Persistence of Foot-and-Mouth Disease Virus in Dried Casein 1

Abstract

Dried casein produced from pasteurized milk of dairy cows infected with foot-and-mouth disease (FMD) virus retained infectivity for cattle in one of seven tests for 42 days of storage at 25 C. Thus, infections FMD virus can persist after pasteurization of the milk at 72 C for 15 sec., acid precipitation and washing of casein, followed by drying of the casein in a hot air flow and conversion to sodium caseinate.