Self-assembled capsules of poly-N-glycidyl histidine ether–tannic acid for inhibition of biofilm formation in urinary catheters

RSC Advances ◽  
2015 ◽  
Vol 5 (85) ◽  
pp. 69215-69219 ◽  
Author(s):  
Denial Mahata ◽  
Santi M. Mandal ◽  
Amit Basak ◽  
Golok B. Nando
Keyword(s):  
Tannic Acid ◽  
Biofilm Formation ◽  
Urinary Catheters ◽  
Acid Complex ◽  
Biocompatible Polymer ◽  
Catheter Surface ◽  
Self Assembled

A coating made of N-glycidyl-histidine ether–tannic acid complex, a biocompatible polymer, onto a catheter surface inhibits the biofilm formation and helps to control the catheter associated infections caused by biofilm forming MDR pathogens.

Urinary Catheters and Biofilm Formation

2013 ◽  
Vol 3 (3) ◽  
pp. 196-203 ◽  
Author(s):  
Daniele Minardi ◽  
Alessandro Conti ◽  
Matteo Santoni ◽  
Daniele Cantoro ◽  
Oscar Cirioni ◽  
...  
Keyword(s):  
Biofilm Formation ◽  
Urinary Catheters

scholarly journals Effect of tannic and gallic acids alone or in combination with carbenicillin or tetracycline on Chromobacterium violaceum CV026 growth, motility, and biofilm formation

2015 ◽  
Vol 61 (7) ◽  
pp. 487-494 ◽  
Author(s):  
Devendra H. Dusane ◽  
Che O’May ◽  
Nathalie Tufenkji
Keyword(s):  
Antibacterial Activity ◽  
Gallic Acid ◽  
Tannic Acid ◽  
Bacterial Growth ◽  
Biofilm Formation ◽  
Opportunistic Pathogen ◽  
Chromobacterium Violaceum ◽  
Minimum Inhibitory Concentrations

Chromobacterium violaceum is an opportunistic pathogen that causes infections that are difficult to treat. The goal of this research was to evaluate the effect of selected tannins (tannic acid (TA) and gallic acid (GA)) on bacterial growth, motility, antibiotic (carbenicillin, tetracycline) susceptibility, and biofilm formation. Both tannins, particularly TA, impaired bacterial growth levels and swimming motilities at sub-minimum inhibitory concentrations (sub-MICs). In combination with tannins, antibiotics showed increased MICs, suggesting that tannins interfered with antibacterial activity. Sub-MICs of tetracycline or TA alone enhanced biofilm formation of C. violaceum; however, in combination, these compounds inhibited biofilm formation. In contrast, carbenicillin at sub-MICs was effective in inhibiting C. violaceum biofilm formation; however, in combination with lower concentrations of TA or GA, biofilms were enhanced. These results provide insights into the effects of tannins on C. violaceum growth and their varying interaction with antibiotics used to target C. violaceum infections.

scholarly journals Effect of tannic acid on urease and protease produced from Proteus mirabilis

2019 ◽  
Vol 13 (1) ◽  
pp. 82-86
Author(s):  
Omar S. Al-Zaidi ◽  
Luma abd alhady Zwein
Keyword(s):  
Tannic Acid ◽  
Biofilm Formation ◽  
Inhibitory Effect ◽  
Protease Production ◽  
Contaminated Water ◽  
Negative Bacterium ◽  
Urine Ph ◽  
Back Ground ◽  
Vitek 2 ◽  
Different Sources

Back ground: P.mirabilis is a gram negative bacterium, motile with its peritrichous flagella .Widely distributed in environment, especially in contaminated water and soil, Many virulence factors like LPS, urease, protease, hemolysin and biofilm formation play an important roles in the pathogenicity of P. mirabilis. Urease is a Nickel containing enzyme causes elevation of urine pH after hydrolyzing urea to ammonia and CO2 forming stones that blocks the urinary track. Aims: The effect of tannic acid on the production of urease and protease.                                                                        Material and methods: Twenty one isolates of Proteus were collected from different sources, Clinical and animal sources all isolates were cultured on MacConkey and blood agar and identification of P. mirabilis by, Vitek -2 compact system. Determine the effect of tannic acid on the production of urease and protease.                                                                                              Results: Twenty one isolates of Proteus were identified depending on Vitek-2 compact system, after identification, it turns out that only 18  isolate were P. mirabilis. All isolates were 100% able to produce urease and 72.2%  isolate were able to produce protease. The addition of tannic acid showed an inhibitory effect on urease and protease production. Conclusion: The effect of tannic acid on urease and protease depending on concentration, type of strain, incubation period, number of isolates and truculence of isolate.  

scholarly journals Effects of Experimental Agents Containing Tannic Acid or Chitosan on the Bacterial Biofilm Formation in Situ

Biomolecules ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1315
Author(s):  
Anton Schestakow ◽  
Matthias Hannig
Keyword(s):  
Hydrochloric Acid ◽  
Tannic Acid ◽  
Biofilm Formation ◽  
Antibacterial Properties ◽  
Positive Control ◽  
Bacterial Biofilm ◽  
Dental Biofilm ◽  
Acid Ph ◽  
Bovine Enamel

Chitosan and tannic acid are known for their antibacterial properties. In the present in-situ study, their antibacterial and anti-adherent effects on biofilm formation on enamel were investigated. Six subjects carried upper jaw splints with bovine enamel specimens, allowing in-situ biofilm formation. During the two-day trial, subjects rinsed with experimental solutions that contained either chitosan, tannic acid (pH = 2.5), tannic acid (pH = 7) or hydrochloric acid. Water served as the negative and chlorhexidine as the positive control. Rinsing occurred four or five times following two different rinsing protocols to investigate both the immediate and long-lasting effects. After 48 h of intraoral exposure, the dental plaque was stained with LIVE/DEAD® BacLight, and fluorescence micrographs were evaluated by using the software ImageJ. The results were verified by scanning electron microscopy. Rinsing with chitosan resulted in little immediate antibacterial and anti-adherent effects but failed to show any long-lasting effect, while rinsing with tannic acid resulted in strong immediate and long-lasting effects. Except for a slightly lower antibacterial effect, the neutral solution of tannic acid was as good as the acidic solution. Hydrochloric acid showed neither an antibacterial nor an anti-adherent effect on dental biofilm formation. Experimental solutions containing tannic acid are promising anti-biofilm agents, irrespective of the pH values of the solutions. Chitosan, on the other hand, was not able to prevent biofilm formation.

Halloysite nanotubes immobilized by chitosan/tannic acid complex as a green flame retardant for bamboo fiber/poly(lactic acid) composites

2020 ◽  
Vol 138 (1) ◽  
pp. 49621
Author(s):  
Xiaobei Jin ◽  
Elin Xiang ◽  
Rong Zhang ◽  
Daochun Qin ◽  
Mingliang Jiang ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Flame Retardant ◽  
Tannic Acid ◽  
Halloysite Nanotubes ◽  
Bamboo Fiber ◽  
Poly Lactic Acid ◽  
Acid Complex
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