1
|
Qin X, Zhao H, Qin W, Qin X, Shen S, Wang H. Efficacy of expanded periurethral cleansing in reducing catheter-associated urinary tract infection in comatose patients: a randomized controlled clinical trial. Crit Care 2024; 28:162. [PMID: 38741134 DOI: 10.1186/s13054-024-04947-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Accepted: 05/08/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND The effect of the periurethral cleansing range on catheter-associated urinary tract infection (CAUTI) occurrence remains unknown. The purpose of this study was to evaluate the efficacy of expanded periurethral cleansing for reducing CAUTI in comatose patients. METHODS In this randomized controlled trial, eligible patients in our hospital were enrolled and allocated randomly to the experimental group (expanded periurethral cleansing protocol; n = 225) or the control group (usual periurethral cleansing protocol; n = 221). The incidence of CAUTI on days 3, 7, and 10 after catheter insertion were compared, and the pathogen results and influencing factors were analyzed. RESULTS The incidences of CAUTI in the experimental and control groups on days 3, 7, and 10 were (5/225, 2.22% vs. 7/221, 3.17%, P = 0.54), (12/225, 5.33% vs. 18/221, 8.14%, P = 0.24), and (23/225, 10.22% vs. 47/221, 21.27%, P = 0.001), respectively; Escherichia coli and Candida albicans were the most common species in the two groups. The incidences of bacterial CAUTI and fungal CAUTI in the two groups were 11/225, 4.89% vs. 24/221, 10.86%, P = 0.02) and (10/225, 4.44% vs. 14/221, 6.33%, P = 0.38), respectively. The incidences of polymicrobial CAUTI in the two groups were 2/225 (0.89%) and 9/221 (4.07%), respectively (P = 0.03). The percentages of CAUTI-positive females in the two groups were 9.85% (13/132) and 29.52% (31/105), respectively (P < 0.05). The proportion of CAUTI-positive patients with diabetes in the experimental and control groups was 17.72% (14/79), which was lower than the 40.85% (29/71) in the control group (P < 0.05). CONCLUSION Expanded periurethral cleansing could reduce the incidence of CAUTI, especially those caused by bacteria and multiple pathogens, in comatose patients with short-term catheterization (≤ 10 days). Female patients and patients with diabetes benefit more from the expanded periurethral cleansing protocol for reducing CAUTI.
Collapse
Affiliation(s)
- Xingsong Qin
- Intensive Care Unit, The Fifth Clinical Medical College of Henan University of Chinese Medicine, No. 33, Huanghe Road, Zhengzhou, 450053, Henan, China
| | - He Zhao
- Intensive Care Unit, The Fifth Clinical Medical College of Henan University of Chinese Medicine, No. 33, Huanghe Road, Zhengzhou, 450053, Henan, China
| | - Wei Qin
- Intensive Care Unit, The Fifth Clinical Medical College of Henan University of Chinese Medicine, No. 33, Huanghe Road, Zhengzhou, 450053, Henan, China
| | - Xinglei Qin
- Department of General Surgery, Henan Provincial People's Hospital/People's Hospital of Zhengzhou University, Zhengzhou, 450003, China
| | - Songying Shen
- Intensive Care Unit, The Fifth Clinical Medical College of Henan University of Chinese Medicine, No. 33, Huanghe Road, Zhengzhou, 450053, Henan, China
| | - Hongyu Wang
- Intensive Care Unit, The Fifth Clinical Medical College of Henan University of Chinese Medicine, No. 33, Huanghe Road, Zhengzhou, 450053, Henan, China.
- Department of Emergency Medicine, The Fifth Clinical Medical College of Henan University of Chinese Medicine, Zhengzhou, 450053, China.
| |
Collapse
|
2
|
Chadha J, Thakur N, Chhibber S, Harjai K. A comprehensive status update on modification of foley catheter to combat catheter-associated urinary tract infections and microbial biofilms. Crit Rev Microbiol 2024; 50:168-195. [PMID: 36651058 DOI: 10.1080/1040841x.2023.2167593] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/01/2022] [Accepted: 01/09/2023] [Indexed: 01/19/2023]
Abstract
Present-day healthcare employs several types of invasive devices, including urinary catheters, to improve medical wellness, the clinical outcome of disease, and the quality of patient life. Among urinary catheters, the Foley catheter is most commonly used in patients for bladder drainage and collection of urine. Although such devices are very useful for patients who cannot empty their bladder for various reasons, they also expose patients to catheter-associated urinary tract infections (CAUTIs). Catheter provides an ideal surface for bacterial colonization and biofilm formation, resulting in persistent bacterial infection and severe complications. Hence, rigorous efforts have been made to develop catheters that harbour antimicrobial and anti-fouling properties to resist colonization by bacterial pathogens. In this regard, catheter modification by surface functionalization, impregnation, blending, or coating with antibiotics, bioactive compounds, and nanoformulations have proved to be effective in controlling biofilm formation. This review attempts to illustrate the complications associated with indwelling Foley catheters, primarily focussing on challenges in fighting CAUTI, catheter colonization, and biofilm formation. In this review, we also collate scientific literature on catheter modification using antibiotics, plant bioactive components, bacteriophages, nanoparticles, and studies demonstrating their efficacy through in vitro and in vivo testing.
Collapse
Affiliation(s)
- Jatin Chadha
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Navdisha Thakur
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh, India
| |
Collapse
|
3
|
Rajaramon S, Shanmugam K, Dandela R, Solomon AP. Emerging evidence-based innovative approaches to control catheter-associated urinary tract infection: a review. Front Cell Infect Microbiol 2023; 13:1134433. [PMID: 37560318 PMCID: PMC10407108 DOI: 10.3389/fcimb.2023.1134433] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 07/04/2023] [Indexed: 08/11/2023] Open
Abstract
Healthcare settings have dramatically advanced the latest medical devices, such as urinary catheters (UC) for infection, prevention, and control (IPC). The continuous or intermittent flow of a warm and conducive (urine) medium in the medical device, the urinary catheter, promotes the formation of biofilms and encrustations, thereby leading to the incidence of CAUTI. Additionally, the absence of an innate immune host response in and around the lumen of the catheter reduces microbial phagocytosis and drug action. Hence, the review comprehensively overviews the challenges posed by CAUTI and associated risks in patients' morbidity and mortality. Also, detailed, up-to-date information on the various strategies that blended/tailored the surface properties of UC to have anti-fouling, biocidal, and anti-adhesive properties to provide an outlook on how they can be better managed with futuristic solutions.
Collapse
Affiliation(s)
- Shobana Rajaramon
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Karthi Shanmugam
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| | - Rambabu Dandela
- Department of Industrial and Engineering Chemistry, Institute of Chemical Technology, Bhubaneswar, Odisha, India
| | - Adline Princy Solomon
- Quorum Sensing Laboratory, Centre for Research in Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed to be University, Thanjavur, India
| |
Collapse
|
4
|
Muacevic A, Adler JR. Catheter-Associated Urinary Tract Infection (CAUTI). Cureus 2022; 14:e30385. [PMID: 36407206 PMCID: PMC9668204 DOI: 10.7759/cureus.30385] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 10/17/2022] [Indexed: 01/25/2023] Open
Abstract
One of the most prevalent health-related illnesses globally is catheter-associated urinary tract infection (CAUTI). CAUTIs account for almost half of all hospital-acquired diseases. Most of the healthcare-acquired urinary tract infections result from catheter tubes implantation. These tubes connect a collecting system and the urinary bladder via the urethra. These are known as indwelling urinary catheters. The length of catheterization has a key role in starting bacteriuria since biofilm eventually forms on all of these devices. Despite the low percentage of people with bacteriuria who start showing symptoms, there is nevertheless a significant burden associated with these contamination due to the repeated use of indwelling urinary devices. Minimizing indwelling device usage and stopping the catheter as soon as medically possible are the two most crucial preventative measures for bacteriuria and infection when device use is required. Efforts to avoid catheter-acquired urinary infections must be implemented and monitored by infection control guidelines in healthcare institutions. These approaches include monitoring device use, the suitability of device justifications, and problems. Ultimately, technological advancements in device substances that inhibit colony generation will be necessary to avoid these infestations. There is still some way by which we can bring down the increased phenomenon of catheter-associated urinary tract contamination by maintaining hygiene while handling the catheter and patients and keeping the infected patients away or isolated from unaffected patients as a precaution. This article mainly focuses on an overview that helps with discussing prevention, risk factors, diagnosis, control and management of CAUTI.
