scholarly journals Avoiding ventilator-associated pneumonia: Curcumin-functionalized endotracheal tube and photodynamic action

2020 ◽  
Vol 117 (37) ◽  
pp. 22967-22973
Author(s):  
Amanda C. Zangirolami ◽  
Lucas D. Dias ◽  
Kate C. Blanco ◽  
Carolina S. Vinagreiro ◽  
Natalia M. Inada ◽  
...  
Keyword(s):  
Endotracheal Tube ◽  
Bacterial Infections ◽  
Bacterial Resistance ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Ventilator Associated Pneumonia ◽  
Hospital Acquired Infection ◽  
Hospital Acquired Infections ◽  
Hospitalization Costs ◽  
Hospital Acquired

Hospital-acquired infections are a global health problem that threatens patients’ treatment in intensive care units, causing thousands of deaths and a considerable increase in hospitalization costs. The endotracheal tube (ETT) is a medical device placed in the patient’s trachea to assist breathing and delivering oxygen into the lungs. However, bacterial biofilms forming at the surface of the ETT and the development of multidrug-resistant bacteria are considered the primary causes of ventilator-associated pneumonia (VAP), a severe hospital-acquired infection for significant mortality. Under these circumstances, there has been a need to administrate antibiotics together. Although necessary, it has led to a rapid increase in bacterial resistance to antibiotics. Therefore, it becomes necessary to develop alternatives to prevent and combat these bacterial infections. One possibility is to turn the ETT itself into a bactericide. Some examples reported in the literature present drawbacks. To overcome those issues, we have designed a photosensitizer-containing ETT to be used in photodynamic inactivation (PDI) to avoid bacteria biofilm formation and prevent VAP occurrence during tracheal intubation. This work describes ETT’s functionalization with curcumin photosensitizer, as well as its evaluation in PDI against Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli. A significant photoinactivation (up to 95%) against Gram-negative and Gram-positive bacteria was observed when curcumin-functionalized endotracheal (ETT-curc) was used. These remarkable results demonstrate this strategy’s potential to combat hospital-acquired infections and contribute to fighting antimicrobial resistance.

scholarly journals Emergence of DIM-1 and KPC-1 Genes Associated Carbapenem-Resistant Pseudomonas Aeruginosa Isolates in Three Major Hospitals in Hanoi, Vietnam (2010-2015)

2021 ◽  
Author(s):  
Tran Hai Anh ◽  
Tran Huy Hoang ◽  
Vu Thi Ngoc Bich ◽  
Trinh Son Tung ◽  
Tran Dieu Linh ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Treatment Options ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Phylogenetic Tree Analysis ◽  
Antibiotic Resistant ◽  
Hospital Acquired Infection ◽  
Healthcare Settings ◽  
Carbapenem Resistant ◽  
Hospital Acquired

Abstract Background: Multidrug-resistant bacteria including carbapenem resistant Pseudomonas aeruginosa are recognised as an important cause of hospital-acquired infections worldwide. To determine the molecular characterisation and antibiotic resistant genes associated with carbapenem-resistant P. aeruginosa. Methods: we conducted whole-genome sequencing and phylogenetic analysis of 72 carbapenem-resistant P. aeruginosa isolated from hospital-acquired infection patients from 2010 to 2015 in three major hospitals in Hanoi, Vietnam. Results: We identified three variants of IMP genes, among which IMP-15 gene was the most frequent (n= 34) in comparison to IMP-26 (n= 2) and IMP-51 (n=12). We observed two isolates with imipenem MIC >128mg/L that co-harboured IMP-15 and DIM-1 genes and seven isolates (imipenem MIC> 128mg/L) with KPC-1 gene from the same hospital. MLST data showed that sequence types (ST) of 72 isolates were classified into 18 STs and phylogenetic tree analysis divided these isolates into nine groups. Conclusion: Our results provide evidence that not only IMP-26, but other variants of IMPs like IMP-15 and IMP-51 genes and several STs (ST235, ST244, ST277, ST310, ST773 and ST3151) have been disseminated in health care settings in Vietnam. Also, we report the first finding in Vietnam that two isolates belonging to ST1240 and ST3340 harboured two important carbapenemase genes (IMP-15 and, DIM-1) and seven isolates belonging to ST3151 of P. aeruginosa carried the KPC-1 gene, which could be a potential cause of seriously restricted available treatment options in healthcare settings.

