Selective Medium

Question 1

Common Dye inhibitors

1. Basic fuchsin
2. Methylene Blue
3. Brilliant green
4. Thionine
5. Eosin

A. Inhibits Gram +
B. Inhibits Gram -

Answer 1

1. B
2. A
3. A
4. B
5. A

Question 2

Common Chemical inhibitors

1. Bismuth sulfite
2. Bile salts
3. Potassium tellurite
4. Sodium azide
5. Citrate
6. Phenyl ethyl alcohol

A. Inhibits Gram +
B. Inhibits Gram -

Answer 2

1. A
2. A
3. B
4. B
5. A
6. B

Question 3

Common Antibiotic inhibitors

1. Nystatin
2. Trimethoprim
3. Anisomycin
4. Nalidixic acid
5. Vancomycin
6. Colistin
7. Amphotericin

A. Inhibits fungi
B. Inhibits gram +
C. Inhibits gram -

Answer 3

1. A
2. C
3. A
4. C
5. B
6. C
7. A