Description of a rare case of nodular fasciitis of the apical aspect of the upper buccal sulcus

This report describes a rare case of nodular fasciitis (NF) of the oral cavity, discussing the clinical, histological, and immunohistochemical characteristics. Histopathologic diagnosis of this type of lesion can be challenging due to its differential diagnosis, which principally includes sarcoma. The patient presented with a painless, well-defined nodule, reported as increasing in size, located at the apical aspect of the upper left buccal sulcus. Histologically, the lesion revealed spindle cell proliferation arranged in fascicles, while immunohistochemistry demonstrated positivity for smooth muscle actin. Eight months after complete surgical excision, no signs of local recurrence have been observed.Department of Oral Pathology, Sao Leopoldo Mandic Institute and Research Center, Rua José Rocha Junqueira13, Ponte Preta, 13045-755 Campinas, SP, BrazilDepartment of Pathology, Escola Paulista de Medicina, Rua Botucatu 740, Vila Clementino, 04023-900 Sao Paulo, SP, BrazilDepartment of Pathology, Escola Paulista de Medicina, Rua Botucatu 740, Vila Clementino, 04023-900 Sao Paulo, SP, BrazilWeb of Scienc

Transmission of signals using white LEDs for VLC applications

In this paper an integrated wavelength optical filter and photodetector for Visible Light Communication (VLC) is used. The proposed application uses indoor warm light lamps lighting using ultra-bright white LEDs pulsed at frequencies higher than the ones perceived by the human eye. The system was analyzed using two different types the white LEDs, namely, phosphor and trichromatic based LEDs. The signals were transmitted into free space and the generated photocurrent was measured by the pin-pin photodetector based on a-SiC:H/a-Si:H. This device operates in the visible spectrum, allowing thus the detection of the pulsed white light emitted by the LEDs. However, as it also works as a visible optical filter with controlled wavelength sensitivity through the use of adequate optical biasing light, it is able to detect different wavelengths. This feature allows the detection of the individual components of the tri-chromatic white LED, which enlarges the amount of information transmitted by this type of white LED, when compared to the phosphor based LED. A capacitive optoelectronic model supports the experimental results and the physical operation of the device. A numerical simulation is presented.info:eu-repo/semantics/publishedVersio

Índice de risco cirúrgico e infecção de ferida operatória em puérperas submetidas a cesarianas.

Backgound and Objectives: Considering the use of active surveillance assists in infection identification and the need for studies that use Surgical Risk Index (SRI) for assessment of Surgical Site Infection (SSI) in cesareans, this study aims to determine the incidence of SSI and analyze the applicability of SRI in the prediction of SSI in women in the postpartum period after being submitted to a cesarean section at a university hospital between April 2012 and March of 2013. Methods: Prospective cohort study. Information notifying SSI by active surveillance was collected daily from the medical records. After hospital discharge, the mothers were contacted through telephone calls to identify infection criteria within 30 days after the cesarean. Descriptive and comparative analyses were performed. The chi-square test was used to compare groups. Results: 737 cesareans were performed. Telephone contact was achieved with 507 (68.8%) women up to 30 days postpartum, with loss of follow-up of 230 cases (31.2%). The medical consultation in the post-partum period occurred with 188 (37.08%) women, with whom telephone contact was obtained, on average, 17.28 days (SD=8.39) after delivery. It was verified that 21 patients met the criteria for SSI, with a 4.14% rate. A total of 12 cases (57.1%) were classified as superficial SSI, 5 (23.8%) as deep and 4 (19.1%) as infection of organs and cavities. The SRI and its risk variables were not associated with SSI in patients submitted to cesarean sections. Conclusion: The SRI and the risk variables included in this index were not associated to SSI in patients submitted to cesarean sections. KEYWORDS: Cesarean Section; Surgical Wound Infection; Epidemiological Surveillance; Infection Control; Risk Index; Disease Notification.Justificativa e Objetivos: Tendo em vista que o emprego de vigilância ativa colabora na identificação de infecção e a necessidade de estudos que utilizem o Índice de Risco Cirúrgico (IRC) para avaliação de Infecção de Ferida Cirúrgica (IFC) em cesarianas este estudo objetiva determinar a incidência de IFC e analisar a aplicabilidade do IRC na predição das IFC em puérperas submetidas à cesariana em hospital universitário entre abril de 2012 e março de 2013. Métodos: Estudo de coorte prospectivo concorrente. Informações de notificação das IFC por vigilância ativa foram coletadas diariamente nos prontuários. Após alta hospitalar, as puérperas eram contatadas por ligações telefônicas para identificação de critérios de infecção até 30 dias após a cesariana. Análises descritivas e comparativas foram conduzidas. Para comparação dos grupos foi utilizado teste de Qui-quadrado. Resultados: Foram realizadas 737 cesarianas. Contato telefônico foi conseguido com 507 (68,8%) puérperas até 30 dias pós-parto, com perda de seguimento de 230 casos (31,2%). A consulta médica no puerpério ocorreu em 188 (37,08%) mulheres com quem foi obtido contato telefônico, em média, 17,28 dias (± 8,39) após o parto. Verificou-se que 21 casos preencheram critérios para IFC, taxa de 4,14%. Classificou-se 12 (57,1%) casos como infecção de ferida cirúrgica superficial, 5 (23,8%) como profunda e 4 (19,1%) de órgãos e cavidades. O IRC e suas variáveis de risco não foram associados à IFC em pacientes submetidas a cesarianas. Conclusão: O IRC e as variáveis de risco incluídas nesse índice não foram associados à IFC em pacientes submetidas a cesarianas. DESCRITORES: Cesárea; Infecção da Ferida Operatória; Vigilância epidemiológica; Controle de Infecções; Índice de Risco; Notificação de doenças

