No abstract

Human parvovirus B19 can be transmitted by coagulation factor concentrates and is highly resistant to virucidal methods. To evaluate whether the additional removal of virus by chromatographic methods during the manufacture of high-purity concentrates reduces the risk of B19 transmission, we have prospectively evaluated the rate of anti-B19 seroconversion in two groups of susceptible (anti-B19 negative) hemophiliacs infused with high-purity, heated (pasteurized) or solvent-detergent-treated factor VIII concentrates. Both products infected a relatively high proportion of patients (nine of 20).

This prospective study indicates that very high temperatures applied to lyophilized concentrates appear to prevent the transmission of hepatitis A virus to hemophiliacs. However, B19 parvovirus still contaminates concentrates despite the use of this robust virucidal method.