Publications by authors named "Aura Leal"

Article Synopsis
  • * A total of 530 patients were reported, with the majority exhibiting pneumonia; the study highlighted high rates of ICU admissions (50.6%) and notable resistance to antibiotics among meningial and non-meningial isolates.
  • * The findings indicated a decrease in PCV10 serotypes but an increase in the prevalence of serotypes 19A and 6C, leading to Colombia's decision to switch to the PCV13 vaccine in July 202
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We report the draft genome of a clinical multi-resistant (24Kpn33) isolate, whose genome (5.7 Mbp) harbored 17 antibiotic resistance genes, including . Notably, this gene was mobilized within the IncP-6 pCOL-1 plasmid, the first genetic platform related to the acquisition and dissemination of the in .

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Patients with cancer have a higher risk of severe bacterial infections. This study aims to determine the frequency, susceptibility profiles, and resistance genes of bacterial species involved in bacteremia, as well as risk factors associated with mortality in cancer patients in Colombia. In this prospective multicenter cohort study of adult patients with cancer and bacteremia, susceptibility testing was performed and selected resistance genes were identified.

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The infiltration of foreign materials not approved for medical purposes or of modeling substances used in soft tissue to modify the anatomical appearance for aesthetic purposes represents a serious health problem. These procedures lead to the development of delayed complications, including infections. The objective of this study was to characterize infections in patients with adverse reactions to the use of modeling substances in Cali, Colombia.

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Article Synopsis
  • Acute bacterial meningitis (ABM) is a serious health issue that has reappeared in Colombia after new vaccines were introduced, as some types of bacteria are not covered by these vaccines.
  • A study across 17 hospitals in Colombia looked at how cases of meningitis changed before and after the PCV10 vaccine was used.
  • The study found that while some types of bacteria decreased, others, like Spn19A, became more common and showed resistance to medicines, meaning they are harder to treat; there was also a rise in death rates from this disease.
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Resistance to carbapenems in Klebsiella pneumoniae has been mostly related with the worldwide dissemination of KPC, largely due to the pandemic clones belonging to the complex clonal (CC) 258. To unravel bla post-endemic clinical impact, here we describe clinical characteristics of 68 patients from a high complexity hospital, and the molecular and genetic characteristics of their 139 bla-K. pneumoniae (KPC-Kp) isolates.

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Article Synopsis
  • The introduction of pneumococcal conjugate vaccines (PCV) has significantly reduced the incidence of invasive pneumococcal disease (IPD), leading to a decrease in vaccine-associated serotypes, but has resulted in the emergence of non-vaccine serotypes like 19A.
  • A study conducted on pediatric patients with IPD from 2008 to 2017 in Bogota examined cases related to the implementation of the PCV10 vaccine, focusing on various infections and analyzing demographic and clinical data.
  • The prevalence of IPD caused by serotype 19A increased from 4.4% (2008-2011) to 32.4% (2014-2017), with pneumonia being the
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Background: Enterococcus faecium is ranked worldwide as one of the top ten pathogens identified in healthcare-associated infections (HAI) and is classified as one of the high priority pathogens for research and development of new antibiotics worldwide. Due to molecular biology techniques' higher costs, the approach for identifying and controlling infectious diseases in developing countries has been based on clinical and epidemiological perspectives. Nevertheless, after an abrupt vancomycin-resistant Enterococcus faecium dissemination in the Méderi teaching hospital, ending up in an outbreak, further measures needed to be taken into consideration.

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Introduction: Methicillin-resistant Staphylococcus aureus (MRSA) causes severe skin and soft tissue infections in hospitals and, more recently, in the community. Tedizolid is a new second-generation oxazolidinone derivative having greater in vitro potency than linezolid against this type of microorganism. Objectives: To evaluate the antimicrobial activity of tedizolid and other comparator antibiotics in MRSA isolates causing skin and soft tissue infections in Colombian hospitals.

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Introduction: Urinary tract infection is the most common pathology in diabetic patients, and an important determinant of morbidity and mortality among them. The increasing resistance of uropathogens acquired in the community to commonly used antibiotics is alarming.

Objective: To identify the profile of antibiotic susceptibility of uropathogens responsible for communityacquired infections among diabetic patients in hospitals in Colombia.

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Introduction: Methicillin-resistant Staphylococcus aureus is a frequent pathogen at critical care services. Its presence leads to increased hospital stays and mortality risk in patients with bacteremia. However, the etiology of this resistance marker has not been fully studied.

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Introduction: Streptococcus pneumoniae (S. pneumoniae), also known as pneumococcus, is one of the main bacteria associated with mortality in children under 2 years of age, with a morbidity and mortality incidence that varies according to demographics and exposure to risk, or protective factors.

Objective: To describe the child mortality due to invasive pneumococcal disease (IPD) between 2008 -2014 (6 years), in 8 Medical Centres in Bogotá, Colombia.

