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Updated: Jan 10, 2026

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Published on: December 16, 2016

Insights into PET-Microplastics effect on pathogenic bacteria.

Selma Hamimed¹, Rayane Merazka², Mouna Keroui²

¹Molecular and Cellular Biology Laboratory (MCBL), Department of Molecular and Cellular Biology, Faculty of Nature and Life Sciences, University of Jijel, Jijel, Algeria. selma.hamimed@univ-jijel.dz.

World Journal of Microbiology & Biotechnology

|November 19, 2025

Summary

Polyethylene terephthalate microplastics (PET-MPs) exposure affects pathogenic bacteria differently, altering their growth and increasing antibiotic resistance. Further research is needed to confirm molecular links between microplastics and bacterial DNA.

Keywords:

Antibiotic resistance Microplastics pollution PET-MPs Pathogenic bacteria Plastic toxicity

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Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris

Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris

Published on: July 28, 2018

Area of Science:

Environmental Science
Microbiology
Toxicology

Background:

Microplastics (MPs) pose growing environmental and health risks.
Toxicological impacts of polyethylene terephthalate microplastics (PET-MPs) are not well understood.

Purpose of the Study:

Investigate dose-dependent physiological and antimicrobial susceptibility responses of pathogenic bacteria to PET-MPs.
Determine how PET-MPs affect bacterial growth, protein activity, and antibiotic resistance.

Main Methods:

Exposed four pathogenic bacterial strains (E. coli, P. aeruginosa, S. typhimurium, S. aureus) to varying PET-MPs concentrations.
Monitored bacterial growth, biomass, protein disruption, and catalase activity.
Assessed changes in antimicrobial susceptibility after PET-MPs acclimation.

Main Results:

Observed species- and dose-dependent bacterial growth responses to PET-MPs.
E. coli and P. aeruginosa growth were stimulated, while S. aureus and S. typhimurium showed biphasic responses (inhibition then stimulation).
PET-MPs exposure caused protein disruption, upregulated catalase activity, and enhanced bacterial multidrug resistance.

Conclusions:

Pathogenic bacteria exhibit varied physiological and adaptive responses to PET-MPs exposure.
PET-MPs can induce multidrug resistance in bacteria, highlighting potential environmental health risks.
Further studies are required to confirm molecular interactions between PET-MPs and bacterial genomic DNA.