Table 3.

Interpretation of bacterial and phage counts at a single time point after treatment.

Phage density	Bacterial density	Implication
High	High	Low adsorption rate or partial bacterial refuge, poor control of bacteria. Gives insight to failure
High	Low	Not sustainable – a possible transitory step following successful control of bacteria, before phage densities have equilibrated
Low	High	Phage unable to replicate adequately; possible genetic resistance of bacteria or inaccessible refuge
Low	Low	Treatment success