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Updated: Aug 20, 2026

Evaluating the Effect of Coated Filters and Pre-Filters on the Infectivity and Concentration of Aerosolized Phi6 Virus
Published on: May 29, 2026
PDA Virus Filter Task Force update
1BioReliance, Rockville, MD 20850, USA. gsofer@bioreliance.com
Abstract:
The PDA Virus Filter Task Force has made significant progress in producing a method that will standardize the nomenclature for virus-removal filters that remove large viruses. A method for preparation of the model bacteriophage, PR 772, has also been produced and will shortly undergo a feasibility study. A technical report on the use of virus removal filters is also being prepared.
Insights
The PDA Virus Filter Task Force is standardizing nomenclature for large virus removal filters. A method for preparing the PR 772 bacteriophage model is also being developed for feasibility testing.
Area of Science:
- Biotechnology
- Filtration Technology
- Virology
Background:
- Standardized nomenclature is crucial for effective virus removal filter characterization.
- The development of reliable methods for preparing model viruses is essential for filter validation.
Purpose of the Study:
- To establish a standardized nomenclature system for virus-removal filters targeting large viruses.
- To develop and validate a preparation method for the PR 772 bacteriophage as a model organism for filter studies.
Main Methods:
- Developing a nomenclature system for virus-removal filters.
- Establishing a protocol for the preparation of the PR 772 bacteriophage.
- Conducting feasibility studies for the prepared model bacteriophage.
Main Results:
- Significant progress has been made in standardizing nomenclature for large virus-removal filters.
- A method for the preparation of the PR 772 bacteriophage model has been established.
- A technical report on virus removal filter usage is in preparation.
Conclusions:
- The initiative is advancing the standardization of virus filter terminology.
- The development of the PR 772 bacteriophage preparation method will support filter performance evaluation.
- Further research and reporting on virus removal filter applications are ongoing.

