Antimicrobial and anti-biofilm activities of photosynthesized Ag@TiO2 and Ag@N-TiO2 nanocomposites against clinically isolated multidrug resistance Klebsiella pneumoniae

Firdausy, Alif Firman ORCID: https://orcid.org/0000-0001-7373-0336, Roza, Liszulfah, Khan, Mohammad Mansoob ORCID: https://orcid.org/0000-0002-8633-7493 and Wafi, Abdul ORCID: https://orcid.org/0000-0002-9717-0094 (2024) Antimicrobial and anti-biofilm activities of photosynthesized Ag@TiO2 and Ag@N-TiO2 nanocomposites against clinically isolated multidrug resistance Klebsiella pneumoniae. Chemical Papers. ISSN 2585-7290

Text 20890.pdf Download (3MB)

Abstract

The rise of drug-resistant bacterial strains is escalating due to the ability to produce biofilms shielding bacteria from antimicrobial agents. Consequently, novel approaches are imperative for managing biofilm-related infections in healthcare settings. Silver-based nanoparticles have revealed potential antimicrobial characteristics against various bacteria. In the present work, silver-modified TiO2 (Ag@TiO2) and silver-modified/N-doped TiO2 (Ag@N-TiO2) nanocomposites were synthesized using the sol–gel and photochemical deposition under UV light illumination. FTIR, XRD, and DRS were performed to characterize the vibrational, structural, and optical properties of the synthesized materials, respectively. In addition, FE-SEM and EDX analysis were also utilized to determine the surface morphology, particle size, and elemental composition of the prepared materials. Furthermore, the synthesized Ag@TiO2 and Ag@N-TiO2 nanocomposites were explored and compared for antimicrobial and anti-biofilm agents against clinically isolated multidrug-resistant (MDR) Klebsiella pneumoniae (K. pneumoniae) on the silicone rubber as a urinary catheter material in the medical devices. The results showed that both Ag@TiO2 and Ag@N-TiO2 composites exhibited antimicrobial activities compared to negative control. The Ag−3@TiO2 composite possessed a highest inhibition zone (77.29%) against MDR K. pneumoniae. In addition, anti-biofilm assay through the crystal violet method showed that Ag−1@TiO2 revealed an optimum inhibition (54.20%) compared to other samples. In conclusion, Ag@TiO2 and Ag@N-TiO2 nanocomposites have exhibited promising antimicrobial and anti-biofilm agents in medical devices, providing an effective inhibition toward the bacterial growth and biofilm formation of MDR K. pneumoniae.

Item Type:	Journal Article
Keywords:	Antimicrobial · Anti-bioflm · Multidrug-resistant · Klebsiella pneumonia; Silver-doped TiO2; Silver/nitrogen; co-doped TiO2
Subjects:	11 MEDICAL AND HEALTH SCIENCES > 1108 Medical Microbiology > 110801 Medical Bacteriology 11 MEDICAL AND HEALTH SCIENCES > 1115 Pharmacology and Pharmaceutical Sciences > 111504 Pharmaceutical Sciences
Divisions:	Faculty of Medical and Health Sciences > Department of Pharmacy
Depositing User:	Alif Firman Firdausy
Date Deposited:	28 Oct 2024 12:41

Downloads

Origin of downloads

Actions (login required)

View Item