Publications by authors named "Felipe Tuon"

This study aimed to standardize qPCR techniques using these molecular markers kDNA and 18S rDNA across three sample types: peripheral blood, guanidine-treated blood, and tissue. The secondary objective is to evaluate the performance of 18S rDNA target in samples from 46 patients with confirmed tegumentary leishmaniasis. After obtaining the standard curve from reference strains with Leishmania, qPCR curves were standardizations and the Cts results of the patient samples were described using abstract measures.

View Article and Find Full Text PDF

Silver nanoparticles have garnered significant attention for their antimicrobial applications. The aim of this study was to develop and characterize a silver nanoparticle-enhanced bone graft and assess its antimicrobial and antibiofilm activities. Bone granules from bovine cancellous femur were impregnated with silver nanoparticles (50 nm).

View Article and Find Full Text PDF

To correlate the incidence of leptospirosis with sociodemographic data in the Brazilian Unified Health System from 2011 to 2022. This ecological study used national health and economic secondary data sources. Secondary analyses summarized the scenario of disease-related hospitalizations among federative units.

View Article and Find Full Text PDF

Background: Treating NDM-producing bacteria poses a significant challenge, especially for those bacteria inherently resistant to polymyxin, such as Serratia marcescens, necessitating combined therapies.

Objective: To assess in vitro the synergistic effect of different antimicrobial combinations against NDM-producing S. marcescens.

View Article and Find Full Text PDF

Background: The global need for rapid diagnostic methods for pathogen identification and antimicrobial susceptibility testing (AST) is underscored by the increasing bacterial resistance and limited therapeutic options, especially critical in sepsis management.

Summary: This review examines the aspects of the eHealth and mHealth in Antimicrobial Stewardship Programs (ASPs) to improve the treatment of infections and rational use of antimicrobials.

Key Messages: The evolution from traditional phenotype-based methods to rapid molecular and mass spectrometry techniques has significantly decreased result turnaround times, improving patient outcomes.

View Article and Find Full Text PDF

Background: The Brazilian supplementary health market has undergone transformations in recent years due to constant mergers and acquisitions of by large corporations, contributing to the increase in market concentration, especially in the poorest and least developed regions of the country. Thus, given the care it provides and its economic relevance, understanding the fundamentals of these movements, the likely consequences and trends for the health market are relevant, important, and strategic.

Objective: To understand the general and specific context of Brazilian supplementary health, its scenarios, and trends, with emphasis on the analysis of market concentration and recent mergers and acquisitions.

View Article and Find Full Text PDF
Article Synopsis
  • COVID-19 causes hypercytokinemia, an imbalance of inflammatory cytokines, which complicates treatment, especially in severe cases.
  • A study tracked cytokine levels in SARS-CoV-2 patients over time, finding that elevated levels predicted mortality, particularly for IL-4 and IL-1β.
  • The research indicates that changes in levels of specific cytokines like IFN-γ and IL-6 are linked to patient outcomes, emphasizing the role of cytokine dynamics in predicting severe COVID-19 results.
View Article and Find Full Text PDF
Article Synopsis
  • CDI (Clostridioides difficile infection) is a serious health issue often caused by broad-spectrum antibiotics, prompting this study to analyze a new, lyophilized fecal microbiota transplant product for treating recurrent cases.
  • A pilot study with 24 patients showed a 92% clinical response rate using the microbiota transplant, which was found to maintain significant bacterial viability.
  • The cost-benefit analysis indicated that fecal microbiota transplantation is a safer and cheaper alternative to conventional treatments like vancomycin or metronidazole, potentially saving millions in healthcare costs in Brazil.
View Article and Find Full Text PDF
Article Synopsis
  • The study highlights the need for quicker diagnostic methods to identify pathogens and test for antimicrobial resistance due to increasing bacterial resistance and limited treatment options, especially in sepsis cases.
  • Advances in rapid molecular and mass spectrometry techniques have improved turnaround times for test results, leading to better patient outcomes.
  • The systematic review and meta-analysis show that inadequate empirical antimicrobial therapy is linked to higher mortality rates, making faster pathogen identification technologies crucial for reducing mortality.
View Article and Find Full Text PDF
Article Synopsis
  • Reconstructive and regenerative medicine aim to restore damaged tissues and organs using various biomaterials, such as synthetic polymers and biological tissues, to create effective substitutes for the body.
  • Personalized implants, developed with advanced imaging and computer techniques, are designed for optimal fit and functionality, while regenerative methods utilize cellular therapies to enhance natural healing.
  • The review highlights the importance of advanced solutions in bone repair, including antimicrobial properties in bone substitutes and the role of 3D printing technology in creating customized implants, improving treatment outcomes across medical fields.
View Article and Find Full Text PDF
Article Synopsis
  • The study examined the prevalence of ESBL-producing E. coli in urine samples in Curitiba, Brazil, from 2011 to 2019, finding that about 9.9% of isolates were ESBL-producing.
  • The prevalence increased significantly over the years, from 4.7% in 2012 to 19.3% in 2019, with correlations found between higher prevalence and factors like age, male gender, and increased antibiotic consumption.
  • Statistical models revealed that district-specific influences and antibiotic use explained a notable portion (20%-30%) of the variation in ESBL prevalence, with each additional antibiotic dose linked to a slight uptick in prevalence.
View Article and Find Full Text PDF

The aim of this study was to describe a case of a patient with ocular toxoplasmosis, which has resulted in Kyrieleis plaques formation (segmental periarteritis associated with severe inflammation) and later follow-up and alternative treatment due to documented allergy to sulfonamide. A 33-year-old Brazilian woman diagnosed with acute toxoplasmosis, initially treated with sulfonamide, developed a critical cutaneous rash. Cotrimoxazole was changed to clindamycin and pyrimethamine, and prednisone was started.

