Publications by authors named "Catarina Chaves"

Introduction: Women with first trimester fasting glycaemia (FTFG) 92-125 mg/dL may present with normal 24-28th week OGTT (2T-OGTT). Predictors of persistent hyperglycaemia were scarcely investigated. We studied the prevalence and predictors of gestational diabetes mellitus (GDM) in the 2T-OGTT in women with untreated elevated FTFG.

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Introduction: Gestational diabetes (GD) is a risk factor for neonatal hypoglycaemia (NH), but other factors can increase this risk.

Objectives: To create a score to predict NH in women with GD.

Methods: Retrospective study of women with GD with a live singleton birth between 2012 and 2017 from the Portuguese GD registry.

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  • The BIOFIRE Joint Infection (JI) Panel uses multiplex-PCR testing to identify microorganisms in synovial fluid from patients suspected of septic arthritis and prosthetic joint infections.
  • A study over 34 clinical sites in Europe and the Middle East indicated that the JI Panel showed 88.4% agreement in diagnosing septic arthritis and 85% for prosthetic joint infections when compared to traditional synovial fluid cultures.
  • The JI Panel not only detected more positive samples, especially anaerobic bacteria, but also provided results in about one hour, improving patient management and treatment decisions.
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Despite extensive research, targeted delivery of substances to the brain still poses a great challenge due to the selectivity of the blood-brain barrier (BBB). Most molecules require either carrier- or receptor-mediated transport systems to reach the central nervous system (CNS). These transport systems form attractive routes for the delivery of therapeutics into the CNS, yet the number of known brain endothelium-enriched receptors allowing the transport of large molecules into the brain is scarce.

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Globally, more than 50 countries have been affected by Monkey pox virus after COVID-19 has subsided. WHO declared "public health emergency of international concern" in year 2022 because of virus affecting 60,000 people in just one month that belonged to clade-IIb. Previously, it had been transmitted by body fluids, lesions and touching items, but fresh transmission is via sexual activity among bisexuals and man to man sex (MSM).

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Microbiological diagnosis of osteoarticular infections (OI) is crucial for a successful treatment. A prospective multicenter study including 262 synovial fluids with suspicion of acute OI was performed between July 2021 and October of 2022. BioFire Joint Infection Panel multiplex-PCR test was performed and results were compared with conventional cultures of synovial fluid specimens.

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Introduction: The Martin (MF) and Sampson (SF) formulas have shown greater accuracy for low-density lipoprotein cholesterol (LDL-C) < 70 mg/dL compared to the Friedewald formula (FF); however, some disagreement is maintained. Non-high-density lipoprotein cholesterol (non-HDL-C) and apolipoprotein B (ApoB) are alternatives to assessing cardiovascular risk in patients with very low LDL-C. The objective was to evaluate the accuracy of FF, MF, and SF formulas to estimate LDL-C < 70 mg/dL vs.

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  • Community-acquired pneumonia (CAP) continues to be a major cause of death globally, and current scoring models like CURB-65 help evaluate severity but lack long-term prognosis predictions for high-risk patients.
  • This study aims to assess the CURB-65 model's effectiveness in predicting six-month mortality for patients hospitalized with CAP, while also considering various factors like demographics and infection types.
  • Findings show that a significant percentage of patients were classified as high-risk, with mortality rates increasing over time, indicating that CURB-65 could be helpful for personalized treatment and improved patient management.
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Aims: Foetal male sex is associated with adverse perinatal outcomes. However, studies evaluating the impact of foetal sex on perinatal outcomes in women with gestational diabetes (GDM) are scarce. We studied whether male new-born sex is associated with neonatal outcomes, in women with GDM.

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Background: Infections by multidrug-resistant (MDR) microorganisms are associated with increased morbidity and mortality in burn patients. This study aimed to analyze the evolution of MDR bacteria over a five-year period at Coimbra Burns Unit (CBU) in Portugal, seeking to assess the possible associations of specific bacteria with presumed risk factors.

Methods: The data obtained consisted of identified bacteria present in any microbiological sample from each patient (including blood, central venous catheter, urine, tracheal aspirate and/or wound exudate).

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  • The study investigated the link between height and glucose intolerance in women with gestational diabetes, focusing on how this relationship varies with body mass index (BMI).
  • Data was collected from the Portuguese GDM registry, involving 7402 women, and results showed that taller women had lower BMI and lower rates of glucose intolerance.
  • The results revealed that for non-obese women, each 1 cm increase in height correlated with a 3% decrease in the risk of developing diabetes or prediabetes postpartum.
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Background: Increasing brain exposure of biotherapeutics is key to success in central nervous system disease drug discovery. Accessing the brain parenchyma is especially difficult for large polar molecules such as biotherapeutics and antibodies because of the blood-brain barrier. We investigated a new immunization strategy to identify novel receptors mediating transcytosis across the blood-brain barrier.

