scholarly journals Clinical Biofilm Ring Test® Reveals the Potential Role of β-Lactams in the Induction of Biofilm Formation by P. aeruginosa in Cystic Fibrosis Patients

Pathogens ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1065
Author(s):  
Elodie Olivares ◽  
Jason Tasse ◽  
Stéphanie Badel-Berchoux ◽  
Christian Provot ◽  
Gilles Prévost ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Bacterial Adhesion ◽  
Biofilm Formation ◽  
Potential Role ◽  
Bacterial Biomass ◽  
Ring Test ◽  
Antimicrobial Treatments ◽  
Syto 9 ◽  
Producer Strains

Biofilms are characterized by high tolerance to antimicrobials. However, conventional antibiograms are performed on planktonic microorganisms. Through the clinical Biofilm Ring Test® (cBRT), initially aimed to measure the adhesion propensity of bacteria, we discerned a variable distribution of biofilm-producer strains among P. aeruginosa samples isolated from expectorations of cystic fibrosis (CF) patients. Despite a majority of spontaneous adherent isolates, few strains remained planktonic after 5 h of incubation. Their analysis by an adapted protocol of the cBRT revealed an induction of the biofilm early formation by sub-inhibitory doses of β-lactams. Microscopic observations of bacterial cultures stained with Syto 9/Propidium Iodide (PI) confirmed the ability of antimicrobials to increase either the bacterial biomass or the biovolume occupied by induced sessile cells. Finally, the cBRT and its derivatives enabled to highlight in a few hours the potential inducer property of antibiotics on bacterial adhesion. This phenomenon should be considered carefully in the context of CF since patients are constantly under fluctuating antimicrobial treatments. To conclude, assays derived from the Biofilm Ring Test® (BRT) device, not only define efficient doses preventing biofilm formation, but could be useful for the antimicrobial selection in CF, to avoid inducer molecules of the early biofilm initiation.

scholarly journals The Potential Role of Bacteriophages in the Treatment of Recalcitrant Chronic Rhinosinusitis

Antibiotics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 675
Author(s):  
Saartje Uyttebroek ◽  
Jolien Onsea ◽  
Willem-Jan Metsemakers ◽  
Lieven Dupont ◽  
David Devolder ◽  
...  
Keyword(s):  
Chronic Rhinosinusitis ◽  
Biofilm Formation ◽  
Potential Role ◽  
Phage Therapy ◽  
Well Being ◽  
Treatment Alternative ◽  
Surgical Interventions ◽  
Social And Emotional ◽  
Promising Treatment

Chronic rhinosinusitis is a common condition affecting 5–12% of the general population worldwide. In a limited number of cases, the disease is recalcitrant to medical and surgical interventions, causing a major impact on physical, social and emotional well-being and increasing pressure on healthcare systems. Biofilm formation and dysbiosis caused by Staphylococcus aureus and Pseudomonas aeruginosa play a role in the pathogenesis of recalcitrant chronic rhinosinusitis. In these cases, a promising treatment alternative is the application of bacteriophages, which are viruses that infect and lyse bacteria. In this review, we appraise the evidence for the use of bacteriophages in the treatment of recalcitrant chronic rhinosinusitis. Additionally, (dis)advantages of bacteriophages and considerations for implementation of phage therapy in otorhinolaryngology practice will be discussed.

Potential role of the cellular allergen stimulation test (CAST) in diagnosis of allergic bronchopulmonary aspergillosis (ABPA) in cystic fibrosis

2007 ◽  
Vol 42 (4) ◽  
pp. 314-318 ◽  
Author(s):  
Stephanie Ringer ◽  
Uta-Christina Hipler ◽  
Peter Elsner ◽  
Felix Zintl ◽  
Jochen Mainz
Keyword(s):  
Cystic Fibrosis ◽  
Potential Role ◽  
Allergic Bronchopulmonary Aspergillosis ◽  
Stimulation Test

The role of bacterial adhesion in cystic fibrosis including the Staphylococcal aspect

Infection ◽  
1990 ◽  
Vol 18 (1) ◽  
pp. 61-64 ◽  
Author(s):  
R. Ramphal
Keyword(s):  
Cystic Fibrosis ◽  
Bacterial Adhesion

scholarly journals Biofilm Formation in Methicillin-Resistant Staphylococcus aureus Isolated in Cystic Fibrosis Patients Is Strain-Dependent and Differentially Influenced by Antibiotics

2021 ◽  
Vol 12 ◽  
Author(s):  
Agathe Boudet ◽  
Pauline Sorlin ◽  
Cassandra Pouget ◽  
Raphaël Chiron ◽  
Jean-Philippe Lavigne ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Staphylococcus Aureus ◽  
Biofilm Formation ◽  
Multidrug Resistant ◽  
Inhibitory Effect ◽  
Ring Test ◽  
Methicillin Resistant ◽  
Lung Dysfunction ◽  
Chronic Colonization ◽  
Strain Dependent

