1. What is the minimum zone of inhibition for the bacteria to be considered susc

Question

1.

What is the minimum zone of inhibition for the bacteria to be considered susceptible to novobiocin?

Select one:

c. 16 mm

2.

Identification of Gram-positive cocci: You execute an Optochin Test using a disc. You observe a clearing of 13 mm with surrounding confluent growth. Which of the following would you conclude?

Select one:

a. The test was double positive

b. The test was negative

c. The growth was insufficient

d. The test was positive

3.

Identification of Gram-positive cocci: Which genus of the following would likely test positive for catalase and grow in 6.5% salt?

Select one:

a. Enterococcus

b. More than one is correct

c. Micrococcus

d. Streptococcus

e. Staphylococcus

4.

Bacitracin is used for:

Select one:

a. Identifying unknown bacteria

b. Boo-boos

c. Preventing infection after skin cuts

d. Uh-ohs

5.

Identification of Gram-positive cocci: Which genus of the following would NOT likely grow in a candle jar?

Select one:

a. Micrococcus

b. Staphylococcus

c. More than one is correct

d. Streptococcus

e. Enterococcus

Explanation / Answer

Answer:

1) What is the minimum zone of inhibition for the bacteria to be considered susceptible to novobiocin?

Answer: 16mm

2. Identification of Gram-positive cocci: You execute an Optochin Test using a disc. You observe a clearing of 13 mm with surrounding confluent growth. Which of the following would you conclude?

Select one:

a. The test was double positive

b. The test was negative - Correct Answer (optochin resistant, since growth was already confluent)

c. The growth was insufficient

d. The test was positive

3.Identification of Gram-positive cocci: Which genus of the following would likely test positive for catalase and grow in 6.5% salt?

Select one:

a. Enterococcus

b. More than one is correct - Correct (Staphylococcus and Micrococcus are both catalase positive and can grow in 6.5%salt)

c. Micrococcus

d. Streptococcus

e. Staphylococcus

4. Bacitracin is used for:

Select one:

a. Identifying unknown bacteria

b. Boo-boos

c. Preventing infection after skin cuts - Correct Answer

d. Uh-ohs

5. Identification of Gram-positive cocci: Which genus of the following would NOT likely grow in a candle jar?

Select one:

a. Micrococcus

b. Staphylococcus

c. More than one is correct

d. Streptococcus

e. Enterococcus

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