In the oxidase test, what reacts with tetramethyl-r-phenylenediamine dichloride to result in a colour change of this reagent from clear to blue?

You will be supplied with the results for two first-stage tests in Activity #3. Which tests are these?

Which samples from the 12-well plate will you subculture onto TSA media?

When subculturing from a 12-well plate onto tryptic soy agar (TSA) media to determine the minimum bactericidal concentration (MBC), does the TSA media contain antibiotics?

When performing the antibiotic dilution test, the presence of turbidity indicates bacterial growth.

First and second-stage tests are performed on mixed cultures.

In the antibiotic dilution test, the sterility control contains:

In the antibiotic dilution test, the growth control contains:

You will set-up the dilution test using an antibiotic stock solution. What concentration is the penicillin stock solution?