View Article and Find Full Text PDF

Objective: In this study, we aimed to evaluate the death risk factors of patients included in the sepsis protocol bundle, using clinical data from qSOFA, SIRS, and comorbidities, as well as development of a mortality risk score.

Design: This retrospective cohort study was conducted between 2016 and 2021.

Setting: Two university hospitals in Brazil.

View Article and Find Full Text PDF

Background: Human brucellosis is a neglected, re-emerging, and endemic zoonosis in many countries. The debilitating and disabling potential of the disease is a warning about its morbidity, generating socioeconomic impact. This review aims to update the current evidence on the efficacy and safety of therapeutic options for human brucellosis using the network meta-analysis (NMA).

View Article and Find Full Text PDF

Extended-spectrum beta-lactamase producing and ciprofloxacin-non-susceptible Escherichia coli are clinical and environmental issues. We evaluated the susceptibility profile of fosfomycin in non-susceptible E. coli isolated from urine and the environment.

View Article and Find Full Text PDF

Background: Simple radiography in conjunction with pertinent medical history and a comprehensive physical examination is typically adequate for diagnosing chronic osteomyelitis (CO). However, radiographic manifestations of CO lack specificity; therefore, the concordance among specialists in this regard has not been systematically assessed. This study aimed to compare and evaluate the proficiency of orthopedic surgeons and radiologists in identifying radiographic indicators present in simple radiographs for diagnosing CO.

View Article and Find Full Text PDF
Article Synopsis
  • Bone cement with antibiotics like vancomycin or gentamicin is used to fight orthopedic infections, but their effectiveness is limited against some bacteria.
  • This study tested silver nanoparticles (AgNPs) combined with polymethylmethacrylate (PMMA) to see if they could reduce biofilm formation by several bacteria, including Staphylococcus aureus and Pseudomonas aeruginosa.
  • Results showed that while AgNP-loaded PMMA with antibiotics significantly decreased bacteria counts, AgNPs alone weren't as effective, highlighting the importance of using them together for better results against stubborn infections.
View Article and Find Full Text PDF
Article Synopsis
  • The study discusses the immune responses of an HIV-infected patient suffering from mucosal leishmaniasis, a condition not well understood in terms of immune reactions.
  • The patient had a notably low CD4 count of 85 cells/mm3 and experienced significant nasal damage over 2 years due to the disease.
  • Immune evaluations indicated a mixed Th1/Th2 response alongside both activated and exhausted T cells, enhancing our understanding of HIV's impact on responses to mucosal leishmaniasis.
View Article and Find Full Text PDF

Introduction: Laboratory diagnosis of measles can be challenging, and the reintroduction of the measles virus in Brazil has brought about new issues. The aim of this study was to analyze the qPCR results of swab and urine samples and compare them with those of immunological methods for the diagnosis of measles.

Methods: This was a cross-sectional study based on a retrospective analysis of 3,451 suspected cases using laboratory test surveillance databases for qPCR (respiratory swabs and urine) and serologic tests for IgM and paired IgG.

View Article and Find Full Text PDF
Article Synopsis
  • The rising usage of contact lenses globally has led to an increased risk of serious complications, primarily microbial keratitis, which can lead to corneal ulcers.
  • Fourteen contact lens solutions were tested against various biofilm-forming bacteria and fungi to determine their effectiveness in eradicating biofilms after 24 hours of exposure.
  • While most solutions worked well against free-floating (planktonic) cells, only five showed significant effectiveness against S. marcescens biofilm, with none being able to eradicate biofilms of S. aureus, P. aeruginosa, or C. albicans.
View Article and Find Full Text PDF

Acinetobacter baumannii infection presents a high mortality rate and few therapeutic options. This study aimed to evaluate clinical-microbiological characteristics and prognosis factors of patients diagnosed with A. baumanni.

View Article and Find Full Text PDF

Objective: To evaluate survival and direct medical costs of patients admitted in private hospitals with COVID-19 during the first wave.

Methods: A retrospective, observational study analyzing survival and the economic data retrieved on hospitalized patients with COVID-19. Data from March 2020 to December 2020.

View Article and Find Full Text PDF

Introduction: Urinary catheter-related infection is commonly associated with bacterial biofilm. The impact of anaerobes is unknown, but their detection in the biofilm on this device has not been previously reported. This study aimed to evaluate the capability to recovery strict, facultative, and aerobic microorganisms in patients using bladder catheters from ICUs using conventional culture, sonication, urinary analysis, and mass spectrometry.

View Article and Find Full Text PDF

Introduction: Pseudomonas aeruginosa respiratory infections are challenging, and the risk of recurrence is a frequent problem. The aim of this study was to investigate the risk factors associated with the presence of P. aeruginosa, and the risk factors related to the recurrence and death of lower airway infections in inpatients in a Brazilian hospital.

View Article and Find Full Text PDF