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chronic rhinosinusitis and biofilm

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https://www.readbyqxmd.com/read/28894821/the-role-of-infection-and-antibiotics-in-chronic-rhinosinusitis
#1
REVIEW
Miriam Baron Barshak, Marlene L Durand
OBJECTIVE: To review the current understanding of the role of infection and antibiotics in chronic rhinosinusitis. REVIEW METHODS: PubMed literature search. RESULTS: Chronic rhinosinusitis (CRS) in adults is an inflammatory condition and the role of infection is unclear. Biofilms are present in both CRS and normal patients so their role in CRS is unknown. Sinus cultures in CRS demonstrate a mixture of aerobic and anaerobic bacteria but may be hard to interpret due to contaminating nasal flora...
February 2017: Laryngoscope Investigative Otolaryngology
https://www.readbyqxmd.com/read/28887201/reactive-oxygen-therapy-a-novel-antimicrobial
#2
REVIEW
Matthew Dryden
The main solution to the global antibiotic resistance crisis is reducing the volume of antibiotic use in medicine, agriculture and the environment. However there is also a pressing need for novel antimicrobials. Despite much rhetoric, there are few entirely novel agents in development. One such therapy to reach clinical use is an agent using Reactive Oxygen Species (ROS), oxygen radicals, as an antimicrobial mechanism. ROS can be delivered to the site of infection in various formats. ROS is highly antimicrobial against Gram positive and negative bacteria, viruses and fungi...
September 5, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28736916/hyaluronate-effect-on-bacterial-biofilm-in-ent-district-infections-a-review
#3
REVIEW
Alberto Vito Marcuzzo, Margherita Tofanelli, Francesca Boscolo Nata, Annalisa Gatto, Giancarlo Tirelli
Bacterial resistance is a growing phenomenon which led the scientific community to search for new therapeutic targets, such as biofilm. A bacterial biofilm is a surface-associated agglomerate of microorganisms embedded in a self-produced extracellular polymeric matrix made of polysaccharides, nucleic acids, and proteins. Scientific literature offers several reports on a biofilm's role in infections regarding various body districts. The presence of a bacterial biofilm is responsible for poor efficacy of antibiotic therapies along with bacterial infections in ear, nose, and throat (ENT) districts such as the oral cavity, ear, nasal cavities, and nasal sinuses...
September 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28696280/nontypeable-haemophilus-influenzae-releases-dna-and-dnabii-proteins-via-a-t4ss-like-complex-and-come-of-the-type-iv-pilus-machinery
#4
Joseph A Jurcisek, Kenneth L Brockman, Laura A Novotny, Steven D Goodman, Lauren O Bakaletz
Biofilms formed by nontypeable Haemophilus influenzae (NTHI) are central to the chronicity, recurrence, and resistance to treatment of multiple human respiratory tract diseases including otitis media, chronic rhinosinusitis, and exacerbations of both cystic fibrosis and chronic obstructive pulmonary disease. Extracellular DNA (eDNA) and associated DNABII proteins are essential to the overall architecture and structural integrity of biofilms formed by NTHI and all other bacterial pathogens tested to date. Although cell lysis and outer-membrane vesicle extrusion are possible means by which these canonically intracellular components might be released into the extracellular environment for incorporation into the biofilm matrix, we hypothesized that NTHI additionally used a mechanism of active DNA release...
August 8, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28602067/bacterial-ball-as-an-unusual-finding-in-patients-with-chronic-rhinosinusitis
#5
Dong-Kyu Kim, Young Chan Wi, Su-Jin Shin, Youn Il Jang, Kyung Rae Kim, Seok Hyun Cho
Objectives: Pathophysiology of chronic rhinosinusitis (CRS) is very complex and has not yet been clearly understood. To date, various factors have been researched to have relations with the pathogenesis of CRS, such as superantigens and biofilms. Recently, we found an unusual pathological finding in patients with CRS, and we called this new entity as bacteria ball (or bioball). In this study, we analyze the clinical characteristics of bacteria ball occurred in CRS. Methods: This study enrolled consecutive 247 patients with CRS who underwent functional endoscopic sinus surgery from January 2015 to August 2016...
