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1.
An Acad Bras Cienc ; 96(1): e20200570, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38451591

RESUMEN

In this study, videothermometry's application in detecting mammary tumors in dogs is explored in-depth. The research hypothesizes that this technique can effectively identify cancerous tissues during surgery by analyzing thermal patterns. The methodology involved comparing thermal imaging results from dogs with palpable mammary nodules against a control group, focusing on capturing real-time thermal patterns. Results were significant, showing distinct thermal patterns in carcinomas. This indicates videothermometry's capability in accurately identifying micro metastases and differentiating between neoplastic and non-neoplastic changes. The study concludes that videothermometry has considerable potential in enhancing surgical precision, especially in tumor resection and safety margin definition, but emphasizes the need for further research to thoroughly understand the thermal signatures of various mammary tumors in dogs.


Asunto(s)
Neoplasias Mamarias Animales , Termometría , Animales , Perros , Neoplasias Mamarias Animales/diagnóstico por imagen , Termometría/veterinaria
2.
Sensors (Basel) ; 23(21)2023 Oct 25.
Artículo en Inglés | MEDLINE | ID: mdl-37960411

RESUMEN

Drones are increasingly capturing the world's attention, transcending mere hobbies to revolutionize areas such as engineering, disaster aid, logistics, and airport protection, among myriad other fascinating applications. However, there is growing concern about the risks that they pose to physical infrastructure, particularly at airports, due to potential misuse. In recent times, numerous incidents involving unauthorized drones at airports disrupting flights have been reported. To solve this issue, this article introduces an innovative deep learning method proposed to effectively distinguish between drones and birds. Evaluating the suggested approach with a carefully assembled image dataset demonstrates exceptional performance, surpassing established detection systems previously proposed in the literature. Since drones can appear extremely small compared to other aerial objects, we developed a robust image-tiling technique with overlaps, which showed improved performance in the presence of very small drones. Moreover, drones are frequently mistaken for birds due to their resemblances in appearance and movement patterns. Among the various models tested, including SqueezeNet, MobileNetV2, ResNet18, and ResNet50, the SqueezeNet model exhibited superior performance for medium area ratios, achieving higher average precision (AP) of 0.770. In addition, SqueezeNet's superior AP scores, faster detection times, and more stable precision-recall dynamics make it more suitable for real-time, accurate drone detection than the other existing CNN methods. The proposed approach has the ability to not only detect the presence or absence of drones in a particular area but also to accurately identify and differentiate between drones and birds. The dataset utilized in this research was obtained from a real-world dataset made available by a group of universities and research institutions as part of the 2020 Drone vs. Bird Detection Challenge. We have also tested the performance of the proposed model on an unseen dataset, further validating its better performance.

3.
J Oral Rehabil ; 50(11): 1362-1368, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37422904

RESUMEN

BACKGROUND: Sleep bruxism (SB) and obstructive sleep apnea syndrome (OSAS) are two sleep-related conditions that have been associated with significantly conflicting results in literature. Understanding the prevalence of bruxism among OSA patients is crucial for identifying possible comorbidities and optimising treatment strategies. OBJECTIVE: This systematic review aimed at analysing the prevalence of SB in OSAS sufferers and understanding the association between the two. METHODS: Five online databases were searched for relevant articles in accordance with the PRISMA guidelines for conduction of systematic reviews. Studies reporting the prevalence of bruxism in OSAS patients and diagnosed through clinical assessments or polysomnography were included. Data extraction and quality assessment were performed independently by two reviewers. Methodological quality of the included studies was assessed using Risk of Bias In Non-randomised Studies of Interventions (ROBINS-I). RESULTS: A thorough search of literature yielded only two studies were eligible for this review. SB was found to be significantly present in the OSAS group. Despite methodological variations, the majority of studies reported higher rates of bruxism in OSAS patients compared to the general population or control groups. CONCLUSION: The results of this systematic review point to a significant association between bruxism and obstructive sleep apnea. Further research is required to determine a more precise prevalence rate and investigate the potential therapeutic implications of the bruxism-OSAS association that uses a standardised assessment techniques and larger sample sizes.

