Table 2. Demonstration of the role of the HPI in the grazing resistance.
Strain | IAI51 pCP1 | + | + | ++ |
IAI51 irp- | +++ | ++++ | ++++ | |
IAI51 | − | + | − | |
606 | +++++ | +++++ | +++++ | |
1 | 2 | 3 | ||
log(number amoeba) |
Bacterial lysis plaques (strains REL 606, IAI51, IAI51 irp-, IAI51 pCP1) observed six days after plating. A density of 108 bacteria was plated with 10, 102 and 103 amoebae. (+) represents the number of replicates with lysis plaques, (−) means no replicate showing plaques.