June 6, 2017: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/28435269/efficacy-of-silk-fibroin-nano-silver-against-staphylococcus-aureus-biofilms-in-a-rabbit-model-of-sinusitis
#6
Minghui Jia, Zhongchun Chen, Yongwei Guo, Xin Chen, Xia Zhao
BACKGROUND: Staphylococcus aureus biofilms contribute significantly to the recalcitrant nature of chronic rhinosinusitis. In previous studies, it has been shown that silk fibroin-nano silver solution can eliminate S. aureus biofilms in vitro, which suggests a potential role of this novel agent in the treatment of biofilm-associated diseases, such as sinusitis. OBJECTIVE: The aim of this study was to investigate the efficacy of silk fibroin-nano silver solution as a topical anti-biofilm agent in a rabbit model of sinusitis...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28389992/detection-of-biofilms-in-biopsies-from-chronic-rhinosinusitis-patients-in-vitro-biofilm-forming-ability-and-antimicrobial-susceptibility-testing-in-biofilm-mode-of-growth-of-isolated-bacteria
#7
Mariagrazia Di Luca, Elena Navari, Semih Esin, Melissa Menichini, Simona Barnini, Andrej Trampuz, Augusto Casani, Giovanna Batoni
Chronic rhinosinusitis (CRS) is the most common illness among chronic disorders that remains poorly understood from a pathogenic standpoint and has a significant impact on patient quality of life, as well as healthcare costs. Despite being widespread, little is known about the etiology of the CRS. Recent evidence, showing the presence of biofilms within the paranasal sinuses, suggests a role for biofilm in the pathogenesis. To elucidate the role of biofilm in the pathogenesis of CRS, we assessed the presence of biofilm at the infection site and the ability of the aerobic flora isolated from CRS patients to form biofilm in vitro...
April 8, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28333393/laser-generated-shockwaves-enhance-antibacterial-activity-against-biofilms-in-vitro
#8
William Yao, Edward C Kuan, Nathan C Francis, Maie A St John, Warren S Grundfest, Zachary D Taylor
BACKGROUND AND OBJECTIVES: Bacterial biofilm formation within chronic wound beds, which provides an effective barrier against antibiotics, is a known cause of recalcitrant infections and a significant healthcare burden, often requiring repeated surgical debridements. Laser-generated shockwaves (LGS) is a novel, minimally invasive, and nonthermal modality for biofilm mechanical debridement which utilizes compressive stress waves, generated by photonic absorption in thin titanium films to mechanically disrupt the biofilm...
March 23, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28286740/long-term-safety-of-topical-bacteriophage-application-to-the-frontal-sinus-region
#9
Amanda J Drilling, Mian L Ooi, Dijana Miljkovic, Craig James, Peter Speck, Sarah Vreugde, Jason Clark, Peter-John Wormald
Background:Staphylococcus aureus biofilms contribute negatively to a number of chronic conditions, including chronic rhinosinusitis (CRS). With the inherent tolerance of biofilm-bound bacteria to antibiotics and the global problem of bacterial antibiotic resistance, the need to develop novel therapeutics is paramount. Phage therapy has previously shown promise in treating sinonasal S. aureus biofilms. Methods: This study investigates the long term (20 days) safety of topical sinonasal flushes with bacteriophage suspensions...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28218655/taste-receptors-mediate-sinonasal-immunity-and-respiratory-disease
#10
REVIEW
Jennifer E Douglas, Noam A Cohen
The bitter taste receptor T2R38 has been shown to play a role in the pathogenesis of chronic rhinosinusitis (CRS), where the receptor functions to enhance upper respiratory innate immunity through a triad of beneficial immune responses. Individuals with a functional version of T2R38 are tasters for the bitter compound phenylthiocarbamide (PTC) and exhibit an anti-microbial response in the upper airway to certain invading pathogens, while those individuals with a non-functional version of the receptor are PTC non-tasters and lack this beneficial response...