Collapse
|
5
|
Chakrabarty S, Mishra MP, Bhattacharyay D. Targeting Microbial Bio-film: an Update on MDR Gram-Negative Bio-film Producers Causing Catheter-Associated Urinary Tract Infections. Appl Biochem Biotechnol 2022; 194:2796-2830. [PMID: 35247153 DOI: 10.1007/s12010-021-03711-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 10/08/2021] [Indexed: 11/26/2022]
Abstract
In every age group, urinary tract infection (UTI) is found as a major recurrence infectious disorder. Bio-films produced by bacteria perform a vital role in causing infection in the tract of the urinary system, leading to recurrences and relapses. The purpose of this review is to present the role and mechanism of bio-film producing MDR Gram-negative bacteria causing UTI, their significance, additionally the challenges for remedy and prevention of catheter-associated UTI. This work appreciates a new understanding of bio-film producers which are having multi-drug resistance capability and focuses on the effect and control of bio-film producing uropathogenic bacteria related to catheterization. We have tried to analyze approaches to target bio-film and reported phytochemicals with anti-bio-film activity also updated on anti-bio-film therapy.
Collapse
Affiliation(s)
- Susmita Chakrabarty
- School of Paramedics and Allied Health Sciences, Centurion University of Technology and Management, Sitapur, Odisha, India
| | - Monali P Mishra
- School of Paramedics and Allied Health Sciences, Centurion University of Technology and Management, Sitapur, Odisha, India.
| | - Dipankar Bhattacharyay
- School of Applied Sciences, Centurion University of Technology and Management, Sitapur, Odisha, India
| |
Collapse
|
6
|
Chen H, Yin C, Zhang X, Zhu Y. Preparation and characterisation of bifunctional surface-modified silicone catheter in lumen. J Glob Antimicrob Resist 2020; 23:46-54. [PMID: 32795517 DOI: 10.1016/j.jgar.2020.07.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 07/08/2020] [Accepted: 07/20/2020] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES The purpose of this study was to evaluate the coating of antimicrobial peptides (AMPs) and polyvinylpyrrolidone (PVP) to the surface of a silicone catheter to reduce bacterial growth and to increase hydrophilicity, respectively. METHODS Surface characterisation was performed on bare silicone, AMP-coated, PVP-coated and AMP + PVP-coated silicone catheters using attenuated total reflectance-infrared (ATR-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and water contact angle. Antibacterial activity, antibacterial biofilm growth and XTT assay were performed on bare silicone, AMP-coated, PVP-coated and AMP + PVP-coated silicone catheters. Statistical analysis was performed by one-way ANOVA. RESULTS The water contact angle of the AMP + PVP-coated silicone catheter was 21.37 ± 2.17° compared with 107.23 ± 0.96°, 74.40 ± 1.76° and 20.77 ± 0.32° for bare silicone, AMP-coated and PVP-coated silicone catheters. Based on in vitro antimicrobial tests, the AMP + PVP-coated silicone catheter had 6.2, 2.2 and 2.5 greater antibacterial activity than that of the bare silicone catheter against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa, respectively. Moreover, bacterial biofilm growth on the surface of the AMP + PVP-coated silicone catheter was minimal as characterised by scanning electron microscopy. MTT assay showed that bare silicone, AMP-coated, AMP + PVP-coated and PVP-coated silicone catheters were non-cytotoxic to 3T3 and human colon cancer (Caco-2) cells. CONCLUSIONS This work demonstrates that AMP + PVP-coated silicone catheters have potential clinical application prospects with improved hydrophilicity, excellent biocompatibility, antibacterial activity and a certain antibacterial biofilm effect.
Collapse
Affiliation(s)
- Haiyan Chen
- College of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, China
| | - Caiyun Yin
- College of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, China
| | - Xin Zhang
- College of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 211816, China
| | - Yishen Zhu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China.
| |
Collapse
|
7
|
García-Bonillo C, Texidó R, Reyes-Carmenaty G, Gilabert-Porres J, Borrós S. Study of the Human Albumin Role in the Formation of a Bacterial Biofilm on Urinary Devices Using QCM-D. ACS APPLIED BIO MATERIALS 2020; 3:3354-3364. [PMID: 35025378 DOI: 10.1021/acsabm.0c00286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Catheter-associated urinary tract infections (CAUTIs) are the most common health care-associated infections due to rapid bacterial colonization+ and biofilm formation in urinary catheters. This behavior has been extensively documented in medical devices. However, there is a few literature works on CAUTI providing a model that allows the exhaustive study of biofilm formation in a urinary environment. The development of an effective model would be helpful to identify the factors that promote the biofilm formation and identify strategies to avoid it. In this work, we have developed a model to test biofilm formation on urinary medical device surfaces by simulating environmental and physical conditions using a quartz crystal microbalance with dissipation (QCM-D) module with an uropathogenic strain. Moreover, we used the developed model to study the role of human albumin present in artificial urine at high concentrations because of renal failure or heart-diseases in patients. Despite model limitations using artificial urine, these tests show that human albumin can be considered as a promoter of biofilm formation on hydrophobic surfaces, being a possible risk factor to developing a CAUTI.
Collapse
Affiliation(s)
| | - Robert Texidó
- Tractivus SL, Via Augusta, 394, 08017 Barcelona, Spain
| | | | | | | |
Collapse
|
8
|
Shafeeq S, Wang X, Lünsdorf H, Brauner A, Römling U. Draft Genome Sequence of the Urinary Catheter Isolate Enterobacter ludwigii CEB04 with High Biofilm Forming Capacity. Microorganisms 2020; 8:microorganisms8040522. [PMID: 32260576 PMCID: PMC7232144 DOI: 10.3390/microorganisms8040522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/02/2020] [Accepted: 04/02/2020] [Indexed: 01/14/2023] Open
Abstract
Enterobacter ludwigii is a fermentative Gram-negative environmental species and accidental human pathogen that belongs to the Enterobacter cloacae complex with the general characteristics of the genus Enterobacter. The clinical isolate E. ludwigii CEB04 was derived from a urinary tract catheter of an individual not suffering from catheter-associated urinary tract infection. The draft genome sequence of the high biofilm forming E. ludwigii CEB04 was determined by PacBio sequencing. The chromosome of E. ludwigii CEB04 is comprised of one contig of 4,892,375 bps containing 4596 predicted protein-coding genes and 120 noncoding RNAs. E. ludwigii CEB04 harbors several antimicrobial resistance markers and has an extended cyclic-di-GMP signaling network compared to Escherichia coli K-12.
Collapse
Affiliation(s)
- Sulman Shafeeq
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 65 Stockholm, Sweden; (S.S.); (X.W.); (A.B.)
| | - Xiaoda Wang
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 65 Stockholm, Sweden; (S.S.); (X.W.); (A.B.)
| | - Heinrich Lünsdorf
- Helmholtz Center for Infection Research, DE-38124 Braunschweig, Germany;
| | - Annelie Brauner
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 65 Stockholm, Sweden; (S.S.); (X.W.); (A.B.)
