates of cannibalism and death on the same day, thereby showing potential. The information presented in this study is useful for the optimization of the in vivo production systems of SfMNPV.

Seroprevalence, prevalence, and genomic surveillance: monitoring the initial phases of the SARS-CoV-2 pandemic in Betim, Brazil

The Covid-19 pandemic has created an unprecedented need for epidemiological monitoring using diverse strategies. We conducted a project combining prevalence, seroprevalence, and genomic surveillance approaches to describe the initial pandemic stages in Betim City, Brazil. We collected 3239 subjects in a population-based age-, sex- and neighbourhood-stratified, household, prospective; cross-sectional study divided into three surveys 21 days apart sampling the same geographical area. In the first survey, overall prevalence (participants positive in serological or molecular tests) reached 0.46% (90% CI 0.12% - 0.80%), followed by 2.69% (90% CI 1.88% - 3.49%) in the second survey and 6.67% (90% CI 5.42% - 7.92%) in the third. The underreporting reached 11, 19.6, and 20.4 times in each survey, respectively. We observed increased odds to test positive in females compared to males (OR 1.88 95% CI 1.25 - 2.82), while the single best predictor for positivity was ageusia/ anosmia (OR 8.12, 95% CI 4.72 - 13.98). Thirty-five SARS-CoV-2 genomes were sequenced, of which 18 were classified as lineage B.1.1.28, while 17 were B.1.1.33. Multiple independent viral introductions were observed. Integration of multiple epidemiological strategies was able to describe Covid-19 dispersion in the city adequately. Presented results have helped local government authorities to guide pandemic management.

Association between ACE2 and TMPRSS2 nasopharyngeal expression and COVID-19 respiratory distress.

ACE2 and TMPRSS2 are key players on SARS-CoV-2 entry into host cells. However, it is still unclear whether expression levels of these factors could reflect disease severity. Here, a case-control study was conducted with 213 SARS-CoV-2 positive individuals where cases were defined as COVID-19 patients with respiratory distress requiring oxygen support (N = 38) and controls were those with mild to moderate symptoms of the disease who did not need oxygen therapy along the entire clinical course (N = 175). ACE2 and TMPRSS2 mRNA levels were evaluated in nasopharyngeal swab samples by RT-qPCR and logistic regression analyzes were applied to estimate associations with respiratory outcomes. ACE2 and TMPRSS2 levels positively correlated with age, which was also strongly associated with respiratory distress. Increased nasopharyngeal ACE2 levels showed a protective effect against this outcome (adjOR = 0.30; 95% CI 0.09-0.91), while TMPRSS2/ACE2 ratio was associated with risk (adjOR = 4.28; 95% CI 1.36-13.48). On stepwise regression, TMPRSS2/ACE2 ratio outperformed ACE2 to model COVID-19 severity. When nasopharyngeal swabs were compared to bronchoalveolar lavages in an independent cohort of COVID-19 patients under mechanical ventilation, similar expression levels of these genes were observed. These data suggest nasopharyngeal TMPRSS2/ACE2 as a promising candidate for further prediction models on COVID-19.

Hemangioendotelioma kaposiforme: correlação radiológica, cirúrgica e anatomopatológica / Kaposiform hemangioendothelioma: radiological, surgical and anatomopathological correlation