4.
An Acad Bras Cienc ; 94(4): e20201107, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35830069

RESUMEN

Eretmochelys imbricata (hawksbill turtle) is classified as a critically endangered species at world level; in Brazil, it is listed among the threatened species. Spirorchiids are parasites of the circulatory system of chelonians which may cause serious lesions in the various tissues of the host due to deposition of eggs in the bloodstream. In this context, the aim of the present study was to describe the pathology caused by spirorchiid eggs in E. imbricata from the Brazilian over a five year period. A total of 29 animals were analyzed, of which nine (31%) presented lesions associated to spirorchiids eggs. The lesions were: granulomatous enteritis in six (66.66%), granulomatous splenitis in five (55.55%), granulomatous hepatitis in three (33.33%), granulomatous pneumonia in three (33.33%), granulomatous pancreatitis in two (22.22%), and granulomatous adrenalitis in one specimen (11.11%). Concluded the main lesion in Eretmochelys imbricata was giant-cell granulomatous inflammatory reaction to the parasite's eggs. Animals exhibiting poor physical health were more susceptible to presenting such lesions.


Asunto(s)
Tortugas , Animales , Brasil , Tortugas/parasitología
5.
Nanotechnology ; 32(19): 195706, 2021 May 07.
Artículo en Inglés | MEDLINE | ID: mdl-33545705

RESUMEN

Zinc oxide (ZnO) nanorod thin films were prepared by CBD onto glass and FTO/glass substrates. Silver (Ag) nanoparticles were synthesized on the surface of the prepared ZnO nanorod thin films using electrochemical methods. The scanning electron microscopy images of the Ag/ZnO/glass core/shell nanostructure confirmed that the average particles size is 20 nm while it was 41 nm for Ag NPs that synthesized onto ZnO/FTO NRs. The photocatalytic activity of the prepared Ag/ZnO core/shell nanostructure was studied by analyzing the degradation of methylene blue (MB) dye under visible light. Various pH values (6 and 10) and exposure time (30-240) min were controlled to investigate the photocatalytic activity of as-prepared Ag/ZnO core/shell nanostructure and that annealed at 200 °C and 300 °C for 1 h. It was observed that when the pH was 6, the degradation rate increased with the annealing temperature and irradiation time reaching 51% at the annealing temperature of 300 °C and exposure time of 240 min. In other hands, when the pH was 10, and the sample was annealed at 200 °C, it showed a good degradation rate of 100% at the irradiation time of 90 min. By contrast, the sample annealed at 300 °C required 180 min to degrade the MB dye completely. The photoelectrochemical cell measurement based on photocurrent density revealed a slight response to light. Cycle voltammetry (CV) measurement was conducted, and the CV curves of the Ag/ZnO core/shell electrodes indicated nonfaradaic and pseudocapacitance behavior. The electrodes showed nearly rectangular CV curves, which indicated the dominance of the nonfaradaic capacitance behavior. The specific capacitance of the electrodes remained at approximately 99%. Mott-Schottky analysis revealed that the semiconductor was an n-type with dependence on flat band potential V FB deviation in the negative direction.

6.
Nanotechnology ; 32(25)2021 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-33556921

RESUMEN

In this work, synthesis of graphene oxide (GO) and reduced graphene oxide (rGO) was realized through a modified Hummers route. Different concentrations (5 and 10 wt%) of Ag were doped in MoS2and rGO using a hydrothermal technique. Synthesized Ag-MoS2and Ag-rGO were evaluated through XRD that confirmed the hexagonal structure of MoS2along with the transformation of GO to Ag-rGO as indicated by a shift in XRD peaks while Mo-O bonding and S=O functional groups were confirmed with FTIR. Morphological information of GO and formation of MoS2nanopetals as well as interlayer spacing were verified through FESEM and HRTEM respectively. Raman analysis was employed to probe any evidence regarding defect densities of GO. Optical properties of GO, MoS2, Ag-rGO, and Ag-MoS2were visualized through UV-vis and PL spectroscopy. Prepared products were employed as nanocatalysts to purify industrial wastewater. Experimental results revealed that Ag-rGO and Ag-MoS2showed 99% and 80% response in photocatalytic activity. Besides, the nanocatalyst (Ag-MoS2and Ag-rGO) exhibited 6.05 mm inhibition zones againstS. aureusgram positive (G+) and 3.05 mm forE. coligram negative (G-) in antibacterial activity. To rationalize biocidal mechanism of Ag-doped MoS2NPs and Ag-rGO,in silicomolecular docking study was employed for two enzymes i.e.ß-lactamase and D-alanine-D-alanine ligase B (ddlB) from cell wall biosynthetic pathway and enoyl-[acylcarrier-protein] reductase (FabI) from fatty acid biosynthetic pathway belonging toS. aureus. The present study provides evidence for the development of cost-effective, environment friendly and viable candidate for photocatalytic and antimicrobial applications.


