Publications by authors named "Eliana Silva"

Article Synopsis
  • Advances in diagnostic techniques and environmental changes have led to heightened surveillance of arboviruses in the Amazon, revealing more insect-specific viruses in blood-feeding arthropods.
  • The study documented the first isolation of a specific virus from mosquitoes in the Brazilian Amazon by collecting specimens from a forested area and using cell cultures for viral isolation.
  • The research identified a mosquito batch positive for a particular genus, marking the first report of insect-specific alphavirus isolation in Brazil and within Amazon Forest remnants.
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This study investigates the perception of a multinational group of nephrologists on artificial intelligence (AI) application in clinical practice. A validated on-line survey was performed in March 2024, in 4 continents. The results revealed a prevalent familiarity with AI and machine learning (ML) terms, but traditional tools remained favored for clinical decision support.

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Article Synopsis
  • The study presents the first isolation of the Umattila virus (UMAV) in Brazil, obtained from a bird's blood and cultured in cells.
  • The viral genome consists of ten segments and aligns with the characteristics of its genus and family, with sequencing confirming its identity with UMAV.
  • Phylogenetic analysis reveals that the Brazilian isolate is genetically distinct yet related to global strains, suggesting the need for more research on UMAV's epidemiology and interactions with hosts and vectors.
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The Orthoflavivirus ilheusense (ILHV) is an arbovirus that was first isolated in Brazil in 1944 during an epidemiologic investigation of yellow fever. Is a member of the Flaviviridae family and it belongs to the antigenic complex of the Ntaya virus group. Psorophora ferox is the primary vector of ILHV and this study presents the isolation and phylogenetic analysis of ILHV in a pool of Ps.

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Article Synopsis
  • ILHV, a member of the Flaviviridae family, was first isolated in 1944 from mosquitoes and is being studied for its potential transmission by certain mosquito species.
  • The study involved infecting the F1 generation of a specific mosquito species with ILHV and analyzing samples from their bodies, heads, and saliva over several days post-infection (dpi).
  • Results showed that the mosquitoes did not harbor ILHV in their bodies or heads at any point, indicating their resistance to the virus and suggesting they do not participate in its transmission cycle.
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This study investigates the hydrogen evolution reaction (HER) efficiency of two photosystems incorporating an all-inorganic molecular thiomolybdate [MoS] cluster as a HER catalyst. First, we delve into the performance of a homogeneous [MoS]/[Ru(bpy)] (Mo/Ru) dyad which demonstrates high turnover frequencies (TOFs) and apparent quantum yields (AQYs) at 445 nm approaching the level of 0.5%, yet its performance is marked by pronounced deactivation.

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Early treatment of kidney disease can slow disease progression and reduce the increased risk of mortality associated with end-stage kidney disease. However, uncertainty exists whether early referral (ER) to nephrological care or an optimal dialysis start impacts patient outcome after dialysis initiation. We determined the effect of ER and suboptimal dialysis start on the 3-year mortality and hospitalizations after dialysis initiation.

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Article Synopsis
  • Dengue virus serotype 2 (DENV-2) is a significant cause of global dengue epidemics and is linked to severe disease cases.
  • The study analyzed 32 DENV-2 samples collected from northern Brazil between 2017 and 2021, focusing on states like Acre, Roraima, and Tocantins.
  • Two main lineages were identified: one from the Asian-American genotype (related to Puerto Rico) and one from the cosmopolitan genotype (related to Peru), which aids in understanding DENV genotypes and their potential spread.
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The genus has 817 species subdivided into 28 subgenera. It has a cosmopolitan distribution, being most abundant in countries with a tropical climate. Understanding the ecology and diversity of viruses circulating in the species of this genus is important for understanding their role as arbovirus vectors in Brazil.

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Bacterial resistance to antibiotics is a critical global health issue and the development of alternatives to conventional antibiotics is of the upmost relevance. Antimicrobial photodynamic therapy (aPDT) is considered a promising and innovative approach for the photoinactivation of microorganisms, particularly in cases where traditional antibiotics may be less effective due to resistance or other limitations. In this study, two β-modified monocharged porphyrin-imidazolium derivatives were efficiently incorporated into polyvinylpyrrolidone (PVP) formulations and supported into graphitic carbon nitride materials.

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CuAl layered double hydroxide (LDH) and polymeric carbon nitride (g-CN, GCNN) were assembled to construct a set of novel 2D/2D CuAl-LDH/GCNN heterostructures. These materials were tested towards H and O generation from water splitting using visible-light irradiation. Compared to pristine materials, the heterostructures displayed strongly enhanced visible-light H evolution, dependent on the LDH content, which acts as a cocatalyst, replacing the benchmark Pt.

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FeNi oxides/hydroxides are the best performing catalysts for oxidizing water at basic pH. Consequently, their improvement is the cornerstone to develop more efficient artificial photosynthetic systems. During the last 5 years different reports have demonstrated an enhancement of their activity by engineering their structures via: (1) modulation of the number of oxygen, iron and nickel vacancies; (2) single atoms (SAs) doping with metals such as Au, Ir, Ru and Pt; and (3) modification of their surface using organic ligands.

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Dengue virus 2 (DENV-2) seriously contributes to dengue-related mortality. It includes five nonsylvatic genotypes, with cosmopolitan being the most widespread with a significant contribution to the total number of DENV-2 cases globally. In South America, the cosmopolitan genotype was first recorded in 2019 in Madre de Dios, Peru, and then in Goiás (Midwest Brazil) in November 2021.

