laboratory - scale vertical tower static chamber steam Protection 70(1):200–203. pasteurization unit against Escherichia coli O157:H7, Phebus, R. K., A. L. Nutsch, D. E Schafer, R. C. Wilson, Salmonella Typhimurium, and Listeria innocua on M. J. Riemann, J. D. Leising, C. L. Kastner, J. R. prerigor beef tissue.