- Clinical Microbiology, Karolinska University Hospital, SE-171 76 Stockholm, Sweden
| | - Ute Römling
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 65 Stockholm, Sweden; (S.S.); (X.W.); (A.B.)
- Correspondence:
| |
Collapse
|
9
|
Urinary Catheter Coating Modifications: The Race against Catheter-Associated Infections. COATINGS 2019. [DOI: 10.3390/coatings10010023] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Urinary catheters are common medical devices, whose main function is to drain the bladder. Although they improve patients’ quality of life, catheter placement predisposes the patient to develop a catheter-associated urinary tract infection (CAUTI). The catheter is used by pathogens as a platform for colonization and biofilm formation, leading to bacteriuria and increasing the risk of developing secondary bloodstream infections. In an effort to prevent microbial colonization, several catheter modifications have been made ranging from introduction of antimicrobial compounds to antifouling coatings. In this review, we discuss the effectiveness of different coatings in preventing catheter colonization in vitro and in vivo, the challenges in fighting CAUTIs, and novel approaches targeting host–catheter–microbe interactions.
Collapse
|
10
|
Mohan T, Čas A, Bračič M, Plohl O, Vesel A, Rupnik M, Zemljič LF, Rebol J. Highly Protein Repellent and Antiadhesive Polysaccharide Biomaterial Coating for Urinary Catheter Applications. ACS Biomater Sci Eng 2019; 5:5825-5832. [DOI: 10.1021/acsbiomaterials.9b01288] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Tamilselvan Mohan
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, Maribor 2000, Slovenia
| | - Alja Čas
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, Maribor 2000, Slovenia
| | - Matej Bračič
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, Maribor 2000, Slovenia
| | - Olivija Plohl
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, Maribor 2000, Slovenia
| | - Alenka Vesel
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Teslova 30, Ljubljana SI-1000, Slovenia
| | - Maja Rupnik
- Faculty of Medicine, University of Maribor, Taborska ulica 8, Maribor 2000, Slovenia
- National Laboratory for Health, Environment and Food, Prvomajska ulica 1, Maribor 2000, Slovenia
| | - Lidija Fras Zemljič
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, Maribor 2000, Slovenia
| | - Janez Rebol
- Department of Otorhinolaryngology, Cervical and Maxillofacial Surgery, University Medical Centre Maribor, Ljubljanska ulica 5, Maribor 2000, Slovenia
| |
Collapse
|
11
|
Yong Y, Qiao M, Chiu A, Fuchs S, Liu Q, Pardo Y, Worobo R, Liu Z, Ma M. Conformal Hydrogel Coatings on Catheters To Reduce Biofouling. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1927-1934. [PMID: 30441901 DOI: 10.1021/acs.langmuir.8b03074] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reducing biofouling while increasing lubricity of inserted medical catheters is highly desirable to improve their comfort, safety, and long-term use. We report here a simple method to create thin (∼30 μm) conformal lubricating hydrogel coatings on catheters. The key to this method is a three-step process including shape-forming, gradient cross-linking, and swell-peeling (we label this method as SGS). First, we took advantage of the fast gelation of agar to form a hydrogel layer conformal to catheters; then, we performed a surface-bound UV cross-linking of acrylamide mixed in agar in open air, purposely allowing gradual oxygen inhibition of free radicals to generate a gradient of cross-linking density across the hydrogel layer; and finally, we caused the hydrogel to swell to let the non-cross-linked/loosely attached hydrogel fall off, leaving behind a surface-bound, thin, and mostly uniform hydrogel coating. This method also allowed easy incorporation of different polymerizable monomers to obtain multifunctionality. For example, incorporating an antifouling, zwitterionic moiety sulfobetaine in the hydrogel reduced both in vitro protein adsorption and in vivo foreign-body response in mice. The addition of a biocidal N-halamine monomer to the hydrogel coating deactivated both Staphylococcus aureus ( S. aureus) and Escherichia coli ( E. coli) O157:H7 within 30 min of contact and reduced biofilm formation by 90% compared to those of uncoated commercial catheters when challenged with S. aureus for 3 days. The lubricating, antibiofouling hydrogel coating may bring clinical benefits in the use of urinary and venous catheters as well as other types of medical devices.
Collapse
Affiliation(s)
- You Yong
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
- Key Lab of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Mingyu Qiao
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
| | - Alan Chiu
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
| | - Stephanie Fuchs
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
| | - Qingsheng Liu
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
| | - Yehudah Pardo
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
| | - Randy Worobo
- Department of Food Science , Cornell University , Ithaca , New York 14850 , United States
| | - Zheng Liu
- Key Lab of Industrial Biocatalysis, Ministry of Education, Department of Chemical Engineering , Tsinghua University , Beijing 100084 , China
| | - Minglin Ma
- Department of Biological and Environmental Engineering , Cornell University , Ithaca , New York 14850 , United States
| |
Collapse
|
12
|
Menegueti MG, Ciol MA, Bellissimo-Rodrigues F, Auxiliadora-Martins M, Gaspar GG, Canini SRMDS, Basile-Filho A, Laus AM. Long-term prevention of catheter-associated urinary tract infections among critically ill patients through the implementation of an educational program and a daily checklist for maintenance of indwelling urinary catheters: A quasi-experimental study. Medicine (Baltimore) 2019; 98:e14417. [PMID: 30813142 PMCID: PMC6407993 DOI: 10.1097/md.0000000000014417] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Removing an indwelling urinary catheter as soon as possible is the cornerstone of catheter-associated urinary tract infections (CAUTI) prevention. However, implementing this measure may be challenging in clinical settings. To evaluate the impact of implementing a healthcare workers (HCWs) educational program and a daily checklist for indwelling urinary catheter indications among critical patients on the incidence of CAUTI. METHODS This was a quasi-experimental study performed in a general intensive care unit of a tertiary-care hospital over a 12 years period, from January 1, 2005 to December 31, 2016. Rates of urinary catheter use and incidence density of CAUTI were monthly evaluated following the Centers for Disease Control and Prevention (CDC) criteria throughout the study period. Phase I (2005-2006) was the pre-intervention period. In phase II (2007-2010), HCWs routine training on CAUTI prevention was performed twice-a-year. In phase III (2011-2014), we implemented a daily checklist for indwelling urinary catheter indications, in addition to the biannual training. In phase IV, (2015-2016) the biannual training was replaced by training only newly hired HCWs and the daily checklist was maintained. RESULTS The mean rate of urinary catheter utilization decreased from phase I to phase IV (73.1%, 74.1%, 54.9%, and 45.6%, respectively). Similarly, the incidence density of CAUTI decreased from phase I to phase IV (14.9, 7.3, 3.8, and 1.1 per 1000 catheter-days, respectively). CONCLUSIONS HCWs education and daily evaluation of indwelling urinary catheter indications were highly effective in reducing the rates of catheter utilization as well as the incidence density of CAUTI.
Collapse
Affiliation(s)
| | - Marcia A. Ciol
- Department of Rehabilitation Medicine, School of Medicine, University of Washington, Seattle, Washington
| | | | - Maria Auxiliadora-Martins
- Division of Intensive Care Medicine, Department of Surgery and Anatomy, Ribeirão Preto Medical School
| | - Gilberto Gambero Gaspar
- Infection Control Service, University Hospital of Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Anibal Basile-Filho
- Division of Intensive Care Medicine, Department of Surgery and Anatomy, Ribeirão Preto Medical School
| | | |
Collapse
|
13
|
Flores-Mireles A, Hreha TN, Hunstad DA. Pathophysiology, Treatment, and Prevention of Catheter-Associated Urinary Tract Infection. Top Spinal Cord Inj Rehabil 2019; 25:228-240. [PMID: 31548790 PMCID: PMC6743745 DOI: 10.1310/sci2503-228] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Urinary tract infections (UTIs) are among the most common microbial infections in humans and represent a substantial burden on the health care system. UTIs can be uncomplicated, as when affecting healthy individuals, or complicated, when affecting individuals with compromised urodynamics and/or host defenses, such as those with a urinary catheter. There are clear differences between uncomplicated UTI and catheter-associated UTI (CAUTI) in clinical manifestations, causative organisms, and pathophysiology. Therefore, uncomplicated UTI and CAUTI cannot be approached similarly, or the risk of complications and treatment failure may increase. It is imperative to understand the key aspects of each condition to develop successful treatment options and improve patient outcomes. Here, we will review the epidemiology, pathogen prevalence, differential mechanisms used by uropathogens, and treatment and prevention of uncomplicated UTI and CAUTI.
