Water, Journal Year: 2024, Volume and Issue: 16(15), P. 2155 - 2155

Published: July 30, 2024

Emerging pollutants such as microplastics in water environments readily accumulate microorganisms on their surfaces, forming biofilms and concentrating antibiotic-resistant bacteria (ARB) antibiotic resistance genes (ARGs). Consequently, microplastic have attracted the attention of researchers. Horizontal gene transfer (HGT) ARGs is one primary ways that acquire resistance. Most studies focus effects nanomaterials suspended bacteria, but hotspots for horizontal also warrant significant investigation. This study primarily explored compared nano-titanium dioxide conjugation frequency biofilms. Nano-titanium could promote ARG both biofilms, with a greater effect former. The mechanism involved promoting production reactive oxygen species (ROS) biofilm increasing synthesis outer membrane proteins, enhancing cell permeability, elevating expression levels conjugation-related genes, thereby facilitating ARGs. Biofilm being heavily encased protected by extracellular polymeric substances (EPS), exhibit to external environmental pressure, resulting weaker impact bacteria. reveals risk within induced nanomaterials, providing valuable insights into risks dissemination environments.

Language: Английский