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Objectives: To study the in vitro activity of imipenem/relebactam and comparators and the imipenem/relebactam resistance mechanisms in a Pseudomonas aeruginosa collection from Portugal (STEP, 2017-18) and Spain (SUPERIOR, 2016-17) surveillance studies.

Methods: P. aeruginosa isolates (n = 474) were prospectively recovered from complicated urinary tract (cUTI), complicated intra-abdominal (cIAI) and lower respiratory tract (LRTI) infections in 11 Portuguese and 8 Spanish ICUs.

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Imipenem-relebactam is a novel β-lactam-β-lactamase inhibitor combination. We evaluated the activity of imipenem-relebactam and comparators against clinical isolates recovered in 8 Spanish and 11 Portuguese intensive care units (ICUs) (SUPERIOR, 2016-2017; STEP, 2017-2018). Overall, 747 isolates (378 Escherichia coli, 252 Klebsiella spp.

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is a Gram-positive anaerobic facultative coccus that colonises the skin. Human infection is rare, with very few cases being described in the literature. The authors present the case of a 17-year-old man, with a history of cholesteatoma, diagnosed with mastoiditis complicated by intracranial empyema.

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  • Hyperglycaemia during pregnancy can indicate either gestational diabetes or previously undiagnosed diabetes, prompting a study on predicting type 2 diabetes (T2DM) risk in postpartum women.
  • Researchers analyzed data from 4068 pregnant women to identify optimal fasting glycaemia (FTG) and glycated hemoglobin (HbA1c) cut-off values for T2DM and abnormal glucose homeostasis (AGH) using receiver-operating characteristic (ROC) curves.
  • The study found that FTG < 99 mg/dL and HbA1c < 5.4% are effective cut-offs for ruling out T2DM, suggesting early testing could help identify undiagnosed diabetes in women after childbirth.
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Background: A single prolactin sampling is recommended for the diagnosis of hyperprolactinemia. We aimed to study the utility of the prolactin serial sampling and to determine the best cut-offs associated with persistent hyperprolactinemia.

Methods: Retrospective study of hyperprolactinemic patients [referral prolactin (rPRL)] that underwent prolactin serial samplings.

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Aim: Metformin use in gestational diabetes (GDM) is a common practice. Although its use in combination with insulin might be advantageous, it was never formally tested. We studied whether combined treatment was associated with better obstetric or neonatal outcomes compared to insulin alone.

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Ceftolozane-tazobactam (C/T) is frequently used for infections caused by multidrug-resistant (MDR)-Enterobacterales isolates. Whole-genome sequencing (WGS, Illumina-Hiseq 4000/NovaSeq 6000, OGC, UK) was used to study the population structure, the resistome and the virulome of C/T-susceptible and -resistant MDR Escherichia spp. (n=30) and Klebsiella spp.

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Transient receptor potential vanilloid 1-4 (TRPV1-4) expression and functionality were investigated in brain microvessel endothelial cells (BMEC) forming the blood-brain barrier (BBB) from rat and human origins. In rat, Trpv1-4 were detected by qRT-PCR in the brain cortex, brain microvessels, and in primary cultures of brain microvessel endothelial cells [rat brain microvessel endothelial cells (rPBMEC)]. A similar expression profile in isolated brain microvessels and rPBMEC was found with the following order: > > > .

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Objectives: To analyse the epidemiology, the resistome and the virulome of ceftolozane/tazobactam-susceptible or -resistant Pseudomonas aeruginosa clinical isolates recovered from surveillance studies in Portugal (STEP, 2017-18) and Spain (SUPERIOR, 2016-17).

Methods: P. aeruginosa isolates were recovered from intra-abdominal, urinary tract and lower respiratory tract infections in ICU patients admitted to 11 Portuguese and 8 Spanish hospitals.

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The non-human primate (NHP)-brain endothelium constitutes an essential alternative to human in the prediction of molecule trafficking across the blood-brain barrier (BBB). This study presents a comparison between the NHP transcriptome of freshly isolated brain microcapillaries and in vitro-selected brain endothelial cells (BECs), focusing on important BBB features, namely tight junctions, receptors mediating transcytosis (RMT), ABC and SLC transporters, given its relevance as an alternative model for the molecule trafficking prediction across the BBB and identification of new brain-specific transport mechanisms. In vitro BECs conserved most of the BBB key elements for barrier integrity and control of molecular trafficking.

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