Introdução: O hemangioendotelioma cutâneo kaposiforme (HEK) é um tumor vascular raro localmente agressivo, visto principalmente em recém-nascidos e crianças. Tem prevalência de 0,91 casos por 100.000 crianças, mais comum nas extremidades. O tratamento de escolha é a ressecção total, todavia muitas vezes não é possível devido à extensão da lesão e associação ao fenômeno de Kasabach-Merritt. Objetivos: Descrever a evolução de caso raro de tumor na região plantar de criança, correlacionando os achados radiológicos, cirúrgicos e histopatológicos. Métodos: Os autores relatam o caso de menino admitido aos cinco anos de idade com lesão cutânea plantar dolorosa recidivada. No exame de ressonância magnética (RMN) apresentava lesão na região plantar posterior medindo 3cmx2cm, superficial à fáscia plantar, no exame de biópsia revelou hemangioendotelioma kaposiforme, sem associação com o fenômeno de Kasabach- Merritt. Foi submetido a procedimento cirúrgico para exérese, apresentou recidiva após seis meses. Foi realizada nova ressecção ampla, reconstrução com retalho plantar e enxerto de pele parcial, obtendo-se margens livres, sem recidiva no seguimento de 15 anos. Conclusão: Os achados clínicos sugeriam fibromatose plantar, a RMN auxiliou na delimitação do tumor, o exame histopatológico com imunohistoquímica confirmaram o diagnóstico de hemangioendotelioma cutâneo kaposiforme. Realizou-se ressecção até a fáscia com recidiva, sendo necessária reabordagem e ressecção até o periósteo com a reconstrução com retalho plantar e enxerto de pele, sem recidiva no seguimento de 15 anos. Os autores chamam a atenção para a ressecção ampla de margens profundas e laterais para controle do crescimento tumoral.

Introduction: Kaposiform cutaneous hemangioendothelioma (HEK) is a rare locally aggressive vascular tumor, seen mainly in newborns and children. It has a prevalence of 0.91 cases per 100,000 children, being most common in the extremities. The treatment of choice is total resection; however, it is often not possible due to the lesion's extent and association with the Kasabach-Merritt phenomenon. Objectives: To describe the evolution of a rare tumor in the plantar region of a child, correlating the radiological, surgical, and histopathological findings. Methods: The authors report the case of a boy admitted at the age of five with a recurrent painful plantar skin lesion. In the magnetic resonance examination (NMR), he presented a lesion in the posterior plantar region measuring 3cmx2cm, superficial to the plantar fascia. In the biopsy examination, he revealed kaposiform hemangioendothelioma without association with the Kasabach-Merritt phenomenon. He underwent a surgical procedure for excision and presented recurrence after six months. A new broad resection, reconstruction with a plantar flap, and partial skin graft were performed, obtaining free margins, with no recurrence in the 15-year follow-up. Conclusion: Clinical findings suggested plantar fibromatosis, NMR helped in delimiting the tumor, and histopathological examination with immunohistochemistry confirmed the diagnosis of kaposiform cutaneous hemangioendothelioma. Resection was performed up to the fascia with recurrence, requiring re-approach and resection to the periosteum with reconstruction using a plantar flap and skin graft, without recurrence after 15 years. The authors call attention to the wide resection of deep and lateral margins to control tumor growth.

Development and Validation of a Safety Scale Perceived by the Witness of Prehospital Emergency Care.

OBJECTIVE: The aim of the study was to design and validate a new tool to measure the security perceived by witnesses of patient care and hospital transfers, after requesting urgent assistance via the "061" phone number. METHODS: This is a descriptive observational, cross-sectional, design, and validation study of a scale conducted by telephone interview. Witnesses of urgent assistance and transfers by prehospital emergency medical services in the province of Cadiz, in the south of Spain, were the subjects of study. A questionnaire was designed after focus groups with patients, witnesses, and professionals. It consisted of 10 items, with Likert-type answers, and a range of 0 to 50 points. In addition to basic criteria (frequency of endorsement and ability to discriminate between groups), their validity (content and construct) and reliability (stability and homogeneity) were evaluated. Stability was evaluated by test-retest and homogeneity by means of two properties: internal consistency of items (corrected item-scale correlation coefficient) and internal consistency of the scale (Cronbach α coefficient). RESULTS: A total of 849 questionnaires were obtained, with scores between 0 and 50 points, with an average of 47.31 (median of 50). The exploratory factor analysis detected a component that explained 61.1% of the total variance. The intraclass correlation coefficient was 0.933 with 95% confidence interval between 0.900 and 0.954. The corrected item-scale correlation coefficient was greater than 0.596, and the Cronbach α coefficient was 0.927 (95% confidence interval, 0.919-0.934). CONCLUSIONS: The ESPT10 Witness Perceived Safety Scale is valid and reliable for quantifying the safety perception of witnesses of emergency assistance and transfers.