Which organization establishes the concentration level of each antimicrobial disk used in the disk diffusion test?

In the disk diffusion test, the agar plate is inoculated the way it is to make it easier to measure the results.

The enzyme used in indole production is thiosulfate reductase.

The microorganisms responsible for dental caries are able to live in an environment that __________ than that in which other bacteria are able to live.

In sulfur reduction, the compound produced in both reactions is __________.

The clear area that forms around an antimicrobial disk is known as the ___________.

The Snyder test was designed to ___________.

The Snyder test medium was inoculated __________.

The product produced by sulfur reduction combines with __________ in the SIM media to produce a black precipitate in a positive reaction.

The result seen here for the urea hydrolysis test would indicate a __________ result for the presence of the enzyme __________.