Temperature Effects for High-Pressure Processing of Picornaviruses

Investigation of the effects of pre-pressurization temperature on the high-pressure inactivation for single strains of aichivirus (AiV), coxsackievirus A9 (CAV9) and B5 (CBV5) viruses, as well as human parechovirus-1 (HPeV) was performed. For CAV9, an average 1.99 log(10) greater inactivation was observed at 4 A degrees C after a 400-MPa-5-min treatments compared to 20 A degrees C treatments. For CBV5, an average of 2.54 log(10) greater inactivation was noted after 600-MPa-10-min treatments at 4 A degrees C in comparison to 20 A degrees C treatments. In contrast, inactivation was reduced by an average of 1.59 log(10) at 4 A degrees C for HPeV. AiV was resistant to pressure treatments of 600 MPa for as long as 15 min at 4, 20, and 30 A degrees C temperatures. Thus, different pre-pressurization temperatures result in different inactivation effects for picornaviruses.