February 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28116488/antibiofilm-effects-of-topical-corticosteroids-and-intranasal-saline-in-patients-with-chronic-rhinosinusitis-with-nasal-polyps-depend-on-bacterial-species-and-their-biofilm-forming-capacity
#11
Ivana Cirkovic, Bojan Pavlovic, Dragana D Bozic, Ana Jotic, Ljubica Bakic, Jovica Milovanovic
Microbial biofilms have been implicated in the pathogenesis of chronic rhinosinusitis with nasal polyposis (CRSwNP). Intranasal application of corticosteroids and saline is a reliable option for their management. The aim of our study was to evaluate in vitro antibiofilm effects of corticosteroids and isotonic and hypertonic nasal saline in CRSwNP patients. The sinus mucosal specimens were harvested from the ethmoid cavity of 48 patients with CRSwNP and further subjected to hematoxylin-eosin staining and microbiology analysis...
April 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28095898/differences-in-rantes-and-il-6-levels-among-chronic-rhinosinusitis-patients-with-predominant-gram-negative-and-gram-positive-infection
#12
Almoaidbellah Rammal, Marc Tewfik, Simon Rousseau
BACKGROUND: Bacteria are suspected players in the pathogenesis of chronic rhinosinusitis (CRS), yet their exact role is not understood. We investigated the effect of planktonic and biofilm of staphylococcus aureus (SA) and Pseudomonas aeruginosa (PA) on the mucosa of CRS patients with gram-positive and gram-negative infections by measuring the levels of IL-6 and RANTES, a chemokine with activity on eosinophils and T lymphocytes. METHODS: Ethmoid mucosa of six CRS patients with gram-positive bacteria on culture and five with gram-negative bacteria were compared to ethmoid mucosa of 8 control patients...
January 17, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/27935259/manuka-honey-sinus-irrigation-for-the-treatment-of-chronic-rhinosinusitis-a-randomized-controlled-trial
#13
Victoria S Lee, Ian M Humphreys, Patricia L Purcell, Greg E Davis
BACKGROUND: Manuka honey (MH) has been shown in vitro to be effective against biofilm-producing bacteria. This study assessed the effectiveness of MH for patients with active chronic rhinosinusitis (CRS) and prior sinus surgery. METHODS: This prospective single-blinded (clinician only) randomized controlled trial recruited patients with active CRS and prior sinus surgery. Patients received either MH or saline (SAL) sinus irrigations twice daily for 30 days and were offered oral antibiotics and/or oral/topical steroids as indicated...
December 9, 2016: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/27888915/biofilm-and-osteitis-in-refractory-chronic-rhinosinusitis
#14
REVIEW
Yi Chen Zhao, Peter-John Wormald
Our understanding of chronic rhinosinusitis (CRS) show biofilm and osteitis play a role in the disease's pathogenesis and refractory. Studies point to its role in pathogenesis and poor prognosis. Outside the research laboratory, biofilm detection remains difficult and specific treatment remains elusive. It is believed that osteitis is a nidus of inflammation and occurs more commonly in patients with refractory CRS. However, osteitis may be exacerbated by surgery and a marker of refractory disease, not a causative agent...
February 2017: Otolaryngologic Clinics of North America
https://www.readbyqxmd.com/read/27810560/intranasal-delivery-of-ciprofloxacin-to-rats-a-topical-approach-using-a-thermoreversible-in-situ-gel
#15
Joana Sousa, Gilberto Alves, Paula Oliveira, Ana Fortuna, Amílcar Falcão
Intranasal administration of antibiotics is an alternative and attractive delivery approach in the treatment of local infections such as chronic rhinosinusitis. This topical route has the advantage of delivering high drug concentrations directly to the site of infection when trying to eradicate the highly resistant bacterial biofilms. The purpose of this study was to assess and compare the pharmacokinetic parameters of ciprofloxacin following intranasal and intravenous administrations to rats in plasma, olfactory bulb and nasal mucosa of two different nasal regions...