Asunto(s)
Antibacterianos , Grafito/química , Nanoestructuras/química , Plata , Purificación del Agua/métodos , Antibacterianos/química , Antibacterianos/metabolismo , Antibacterianos/farmacología , Bacterias/efectos de los fármacos , Disulfuros/química , Nanopartículas del Metal/química , Simulación del Acoplamiento Molecular , Molibdeno/química , Fotólisis , Plata/química , Plata/metabolismo , Plata/farmacología , Aguas Residuales
7.
J Appl Microbiol ; 130(3): 971-981, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32743931

RESUMEN

AIMS: This study compared the bag-mediated filtration system (BMFS) and standard WHO two-phase separation methods for poliovirus (PV) environmental surveillance, examined factors impacting PV detection and monitored Sabin-like (SL) PV type 2 presence with withdrawal of oral polio vaccine type 2 (OPV2) in April 2016. METHODS AND RESULTS: Environmental samples were collected in Nairobi, Kenya (Sept 2015-Feb 2017), concentrated via BMFS and two-phase separation methods, then assayed using the WHO PV isolation algorithm and intratypic differentiation diagnostic screening kit. SL1, SL2 and SL3 were detected at higher rates in BMFS than two-phase samples (P < 0·05). In BMFS samples, SL PV detection did not significantly differ with volume filtered, filtration time or filter shipment time (P > 0·05), while SL3 was detected less frequently with higher shipment temperatures (P = 0·027). SL2 was detected more frequently before OPV2 withdrawal in BMFS and two-phase samples (P < 1 × 10-5 ). CONCLUSIONS: Poliovirus was detected at higher rates with the BMFS, a method that includes a secondary concentration step, than using the standard WHO two-phase method. SL2 disappearance from the environment was commensurate with OPV2 withdrawal. SIGNIFICANCE AND IMPACT OF THE STUDY: The BMFS offers comparable or improved PV detection under the conditions in this study, relative to the two-phase method.


Asunto(s)
Monitoreo del Ambiente/métodos , Filtración/métodos , Poliovirus/aislamiento & purificación , Filtración/normas , Humanos , Kenia/epidemiología , Poliomielitis/epidemiología , Poliomielitis/virología , Vacuna Antipolio Oral/aislamiento & purificación , Serogrupo , Aguas del Alcantarillado/virología
8.
Emerg Infect Dis ; 26(12): 3002-3006, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-33219805

RESUMEN

Acute febrile neurological infection cases in southern Iraq (N = 212) were screened for lymphocytic choriomeningitis virus (LCMV). Two LCMV IgM-positive serum samples and 2 cerebrospinal fluid samples with phylogenetically distinct LCMV strains were found. The overall LCMV seroprevalence was 8.8%. LCMV infections are common and associated with acute neurological disease in Iraq.