scholarly journals Enterococci as Fecal Indicator in a Tropical Beach: A Case Study

2020 ◽  
Vol 9 (1) ◽  
pp. 53-72
Author(s):  
Fernanda Silva dos Santos ◽  
Luiz Affonso de Paula Junior ◽  
Gabriel Farias Araujo ◽  
Wellington Thadeu de Alcantara Azevedo ◽  
Steven Dutt Ross ◽  
...  
Keyword(s):  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Intertidal Sediment ◽  
Multidrug Resistant Bacteria ◽  
Fecal Indicator ◽  
Hospital Acquired Infections ◽  
Brazilian Legislation ◽  
Resistant Strains ◽  
Hospital Acquired

Fecal enterococci are generally not virulent; however, multidrug-resistant strains have emerged as leading causes of hospital-acquired infections. Thus, periodic enterococci monitoring should be included in highly populated cities to control the dissemination of multidrug-resistant strains to the marine environment. This study aimed to quantify enterococci bacteria from water and intertidal sediment samples in a beach located near Rio de Janeiro touristic spots. We also intended to accomplish if enterococci should be included in touristic beaches sanitary monitoring. Toward this approach, we monitored from August to December 2014 fecal indicator bacteria (FIB) at a beach close to some touristic spots through multiple tube method. Although FIB quantification was within sanitary standards of Brazilian legislation, high enterococci densities (=30 MNP.100 mL-1) were detected in the water collected in August. Thus, enterococci monitoring should be included in touristic beaches to avoid the risk of multidrug-resistant bacteria dissemination among swimmers and beachgoers.

scholarly journals Pathogenesis-Targeted Preventive Strategies for Multidrug Resistant Ventilator-Associated Pneumonia: A Narrative Review

2020 ◽  
Vol 8 (6) ◽  
pp. 821 ◽  
Author(s):  
Antonella Cotoia ◽  
Savino Spadaro ◽  
Guido Gambetti ◽  
Despoina Koulenti ◽  
Gilda Cinnella
Keyword(s):  
Treatment Options ◽  
Multidrug Resistant ◽  
Convincing Evidence ◽  
Narrative Review ◽  
Ventilator Associated Pneumonia ◽  
Effective Prevention ◽  
Hospital Acquired Infection ◽  
Effective Combination ◽  
Oral Decontamination ◽  
Hospital Acquired

Ventilator-associated pneumonia (VAP) is the most common hospital-acquired infection in the intensive care unit (ICU), accounting for relevant morbidity and mortality among critically ill patients, especially when caused by multidrug resistant (MDR) organisms. The rising problem of MDR etiologies, which has led to a reduction in treatment options, have increased clinician’s attention to the employment of effective prevention strategies. In this narrative review we summarized the evidence resulting from 27 original articles that were identified through a systematic database search of the last 15 years, focusing on several pathogenesis-targeted strategies which could help preventing MDR-VAP. Oral hygiene with Chlorhexidine (CHX), CHX body washing, selective oral decontamination (SOD) and/or digestive decontamination (SDD), multiple decontamination regimens, probiotics, subglottic secretions drainage (SSD), special cuff material and shape, silver-coated endotracheal tubes (ETTs), universal use of gloves and contact isolation, alcohol-based hand gel, vaporized hydrogen peroxide, and bundles of care have been addressed. The most convincing evidence came from interventions directly addressed against the key factors of MDR-VAP pathogenesis, especially when they are jointly implemented into bundles. Further research, however, is warranted to identify the most effective combination.

scholarly journals Mortality attributable to hospital acquired infections with multidrug-resistant bacteria in a large group of German hospitals

2020 ◽  
Vol 13 (2) ◽  
pp. 204-210 ◽  
Author(s):  
Alicia Neubeiser ◽  
Marzia Bonsignore ◽  
Sascha Tafelski ◽  
Christof Alefelder ◽  
Karin Schwegmann ◽  
...  
Keyword(s):  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Multidrug Resistant Bacteria ◽  
Hospital Acquired Infections ◽  
Large Group ◽  
Hospital Acquired

scholarly journals Multidrug-Resistant Acinetobacter baumannii Genetic Characterization and Spread in Lithuania in 2014, 2016, and 2018