Collapse
Affiliation(s)
| | - Teri N. Hreha
- Washington University School of Medicine, Saint Louis, Missouri
| | | |
Collapse
|
14
|
Bračič M, Fras-Zemljič L, Pérez L, Kogej K, Stana-Kleinschek K, Kargl R, Mohan T. Protein-repellent and antimicrobial nanoparticle coatings from hyaluronic acid and a lysine-derived biocompatible surfactant. J Mater Chem B 2017; 5:3888-3897. [PMID: 32264250 DOI: 10.1039/c7tb00311k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biofilm formation triggered by uncontrolled protein adsorption, on medical devices is the leading cause of catheter-associated urinary tract infections (CAUTI) during implantation. Herein, we report a water-based, green and one-step strategy to functionalize surfaces of silicone catheters, poly(dimethylsiloxane) (PDMS), with antifouling and antimicrobial substances to avoid uncontrolled protein adsorption and microbial attachment. A novel synergetic formulation consisting of an anionic glycosaminoglycan (hyaluronic acid, HA) and a lysine-derived biocompatible cationic surfactant (Nε-myristoyl-lysine methyl ester, MKM) was prepared, resulting in the formation of nanoparticles (NPs, ca. 100-250 nm). Besides their high stability and long-lasting hydrophilicity in ambient and aqueous environments for 60 days, the nanometric layers (48 ± 3 nm) of HA-MKM NPs on PDMS showed no adsorption of BSA and lysozyme and substantially lower adsorption of fibrinogen as revealed by a quartz crystal microbalance with dissipation (QCM-D). In vitro antimicrobial test with S. aureus, E. coli, P. aeruginosa, P. mirabilis, C. albicans microbes under dynamic conditions revealed that the microbial growth was hampered by 85% compared with unmodified PDMS. Given the multiple functionalities, charges and diverse physiochemical properties of polysaccharide-lysine-based surfactant mixtures, this approach can be easily extended to the development of novel coatings on other silicone-based materials, thereby broadening potential applicability of PDMS-based biomaterials/devices in microfluidics, diagnostic biosensors and others.
Collapse
Affiliation(s)
- M Bračič
- Laboratory for Characterization and Processing of Polymers, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | | | | | | | | | | | | |
Collapse
|
15
|
Azithromycin-Ciprofloxacin-Impregnated Urinary Catheters Avert Bacterial Colonization, Biofilm Formation, and Inflammation in a Murine Model of Foreign-Body-Associated Urinary Tract Infections Caused by Pseudomonas aeruginosa. Antimicrob Agents Chemother 2017; 61:AAC.01906-16. [PMID: 28031194 DOI: 10.1128/aac.01906-16] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 12/12/2016] [Indexed: 11/20/2022] Open
Abstract
Pseudomonas aeruginosa is a multifaceted pathogen causing a variety of biofilm-mediated infections, including catheter-associated urinary tract infections (CAUTIs). The high prevalence of CAUTIs in hospitals, their clinical manifestations, such as urethritis, cystitis, pyelonephritis, meningitis, urosepsis, and death, and the associated economic challenges underscore the need for management of these infections. Biomaterial modification of urinary catheters with two drugs seems an interesting approach to combat CAUTIs by inhibiting biofilm. Previously, we demonstrated the in vitro efficacy of urinary catheters impregnated with azithromycin (AZM) and ciprofloxacin (CIP) against P. aeruginosa Here, we report how these coated catheters impact the course of CAUTI induced by P. aeruginosa in a murine model. CAUTI was established in female LACA mice with uncoated or AZM-CIP-coated silicone implants in the bladder, followed by transurethral inoculation of 108 CFU/ml of biofilm cells of P. aeruginosa PAO1. AZM-CIP-coated implants (i) prevented biofilm formation on the implant's surface (P ≤ 0.01), (ii) restricted bacterial colonization in the bladder and kidney (P < 0.0001), (iii) averted bacteriuria (P < 0.0001), and (iv) exhibited no major histopathological changes for 28 days in comparison to uncoated implants, which showed persistent CAUTI. Antibiotic implants also overcame implant-mediated inflammation, as characterized by trivial levels of inflammatory markers such as malondialdehyde (P < 0.001), myeloperoxidase (P < 0.05), reactive oxygen species (P ≤ 0.001), and reactive nitrogen intermediates (P < 0.01) in comparison to those in uncoated implants. Further, AZM-CIP-coated implants showed immunomodulation by manipulating the release of inflammatory cytokines interleukin-6 (IL-6), tumor necrosis factor alpha (TNF-α), and IL-10 to the benefit of the host. Overall, the study demonstrates long-term in vivo effectiveness of AZM-CIP-impregnated catheters, which may possibly be a key to success in preventing CAUTIs.
Collapse
|
16
|
Ivanova K, Fernandes MM, Francesko A, Mendoza E, Guezguez J, Burnet M, Tzanov T. Quorum-Quenching and Matrix-Degrading Enzymes in Multilayer Coatings Synergistically Prevent Bacterial Biofilm Formation on Urinary Catheters. ACS APPLIED MATERIALS & INTERFACES 2015; 7:27066-27077. [PMID: 26593217 DOI: 10.1021/acsami.5b09489] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Bacteria often colonize in-dwelling medical devices and grow as complex biofilm communities of cells embedded in a self-produced extracellular polymeric matrix, which increases their resistance to antibiotics and the host immune system. During biofilm growth, bacterial cells cooperate through specific quorum-sensing (QS) signals. Taking advantage of this mechanism of biofilm formation, we hypothesized that interrupting the communication among bacteria and simultaneously degrading the extracellular matrix would inhibit biofilm growth. To this end, coatings composed of the enzymes acylase and α-amylase, able to degrade bacterial QS molecules and polysaccharides, respectively, were built on silicone urinary catheters using a layer-by-layer deposition technique. Multilayer coatings of either acylase or amylase alone suppressed the biofilm formation of corresponding Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus. Further assembly of both enzymes in hybrid nanocoatings resulted in stronger biofilm inhibition as a function of acylase or amylase position in the layers. Hybrid coatings, with the QS-signal-degrading acylase as outermost layer, demonstrated 30% higher antibiofilm efficiency against medically relevant Gram-negative bacteria compared to that of the other assemblies. These nanocoatings significantly reduced the occurrence of single-species (P. aeruginosa) and mixed-species (P. aeruginosa and Escherichia coli) biofilms on silicone catheters under both static and dynamic conditions. Moreover, in an in vivo animal model, the quorum quenching and matrix degrading enzyme assemblies delayed the biofilm growth up to 7 days.