Asunto(s)
Coriomeningitis Linfocítica , Virus de la Coriomeningitis Linfocítica , Anticuerpos Antivirales , Humanos , Irak/epidemiología , Coriomeningitis Linfocítica/epidemiología , Estudios Seroepidemiológicos
9.
Epilepsy Behav ; 111: 107241, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32590182

RESUMEN

New imaging technologies have advanced our ability to localize the epileptogenic zone in patients with epilepsy. As a result of the constant improvement of the image quality, magnetic resonance imaging (MRI) has become the most important ancillary tool in the management of patients with epilepsy. Magnetic resonance imaging for the evaluation of patients with epilepsy should be done using a special temporal lobe protocol and read by physicians experienced with the findings in patients with epilepsy. On the other hand, in the healthy populations, incidental structural brain abnormalities have been reported in 18% of people. Incidental, subtle, or unexpected structural brain abnormalities have also been reported in many patients who were investigated because of having seizures. In the current narrative review, we will discuss some of these instances, where structural brain abnormalities are discovered unexpectedly, are subtle (but important) and/or may be considered as incidental.


Asunto(s)
Encéfalo/diagnóstico por imagen , Imagen por Resonancia Magnética/métodos , Convulsiones/diagnóstico por imagen , Adulto , Encéfalo/patología , Epilepsia/diagnóstico por imagen , Epilepsia/patología , Epilepsia del Lóbulo Temporal/diagnóstico por imagen , Epilepsia del Lóbulo Temporal/patología , Femenino , Humanos , Masculino , Neuroimagen/métodos , Convulsiones/patología , Lóbulo Temporal/patología
10.
Epidemiol Infect ; 147: e136, 2019 01.
Artículo en Inglés | MEDLINE | ID: mdl-30869051

RESUMEN

Recent infection testing algorithms (RITA) for HIV combine serological assays with epidemiological data to determine likely recent infections, indicators of ongoing transmission. In 2016, we integrated RITA into national HIV surveillance in Ireland to better inform HIV prevention interventions. We determined the avidity index (AI) of new HIV diagnoses and linked the results with data captured in the national infectious disease reporting system. RITA classified a diagnosis as recent based on an AI < 1.5, unless epidemiological criteria (CD4 count <200 cells/mm3; viral load <400 copies/ml; the presence of AIDS-defining illness; prior antiretroviral therapy use) indicated a potential false-recent result. Of 508 diagnoses in 2016, we linked 448 (88.1%) to an avidity test result. RITA classified 12.5% of diagnoses as recent, with the highest proportion (26.3%) amongst people who inject drugs. On multivariable logistic regression recent infection was more likely with a concurrent sexually transmitted infection (aOR 2.59; 95% CI 1.04-6.45). Data were incomplete for at least one RITA criterion in 48% of cases. The study demonstrated the feasibility of integrating RITA into routine surveillance and showed some ongoing HIV transmission. To improve the interpretation of RITA, further efforts are required to improve completeness of the required epidemiological data.


Asunto(s)
Algoritmos , Monitoreo Epidemiológico , Infecciones por VIH/diagnóstico , Pruebas Serológicas/métodos , Afinidad de Anticuerpos , Recuento de Linfocito CD4 , Anticuerpos Anti-VIH/sangre , Humanos , Técnicas para Inmunoenzimas/métodos , Irlanda , Carga Viral
11.
World J Surg ; 42(5): 1239-1247, 2018 05.
Artículo en Inglés | MEDLINE | ID: mdl-29043408

RESUMEN

BACKGROUND: This project explores the costs of cleft lip and/or palate surgeries in Palestine and Sudan, two low- and middle-income countries (LMIC), in the Middle East. Our purpose is to examine the veracity of advertisements from international cleft organizations claiming that "250 US dollars (USD) covers the cost of a single cleft surgery." We hypothesize that the actual cost of surgery is greater than 250 USD. METHODS: Costs for each cleft surgery were organized broadly into 5 categories: hospital charges, personnel (time and money spent for health professionals to travel to LMIC, including lost wages), tests, consumables, and reusables. Each item was priced at market value during the time of data collection. Following itemization of actual costs, we compared the costs per cleft surgery among four surgical practice models: (1) visiting international surgical teams, (2) visiting international surgeon working with local teams, (3) local teams working at government hospitals, and (4) local teams working at private hospitals. RESULTS: Our results suggest that 250 USD is an underestimate of actual costs per cleft surgery in all models. The most expensive model in both Palestine and Sudan was the first model, visiting international teams performing all team functions; the cheapest surgical model in both countries was a local team working at government hospitals. The largest cost for any of these models is travel and lost wages for international team members. Eliminating this single cost (travel) decreases overall cost tremendously, but still does not approach the advertised cost of 250 USD. CONCLUSIONS: We conclude that 250 USD underestimates the actual costs to perform a single cleft surgery in Palestine and Sudan. If international cleft organizations are genuinely committed to creating sustainable international cleft programs, they should focus exclusively on training local professionals to perform surgery in hospitals of their own choosing.


