RT Journal Article SR Electronic T1 Meeting Report—Workshop on Spike Characterizations and Virus Removal by Filtration: Trends and New Developments JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 215 OP 220 DO 10.5731/pdajpst.2014.00981 VO 68 IS 3 A1 Hannelore Willkommen A1 Johannes Blümel A1 Kurt Brorson A1 Dayue Chen A1 Qi Chen A1 Albrecht Gröner A1 Brian R. Hubbard A1 Thomas R. Kreil A1 Michael Ruffing A1 Sol Ruiz A1 Dorothy Scott A1 Glenda Silvester YR 2014 UL http://journal.pda.org/content/68/3/215.abstract AB This workshop was held on June 3, 2013, in Berlin, Germany, in conjunction with the PDA Virus & TSE Safety Forum 2013. A total of nine speakers presented on key considerations of virus filtration, including a historical overview and emerging trends in evaluating parvovirus filters. Several talks addressed understanding the mechanism of virus capture and breakthrough by filters, as well as addressing this risk by carefully controlling transmembrane pressure. Improvements to validation studies were proposed via the use of highly purified virus preparations, more relevant models such as Chinese Hamster Ovary retrovirus-like particles, as well as new assays for virus quantification. The workshop ended with a panel discussion covering a range of topics including virus breakthrough, up-stream media treatment, virus spike preparation quality control, and regulatory expectations.