scholarly journals Antimicrobial Activity of a Novel Catheter Lock Solution

2002 ◽  
Vol 46 (6) ◽  
pp. 1674-1679 ◽  
Author(s):  
Chirag B. Shah ◽  
Marc W. Mittelman ◽  
J. W. Costerton ◽  
Stephen Parenteau ◽  
Michael Pelak ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Staphylococcus Epidermidis ◽  
Hospital Costs ◽  
Bloodstream Infections ◽  
Microbial Colonization ◽  
Citrate Solution ◽  
Intravascular Catheter ◽  
Median Reduction ◽  
Lock Solution ◽  
Catheter Lock

ABSTRACT Intravascular catheter-associated bloodstream infections significantly increase rates of morbidity and hospital costs. Microbial colonization and development of biofilms, which are known to be recalcitrant to antibiotic therapy, often lead to the loss of otherwise patent vascular access systems. We evaluated a new taurolidine- and citrate-based catheter lock solution (Neutrolin; Biolink Corporation, Norwell, Mass.) for its activity against planktonic microbes, antimicrobial activity in a catheter model, and biofilm eradication activity. In studies of planktonic microbes, after 24 h of contact, 675 mg of taurolidine-citrate solution per liter caused >99% reductions in the initial counts of Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Entercoccus faecalis. A solution of 13,500 mg/liter was cidal for Candida albicans. Ports and attached catheters inoculated with 50 to 600 CFU of these bloodstream isolates per ml were locked with heparin or the taurolidine-citrate solution. After 72 h, there was no growth in the taurolidine-citrate-treated devices but the heparin-treated devices exhibited growth in the range of 6 × 102 to 5 × 106 CFU/ml. Biofilms were developed on silicone disks in modified Robbins devices with broth containing 6% serum (initial counts, 106 to 108 CFU/cm2). The axenic biofilms were treated for 24 h with taurolidine-citrate or heparin. Taurolidine-citrate exposure resulted in a median reduction of 4.8 logs, whereas heparin treatment resulted in a median reduction of 1.7 logs (P < 0.01). No significant differences in the effects of the two treatments against P. aeruginosa and C. albicans were observed. These findings suggest that taurolidine-citrate is a promising combination agent for the prevention and treatment of intravascular catheter-related infections.

scholarly journals Minocycline-EDTA-Ethanol Antimicrobial Catheter Lock Solution Is Highly Effective In Vitro for Eradication of Candida auris Biofilms

2020 ◽  
Vol 64 (4) ◽  
Author(s):  
Ruth A. Reitzel ◽  
Joel Rosenblatt ◽  
Bahgat Z. Gerges ◽  
Nylev Vargas-Cruz ◽  
Issam I. Raad
Keyword(s):  
Therapeutic Option ◽  
Bloodstream Infections ◽  
Central Line ◽  
Emerging Pathogen ◽  
Candida Auris ◽  
Content Type ◽  
Lock Solution ◽  
Highly Effective ◽  
Catheter Lock

ABSTRACT Candida auris is an emerging pathogen that can cause virulent central-line-associated bloodstream infections. Catheter salvage through the eradication of biofilms is a desirable therapeutic option. We compared taurolidine and minocycline-EDTA-ethanol (MEE) catheter lock solutions in vitro for the eradication of biofilms of 10 C. auris strains. MEE fully eradicated all C. auris biofilms, while taurolidine lock partially eradicated all of the C. auris biofilms. The superiority was significant for all C. auris strains tested (P = 0.002).

scholarly journals In VitroandIn Vivoactivity of a novel catheter lock solution against bacterial and fungal biofilms

2018 ◽  
Author(s):  
Jyotsna Chandra ◽  
Lisa Long ◽  
Nancy Isham ◽  
Pranab K Mukherjee ◽  
Gino DiSciullo ◽  
...  
Keyword(s):  
Rabbit Model ◽  
Bloodstream Infections ◽  
Central Line ◽  
Saline Control ◽  
Resistant Bacteria ◽  
Lock Solution ◽  
Catheter Lock ◽  
Adhesion Phase

