Fig. 2. Growth of Listeria innocua (MPN) during storage of cold smoked salmon at 5.5 C. Cold smoked salmon had been treated with 500 MPa for 10 (-,-), 20 (--), 30 (-A-) and 60 (---)s. Samples not treated with HPP used as control (unspiked->-,spiked-:-). Mean of two samples (mean  SD). Listeria concentration before pressure was 4.5 103 cfu/g.