Collapse
Affiliation(s)
- Kristina Ivanova
- Group of Molecular and Industrial Biotechnology, Department of Chemical Engineering, Universitat Politècnica de Catalunya , Rambla Sant Nebridi 22, 08222 Terrassa, Spain
| | - Margarida M Fernandes
- Group of Molecular and Industrial Biotechnology, Department of Chemical Engineering, Universitat Politècnica de Catalunya , Rambla Sant Nebridi 22, 08222 Terrassa, Spain
| | - Antonio Francesko
- Group of Molecular and Industrial Biotechnology, Department of Chemical Engineering, Universitat Politècnica de Catalunya , Rambla Sant Nebridi 22, 08222 Terrassa, Spain
| | - Ernest Mendoza
- Laboratory of Applied Nanomaterials, Center for Research in NanoEngineering, Universitat Politècnica de Catalunya , c/Pascual I Vila 15, 08028 Barcelona, Spain
| | - Jamil Guezguez
- Synovo GmbH , Paul Ehrlich 15, D-72076 Tübingen, Germany
| | - Michael Burnet
- Synovo GmbH , Paul Ehrlich 15, D-72076 Tübingen, Germany
| | - Tzanko Tzanov
- Group of Molecular and Industrial Biotechnology, Department of Chemical Engineering, Universitat Politècnica de Catalunya , Rambla Sant Nebridi 22, 08222 Terrassa, Spain
| |
Collapse
|
17
|
Salvarci A, Koroglu M, Erayman B. Investigation of Antibacterial Activity and Biofilm Formation of Silicones Coated With Minocycline-Rifampicin, Silver Nitrate, and Nitrofurantoin for Short-term Utilization in In Vitro Urinary System Models. Urology 2015; 88:66-75. [PMID: 26522971 DOI: 10.1016/j.urology.2015.10.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 09/29/2015] [Accepted: 10/20/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To analyze antimicrobial activity and biofilm formation on silicones coated with antimicrobial substances in in vivo short-term catheterization simulation using our newly developed in vitro urinary system model and to compare minocycline-rifampin (MR)-, silver nitrate-, and nitrofurantoin (NF)-coated silicone discs. MATERIALS AND METHODS Silicone discs were exposed to bacterial urine suspension for 168 hours. The antimicrobial activities were assessed in the medium, and the inhibition zone diameters were measured. The weight of the silicones was measured for biofilm growth assessment before and after the experiment, and confocal microscopy images were taken. RESULTS Although the inhibition zone diameters of silver nitrate silicones were larger than those of pure silicone (PS), MR, and NF silicones, biofilm formation could not be prevented (P < .05). MR and NF silicones were superior to PS in terms of antimicrobial efficacy and prevention of biofilm formation (P < .05). In terms of biofilm prevention, no differences were detected between NF and MR silicones apart from a slightly superior ability of MR silicones to inhibit Escherichia coli (P > .05). Biofilm formation occurred on all silicone discs. CONCLUSION In short-term urinary catheter utilization, antimicrobial efficacy and biofilm formation prevention were superior in coated silicones, regardless of the type of antibiotic used, compared with the control group (PS). As the study was conducted in an in vitro setting, the findings should be substantiated with in vivo studies on the grounds that different results may be obtained in these settings.
Collapse
Affiliation(s)
- Ahmet Salvarci
- Department of Urology, Konya Hospital, Karatay, Konya, Turkey.
| | - Mehmet Koroglu
- Department of Medical Microbiology, Sakarya University School of Medicine, Sakarya, Turkey
| | - Berna Erayman
- Department of Medical Microbiology, Konya System Laboratory, Selcuklu, Konya, Turkey
| |
Collapse
|
18
|
Thallinger B, Brandauer M, Burger P, Sygmund C, Ludwig R, Ivanova K, Kun J, Scaini D, Burnet M, Tzanov T, Nyanhongo GS, Guebitz GM. Cellobiose dehydrogenase functionalized urinary catheter as novel antibiofilm system. J Biomed Mater Res B Appl Biomater 2015; 104:1448-56. [PMID: 26251187 DOI: 10.1002/jbm.b.33491] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 07/07/2015] [Accepted: 07/18/2015] [Indexed: 11/11/2022]
Abstract
Urinary catheters expose patients to a high risk of acquiring nosocomial infections. To prevent this risk of infection, cellobiose dehydrogenase (CDH), an antimicrobial enzyme able to use various oligosaccharides as electron donors to produce hydrogen peroxide using oxygen as an electron acceptor, was covalently grafted onto plasma-activated urinary polydimethylsiloxane (PDMS) catheter surfaces. Successful immobilization of CDH on PDMS was confirmed by Fourier transformed-infrared spectrometry and production of H2 O2 . The CDH functionalized PDMS surfaces reduced the amount of viable Staphylococcus aureus by 60%, total biomass deposited on the surface by 30% and 70% of biofilm formation. The immobilized CDH was relatively stable in artificial urine over 16 days, retaining 20% of its initial activity. The CDH coated PDMS surface did not affect the growth and physiology of HEK 239 and RAW 264,7 mammalian cells. Therefore this new CDH functionalized catheter system shows great potential for solving the current problems associated with urinary catheters. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1448-1456, 2016.
Collapse
Affiliation(s)
- Barbara Thallinger
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences, 3430, Tulln, Austria.
| | - Martin Brandauer
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences, 3430, Tulln, Austria
| | - Peter Burger
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences, 3430, Tulln, Austria
| | - Christoph Sygmund
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, University of Natural Resources and Life Sciences, 1190, Vienna, Austria
| | - Roland Ludwig
- Department of Food Sciences and Technology, Food Biotechnology Laboratory, University of Natural Resources and Life Sciences, 1190, Vienna, Austria
| | - Kristina Ivanova
- Department d'Enginyeria Química, Universitat Politècnica de Catalunya, Grup de Biotecnologia Molecular i Industrial, 08222, Terrassa, Spain
| | - Jutta Kun
- Synovo GesmbH, 72076, Tübingen, Germany
| | - Denis Scaini
- Elettra Sincrotrone, 34149, Basovizza, TS, Italy
| | | | - Tzanko Tzanov
- Department d'Enginyeria Química, Universitat Politècnica de Catalunya, Grup de Biotecnologia Molecular i Industrial, 08222, Terrassa, Spain
| | - Gibson S Nyanhongo
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences, 3430, Tulln, Austria. .,Botswana International University of Science and Technology, Private Mail Bag 16, Palapye Botswana.
| | - Georg M Guebitz
- Institute of Environmental Biotechnology, University of Natural Resources and Life Sciences, 3430, Tulln, Austria
| |
Collapse
|
19
|
Lim K, Chua RRY, Bow H, Tambyah PA, Hadinoto K, Leong SSJ. Development of a catheter functionalized by a polydopamine peptide coating with antimicrobial and antibiofilm properties. Acta Biomater 2015; 15:127-38. [PMID: 25541344 DOI: 10.1016/j.actbio.2014.12.015] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 12/08/2014] [Accepted: 12/16/2014] [Indexed: 12/18/2022]
Abstract
Catheter-associated urinary tract infections (CAUTIs) are the most common hospital-acquired infections worldwide, aggravating the problem of antimicrobial resistance and patient morbidity. There is a need for a potent and robust antimicrobial coating for catheters to prevent these infections. An ideal coating agent should possess high antimicrobial efficacy and be easily and economically conjugated to the catheter surface. In this study, we report a simple yet effective immobilization strategy to tether a potent synthetic antimicrobial peptide, CWR11, onto catheter-relevant surfaces. Polydopamine (PD) was deposited as a thin adherent film onto a polydimethylsiloxane (PDMS) surface to facilitate attachment of CWR11 onto the PD-functionalized polymer. Surface characterization of the CWR11-tethered surfaces confirmed the successful immobilization of peptides onto the PD-coated PDMS. The CWR11-immobilized PDMS slides displayed excellent antimicrobial (significant inhibition of 5×10(4) colony-forming units of CAUTI-relevant microbes) and antibiofilm (∼92% enhanced antibacterial adherence) properties. To assess its clinical relevance, the PD-based immobilization platform was translated onto commercial silicone-coated Foley catheters. The CWR11-impregnated catheter displayed potent bactericidal properties against both Gram-positive and Gram-negative bacteria, and retained its antimicrobial functionality for at least 21days, showing negligible cytotoxicity against human erythrocyte and uroepithelial cells. The outcome of this study demonstrates the proof-of-concept potential of a polydopamine-CWR11-functionalized catheter to combat CAUTIs.