Central line associated bloodstream infections (CLABSIs) are increasingly recognized to be associated with intralumenal microbial biofilms, and effective measures for the prevention and treatment of BSI remain lacking. This report evaluates a new commercially developed antimicrobial catheter lock solution (ACL) containing trimethoprim (5 mg/ml) and ethanol (25%) and CA-EDTA 3% for activity against bacterial and fungal biofilms using in vitro and in vivo (rabbit) catheter biofilm models. Biofilms were formed with bacterial (seven different species including vancomycin-resistant enterococcus, VRE) or fungal (C. albicans) species on catheter materials. Biofilm formation was evaluated by quantitative culture (colony forming units, CFUs) and scanning electron microscopy (SEM). Treatment with ACL inhibited growth of adhesion phase biofilms in vitro after 60 min (VRE) or 15 min (all others), while mature biofilms were eradicated after exposure for 2 or 4 h, compared to control. Similar results were observed for drug-resistant bacteria. In the catheterized rabbit model, when compared against heparinized saline control, ACL lock therapy significantly reduced the catheter bacterial (3.49 ± 0.75 vs. 0.03 ± 0.06 log CFU/catheter, respectively; P = 0.001) and fungal burden (2.48 ± 1.60 vs. 0.55 ± 1.19 log CFU/catheter segment, respectively; P = 0.012). SEM also demonstrated eradication of bacterial and fungal biofilms in vivo on catheters exposed to ACL, while vigorous biofilms were observed on untreated control catheters. Our results demonstrate that ACL was efficacious against both adhesion phase and mature biofilms formed by bacteria and fungi in vitro as well as in vivo.

scholarly journals A Novel Nonantibiotic Nitroglycerin-Based Catheter Lock Solution for Prevention of Intraluminal Central Venous Catheter Infections in Cancer Patients

2017 ◽  
Vol 61 (7) ◽  
Author(s):  
Anne-Marie Chaftari ◽  
Ray Hachem ◽  
Ariel Szvalb ◽  
Mahnaz Taremi ◽  
Bruno Granwehr ◽  
...  
Keyword(s):  
Adverse Events ◽  
Cancer Patients ◽  
Randomized Clinical Trials ◽  
Residual Effect ◽  
Bloodstream Infections ◽  
Venous Catheter ◽  
Central Line ◽  
Current Standard ◽  
Lock Solution ◽  
Catheter Lock

ABSTRACT For long-term central lines (CL), the lumen is the major source of central line-associated bloodstream infections (CLABSI). The current standard of care for maintaining catheter patency includes flushing the CL with saline or heparin. Neither agent has any antimicrobial activity. Furthermore, heparin may enhance staphylococcal biofilm formation. We evaluated the safety and efficacy of a novel nonantibiotic catheter lock solution for the prevention of CLABSI. Between November 2015 and February 2016, we enrolled 60 patients with hematologic malignancies who had peripherally inserted central catheters (PICC) to receive the study lock solution. The study lock consisted of 15 or 30 μg/ml of nitroglycerin in combination with 4% sodium citrate and 22% ethanol. Each lumen was locked for at least 2 h once daily prior to being flushed. After enrollment of 10 patients at the lower nitroglycerin dose without evidence of toxicity, the dose was escalated to the higher dose (30 μg/ml). There were no serious related adverse events or episodes of hypotension with lock administration. Two patients experienced mild transient adverse events (one headache and one rash) possibly related to the lock and that resolved without residual effect. The CLABSI rate was 0 on lock days versus 1.6/1,000 catheter days (CD) off lock prophylaxis, compared with a rate of 1.9/1,000 CD at the institution in the same patient population. In conclusion, the nitroglycerin-based lock prophylaxis is safe and well tolerated. It may prevent CLABSI when given daily to cancer patients. Large, prospective, randomized clinical trials are needed to validate these findings. (This study has been registered at ClinicalTrials.gov under identifier NCT02577718.)

