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NanoSight Nanoparticle Detection Technique Contributes to Virus Production to Counter MRSA

Published: Tuesday, December 09, 2008
Last Updated: Tuesday, December 09, 2008
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Researchers at the University of Strathclyde use virus particle detection and counting using Nanoparticle Tracking Analysis to combat MRSA.

Virus particle detection and counting using Nanoparticle Tracking Analysis is providing essential information for researchers at the University of Strathclyde’s Institute of Pharmacy and Biomedical Sciences (SIPBS).

This team develops methods to employ naturally-occurring bacteriophages to combat MRSA and other bacteria. MRSA – or Methicillin resistant Staphylococcus aureus – is a variation of the bacterium Staphylococcus aureus, which has developed resistance to most antibiotics, making it difficult to treat and potentially deadly.

Whilst the “Superbug” can be killed with detergents, detergent dilution and application is often inconsistent and ineffective, hence the bacteriophage route.

It is in characterizing bacteriophage cultures that NanoSight comes into play, employed within a team lead by Dr Mike Mattey, honorary lecturer at SIPBS. Prior to deploying bacteriophages as a dry-coat, to protect high-risk bacterial invasion sites, the cultures need characterization and their concentration needs assessing. NanoSight allows the team to view and size viral cultures rapidly, in real time and at low cost.

“The characterization of virus populations requires assessment of aggregation in the 20nm – 1,000nm range,” says Dr Mattey. “NanoSight provides fast and easy quantitative sample characterization not possible with other methods (such as using the Beckman Coutler DLS, plaque assay & SEM) and at a much lower cost. Additionally, NanoSight’s technology provides a reassuring view of the particle population that supports the counting results.”

The NanoSight LM system uses a novel employment of laser light scattering. These instruments visualize and dynamically size populations of suspended particles on an individual basis down to a particle size of approx 20nm, dependent on material. NanoSight directly tracks the Brownian motion of each and every particle separately but simultaneously using a CCD camera and from a high resolution plot of the particle size distribution profile.

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