Collapse
Affiliation(s)
- Kaiyang Lim
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore, Singapore
| | - Ray Rong Yuan Chua
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, 119228 Singapore, Singapore
| | - Ho Bow
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, 117545 Singapore, Singapore
| | - Paul Anantharajah Tambyah
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, 119228 Singapore, Singapore
| | - Kunn Hadinoto
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore, Singapore.
| | - Susanna Su Jan Leong
- Singapore Institute of Technology, 10 Dover Drive, 138683 Singapore, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, 117597 Singapore, Singapore; Synthetic Biology Research Consortium, National University of Singapore, 28 Medical Drive, 117456 Singapore, Singapore.
| |
Collapse
|
20
|
Khantamat O, Li CH, Yu F, Jamison AC, Shih WC, Cai C, Lee TR. Gold nanoshell-decorated silicone surfaces for the near-infrared (NIR) photothermal destruction of the pathogenic bacterium E. faecalis. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3981-93. [PMID: 25611157 DOI: 10.1021/am506516r] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Catheter-related infections (CRIs) are associated with the formation of pathogenic biofilms on the surfaces of silicone catheters, which are ubiquitous in medicine. These biofilms provide protection against antimicrobial agents and facilitate the development of bacterial resistance to antibiotics. The application of photothermal agents on catheter surfaces is an innovative approach to overcoming biofilm-generated CRIs. Gold nanoshells (AuNSs) represent a promising photothermal tool, because they can be used to generate heat upon exposure to near-infrared (NIR) radiation, are biologically inert at physiological temperatures, and can be engineered for the photothermal ablation of cells and tissue. In this study, AuNSs functionalized with carboxylate-terminated organosulfur ligands were attached to model catheter surfaces and tested for their effectiveness at killing adhered Enterococcus faecalis (E. faecalis) bacteria. The morphology of the AuNSs was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), while the elemental composition was characterized by energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). Furthermore, optical and photothermal properties were acquired by ultraviolet-visible (UV-vis) spectroscopy and thermographic imaging with an infrared camera, respectively. Bacterial survival studies on AuNS-modified surfaces irradiated with and without NIR light were evaluated using a colony-formation assay. These studies demonstrated that AuNS-modified surfaces, when illuminated with NIR light, can effectively kill E. faecalis on silicone surfaces.
Collapse
Affiliation(s)
- Orawan Khantamat
- Department of Chemistry and the Texas Center for Superconductivity and ‡Department of Electrical and Computer Engineering University of Houston , Houston, Texas 77204-5003, United States
| | | | | | | | | | | | | |
Collapse
|
21
|
Loveday HP, Wilson JA, Pratt RJ, Golsorkhi M, Tingle A, Bak A, Browne J, Prieto J, Wilcox M, UK Department of Health. epic3: national evidence-based guidelines for preventing healthcare-associated infections in NHS hospitals in England. J Hosp Infect 2014; 86 Suppl 1:S1-70. [PMID: 24330862 PMCID: PMC7114876 DOI: 10.1016/s0195-6701(13)60012-2] [Citation(s) in RCA: 660] [Impact Index Per Article: 66.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
National evidence-based guidelines for preventing healthcare-associated infections (HCAI) in National Health Service (NHS) hospitals in England were originally commissioned by the Department of Health and developed during 1998-2000 by a nurse-led multi-professional team of researchers and specialist clinicians. Following extensive consultation, they were first published in January 2001(1) and updated in 2007.(2) A cardinal feature of evidence-based guidelines is that they are subject to timely review in order that new research evidence and technological advances can be identified, appraised and, if shown to be effective for the prevention of HCAI, incorporated into amended guidelines. Periodically updating the evidence base and guideline recommendations is essential in order to maintain their validity and authority. The Department of Health commissioned a review of new evidence and we have updated the evidence base for making infection prevention and control recommendations. A critical assessment of the updated evidence indicated that the epic2 guidelines published in 2007 remain robust, relevant and appropriate, but some guideline recommendations required adjustments to enhance clarity and a number of new recommendations were required. These have been clearly identified in the text. In addition, the synopses of evidence underpinning the guideline recommendations have been updated. These guidelines (epic3) provide comprehensive recommendations for preventing HCAI in hospital and other acute care settings based on the best currently available evidence. National evidence-based guidelines are broad principles of best practice that need to be integrated into local practice guidelines and audited to reduce variation in practice and maintain patient safety. Clinically effective infection prevention and control practice is an essential feature of patient protection. By incorporating these guidelines into routine daily clinical practice, patient safety can be enhanced and the risk of patients acquiring an infection during episodes of health care in NHS hospitals in England can be minimised.
Collapse
Affiliation(s)
- H P Loveday
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London).
| | - J A Wilson
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London)
| | - R J Pratt
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London)
| | - M Golsorkhi
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London)
| | - A Tingle
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London)
| | - A Bak
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London)
| | - J Browne
- Richard Wells Research Centre, College of Nursing, Midwifery and Healthcare, University of West London (London)
| | - J Prieto
- Faculty of Health Sciences, University of Southampton (Southampton)
| | - M Wilcox
- Microbiology and Infection Control, Leeds Teaching Hospitals and University of Leeds (Leeds)
| | | |
Collapse
|
22
|
Griebling TL. Detrusor Underactivity and Urinary Retention in Geriatric Patients: Evaluation, Management and Recent Research. CURRENT BLADDER DYSFUNCTION REPORTS 2013. [DOI: 10.1007/s11884-013-0183-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
23
|
Rafienia M, Zarinmehr B, Poursamar SA, Bonakdar S, Ghavami M, Janmaleki M. Coated urinary catheter by PEG/PVA/gentamicin with drug delivery capability against hospital infection. IRANIAN POLYMER JOURNAL 2012. [DOI: 10.1007/s13726-012-0105-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
24
|
Analysis of the distribution of bacteria within urinary catheter biofilms using four different molecular techniques. Am J Infect Control 2012; 40:e249-54. [PMID: 23006677 DOI: 10.1016/j.ajic.2012.05.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 05/05/2012] [Accepted: 05/07/2012] [Indexed: 12/28/2022]
Abstract
BACKGROUND Most nosocomial urinary tract infections are associated with the long-term use of urinary catheters. Such urinary catheter-associated infections are caused by bacteria that reside in biofilms. We determined the distribution of fastidious/nonculturable bacteria in biofilm of urinary catheters and evaluated the availability of concurrent applying various molecular techniques. METHODS The biofilms were isolated from urinary catheters that had been installed in patients for 3 or 4 weeks and examined by the following 4 different 16S ribosomal RNA (rRNA) analysis techniques: capillary electrophoresis, terminal restriction fragment length polymorphism (T-RFLP), denaturing gradient gel electrophoresis (DGGE), and pyrosequencing. RESULTS A total of 329 isolates was identified by capillary electrophoresis. The most common genera were Edwardsiella, Enterobacter, Escherichia, and Pseudomonas. A total of 32 bacterial strains was identified by T-RFLP. Escherichia, Pseudomonas, Enterobacter, Moraxella, Proteus, Serratia, and Yersinia were the most represented genera. Similarly, Escherichia, Pseudomonas, and Enterobacter were the most prevalent according to DGGE. Burkholderia, Corynebacterium, Achromobacter, Alcaligenes, Citrobacter, Stenotrophomonas, and Streptococcus were also detected. Escherichia and Pseudomonas were abundantly detected by pyrosequencing. Enterobacter, Bacteroides, Klebsiella, Corynebacterium were also seen. CONCLUSION These 4 techniques detected different kinds of bacteria, suggesting that the simultaneous application of multiple techniques is necessary to accurately detect fastidious/nonculturable bacteria. Because bacterial growth within urinary catheter biofilms may be associated with urinary tract infections, further comprehensive studies are required.
