How do the Bacteria strips work

QUESTION?
Do you have any information about what bacteria the bacterial growth indicator test strips test for and how the strips work? I am doing a science fair project and I would like the information to put in my project. Using your strips, I am testing different types of water for bacteria.

ANSWER…
The media technique is a colormetric test using Brain / Heart Infusion media for the detection of
fastidious micro-organisms on a test strip incubated for 48 hours at room temperature.