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Updated: Jun 6, 2026

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Evaluation of Antimicrobial Activities of Nanoparticles and Nanostructured Surfaces In Vitro
Published on: April 21, 2023
Analysis of microbial contamination in nanoparticle formulations
Timothy M Potter1, Marina A Dobrovolskaia
1Nanotechnology Characterization Laboratory, Advanced Technology Program, SAIC-Frederick, Inc., National Cancer Institute at Frederick, Frederick, MD, USA.
Methods in Molecular Biology (Clifton, N.J.)
|December 1, 2010
Summary
This study details a method for quantifying microbial contamination in nanoparticle formulations. The protocol ensures product safety for cell cultures and animal studies by testing for yeast, mold, and bacteria.
Area of Science:
- Microbiology
- Nanotechnology
- Pharmaceutical Science
Background:
- Nanoparticle formulations require stringent microbial contamination control.
- Ensuring the purity of nanoparticles is critical for preclinical research.
- Microbial contaminants can compromise study results and animal welfare.
Purpose of the Study:
- To describe a quantitative procedure for determining microbial contamination in nanoparticle formulations.
- To provide a reliable method for ensuring the safety of nanoparticles for biological applications.
- To prevent microbial contamination of cell cultures and animal models.
Main Methods:
- Utilizes Millipore sampler devices for microbial testing.
- Encompasses quantitative determination of yeast, mold, and bacteria.
- Integrates standard microbiological techniques for nanoparticle analysis.
Main Results:
- A validated protocol for microbial contamination assessment in nanoparticles.
- Demonstrates the effectiveness of the Millipore sampler for this application.
- Provides a basis for quality control in nanoparticle development.
Conclusions:
- The described procedure offers a robust method for quantifying microbial contamination in nanoparticle formulations.
- This approach is vital for safeguarding cell cultures and animal subjects in preclinical studies.
- The protocol supports the safe advancement of nanoparticle-based therapeutics and research.

