Highly efficient photothermal nanoparticles for rapid eradication of bacterial biofilms

Nanoscale ◽  
2021 ◽  
Author(s):  
Wei He ◽  
Zaiyu Wang ◽  
Haotian Bai ◽  
Zheng Zhao ◽  
Ryan T. K. Kwok ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Dental Plaque ◽  
Chronic Sinusitis ◽  
Bacterial Biofilms ◽  
Native Valve ◽  
Native Valve Endocarditis ◽  
Highly Efficient ◽  
Airway Infections ◽  
Financial Burdens ◽  
Chronic Airway

Biofilm-related infections such as dental plaque, chronic sinusitis, native valve endocarditis, and chronic airway infections in cystic fibrosis have brought serious suffering to patients and financial burdens to society. Materials...

scholarly journals Genomic and Phenotypic Evolution of Achromobacter xylosoxidans during Chronic Airway Infections of Patients with Cystic Fibrosis

mSystems ◽  
2021 ◽  
Vol 6 (3) ◽  
Author(s):  
S. M. Hossein Khademi ◽  
Migle Gabrielaite ◽  
Magnus Paulsson ◽  
Mattis Knulst ◽  
Eleni Touriki ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Bacterial Infections ◽  
Bacterial Genome ◽  
Bacterial Pathogen ◽  
Achromobacter Xylosoxidans ◽  
Phenotypic Evolution ◽  
Unique Challenge ◽  
Human Host ◽  
Airway Infections ◽  
Chronic Airway

A thorough understanding of bacterial pathogen adaptation is essential for the treatment of chronic bacterial infections. One unique challenge in the analysis and interpretation of genomics data is identifying the function impact of mutations accumulated in the bacterial genome during colonization in the human host.

Chronic airway colonization by Penicillium emersonii in a patient with cystic fibrosis

1999 ◽  
Vol 37 (4) ◽  
pp. 291-293 ◽  
Author(s):  
B. Cimon ◽  
J. Carrere ◽  
J. P. Chazalette ◽  
J. F. Vinatier ◽  
D. Chabasse ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Airway Colonization ◽  
Chronic Airway

Surgery for infective native valve endocarditis

2013 ◽  
Vol 61 (S 01) ◽  
Author(s):  
M Wilbring ◽  
SM Tugtekin ◽  
K Matschke
Keyword(s):  
Native Valve ◽  
Native Valve Endocarditis

Anti-Pseudomonas aeruginosa IgG Antibodies and Chronic Airway Infection in Non-Cystic Fibrosis Bronchiectasis

Pneumologie ◽  
2016 ◽  
Vol 70 (10) ◽  
Author(s):  
G Suarez-Cuartin ◽  
O Sibila ◽  
A Smith ◽  
H Abo-Leyah ◽  
A Rodrigo-Troyano ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Pseudomonas Aeruginosa ◽  
Igg Antibodies ◽  
Airway Infection ◽  
Chronic Airway

The Role of the Coagulase-negative Staphylococci (CoNS) in Infective Endocarditis; A Narrative Review from 2000 to 2020

2020 ◽  
Vol 21 (12) ◽  
pp. 1140-1153 ◽  
Author(s):  
Mohammad A. Noshak ◽  
Mohammad A. Rezaee ◽  
Alka Hasani ◽  
Mehdi Mirzaii
Keyword(s):  
Foreign Body ◽  
Infective Endocarditis ◽  
Prosthetic Valve ◽  
Human Life ◽  
Prosthetic Valve Endocarditis ◽  
Surgical Site Infections ◽  
Coagulase Negative Staphylococci ◽  
Native Valve ◽  
Native Valve Endocarditis

Coagulase-negative staphylococci (CoNS) are part of the microbiota of human skin and rarely linked with soft tissue infections. In recent years, CoNS species considered as one of the major nosocomial pathogens and can cause several infections such as catheter-acquired sepsis, skin infection, urinary tract infection, endophthalmitis, central nervous system shunt infection, surgical site infections, and foreign body infection. These microorganisms have a significant impact on human life and health and, as typical opportunists, cause peritonitis in individuals undergoing peritoneal dialysis. Moreover, it is revealed that these potential pathogens are mainly related to the use of indwelling or implanted in a foreign body and cause infective endocarditis (both native valve endocarditis and prosthetic valve endocarditis) in patients. In general, approximately eight percent of all cases of native valve endocarditis is associated with CoNS species, and these organisms cause death in 25% of all native valve endocarditis cases. Moreover, it is revealed that methicillin-resistant CoNS species cause 60 % of all prosthetic valve endocarditis cases. In this review, we describe the role of the CoNS species in infective endocarditis, and we explicated the reported cases of CoNS infective endocarditis in the literature from 2000 to 2020 to determine the role of CoNS in the process of infective endocarditis.