Asunto(s)
Labio Leporino/economía , Labio Leporino/cirugía , Fisura del Paladar/economía , Fisura del Paladar/cirugía , Costos y Análisis de Costo , Modelos Económicos , Hospitales Privados , Hospitales Públicos , Humanos , Misiones Médicas , Medio Oriente
12.
Mol Plant Microbe Interact ; 30(9): 701-709, 2017 09.
Artículo en Inglés | MEDLINE | ID: mdl-28517960

RESUMEN

Bacterial speck caused by Pseudomonas syringae has historically been controlled by the Pto/Prf gene cluster. Emerging strains like P. syringae pv. tomato race 1 overcome resistance conferred by Pto/Prf, and can cause serious crop loss under appropriate environmental conditions. We developed a rapid assay to screen wild tomato seedlings for resistance to P. syringae pv. tomato race 1. We established the seedling resistance assay using the well-characterized P. syringae pv. tomato race 0 strain, DC3000, which is recognized in tomato cultivars carrying Pto/Prf (PtoR) and causes disease in isogenic lines lacking this cluster (PtoS). We optimized infectious conditions for P. syringae on tomato seedlings and demonstrated that tomato seedlings respond like adult tomato plants in critical measures of susceptibility and immunity, including the hypersensitive response, rapid ion leakage, restricted bacterial proliferation, and phenotypic resistance. After establishing infectious conditions for P. syringae pv. tomato race 1 on tomato seedlings, we screened 96 wild accessions and identified two accessions with strong P. syringae pv. tomato race 1 resistance, Solanum neorickii LA1329 and S. habrochaites LA1253, which are also resistant to bacterial infection as adult plants. This rapid high throughput seedling assay has many advantages, including reduced plant growth time and large sample sizes, and will allow for large-scale screening of resistance in tomato.


Asunto(s)
Bioensayo/métodos , Resistencia a la Enfermedad , Pseudomonas syringae/fisiología , Plantones/inmunología , Plantones/microbiología , Solanum lycopersicum/inmunología , Solanum lycopersicum/microbiología , Fenotipo , Enfermedades de las Plantas/inmunología , Enfermedades de las Plantas/microbiología
13.
Spinal Cord ; 51(3): 245-51, 2013 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-23184024

RESUMEN

STUDY DESIGN: Repeated cross-sectional study. OBJECTIVES: To compare the effects of rolling resistances (RRs) on handrim kinetic intensity at the non-dominant upper limb and on handrim kinetic symmetry during wheelies performed by manual wheelchair users (MWUs) with spinal cord injury (SCI). SETTING: Pathokinesiology Laboratory. METHODS: Sixteen individuals with SCI who were able to perform wheelies participated in this study. During a laboratory assessment, participants randomly performed wheelies on four RRs: natural high-grade composite board, 5-cm thick soft foam, 5-cm thick memory foam, and with the rear wheels blocked by wooden blocks. Four trials were conducted for each of the RRs. Participant's wheelchair was equipped with instrumented wheels to record handrim kinetics, whereas the movements of the wheelchair were recorded with a motion analysis system. RESULTS: The net mean and peak total forces, including its tangential and mediolateral components, were greater during take-off compared with the other phases of the wheelie, independently of RR. During take-off, the greatest net mean and peak total and tangential forces were reached with the wheels blocked. Symmetrical tangential and mediolateral force intensities were applied at the dominant and non-dominant handrims. CONCLUSION: Wheelies performed on low or moderate density foam generate similar forces at the handrim than on a natural surface and significantly less forces than with the wheels blocked. Hence, when teaching individuals with an SCI to perform a stationary wheelie, the use of low or moderate density foam represents a valuable alternative for minimizing upper limb effort and may also optimize quasi-static postural steadiness.


