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Press Releases

PDA Announces Availability of ANSI/PDA Standard 04-2021 Phage Retention Nomenclature Rating for Small and Large Virus-Retentive Filters

For Immediate Release:
02/26/2021
Media Inquiries:
Walter Morris
/ [email protected] /
13016565900148

The Parenteral Drug Association (PDA) announced the availability of ANSI/PDA Standard 04-2021 Phage Retention Nomenclature Rating for Small and Large Virus-Retentive Filters. This standard addresses virus-removal filters that retain viruses by a size-exclusion mechanism. The objective is to assist users/manufacturers in selecting the most appropriate filter for their specific application needs.

ANSI/PDA Standard 04-2021 is intended to:

  • Provide detailed methods and acceptance criteria for testing bacteriophage (also referred to as phage) retention by large- and small-virus retentive filters,
  • Provide methods for preparing and enumerating suitable sized bacteriophage (PP7 and PR772 as models for small and large viruses, respectively) as test items, and
  • Guide selection of appropriately rated filters as defined by suppliers in a standardized manner using a risk-based approach.

ANSI/PDA Standard 04-2021 can be purchased at the PDA Bookstore.