1887

Abstract

High hydrostatic pressure is a mild technology compared with high temperatures and is commonly used for food pasteurization. Crude brain homogenates of terminally diseased hamsters infected with scrapie 263K strain were heated at 60 °C and/or pressurized up to 1000 MPa for 2 h. Prion proteins were analysed for their proteinase K sensitivity using a Western blot technique. PrP pressurized with 500 MPa or above proved to be proteinase K sensitive. To test the remaining infectivity of the pressurized material, hamsters were infected intracerebrally. Results showed a greatly delayed onset of disease (from 80 up to 153 days) when samples had been pressurized at 500 MPa and above. An increase in the survival rate was also observed: 47 % survival over 180 days was seen following infection with homogenates pressurized at 700–1000 MPa.

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2004-01-01
2020-07-11
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