Abstract
The complete inactivation of Foot and Mouth Disease (FMD) virus is a critical requirement in the production of FMD vaccine to ensure the safety of the product. Binary ethyleneimine (BEI) is an aziridine compound, produced from bromoethylamine hydrobromide (BEA) commonly used for the inactivation of FMD virus during vaccine manufacturing. The validation of BEI, when used as an inactivant, is essential to ensure the quality of the inactivating agent and the validity of the process. In the present study, the inactivation kinetics of Foot and Mouth Disease virus (O, A and Asia-1 serotypes) were determined for different concentrations of BEI (0.4 mM, 0.8 mM, 1.2 mM, 1.6 mM and 2.0 mM). Statistically significant differences in the inactivation kinetics were observed between 0.4 mM and 1.6 mM of BEI. The results indicated that BEI at 1.6 mM was able to inactivate the FMD virus within 8–10 h. Increasing the concentration of BEI beyond 1.6 mM did not appreciably improve the inactivation process. No differences in the inactivation kinetics were found between the various serotypes studied. This study can be used as a guideline for routine procedures for validating the quality of BEA and the inactivation process.
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