Life ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 151
Author(s):  
Tatjana Kirtikliene ◽  
Aistė Mierauskaitė ◽  
Ilona Razmienė ◽  
Nomeda Kuisiene
Keyword(s):  
Acinetobacter Baumannii ◽  
Resistance Genes ◽  
Bacterial Infections ◽  
Bacterial Resistance ◽  
Antimicrobial Agents ◽  
Variable Number Tandem Repeat ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Essential Information ◽  
Acinetobacter Spp

Bacterial resistance to antimicrobial agents plays an important role in the treatment of bacterial infections in healthcare institutions. The spread of multidrug-resistant bacteria can occur during inter- and intra-hospital transmissions among patients and hospital personnel. For this reason, more studies must be conducted to understand how resistance occurs in bacteria and how it moves between hospitals by comparing data from different years and looking out for any patterns that might emerge. Multidrug-resistant (MDR) Acinetobacter spp. was studied at 14 healthcare institutions in Lithuania during 2014, 2016, and 2018 using samples from human bloodstream infections. In total, 194 isolates were collected and identified using MALDI-TOF and VITEK2 analyzers as Acinetobacter baumannii group bacteria. After that, the isolates were analyzed for the presence of different resistance genes (20 genes were analyzed) and characterized by using the Rep-PCR and MLVA (multiple-locus variable-number tandem repeat analysis) genotyping methods. The results of the study showed the relatedness of the different Acinetobacter spp. isolates and a possible circulation of resistance genes or profiles during the different years of the study. This study provides essential information, such as variability and diversity of resistance genes, genetic profiling, and clustering of isolates, to better understand the antimicrobial resistance patterns of Acinetobacter spp. These results can be used to strengthen the control of multidrug-resistant infections in healthcare institutions and to prevent potential outbreaks of this pathogen in the future.

scholarly journals Analysis of multidrug-resistant bacteria in 3223 patients with hospital-acquired infections (HAI) from a tertiary general hospital in China

2019 ◽  
Vol 19 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Meng Wang ◽  
Hongyan Wei ◽  
Yaxin Zhao ◽  
Linlin Shang ◽  
Linlin Di ◽  
...  
Keyword(s):  
General Hospital ◽  
Demographic Data ◽  
Tertiary Hospital ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Extended Spectrum Beta Lactamase ◽  
Hospital Acquired Infections ◽  
Resistance Patterns ◽  
Rational Use Of Antibiotics ◽  
Hospital Acquired

The frequency of antimicrobial resistance has increased globally due to misuse and overuse of antibiotics, and multi-drug resistant (MDR) bacteria are now recognized as a major cause of hospital-acquired infections (HAI). Our aim was to investigate the prevalence, distribution, and antimicrobial susceptibility rates of MDR bacteria in patients with HAI from a tertiary hospital in China. We retrospectively evaluated all patients with a confirmed diagnosis of bacterial infection at a tertiary general hospital in Jining, for the period between January 2012 and December 2014. The following clinical and demographic data were collected: age, sex, specimens, treatment, microbiology results, and antibiotic resistance patterns of isolates. Bacterial identification and susceptibility testing were performed using VITEK 2 COMPACT system. We screened a total of 15,588 patients, out of which 7579 (48.6%) had an HAI. MDR showed 3223 out of 7579 isolates (42.5%). The most frequently isolated MDR bacteria in patients with HAI were extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli (n = 1216/3223, 37.7%), MDR Pseudomonas aeruginosa (n = 627/3223, 19.5%) and MDR Acinetobacter baumannii (n = 588/3223, 18.2%). MDR-HAI were more common in males (2074/3223, 64.4%) and in elderly patients (≥60 years; 1196/3223, 37.1%). Sputum was the main source of MDR isolates (2056/3223, 63.8%). Patients with MDR-HAI were predominantly distributed in different types of intensive care units. MDR strains in our study showed resistance to most current antibiotics. Overall, patients with HAI infections attributed to MDR bacteria were widely distributed in our hospital. Enhanced surveillance of MDR bacteria is critical for guiding the rational use of antibiotics and reducing the incidence of HAI.

scholarly journals Carriage of two carbapenem-resistance genes in Pseudomonas aeruginosa isolated from hospital-acquired infections in children from Costa Rica: the importance of local epidemiology