Asunto(s)
Desempeño Psicomotor/fisiología , Traumatismos de la Médula Espinal/fisiopatología , Traumatismos de la Médula Espinal/rehabilitación , Silla de Ruedas , Adulto , Fenómenos Biomecánicos/fisiología , Estudios Transversales , Femenino , Humanos , Cinética , Masculino , Persona de Mediana Edad , Traumatismos de la Médula Espinal/diagnóstico , Adulto Joven
14.
Clin Oncol (R Coll Radiol) ; 35(12): 773-786, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37852814

RESUMEN

Stereotactic ablative body radiotherapy (SABR) consists of delivering high doses of ionising radiation, typically across three to eight fractions with high precision and conformity. SABR has become increasingly commonplace throughout the last quarter of a century and is offered for the treatment of various primary and metastatic tumour types. Delivering SABR in a single fraction has arisen as an appealing possibility for several reasons. These include fewer hospital visits, greater patient convenience, improved sustainability and lower costs. However, these factors must be balanced against considerations such as toxicity, side-effects and, most importantly, progression-free and overall survival. In this review we seek to analyse the results of studies looking at the efficacy of single-fraction SABR for lung, prostate, renal and pancreas primary tumours, as well as oligometastases. The tumour type to be most widely treated with single-fraction SABR is lung, but its remit continues to expand. We also look at the biological rationale underpinning SABR and how this can be extended to single-fraction regimens. Finally, we turn our attention towards the future directions of SABR and specifically single-fraction regimens. These include the possibility of combining SABR with immunotherapy and technological advances in the field, which could serve to expand the scope of SABR. We conclude by summarising the current clinical studies of single-fraction SABR.


Asunto(s)
Neoplasias Pancreáticas , Radiocirugia , Masculino , Humanos , Radiocirugia/métodos
15.
Eur Rev Med Pharmacol Sci ; 27(13): 6401-6413, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37458660

RESUMEN

OBJECTIVE: Recently, lumpy skin disease (LSD) has been spread over the Asian, European, and Middle Eastern regions making it a significant hazard to the chain of cattle production, milk production, and human milk consumption, requiring prompt attention. Lumpy skin disease virus has high morbidity and low fatality rates, but its infections have led to terrible economic and agricultural consequences. Although live-attenuated vaccines have been commercialized, farmers in different regions have not taken them well because of the allergic responses against the vaccines. The study aims to develop an mRNA-based vaccine candidate for LSDV, using immunoinformatic approaches to minimize allergenicity and homology while maximizing immunogenic potential. MATERIALS AND METHODS: The study used extensive immunoinformatic approaches to shortlist five proteins from the LSDV genome that belong to the transmembrane region and are crucial in early viral interaction with host cells. The B-cell and T-cell-specific epitopes were chosen based on non-allergenicity, antigenicity, non-homology, surface accessibility, and lower IC50 inhibition values. The construct's stability, hydrophilicity, and antigenic potential were analyzed using the instability index, Grand Average of Hydropathicity (GRAVY) index, and antigenicity, respectively. RESULTS: We selected a total of 34 epitopes, consisting of 12 B-cell-specific epitopes and 22 T-cell-specific epitopes. These epitopes were chosen based on their characteristics such as non-allergenicity, antigenicity, non-homology, surface accessibility, and lower IC50 inhibition values. Specifically, 11 epitopes were selected for Major Histocompatibility Complex-I, and another 11 epitopes were chosen for Major Histocompatibility Complex-II. The inclusion of the RS09 adjuvant enhanced the immunogenic potential of the vaccine. The instability index was found to be 38.60. Additionally, the GRAVY index, indicating hydrophilicity, was calculated as -0.151. Furthermore, the antigenicity value of 0.6073 confirmed its potential to elicit an immune response. Further supporting its immunogenic potential, strong immune stimulation was observed, with IgM+IgG titers reaching 6,000 (arbitrary units) and IFNg titers measuring 400,000 ng/mL. These results provide additional evidence of the vaccine's ability to stimulate a robust immune response. CONCLUSIONS: The study results indicate that the developed mRNA-based vaccine candidate for LSDV has high immunogenic potential and could serve as an effective alternative to live-attenuated vaccines. Further experimental validations are required to test its efficacy. The study also highlights the potential of the One-Health approach to tackle non-zoonotic diseases that have significant consequences for the environment and humanity.