scholarly journals In Vitro and In Vivo Activity of a Novel Catheter Lock Solution against Bacterial and Fungal Biofilms

2018 ◽  
Vol 62 (8) ◽  
Author(s):  
J. Chandra ◽  
L. Long ◽  
N. Isham ◽  
P. K. Mukherjee ◽  
G. DiSciullo ◽  
...  
Keyword(s):  
Rabbit Model ◽  
Bloodstream Infections ◽  
Central Line ◽  
Resistant Bacteria ◽  
Content Type ◽  
Lock Solution ◽  
Catheter Lock ◽  
Adhesion Phase

ABSTRACT Central-line-associated bloodstream infections are increasingly recognized to be associated with intraluminal microbial biofilms, and effective measures for the prevention and treatment of bloodstream infections remain lacking. This report evaluates a new commercially developed antimicrobial catheter lock solution (ACL), containing trimethoprim (5 mg/ml), ethanol (25%), and calcium EDTA (Ca-EDTA) (3%), for activity against bacterial and fungal biofilms, using in vitro and in vivo (rabbit) catheter biofilm models. Biofilms were formed by bacterial (seven different species, including vancomycin-resistant Enterococcus [VRE]) or fungal (Candida albicans) species on catheter materials. Biofilm formation was evaluated by quantitative culture (CFU) and scanning electron microscopy (SEM). Treatment with ACL inhibited the growth of adhesion-phase biofilms in vitro after 60 min (VRE) or 15 min (all others), while mature biofilms were completely inhibited after exposure for 2 or 4 h, compared to control. Similar results were observed for drug-resistant bacteria. Compared to the heparinized saline controls, ACL lock therapy significantly reduced the catheter bacterial (3.49 ± 0.75 versus 0.03 ± 0.06 log CFU/catheter; P = 0.016) and fungal (2.48 ± 1.60 versus 0.55 ± 1.19 log CFU/catheter segment; P = 0.013) burdens in the catheterized rabbit model. SEM also demonstrated eradication of bacterial and fungal biofilms in vivo on catheters exposed to ACL, while vigorous biofilms were observed on untreated control catheters. Our results demonstrated that ACL was efficacious against both adhesion-phase and mature biofilms formed by bacteria and fungi in vitro and in vivo.

scholarly journals Non-Antibiotic Antimicrobial Catheter Lock Solutions in Patients on Home Parenteral Nutrition

Nutrients ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1165 ◽  
Author(s):  
Jessica Noelting ◽  
Brian Jurewitsch ◽  
Johane Allard
Keyword(s):  
Parenteral Nutrition ◽  
Central Venous Access ◽  
Bloodstream Infections ◽  
Venous Access ◽  
Home Parenteral Nutrition ◽  
Microbial Colonization ◽  
Central Venous ◽  
New Methods ◽  
Catheter Lock

Patients on home parenteral nutrition (HPN) are dependent on central venous access for long-term sustenance, and catheter-related bloodstream infections (CRBSIs) are a major cause of morbidity and mortality in this patient population. As such, there is much interest in finding new methods for preventing CRBSIs in patients on HPN. As it is thought that these infections are preceded by microbial colonization of the catheter, one approach is to use antimicrobial catheter lock solutions. Although antibiotic catheter lock solutions have been present for decades, their use has been mostly limited to the treatment of CRBSIs due to concern for promoting microbial resistance. Recently, however, with the advent of non-antibiotic antimicrobial catheter lock solutions, this approach is gaining popularity as a promising method to decrease rates of CRBSI in HPN patients.

scholarly journals Antimicrobial Activity of B-Lock against Bacterial and Candida spp. Causing Catheter-Related Bloodstream Infections

