Name:_______________________

PID #________________________

 

Quiz #3: Labs 9-12

 

1. A Kirby-Bauer test is used to do what?

 

 

 

2.  You isolate a beta hemolytic organism from a patient’s throat swab.  What should you do?

1. immediately give them antibiotics because they have strep throat
2. Do nothing—they’ll recover on their own
3. Perform an ‘A’ disc test to further characterize the type of Streptococcus isolated
4. Perform a ‘P’ disc test to further characterize the type of Streptococcus isolated
5. Perform a bile esculin test

 

3. Name three factors that can influence the efficiency of disinfectants.

 

 

 

 

 

 

 

 

 

4. You perform an antibiotic sensitivity test on an organism isolated from a patient.  The organism is resistant to erythromycin and vancomycin, but susceptible to penicillin, ciprofloxacin, and tetracycline.  Name two factors that you need to consider before telling the doctor which antibiotic to describe.

 

 

 

 

 

 

 

 

 

 

5. What is the specific mechanism by which UV light is damaging (to humans and bacteria)?

 

 

 

 

Bonus #1 (2 points): How does penicillin prevent growth of E. coli? Is it bacteriostatic or bacteriocidal?

 

 

 

 

 

 

 

 

 

 

Bonus #2 (3 points): You can ingest bacteria from alfalfa sprouts in a salad bar.  Should you be concerned? When might this be a problem?