What is a disadvantage of litmus milk medium in diagnostic tests?

Question

What is a disadvantage of litmus milk medium in diagnostic tests?

Answer 1

Ok, from what I understand is that excessive amounts of acid will cause coagulation of the milk. in addition, some bacteria can reduce litmus, causing the litmus indicator to turn white in the bottom of the test tube. Litmus is pink under acidic conditions, purple under alkalline condtions, and white when reduced.

hope this helps!