7.6. Target Differences

Even if the characteristics of the medium are exactly constant, the substances suspended in the medium (i.e., microorganisms, enzymes) will not react in an identical manner to the applied field (Hodgins and Mittal, 2002). Some bacteria are more susceptible to PEF treatments than others. For example, Wouters et al. (2001b) showed that there were differences between the susceptibility of two species of Lactobacillus to PEF. L. fermentum strain PW7 was more PEF-resistant and exhibited less membrane permeabilization than L. plantarum strain LA 10-11. These researchers also showed that for Ecoli, S. cerevisiae, L. plantarum, and L. innocua the efficiency of PEF inactivation is dependent on organism and strain. It is also noteworthy ...

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