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Cristian Pérez-Corrales ◽  
Valeria Peralta-Barquero ◽  
Christopher Mairena-Acuña
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Costa Rica ◽  
Resistance Genes ◽  
Carbapenem Resistance ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Middle Income ◽  
Hospital Acquired Infections ◽  
Antimicrobial Resistance Genes ◽  
Hospital Acquired

Abstract Background The assessment of Hospital-acquired infections due to multidrug-resistant bacteria involves the use of a variety of commercial and laboratory-developed tests to detect antimicrobial resistance genes in bacterial pathogens; however, few are evaluated for use in low- and middle-income countries. Methods We used whole-genome sequencing, rapid commercial molecular tests, laboratory-developed tests and routine culture testing. Results We identified the carriage of the metallo-β-lactamase blaVIM-2 and blaIMP-18 alleles in Carbapenem-Resistant Pseudomonas aeruginosa infections among children in Costa Rica. Conclusions The blaIMP-18 allele is not present in the most frequently used commercial tests; thus, it is possible that the circulation of this resistance gene may be underdiagnosed in Costa Rica.

scholarly journals Phage Resistance Mechanisms Increase Colistin Sensitivity in Acinetobacter baumannii

2021 ◽  
Author(s):  
Xiaoqing Wang ◽  
Belinda Loh ◽  
Yunsong Yu ◽  
Xiaoting Hua ◽  
Sebastian Leptihn
Keyword(s):  
Bacterial Infections ◽  
Bacterial Resistance ◽  
Phage Therapy ◽  
Resistance Mechanism ◽  
Multidrug Resistant ◽  
Resistance Mechanisms ◽  
Resistant Bacteria ◽  
Phage Resistance ◽  
Colistin Resistance ◽  
Increased Sensitivity

Few emergency-use antibiotics remain for the treatment of multidrug-resistant bacterial infections. Infections with resistant bacteria are becoming increasingly common. Phage therapy has reemerged as a promising strategy to treat such infections, as microbial viruses are not affected by bacterial resistance to antimicrobial compounds. However, phage therapy is impeded by rapid emergence of phage-resistant bacteria during therapy. In this work, we studied phage-resistance of colistin sensitive and resistant A. baumannii strains. Using whole genome sequencing, we determined that phage resistant strains displayed mutations in genes that alter the architecture of the bacterial envelope. In contrast to previous studies where phage-escape mutants showed decreased binding of phages to the bacterial envelope, we obtained several not uninfectable isolates that allowed similar phage adsorption compared to the susceptible strain. When phage-resistant bacteria emerged in the absence of antibiotics, we observed that the colistin resistance levels often decreased, while the antibiotic resistance mechanism per se remained unaltered. In particular the two mutated genes that conveyed phage resistance, a putative amylovoran- biosynthesis and a lipo-oligosaccharide (LOS) biosynthesis gene, impact colistin resistance as the mutations increased sensitivity to the antibiotic.

scholarly journals Infecção do trato urinário causada por Escherichia coli uropatogênica resistente a antibióticos: um importante problema de saúde pública

2021 ◽  
Vol 10 (16) ◽  
pp. e34101623190
Author(s):  
Débora Brito Goulart
Keyword(s):  
Escherichia Coli ◽  
Bacterial Infections ◽  
Bacterial Resistance ◽  
Hospital Costs ◽  
Empirical Therapy ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Antibiotic Resistant ◽  
Preventative Measures ◽  
Health Related

Urinary tract infection (UTI) caused by uropathogenic Escherichia coli (UPEC) is one of the most prevalent bacterial infections and is a major cause of health-related morbidity and hospital costs worldwide. The rising bacterial resistance to routinely given antibiotics for infected individuals is becoming a significant source of concern. Current research shows that UPEC is becoming more resistant to multiple antibiotic classes, including fluoroquinolones, beta-lactams, and aminoglycosides, as a result of genetic determinants of resistance and multidrug-resistant clones. Knowledge of the local etiology and the sensitivity profile of the most common uropathogens to antibiotics should guide decisions in the empirical therapy of uncomplicated UTI. Given the high prevalence of UTI and multidrug-resistant bacteria, preventative measures such as the development of an efficient vaccination are essential. The current work is an integrated literature review that synthesizes information on UTIs caused by antibiotic-resistant uropathogenic E. coli and considers the practical implications of key research results.

Sign in / Sign up

Export Citation Format

Share Document