Asunto(s)
Virus de la Dermatosis Nodular Contagiosa , Salud Única , Vacunas Virales , Animales , Bovinos , Humanos , Virus de la Dermatosis Nodular Contagiosa/genética , Vacunas Atenuadas/genética , Vacunas Virales/genética , Epítopos , ARN Mensajero/genética
16.
JCI Insight ; 8(22)2023 Nov 22.
Artículo en Inglés | MEDLINE | ID: mdl-37815863

RESUMEN

Ventricular arrhythmias (VAs) in heart failure are enhanced by sympathoexcitation. However, radiotracer studies of catecholamine uptake in failing human hearts demonstrate a proclivity for VAs in patients with reduced cardiac sympathetic innervation. We hypothesized that this counterintuitive finding is explained by heterogeneous loss of sympathetic nerves in the failing heart. In a murine model of dilated cardiomyopathy (DCM), delayed PET imaging of sympathetic nerve density using the catecholamine analog [11C]meta-Hydroxyephedrine demonstrated global hypoinnervation in ventricular myocardium. Although reduced, sympathetic innervation in 2 distinct DCM models invariably exhibited transmural (epicardial to endocardial) gradients, with the endocardium being devoid of sympathetic nerve fibers versus controls. Further, the severity of transmural innervation gradients was correlated with VAs. Transmural innervation gradients were also identified in human left ventricular free wall samples from DCM versus controls. We investigated mechanisms underlying this relationship by in silico studies in 1D, 2D, and 3D models of failing and normal human hearts, finding that arrhythmogenesis increased as heterogeneity in sympathetic innervation worsened. Specifically, both DCM-induced myocyte electrical remodeling and spatially inhomogeneous innervation gradients synergistically worsened arrhythmogenesis. Thus, heterogeneous innervation gradients in DCM promoted arrhythmogenesis. Restoration of homogeneous sympathetic innervation in the failing heart may reduce VAs.


Asunto(s)
Cardiomiopatía Dilatada , Humanos , Ratones , Animales , Cardiomiopatía Dilatada/diagnóstico por imagen , Corazón , Miocardio , Arritmias Cardíacas/diagnóstico por imagen , Catecolaminas
17.
Lancet Glob Health ; 11(2): e296-e300, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36669810

RESUMEN

Snakebite clinical trials have often used heterogeneous outcome measures and there is an urgent need for standardisation. A globally representative group of key stakeholders came together to reach consensus on a globally relevant set of core outcome measurements. Outcome domains and outcome measurement instruments were identified through searching the literature and a systematic review of snakebite clinical trials. Outcome domains were shortlisted by use of a questionnaire and consensus was reached among stakeholders and the patient group through facilitated discussions and voting. Five universal core outcome measures should be included in all future snakebite clinical trials-mortality, WHO disability assessment scale, patient-specific functional scale, acute allergic reaction by Brown criteria, and serum sickness by formal criteria. Additional syndrome-specific core outcome measures should be used depending on the biting species. This core outcome measurement set provides global standardisation, supports the priorities of patients and clinicians, enables meta-analysis, and is appropriate for use in low-income and middle-income settings.