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Introduction: Resistant infections, especially those involving the bloodstream, are associated with a greater use of resources. Their estimates are variable and depend on the methodology used. Staphylococcus aureus is the main pathogen isolated in blood in our hospitals.

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Nosocomial infections caused by carbapenem-resistant Acinetobacter baumannii isolates have reached epidemic levels in past decades. Currently this microorganism is responsible for outbreaks of difficult eradication and with high mortality rates worldwide. We herein report a rare case of an OXA-72-producing A.

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Unlabelled: Introduction : One of the major worldwide public health problems today are the infections caused by carbapenem-resistant Enterobacteriaceae (CRE), among which carbapenem-resistant Klebsiella pneumoniae (CRKP), constitutes one of the most common pathogens causing nosocomial infection.

Objective: This study was aimed at describing the dissemination of KPC-3 enzyme-producing Klebsiella pneumoniae in clinical isolates from hospitals in Bogotá.

Materials And Methods: Eighty-two CRKP isolates collected from 10 hospitals in Bogotá from 2008-2010 were analysed; disk diffusion and microdilution were used for phenotypic detection of enzymes and PCR for genotyping.

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Introduction: USA300 is a genetic lineage found both in methicillin-resistant (MRSA) and methicillin-sensitive Staphylococcus aureus (MSSA) isolates. In Colombia, hospital and community MRSA infections are caused by a USA300-related community genotype MRSA (CG-MRSA) clone. The genetic origin of this clone is unknown yet.

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Introduction: Among hospital-acquired infections, bacteremia is one of the leading causes of mortality worldwide, especially among intensive care unit patients, where it is more frequent. Pseudomonas aeruginosa is one of the most aggressive agents causing bacteremia.

Objective: To evaluate the association between initial antimicrobial therapy and hospital mortality in these patients.

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Objective: Community-genotype methicillin-resistant Staphylococcus aureus (CG-MRSA) isolates are known to be more virulent and clinically aggressive in children. The goal of the present study was characterize the molecular epidemiology of MRSA isolates causing infections in Colombian children.

Methods: An observational and prospective study was conducted between April 2009 and June 2011 at 15 hospitals in Bogotá, Colombia.

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Pseudomonas aeruginosa infections cause high morbidity and mortality. We performed a descriptive analysis of the rates of antibiotic resistance in isolates of P. aeruginosa in 33 hospitals enrolled in a surveillance network in Colombia.

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Introduction: Candidemia is an infectious complication with high morbidity and mortality in intensive care patients.

Objective: The aim of this study was to determine the incidence and prevalence of candidemia in critically ill patients in Colombian hospitals between 2004 and 2008.

Materials And Methods: Data from microbiologically confirmed candidemia cases, ICU stay and admissions were retrospectively recorded in 7 Colombian hospitals between 2004 and 2008.

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β-Lactam resistance in Pseudomonas aeruginosa clinical isolates is driven by a number of mechanisms. Whilst several are understood, how they act co-operatively in pathogenic strains is less clear. In some isolates, resistance profiles cannot always be explained by identifying the common resistance-determining pathways, suggesting that other mechanisms may be important.

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Objective: The aim of this study was to describe the most frequently found bacterial microorganisms in bloodstream isolates taken from patients in intensive care units in Colombia and their resistance profiles.

Methods: This was a multicentre descriptive observational study that was carried out between January 2001 and June 2008 with laboratory data from 33 participating hospitals in a surveillance network.

Results: The most frequently found microorganisms were coagulase-negative Staphylococci 39.

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Objective: To determine the molecular epidemiology and presence of virulence genes in community-acquired (CA) and hospital-acquired (HA) methicillin-resistant Staphylococcus aureus (MRSA) isolates and their relationship to clinical outcomes.

Methods: An observational and prospective study of infections caused by MRSA was conducted between June 2006 and December 2007 across seven hospitals in three Colombian cities. MRSA isolates were analyzed for SCCmec.

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Objective: To evaluate risk factors associated with methicillin-resistant Staphylococcus aureus (MRSA) bacteremia emergence, its prognosis, and mortality-determining factors in critically ill patients in Colombia.

Methods: A multicenter, retrospective cohort study conducted in 2005-2008 at 16 public and private reference health care institutions in Bogotá, Colombia, that form part of a national epidemiological surveillance network and a hospital network with 4 469 beds. Methicillin-resistant emergence and mortality were analyzed using descriptive and time-to-event analysis; a multivariate Cox proportional hazard regression model was built to test the association between methicillin resistance and mortality.

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Article Synopsis
  • A new clone of community genotype methicillin-resistant Staphylococcus aureus (CG-MRSA) has been identified in Colombia, separate from the commonly known USA300 strain.
  • This new clone is characterized by a specific spa type (t1635) and lacks the ACME genetic element.
  • The emergence of this clone suggests an evolving landscape of MRSA infections, particularly among children in Latin America.
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