Rhinosinusitis in the Pediatric Patient with Cystic Fibrosis

2014 ◽  
Vol 10 (3) ◽  
pp. 198-201 ◽  
Author(s):  
Christopher Fundakowski ◽  
Rosemary Ojo ◽  
Ramzi Younis
Keyword(s):  
Cystic Fibrosis ◽  
Autosomal Recessive ◽  
Pediatric Patients ◽  
Surgical Intervention ◽  
Chronic Sinusitis ◽  
Genetic Disorder ◽  
Symptomatic Relief ◽  
Recurrence Rates ◽  
Polyp Recurrence ◽  
Sinonasal Polyposis

Cystic fibrosis (CF) is a common autosomal recessive genetic disorder where a deletion mutation and subsequent downstream alteration in transmembrane regulator proteins results in increased mucus viscosity. CF manifests clinically with chronic multisystem inflammation and recurrent infections. Nearly all children with CF have chronic sinusitis, and a large majority will have concurrent sinonasal polyposis. Chronic sinusitis and sinonasal polyposis in pediatric patients with CF can be managed conservatively initially, though most will fail medical management and require surgical intervention. Unfortunately, symptom resolution is marginal and polyp recurrence rates are high. Currently, no cure exists for CF and the mainstay of treatment is to provide symptomatic relief, and minimize disease morbidity.

scholarly journals Pseudomonas aeruginosa PA14 Enhances the Efficacy of Norfloxacin against Staphylococcus aureus Newman Biofilms

2020 ◽  
Vol 202 (18) ◽  
Author(s):  
Giulia Orazi ◽  
Fabrice Jean-Pierre ◽  
George A. O’Toole
Keyword(s):  
Cystic Fibrosis ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Agents ◽  
Respiratory Infections ◽  
Multiple Infection ◽  
Bacterial Biofilms ◽  
Interspecies Interactions ◽  
Chronic Infections ◽  
Content Type

ABSTRACT The thick mucus within the airways of individuals with cystic fibrosis (CF) promotes frequent respiratory infections that are often polymicrobial. Pseudomonas aeruginosa and Staphylococcus aureus are two of the most prevalent pathogens that cause CF pulmonary infections, and both are among the most common etiologic agents of chronic wound infections. Furthermore, the ability of P. aeruginosa and S. aureus to form biofilms promotes the establishment of chronic infections that are often difficult to eradicate using antimicrobial agents. In this study, we found that multiple LasR-regulated exoproducts of P. aeruginosa, including 2-heptyl-4-hydroxyquinoline N-oxide (HQNO), siderophores, phenazines, and rhamnolipids, likely contribute to the ability of P. aeruginosa PA14 to shift S. aureus Newman norfloxacin susceptibility profiles. Here, we observe that exposure to P. aeruginosa exoproducts leads to an increase in intracellular norfloxacin accumulation by S. aureus. We previously showed that P. aeruginosa supernatant dissipates the S. aureus membrane potential, and furthermore, depletion of the S. aureus proton motive force recapitulates the effect of the P. aeruginosa PA14 supernatant on shifting norfloxacin sensitivity profiles of biofilm-grown S. aureus Newman. From these results, we hypothesize that exposure to P. aeruginosa PA14 exoproducts leads to increased uptake of the drug and/or an impaired ability of S. aureus Newman to efflux norfloxacin. Surprisingly, the effect observed here of P. aeruginosa PA14 exoproducts on S. aureus Newman susceptibility to norfloxacin seemed to be specific to these strains and this antibiotic. Our results illustrate that microbially derived products can alter the ability of antimicrobial agents to kill bacterial biofilms. IMPORTANCE Pseudomonas aeruginosa and Staphylococcus aureus are frequently coisolated from multiple infection sites, including the lungs of individuals with cystic fibrosis (CF) and nonhealing diabetic foot ulcers. Coinfection with P. aeruginosa and S. aureus has been shown to produce worse outcomes compared to infection with either organism alone. Furthermore, the ability of these pathogens to form biofilms enables them to cause persistent infection and withstand antimicrobial therapy. In this study, we found that P. aeruginosa-secreted products dramatically increase the ability of the antibiotic norfloxacin to kill S. aureus biofilms. Understanding how interspecies interactions alter the antibiotic susceptibility of bacterial biofilms may inform treatment decisions and inspire the development of new therapeutic strategies.

Paranasal Sinus Development in Chronic Sinusitis, Cystic Fibrosis, and Normal Comparison Population: A Computerized Tomography Correlation Study

1997 ◽  
Vol 11 (4) ◽  
pp. 275-282 ◽  
Author(s):  
Hung Jeff Kim ◽  
Ellen M. Friedman ◽  
Marcelle Sulek ◽  
Newton O. Duncan ◽  
Charles McCluggage
Keyword(s):  
Cystic Fibrosis ◽  
Maxillary Sinus ◽  
Paranasal Sinus ◽  
Chronic Sinusitis ◽  
Correlation Study ◽  
Uncinate Process ◽  
Ct Scans ◽  
Lateral Nasal Wall ◽  
Transverse Diameter ◽  
Sinus Disease

Chronic sinus disease in patients with and without cystic fibrosis may have an impact on the pattern of paranasal sinus pneumatization. Arrest of pneumatization has been reported in both of these conditions. To assess the development of the paranasal sinuses in relationship to chronic sinusitis and cystic fibrosis (CF), a retrospective review of coronal CT scans of the age-matched patients with no previous sinus disease, patients with chronic sinusitis, and cystic fibrosis patients was conducted. The patients’ ages ranged from 4 to 17 years. The maxillary sinus volume, anteroposterior diameter, and greatest transverse diameter and height were determined using image analysis software after the coronal CT scans were scanned into Macintosh computer. The size of the maxillary sinus increased with advancing age in the control and chronic sinusitis group, but not in the patients with cystic fibrosis. The patients with cystic fibrosis had a statistically significant smaller maxillary sinus size. Approximately 50% of the patients with chronic sinusitis had anatomic anomalies, the most common being paradoxical middle turbinates. The CT scans of CF patients were characterized by uncinate process demineralization and medial displacement of the lateral nasal wall in the middle meatus, and decreased maxillary sinus pneumatization.

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