PDA TR 27 was prepared by membersof the PDA Sterilizing Filtration of Liquids Task Force.

PDA's original Technical Report No. 26, published in 1998 described the use and validation of sterilizing filtration to a generation of pharmaceutical scientists and engineers. This revision was developed in response to enhancements in filtration technologies and recent additional regulatory requirements within the pharmaceutical industry. References to scientific publications and international regulatory documents are provided where more detail and supportive data may be found. This report underwent an eleven-week global technical peer review that included feedback from the Americas, Asia-Pacific and Europe.