Collapse
|
25
|
FdeC, a novel broadly conserved Escherichia coli adhesin eliciting protection against urinary tract infections. mBio 2012; 3:mBio.00010-12. [PMID: 22496310 PMCID: PMC3324786 DOI: 10.1128/mbio.00010-12] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The increasing antibiotic resistance of pathogenic Escherichia coli species and the absence of a pan-protective vaccine pose major health concerns. We recently identified, by subtractive reverse vaccinology, nine Escherichia coli antigens that protect mice from sepsis. In this study, we characterized one of them, ECOK1_0290, named FdeC (factor adherence E. coli) for its ability to mediate E. coli adhesion to mammalian cells and extracellular matrix. This adhesive propensity was consistent with the X-ray structure of one of the FdeC domains that shows a striking structural homology to Yersinia pseudotuberculosis invasin and enteropathogenic E. coli intimin. Confocal imaging analysis revealed that expression of FdeC on the bacterial surface is triggered by interaction of E. coli with host cells. This phenotype was also observed in bladder tissue sections derived from mice infected with an extraintestinal strain. Indeed, we observed that FdeC contributes to colonization of the bladder and kidney, with the wild-type strain outcompeting the fdeC mutant in cochallenge experiments. Finally, intranasal mucosal immunization with recombinant FdeC significantly reduced kidney colonization in mice challenged transurethrally with uropathogenic E. coli, supporting a role for FdeC in urinary tract infections. Pathogenic Escherichia coli strains are involved in a diverse spectrum of diseases, including intestinal and extraintestinal infections (urinary tract infections and sepsis). The absence of a broadly protective vaccine against all these E. coli strains is a major problem for modern society due to high costs to health care systems. Here, we describe the structural and functional properties of a recently reported protective antigen, named FdeC, and elucidated its putative role during extraintestinal pathogenic E. coli infection by using both in vitro and in vivo infection models. The conservation of FdeC among strains of different E. coli pathotypes highlights its potential as a component of a broadly protective vaccine against extraintestinal and intestinal E. coli infections.
Collapse
|
26
|
Trautner BW, Lopez AI, Kumar A, Siddiq DM, Liao KS, Li Y, Tweardy DJ, Cai C. Nanoscale surface modification favors benign biofilm formation and impedes adherence by pathogens. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2012; 8:261-70. [PMID: 22197726 PMCID: PMC3311755 DOI: 10.1016/j.nano.2011.11.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 09/07/2011] [Accepted: 11/29/2011] [Indexed: 11/24/2022]
Abstract
We have found in vitro that a biofilm of benign Escherichia coli 83972 interferes with urinary catheter colonization by pathogens, and in human studies E. coli 83972-coated urinary catheters are associated with lower rates of catheter-associated urinary tract infections. We hypothesized that modifying surfaces to present mannose ligands for the type 1 fimbriae of E. coli would promote formation of dense E. coli 83972 biofilms, thereby interfering with surface colonization by Enterococcus faecalis, a common uropathogen. We covalently immobilized mannose on silicon substrates by attaching amino-terminated mannose derivative to carboxylic acid-terminated monolayers via amidation. Fluorescence microscopy showed that E. coli 83972 adherence to mannose-modified surfaces increased 4.4-fold compared to unmodified silicon surfaces. Pre-exposing mannose-modified surfaces to E. coli 83972 established a protective biofilm that reduced E. faecalis adherence by 83-fold. Mannose-fimbrial interactions were essential for the improved E. coli 83927 adherence and interference effects. From the Clinical Editor: Recurrent urinary tract infections remain major adverse events associated with catheter use. The authors report that modifying catheter surface to present mannose ligands for the type 1 fimbriae of benign Escherichia coli 83972 promotes formation of dense E. coli biofilms, which 100-fold reduces urinary catheter colonization of uropathogens. Future application of this technology is expected to result in substantial UTI risk reduction in catheter users.
Collapse
Affiliation(s)
- Barbara W. Trautner
- Houston Center for Quality of Care & Utilization Studies; Michael E. DeBakey Veterans Affairs Medical Center
- Section of Infectious Diseases, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | | | - Amit Kumar
- Department of Chemistry, University of Houston, Houston, TX 77204
| | - Danish M. Siddiq
- Section of Infectious Diseases, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Kershena S. Liao
- Section of Infectious Diseases, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Yan Li
- Department of Chemistry, University of Houston, Houston, TX 77204
| | - David J. Tweardy
- Section of Infectious Diseases, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030
| | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX 77204
| |
Collapse
|
27
|
Lopez AI, Kumar A, Planas MR, Li Y, Nguyen TV, Cai C. Biofunctionalization of silicone polymers using poly(amidoamine) dendrimers and a mannose derivative for prolonged interference against pathogen colonization. Biomaterials 2011; 32:4336-46. [PMID: 21435713 PMCID: PMC3085595 DOI: 10.1016/j.biomaterials.2011.02.056] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Accepted: 02/27/2011] [Indexed: 01/01/2023]
Abstract
Despite numerous preventive strategies on bacterial adhesion, pathogenic biofilm formation remained the major cause of medical device-related infections. Bacterial interference is a promising strategy that uses pre-established biofilms of benign bacteria to serve as live, protective coating against pathogen colonization. However, the application of this strategy to silicone urinary catheters was hampered by low adherence of benign bacteria onto silicone materials. In this work, we present a general method for biofunctionalization of silicone (PDMS) as one of the most widely used materials for biomedical devices. We used mild CO(2) plasma to activate PDMS surface followed by simple attachment of generation 5 (G5) poly(amidoamine) (PAMAM) dendrimers to generate an amino-terminated surface that were maintained even after storage in PBS buffer for 36 days. We then covalently attach a carboxy-terminated mannose derivative to the modified PDMS to promote the adherence of benign Escherichia coli 83972 expressing mannose-binding type 1 fimbriae. We demonstrated that dense, stable biofilms of E. coli 83972 could be established within 48 h on the mannose-coated PDMS. Significantly, this benign biofilm reduced the adherence of the uropathogenic Enterococcus faecalis by 104-fold after 72 h, while the benign bacteria on the unmodified substrate by only 5.5-fold.
Collapse
Affiliation(s)
- Analette I. Lopez
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | - Amit Kumar
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | - Megan R. Planas
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | - Yan Li
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | - Thuy V. Nguyen
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| | - Chengzhi Cai
- Department of Chemistry, University of Houston, Houston, TX 77204, USA
| |
Collapse
|
28
|
Theofanidis D, Fountouki A. Bladder catheterization in Greek nursing education: An audit of the skills taught. NURSE EDUCATION TODAY 2011; 31:157-162. [PMID: 20580468 DOI: 10.1016/j.nedt.2010.05.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Revised: 05/20/2010] [Accepted: 05/21/2010] [Indexed: 05/29/2023]
Abstract
INTRODUCTION The auditing of nurse teaching is in its infancy in Greece. One area urgently in need of audit is the teaching of male catheterization. AIMS To assess the current educational model regarding male bladder catheterization at a sole tertiary education nursing establishment in a major Greek city and to improve nurse undergraduate training by implementing appropriate recommendations for change to the current educational module and support these changes in the long term. METHODS A systematic search of international databases for guidelines or best practice regarding bladder catheterization was conducted. Audit measures included direct observation of the teaching process and compilation of a checklist. RESULTS The shortcomings are discussed under the following headings: patient pre-preparation, choice and quality of materials used, appropriate aseptic techniques, catheter withdrawal, connecting and handling the drainage bag, diminishing risk of Catheter Associated Urinary Track Infections (CAUTIs), no problem solving trouble-shooting training, textbook and educational resources, lack of national guidelines, setting of the educational experience. CONCLUSIONS The main problem with the teaching process exposed by the audit is entrenched use of an outmoded textbook with little effort to enrich teaching with current evidence base practices.