Fortalecer as atividades de informação e vigilância epidemiológica é essencial e urgente para reduzir a força de transmissão do SARS-CoV-2

Situação: O preprint foi submetido para publicação em um periódico

Risk of SARS-CoV-2 infection among front-line healthcare workers in Northeast Brazil : a respondent-driven sampling approach

Objectives We assessed the prevalence of SARS-CoV-2 infection, personal protective equipment (PPE) shortages and occurrence of biological accidents among front-line healthcare workers (HCW). Design, setting and participants Using respondent-driven sampling, the study recruited distinct categories of HCW attending suspected or confirmed patients with COVID-19 from May 2020 to February 2021, in the Recife metropolitan area, Northeast Brazil. Outcome measures The criterion to assess SARS-CoV-2 infection among HCW was a positive self-reported PCR test. Results We analysed 1525 HCW: 527 physicians, 471 registered nurses, 263 nursing assistants and 264 physical therapists. Women predominated in all categories (81.1%; 95% CI: 77.8% to 84.1%). Nurses were older with more comorbidities (hypertension and overweight/obesity) than the other staff. The overall prevalence of SARS-CoV-2 infection was 61.8% (95% CI: 55.7% to 67.5%) after adjustment for the cluster random effect, weighted by network, and the reference population size. Risk factors for a positive RT-PCR test were being a nursing assistant (OR adjusted: 2.56; 95% CI: 1.42 to 4.61), not always using all recommended PPE while assisting patients with COVID-19 (OR adj: 2.15; 95% CI: 1.02 to 4.53) and reporting a splash of biological fluid/respiratory secretion in the eyes (OR adj: 3.37; 95% CI: 1.10 to 10.34). Conclusions This study shows the high frequency of SARS-CoV2 infection among HCW presumably due to workplace exposures. In our setting, nursing assistant comprised the most vulnerable category. Our findings highlight the need for improving healthcare facility environments, specific training and supervision to cope with public health emergencies

Toxicogenetic study of omeprazole and the modulatory effects of retinol palmitate and ascorbic acid on Allium cepa

© 2018 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license: http://creativecommons.org/licenses/by-nc-nd/4.0/ This author accepted manuscript is made available following 12 month embargo from date of publication (May 2018) in accordance with the publisher’s archiving policyOmeprazole (OME) is a proton pump inhibitor used for the treatment of various gastric and intestinal disease; however, studies on its effects on the genetic materials are still restricted. The present study aimed to evaluate possible toxicogenic effects of OME in Allium cepa meristems with the application of cytogenetic biomarkers for DNA damage, mutagenic, toxic and cytotoxic effects. Additionally, retinol palmitate (RP) and ascorbic acid (AA) were also co-treated with OME to evaluate possible modulatory effects of OME-induced cytogenetic damages. OME was tested at 10, 20 and 40 μg/mL, while RP and AA at 55 μg/mL and 352.2 μg/mL, respectively. Copper sulphate (0.6 μg/mL) and dechlorinated water were used as positive control and negative control, respectively. The results suggest that OME induced genotoxicity and mutagenicity in A. cepa at all tested concentrations. It was noted that cotreatment of OME with the antioxidant vitamins RP and/or AA significantly (p < 0.05) inhibited and/or modulated all toxicogenic damages induced by OME. These observations demonstrate their antigenotoxic, antimutagenic, antitoxic and anticitotoxic effects in A. cepa. This study indicates that application of antioxidants may be useful tools to overcome OME-induced toxic effects

Multi-ancestry GWAS of the electrocardiographic PR interval identifies 202 loci underlying cardiac conduction

The electrocardiographic PR interval reflects atrioventricular conduction, and is associated with conduction abnormalities, pacemaker implantation, atrial fibrillation (AF), and cardiovascular mortality. Here we report a multi-ancestry (N=293,051) genome-wide association meta-analysis for the PR interval, discovering 202 loci of which 141 have not previously been reported. Variants at identified loci increase the percentage of heritability explained, from 33.5% to 62.6%. We observe enrichment for cardiac muscle developmental/contractile and cytoskeletal genes, highlighting key regulation processes for atrioventricular conduction. Additionally, 8 loci not previously reported harbor genes underlying inherited arrhythmic syndromes and/or cardiomyopathies suggesting a role for these genes in cardiovascular pathology in the general population. We show that polygenic predisposition to PR interval duration is an endophenotype for cardiovascular disease, including distal conduction disease, AF, and atrioventricular pre-excitation. These findings advance our understanding of the polygenic basis of cardiac conduction, and the genetic relationship between PR interval duration and cardiovascular disease. On the electrocardiogram, the PR interval reflects conduction from the atria to ventricles and also serves as risk indicator of cardiovascular morbidity and mortality. Here, the authors perform genome-wide meta-analyses for PR interval in multiple ancestries and identify 141 previously unreported genetic loci.Peer reviewe