You preform the Methyl Red and Voges-Proskauer Tests on both S. epidermidis and E. coli.  S. epidermidis was positive for both the Methyl Red and Voges-Proskauer tests.  E.coli was positive for Methyl Red and negative for Voges-Proskauer.  What do these tests results tell you about S. epidermidis and E.coli’s metabolic pathways?

A student performed a gram stain on a gram positive bacillus and obtained the stain shown below:     What is the explanation of these results?

What indicates a positive Voges-Proskauer test?

The biochemical test, Methyl Red, was preformed on an unknown microbe.  The result was a color change from pale yellow to pink.  What conclusion can you make about this microbe?

Which of the following are permissible in an actual microbiology lab?

A microbe that only produces turbid broths in pH tests at pH 4 is considered a(n) _____.

What is the difference between halophiles and halotolerant microbes?

A viable plate has a count of 125 colonies produced from 0.125 mL of a 10-4 dilution of the original sample. The original sample contains _____ CFU/mL.

The inoculation loop must be sterilized _____ when creating a streak plate.  Check all that apply.

After using loops, swabs, toothpicks, spreaders or any other equipment to transfer cultures, immerse the contaminated equipment in ______.