Collapse
|
29
|
Novel biocatalytic polymer-based antimicrobial coatings as potential ureteral biomaterial: preparation and in vitro performance evaluation. Antimicrob Agents Chemother 2010; 55:845-53. [PMID: 21135190 DOI: 10.1128/aac.00477-10] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Catheters and other indwelling devices placed inside human body are prone to bacterial infection, causing serious risk to patients. Infections associated with implants are difficult to resolve, and hence the prevention of bacterial colonization of such surfaces is quite appropriate. In this context, the development of novel antimicrobial biomaterials is currently gaining momentum. We describe here the preparation and antibacterial properties of an enzyme-embedded polycaprolactone (PCL)-based coating, coimpregnated with the antibiotic gentamicin sulfate (GS). The enzyme uses PCL itself as substrate; as a result, the antibiotic gets released at a rate controlled by the degradation of the PCL base. In vitro drug release studies demonstrated sustained release of GS from the PCL film throughout its lifetime. By modulating the enzyme concentration in the PCL film, we were able to vary the lifetime of the coating from 33 h to 16 days. In the end, the polymer is completely degraded, delivering the entire load of the antibiotic. The polymer exhibited antibacterial properties against three test isolates: Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. Foley urinary catheters coated with the modified polymer exhibited sustained in vitro release of GS over a 60-h period. The results suggest that the antibiotic-plus-enzyme-loaded polymer can be used as tunable self-degrading antimicrobial biomaterial coating on catheters.
Collapse
|
30
|
Prokopovich P, Perni S, Piccirillo C, Pratten J, Parkin IP, Wilson M. Frictional properties of light-activated antimicrobial polymers in blood vessels. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:815-821. [PMID: 19784866 DOI: 10.1007/s10856-009-3882-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Accepted: 09/17/2009] [Indexed: 05/28/2023]
Abstract
The adhesion of microbes to catheter surfaces is a serious problem and the resulting infections frequently lead to longer hospitalisation and higher risk for the patient. Several approaches have been developed to produce materials that are less susceptible to microbial colonisation. One such approach is the incorporation of photoactivated compounds, such as Toluidine Blue O (TBO), in the polymeric matrix resulting in 'light-activated antimicrobial materials'. The insertion and removal of catheters can cause tissue damage and patient discomfort through frictional forces; hence the lubricity of a catheter material is also very important. In this work the tribological performance of silicone and polyurethane containing TBO and gold nanoparticles were evaluated using two different surfaces, the inner part of the aorta and the superior vena cava of sheep. Static and kinetic friction coefficients of these materials were measured using a tribometric device developed for in vitro applications using dry materials and those lubricated with blood. It was found that neither the preparation process nor the presence of TBO or gold nanoparticles, had an effect on the friction factors in comparison to those of untreated materials. In all cases, static and kinetic friction coefficients on aorta tissue were higher than those on vena cava due to higher surface roughness of the aorta. The presence of blood as a lubricant resulted in lower friction coefficients.
Collapse
Affiliation(s)
- Polina Prokopovich
- Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK
| | | | | | | | | | | |
Collapse
|
31
|
Wang X, Lünsdorf H, Ehrén I, Brauner A, Römling U. Characteristics of biofilms from urinary tract catheters and presence of biofilm-related components in Escherichia coli. Curr Microbiol 2009; 60:446-53. [PMID: 20012619 DOI: 10.1007/s00284-009-9563-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 12/01/2009] [Indexed: 11/27/2022]
Abstract
Long term catheterization of the urinary tract leads to bacterial colonization of the urine, whereby adherence to the catheter surface is a major determinative factor for colonization. Collection of bacterial isolates from urine and urinary catheters of 45 patients showed multi-species catheter-colonization, while Escherichia coli isolates were frequently found in the urine in high numbers. Biofilm formation of catheter and urine-derived E. coli isolates was associated with the presence of the fluA gene, loss of O-antigen, and expression of type 1 fimbriae. The second messenger cyclic di-GMP (cdiGMP), a major regulator of biofilm formation, regulated adherence to the catheter surface in a selected clinical isolate suggesting that the cdiGMP second messenger pathway may be a target for anti-biofilm therapeutic approaches.
Collapse
Affiliation(s)
- Xiaoda Wang
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, FE 280, SE-171 77, Stockholm, Sweden
| | | | | | | | | |
Collapse
|
32
|
Slow release of nitric oxide from charged catheters and its effect on biofilm formation by Escherichia coli. Antimicrob Agents Chemother 2009; 54:273-9. [PMID: 19884372 DOI: 10.1128/aac.00511-09] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Catheter-associated urinary tract infection is the most prevalent cause of nosocomial infections. Bacteria associated with biofilm formation play a key role in the morbidity and pathogenesis of these infections. Nitric oxide (NO) is a naturally produced free radical with proven bactericidal effect. In this study, Foley urinary catheters were impregnated with gaseous NO. The catheters demonstrated slow release of nitric oxide over a 14-day period. The charged catheters were rendered antiseptic, and as such, were able to prevent bacterial colonization and biofilm formation on their luminal and exterior surfaces. In addition, we observed that NO-impregnated catheters were able to inhibit the growth of Escherichia coli within the surrounding media, demonstrating the ability to eradicate a bacterial concentration of up to 10(4) CFU/ml.
Collapse
|
33
|
Noimark S, Dunnill CW, Wilson M, Parkin IP. The role of surfaces in catheter-associated infections. Chem Soc Rev 2009; 38:3435-48. [PMID: 20449061 DOI: 10.1039/b908260c] [Citation(s) in RCA: 174] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this critical review the biocidal efficacies of a variety of antimicrobial coatings currently in use for catheter surfaces are discussed to formulate the best strategy for decreasing the risk of catheter-associated infections. The development of new coatings containing antimicrobial chemicals and light-activated antimicrobial agents, and their applicability for use in catheters are summarised (132 references).
Collapse
Affiliation(s)
- Sacha Noimark
- Materials Chemistry Research Centre, Department of Chemistry, University College London, 20 Gordon Street, London, UK WC1H OAJ
| | | | | | | |
Collapse
|
34
|
|
35
|
Cottenye N, Teixeira F, Ponche A, Reiter G, Anselme K, Meier W, Ploux L, Vebert-Nardin C. Oligonucleotide nanostructured surfaces: effect on Escherichia coli curli expression. Macromol Biosci 2009; 8:1161-72. [PMID: 18683166 DOI: 10.1002/mabi.200800081] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Oligonucleotide model surfaces allowing independent variation of topography and chemical composition were designed to study the adhesion and biofilm growth of E.coli. Surfaces were produced by covalent binding of oligonucleotides and immobilization of nucleotide-based vesicles. Their properties were confirmed through a combination of fluorescence microscopy, XPS, ellipsometry, AFM and wettability studies at each step of the process. These surfaces were then used to study the response of three different strains of E.coli quantified in a static biofilm growth mode. This study led to convincing evidence that oligonucleotide-modified surfaces, independent of the topographical feature used in this study, enhanced curli expression without an increase in the number of adherent bacteria.
Collapse
Affiliation(s)
- Nicolas Cottenye
- Institut de Chimie des Surfaces et Interfaces, CNRS UPR 9069, Mulhouse Cedex, France
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Ndomba ALM, Smide B, Aarts C. Preventing IUC infections in Tanzanian patients; nurses’ knowledge, clinical practice and patients’ views. INTERNATIONAL JOURNAL OF UROLOGICAL NURSING 2008. [DOI: 10.1111/j.1749-771x.2008.00044.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|