DOX can count the number of total viable cells and coliforms (quantitative test), and detect the presence of E. coli (qualitative test). DOX can also count Staphylococcus aureus and salmonella spp., types of food-poisoning bacteria.

First, DOX cannot count anything but bacteria.(For example, it cannot count mold, yeast, viruses, etc.)
DOX monitors the growth of bacteria, but is not suitable for counting substances that are difficult to grow or whose components have bacteriostatic action (such as wasabi and tea).

Mold counting is not supported.

Viruses cannot be tested.

Nonbacterial BSE cannot be tested.

Chemical substances cannot be tested.

Under highly acidic conditions, normal bacteria do not grow and thus cannot be counted by DOX.