Asunto(s)
Salud Global , Mordeduras de Serpientes , Humanos , Consenso , Evaluación de Resultado en la Atención de Salud , Mordeduras de Serpientes/terapia , Encuestas y Cuestionarios , Resultado del Tratamiento , Ensayos Clínicos como Asunto
18.
Med Trop Sante Int ; 3(3)2023 09 30.
Artículo en Francés | MEDLINE | ID: mdl-38094484

RESUMEN

Background: Snakebite clinical trials have often used heterogeneous outcome measures and there is an urgent need for standardisation. Method: A globally representative group of key stakeholders came together to reach consensus on a globally relevant set of core outcome measurements. Outcome domains and outcome measurement instruments were identified through searching the literature and a systematic review of snakebite clinical trials. Outcome domains were shortlisted by use of a questionnaire and consensus was reached among stakeholders and the patient group through facilitated discussions and voting. Results: Five universal core outcome measures should be included in all future snakebite clinical trials: mortality, WHO disability assessment scale, patient-specific functional scale, acute allergic reaction by Brown criteria, and serum sickness by formal criteria. Additional syndrome-specific core outcome measures should be used depending on the biting species. Conclusion: This core outcome measurement set provides global standardisation, supports the priorities of patients and clinicians, enables meta-analysis, and is appropriate for use in low-income and middle-income settings.


Asunto(s)
Ensayos Clínicos como Asunto , Mordeduras de Serpientes , Humanos , Consenso , Evaluación de la Discapacidad , Evaluación de Resultado en la Atención de Salud , Mordeduras de Serpientes/diagnóstico , Encuestas y Cuestionarios
19.
Solid State Nucl Magn Reson ; 45-46: 23-9, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-22647224

RESUMEN

Water behavior on the pore surface of nano-silica MCM-41, at a hydration level corresponding to one water molecule per OH group, is studied using (2)H NMR spectra in the temperature range 213 to 313 K. In an earlier study [J. Hassan, E. Reardon, H. Peemoeller, Microporous Mesoporous Materials, 122 (2009) 121-127] it was shown that at this hydration level, deuterons of water at single OH sites exhibit a Lorentzian line shape and deuterons of water at hydrogen-bonded OH sites exhibit a powder pattern. Here it is shown that magnetization exchange occurs between these two deuteron spin groups. This exchange cannot be described using the common, two-site exchange model, involving two Lorentzians. We successfully apply a multi-Lorentzian exchange model, prompted by Woessner's work [D. E. Woessner, Mol. Phys. 34, 4, (1977) 899-920] on the effects of motion on the shape of water spin resonance lines exhibiting doublet splitting. For this low hydration sample the rate of magnetization exchange out of the hydration site, where the water deuterons exhibit a Lorentzian line in the (2)H spectra, is 1.3 ms(-1) and the activation energy for the exchange is found to be 3.4±0.1 kcal/mole.

20.
Euro Surveill ; 17(49)2012 Dec 06.
Artículo en Inglés | MEDLINE | ID: mdl-23231894

RESUMEN

In 2011, there was a large measles outbreak in Dublin. Nationally 285 cases were notified to the end of December 2011, and 250 (88%) were located in the Dublin region. After the first case was notified in week 6, numbers gradually increased, with 25 notified in June and a peak of 53 cases in August. Following public health intervention including a measles-mumps-rubella (MMR) vaccination campaign, no cases were reported in the Dublin region in December 2011. Most cases (82%) were children aged between 6 months and 14 years, and 46 cases (18%) were under 12 months-old. This is the first outbreak in Dublin to utilise a geographic information system for plotting measles cases on a digital map in real time. This approach, in combination with the analysis of case notifications, assisted the department of public health in demonstrating the extent of the outbreak. The digital mapping documented the evolution of two distinct clusters of 87 (35%) cases. These measles cases were infected with genotype D4-Manchester recently associated with large outbreaks across Europe. The two clusters occurred in socio-economically disadvantaged areas and were attributable to inadequate measles vaccination coverage due in part to the interruption of a school-based MMR2 vaccination programme.


Asunto(s)
Notificación de Enfermedades , Brotes de Enfermedades , Sistemas de Información Geográfica , Sarampión/epidemiología , Adolescente , Niño , Preescolar , Control de Enfermedades Transmisibles/organización & administración , Femenino , Humanos , Incidencia , Lactante , Irlanda/epidemiología , Masculino , Sarampión/prevención & control , Vacuna contra el Sarampión-Parotiditis-Rubéola/administración & dosificación , Distribución por Sexo
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