Cystic fibrosis (CF) is a genetic disease with lung abnormalities making patients particularly predisposed to pulmonary infections. Staphylococcus aureus is the most frequently identified pathogen, and multidrug-resistant strains (MRSA, methicillin-resistant S. aureus) have been associated with more severe lung dysfunction leading to eradication recommendations. Diverse bacterial traits and adaptive skills, including biofilm formation, may, however, make antimicrobial therapy challenging. In this context, we compared the ability of a collection of genotyped MRSA isolates from CF patients to form biofilm with and without antibiotics (ceftaroline, ceftobiprole, linezolid, trimethoprim, and rifampicin). Our study used standardized approaches not previously applied to CF MRSA, the BioFilm Ring test® (BRT®), the Antibiofilmogram®, and the BioFlux™ 200 system which were adapted for use with the artificial sputum medium (ASM) mimicking conditions more relevant to the CF lung. We included 63 strains of 10 multilocus sequence types (STs) isolated from 35 CF patients, 16 of whom had chronic colonization. The BRT® showed that 27% of the strains isolated in 37% of the patients were strong biofilm producers. The Antibiofilmogram® performed on these strains showed that broad-spectrum cephalosporins had the lowest minimum biofilm inhibitory concentrations (bMIC) on a majority of strains. A focus on four chronically colonized patients with inclusion of successively isolated strains showed that ceftaroline, ceftobiprole, and/or linezolid bMICs may remain below the resistance thresholds over time. Studying the dynamics of biofilm formation by strains isolated 3years apart in one of these patients using BioFlux™ 200 showed that inhibition of biofilm formation was observed for up to 36h of exposure to bMIC and ceftaroline and ceftobiprole had a significantly greater effect than linezolid. This study has brought new insights into the behavior of CF MRSA which has been little studied for its ability to form biofilm. Biofilm formation is a common characteristic of prevalent MRSA clones in CF. Early biofilm formation was strain-dependent, even within a sample, and not only observed during chronic colonization. Ceftaroline and ceftobiprole showed a remarkable activity with a long-lasting inhibitory effect on biofilm formation and a conserved activity on certain strains adapted to the CF lung environment after years of colonization.

scholarly journals Case Report: Dual nebulised antibiotics among adults with cystic fibrosis and chronic Pseudomonas infection

F1000Research ◽  
2017 ◽  
Vol 6 ◽  
pp. 2079
Author(s):  
Nina Mann ◽  
Shirley Murray ◽  
Zhe Hui Hoo ◽  
Rachael Curley ◽  
Martin J. Wildman
Keyword(s):  
Cystic Fibrosis ◽  
Case Report ◽  
Adverse Effects ◽  
Best Practice ◽  
Potential Role ◽  
Concomitant Administration ◽  
Intravenous Antibiotics ◽  
Inhaled Antibiotics ◽  
Pseudomonas Infection

Pulmonary exacerbations in adults with cystic fibrosis (CF) and chronic Pseudomonas aeruginosa (Psae) infection are usually treated with dual intravenous antibiotics for 14 days, despite the lack of evidence for best practice. Intravenous antibiotics are commonly associated with various systemic adverse effects, including renal failure and ototoxicity. Inhaled antibiotics are less likely to cause systematic adverse effects, yet can achieve airway concentrations well above conventional minimum inhibitory concentrations. Typically one inhaled antibiotic is used at a time, but dual inhaled antibiotics (i.e. concomitant use of two different inhaled antibiotics) may have synergistic effect and achieve better results in the treatment of exacerbations. We presented anecdotal evidence for the use of dual inhaled antibiotics as an acute treatment for exacerbations, in the form of a case report. A female in her early thirties with CF and chronic Psae infection improved her FEV1 by 5% and 2% with two courses of dual inhaled antibiotics to treat exacerbations in 2016. In contrast, her FEV1 changed by 2%, –2%, 0% and 2%, respectively, with four courses of dual intravenous antibiotics in 2016. Baseline FEV1 was similar prior to all six courses of treatments. The greater FEV1 improvements with dual inhaled antibiotics compared to dual intravenous antibiotics suggest the potential role of using dual inhaled antibiotics to treat exacerbations among adults with CF and chronic Psae infection, especially since a greater choice of inhaled anti-pseudomonal antibiotics is now available. A previous study in 1985 has looked at the concomitant administration of inhaled tobramycin and carbenicillin, by reconstituting antibiotics designed for parenteral administration. To our knowledge, this is the first literature to describe the concomitant use of two different antibiotics specifically developed for delivery via the inhaled route.

scholarly journals Cystic fibrosis as a bowel cancer syndrome and the potential role of CK2

2008 ◽  
Vol 316 (1-2) ◽  
pp. 169-175 ◽  
Author(s):  
Anil Mehta
Keyword(s):  
Cystic Fibrosis ◽  
Potential Role ◽  
Bowel Cancer ◽  
Cancer Syndrome

scholarly journals Potential Role of High-Mobility Group Box 1 in Cystic Fibrosis Airway Disease

2008 ◽  
Vol 178 (8) ◽  
pp. 822-831 ◽  
Author(s):  
Steven M. Rowe ◽  
Patricia L. Jackson ◽  
Gang Liu ◽  
Mathew Hardison ◽  
Alessandra Livraghi ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Potential Role ◽  
High Mobility ◽  
Airway Disease ◽  
High Mobility Group ◽  
Cystic Fibrosis Airway

Potential role of macrolide antibiotics in the management of cystic fibrosis lung disease

2002 ◽  
Vol 8 (6) ◽  
pp. 521-528 ◽  
Author(s):  
Thao Nguyen ◽  
Stan G. Louie ◽  
Paul M. Beringer ◽  
Mark A. Gill
Keyword(s):  
Cystic Fibrosis ◽  
Lung Disease ◽  
Potential Role ◽  
Cystic Fibrosis Lung ◽  
Macrolide Antibiotics ◽  
Cystic Fibrosis Lung Disease
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