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Background: Pit viper snakebites are challenging as they often cause tissue injury and secondary bacterial infection that may impair full recovery of the affected limb. We describe the evolution of a snakebite injury with secondary infection and the use of specialized dressings to achieve tissue repair and complete closure of the wound.

Case: Ms E.

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The risk of the emergence and reemergence of zoonoses is high in regions that are under the strong influence of anthropogenic actions, as they contribute to the risk of vector disease transmission. Yellow fever (YF) is among the main pathogenic arboviral diseases in the world, and the Culicidae has been proposed as having the potential to transmit the yellow fever virus (YFV). This mosquito inhabits both urban and wild environments, and under experimental conditions, it has been shown to be susceptible to infection by YFV.

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Viruses with encephalitogenic potential can cause neurological conditions of clinical and epidemiological importance, such as , , , , , , , and . The objective of the present study was to determine the number of arboviruses with neuroinvasive potential isolated in Brazil that corresponds to the collection of viral samples belonging to the Department of Arbovirology and Hemorrhagic Fevers, Evandro Chagas Institute (SAARB/IEC) of the Laboratory Network of National Reference for Arbovirus Diagnosis from 1954 to 2022. In the analyzed period, a total of 1,347 arbovirus samples with encephalitogenic potential were isolated from mice; 5,065 human samples were isolated exclusively by cell culture; and 676 viruses were isolated from mosquitoes.

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is a flavivirus transmitted by mosquitoes, mainly of the genus . In Brazil, serological studies have already indicated the circulation of the virus since 2003, with the first human case detected in 2014. The objective of the present paper is to report the first isolation of WNV in a Culex (Melanoconion) mosquito.

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is characterized as a neurotropic pathogen, which can cause West Nile fever and is transmitted by mosquitoes of the genus . In 2018, the Instituto Evandro Chagas performed the first isolation of a WNV strain in Brazil from a horse brain sample. The present study aimed to evaluate the susceptibility of orally infected from the Amazon region of Brazil to become infected and transmit the WNV strain isolated in 2018.

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Background/aim: This study aimed to evaluate the toxicities and response rate of a modified TPF (docetaxel, cisplatin, and 5-fluorouracil) protocol in patients with locally advanced head and neck cancer (ECOG performance status ≤1).

Patients And Methods: Induction treatment consisted of cisplatin 25 mg/m/day as a 90 min infusion for three consecutive days, leucovorin 20 mg/m/day as a bolus for four consecutive days, 5-fluorouracil (5-FU) 370 mg/m/day as a bolus for four consecutive days, and paclitaxel 60 mg/m as a 1-h infusion on Days 1, 8, and 15, repeated every 3-4 weeks (twelve cycles to 6 patients).

Results: The main toxicities were grade 1 neuropathy, mucositis, and fatigue.

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Non-human primates contribute to the spread of yellow fever virus (YFV) and the establishment of transmission cycles in endemic areas, such as Brazil. This study aims to investigate virological, histopathological and immunohistochemical findings in livers of squirrel monkeys ( spp.) infected with the YFV.

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The impact of urban violence on society has been the subject of several studies, but the consequences of fear for habits of cultural consumption are missing in cultural economics research. This article investigates whether the fear of urban violence explains individuals' choice between different options of cultural participation with a particular focus on the activities of watching movies and listening to music. Based on individual data from a survey conducted in 2019 with 1211 residents from a conglomeration of sixteen favelas (slums) located in the Maré neighbourhood in Rio de Janeiro (Brazil), this study employs Simultaneous Bivariate Ordered Probit Models to verify the association between individuals' fear of violence and their choice of consuming culture in private or public spaces.

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The rapid and disorderly urbanization in the Amazon has resulted in the insertion of forest fragments into cities, causing the circulation of arboviruses, which can involve hematophagous arthropods and free-ranging birds in the transmission cycles in urban environments. This study aimed to evaluate the circulation of arboviruses in free-ranging birds and hematophagous arthropods captured in an Environmental Protection Area in the Belem metropolitan area, Brazil. Birds were captured using mist nets, and hematophagous arthropods were collected using a human protected attraction technique and light traps.

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A panoramic analysis of chemokines, pro-inflammatory/regulatory cytokines, and growth factors was performed in serum samples from patients with acute DENV infection (n=317) by a high-throughput microbeads array. Most soluble mediators analyzed were increased in DENV patients regardless of the DENV serotype. The substantial increase (≥10-fold) of CXCL10, IL-6, and IFN-γ, and decreased levels of PDGF (<0.

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Background: Hereditary cancer syndromes have been conceptualized as a family level process. The present study explores the complexity and challenges of family adaptation to the hereditary cancer syndrome, in the context of genetic counseling and long-term cancer risk management and follow-up surveillance.

Methods: We performed semi-structured interviews with 13 participants with one of the following hereditary cancer syndromes: Lynch Syndrome, Hereditary Diffuse Gastric Cancer Syndrome, Hereditary Breast and Ovarian Cancer Syndrome, or Familial Adenomatous Polyposis.

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Objectives: Healthy individuals from hereditary cancer families undergoing genetic testing for cancer susceptibility (GTC) report more distress when they perceive their social support as low and suppress their emotions. This study aimed to explore how suppressing emotions and perceiving others as unsupportive are related with cancer-risk distress.

Methods: We performed a regression-based mediation analysis to assess if expressive suppression mediates or is mediated by perceived social support in the relation with cancer-risk distress.

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