Parvovirus 4-like virus in blood products

Area of Science:

• Virology
• Biotechnology
• Animal Health

Background:

• Parvovirus 4 (PARV4)-like viruses are a concern in biological product safety.
• Understanding their prevalence in animal sources is crucial for manufacturing processes.

Purpose of the Study:

• To screen porcine plasma and factor VIII preparations for PARV4-like viruses.
• To assess the potential concentration of these viruses during factor VIII production.

Main Methods:

• Screening of porcine plasma samples.
• Analysis of factor VIII preparations.
• Detection of parvovirus 4 (PARV)-like viral agents.

Main Results:

• PARV4-like viruses were detected in porcine plasma, though prevalence was relatively low.
• A notable concentration of PARV4-like viruses was observed during the manufacturing of factor VIII.
• Evidence suggests co-evolution of human and porcine PARV4-like viruses with their hosts.

Conclusions:

• Porcine plasma and factor VIII preparations can harbor PARV4-like viruses.
• Factor VIII manufacturing processes may concentrate these viruses, posing a potential risk.
• The co-evolutionary patterns indicate a long-standing relationship between these viruses and their hosts.