Patent ID: 9598715
Date: 2017-03-21
CPC Classifications: C12Q,G01N

Claim:
1. A method for measuring cariogenic bacterial count in a test sample comprising cariogenic bacteria using a color change of an oxidation-reduction indicator, the method comprising the steps of: reacting a test reagent with the test sample and measuring the resulting color change by a reflectometer, wherein the test reagent comprises: resazurin as an oxidation-reduction indicator; an oxidation-reduction promoter selected from the group consisting of 1-methoxy-5-methylphenazinium methyl sulfate, phenazinium methyl sulfate and phenazine ethosulfate; and a halogen salt selected from the group consisting of sodium chloride, potassium chloride, sodium bromide and potassium bromide present at a concentration range of from 50 to 200 mM, wherein the method measures the cariogenic bacterial count based on the degree of the color change of said oxidation-reduction indicator.