2011 ◽  
Vol 55 (9) ◽  
pp. 4430-4431 ◽  
Author(s):  
M. A. Ghannoum ◽  
N. Isham ◽  
M. R. Jacobs
Keyword(s):  
Antimicrobial Activity ◽  
Bloodstream Infections ◽  
Triple Combination ◽  
Bacterial Strains ◽  
Candida Spp ◽  
Content Type ◽  
Potential Value ◽  
Lock Solution ◽  
Prevention And Treatment ◽  
Intravascular Catheters

ABSTRACTThe triple combination trimethoprim, EDTA, and ethanol (B-Lock), is an antimicrobial lock solution for use in indwelling intravascular catheters to prevent and treat catheter-associated infections. B-Lock demonstrated MICs of ≤0.05% (percentage of solution) againstCandidaspp. (n= 125) and 0.003% to 25% against bacterial strains (n= 175). B-Lock was also fungicidal against the majority of theCandidastrains at 6% to 25%. B-Lock demonstrates potential value for the prevention and treatment of catheter-associated infections.

Catheter lock solutions to prevent CVAD-related infection

2020 ◽  
Vol 29 (3) ◽  
pp. S25-S29 ◽  
Author(s):  
Janice A Gabriel
Keyword(s):  
Central Venous Access ◽  
Bloodstream Infections ◽  
Venous Access ◽  
Vascular Access Devices ◽  
Global Challenge ◽  
Lock Solution ◽  
Number Of Patients ◽  
Catheter Lock ◽  
Venous Access Device

Demand for vascular access devices to meet the clinical needs of patients has increased dramatically in recent years, with a disproportionate increase in the numbers of individuals requiring a central venous access device (CVAD). With this increasing number of patients becoming recipients of CVADs globally each year, the associated incidence of catheter-related bloodstream infections (CRBSIs) is also increasing. In addition, there is strong evidence to demonstrate that antimicrobial resistance is a global challenge. There is a need to change the approach to CVAD management and get back to basics through a clearer understanding of how the incidence of CRBSIs can be reduced. This includes the role of biofilm and how its development can be inhibited through the use of an effective lock solution, and the avoidance of antibiotics.

Tetrasodium EDTA as a Novel Central Venous Catheter Lock Solution Against Biofilm

2005 ◽  
Vol 26 (6) ◽  
pp. 515-519 ◽  
Author(s):  
Steven L. Percival ◽  
Peter Kite ◽  
Kerrie Eastwood ◽  
Ricardo Murga ◽  
Janice Carr ◽  
...  
Keyword(s):  
Central Venous Catheter ◽  
Bloodstream Infections ◽  
Venous Catheter ◽  
Viable Cell ◽  
Infusion Therapy ◽  
Central Venous ◽  
Home Infusion Therapy ◽  
Cell Counts ◽  
Lock Solution ◽  
Catheter Lock

AbstractBackground:Central venous catheter (CVC)-related bloodstream infections (BSIs) are known to increase rates of morbidity and mortality in both inpatients and outpatients, including hematology-oncology patients and those undergoing hemodialysis or home infusion therapy. Biofilm-associated organisms on the lumens of these catheters have reduced susceptibility to antimicrobial chemotherapy. This study tested the efficacy of tetrasodium EDTA as a catheter lock solution on biofilms of several clinically relevant microorganisms.Methods:Biofilms ofStaphylococcus epidermidis, methicillin-resistantS. aureus, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, andCandida albicanswere grown to levels of approximately 1 × 105colony-forming units (CFU)/cm−1on CVC segments in a model system, then subjected to the tetrasodium EDTA lock treatment.Results:Comparisons of biofilms before and after exposure to the 40-mg/mL−1tetrasodium EDTA lock for 21 hours showed that the biofilm viable cell counts of all organisms tested were significantly reduced (P< .05) after exposure to the treatment.Conclusion:Antimicrobial lock treatment using 40 mg/mL−1of tetrasodium EDTA for at least 21 hours could significantly reduce or potentially eradicate CVC-associated bio-films of clinically relevant microorganisms (Infect Control Hosp Epidemiol2005;26:515-519).

Sign in / Sign up

Export Citation Format

Share Document