January 15, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27650657/the-genetics-of-the-bitter-taste-receptor-t2r38-in-upper-airway-innate-immunity-and-implications-for-chronic-rhinosinusitis
#16
Noam A Cohen
OBJECTIVE: Chronic rhinosinusitis (CRS) refractory to therapeutic intervention may involve a particularly resistant infection known as a bacterial biofilm. Critical to biofilm formation is the microbial process of quorum sensing whereby microbes secrete factors that regulate the expression of microbial genes involved in biofilm formation, persistence, and virulence. Here, we review recent work demonstrating that the bitter taste receptor T2R38, expressed on the apical surface of the sinonasal epithelium, serves a sentinel role in eavesdropping on microbial quorum-sensing communications and regulates localized innate biocidal defenses...
January 2017: Laryngoscope
https://www.readbyqxmd.com/read/27492531/the-effect-of-n-acetylcysteine-on-biofilms-implications-for-the-treatment-of-respiratory-tract-infections
#17
REVIEW
Francesco Blasi, Clive Page, Gian Maria Rossolini, Lucia Pallecchi, Maria Gabriella Matera, Paola Rogliani, Mario Cazzola
OBJECTIVES: In airway infections, biofilm formation has been demonstrated to be responsible for both acute and chronic events, and constitutes a genuine challenge in clinical practice. Difficulty in eradicating biofilms with systemic antibiotics has led clinicians to consider the possible role of non-antibiotic therapy. The aim of this review is to examine current evidence for the use of N-acetylcysteine (NAC) in the treatment of biofilm-related respiratory infections. METHODS: Electronic searches of PUBMED up to September 2015 were conducted, searching for 'biofilm', 'respiratory tract infection', 'N-acetylcysteine', 'cystic fibrosis', 'COPD', 'bronchiectasis', 'otitis', and 'bronchitis' in titles and abstracts...
August 2016: Respiratory Medicine
https://www.readbyqxmd.com/read/27442398/adenoid-vegetations-reservoir-of-bacteria-for-chronic-otitis-media-with-effusion-and-chronic-rhinosinusitis
#18
Marina Davcheva-Chakar, Ana Kaftandzhieva, Beti Zafirovska
INTRODUCTION: Otitis media and rhinosinusitis are commonly encountered illnesses in pediatric population. Literature reports have documented the association between the occurrence of these two conditions and even their almost identical microbiological findings. Until recently, the key factor in the association of these two conditions was considered to be the hypertrophic adenoid tissue, but within the past few years there have been evidences in the literature about the presence of bacterial biofilms on the adenoids suggesting biofilms to be also responsible for both conditions, chronic otitis media with effusion and chronic rhinosinusitis...
2015: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
https://www.readbyqxmd.com/read/27394715/the-in-vitro-effect-of-xylitol-on-chronic-rhinosinusitis-biofilms
#19
R Jain, T Lee, T Hardcastle, K Biswas, F Radcliff, R Douglas
INTRODUCTION: Biofilms have been implicated in chronic rhinosinusitis (CRS) and may explain the limited efficacy of antibiotics. There is a need to find more effective, non-antibiotic based therapies for CRS. This study examines the effects of xylitol on CRS biofilms and planktonic bacteria. METHODS: Crystal violet assay and spectrophotometry were used to quantify the effects of xylitol (5% and 10% solutions) against Staphylococcus epidermidis, Pseudomonas aeruginosa, and Staphylococcus aureus...
December 1, 2016: Rhinology
https://www.readbyqxmd.com/read/27393776/other-phenotypes-and-treatment-of-chronic-rhinosinusitis
#20
Robert M Naclerio, Fuad M Baroody
Chronic rhinosinusitis (CRS) is difficult to define, partly because the disease recognized by clinicians is both heterogeneous and the endpoint of different pathophysiologic, genetic, and environmental interactions. For this article, we define CRS as symptoms lasting more than 3 months combined with an imaging study showing inflammation in the sinuses. This article comments on some factors that are believed to influence the expression of CRS. These factors include anatomic abnormalities, immotile cilia, age, allergic sensitization, immune deficiency, dental infections, gastrointestinal reflux, smoking, biofilm, and the microbiome...
July 2016: Journal of Allergy and Clinical Immunology in Practice
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