Bacterial Growth

Question 0

Lag phase

Answer 0

The phase in the cycle where no change in cell number occurs

Question 1

Phases of growth curve of a pure bacterial culture in a closed system:

Answer 1

1. Lag phase
2. Log/exponential phase
3. Stationary phase
4. Death/decline phase

Question 2

Exponential/log phase

Answer 2

Growth occurs at logarithmic rate

Question 3

Generation time (GT)

Answer 3

Time required for a parent to divide into 2 Daughter cells

Question 4

Stationary phase

Answer 4

Phase in the cycle after log phase where there is no net increase in cell numbers.

Question 5

Death phase

Answer 5

After stationary phase. Cell death occurs at logarithmic rate

Question 6

Bacteria w/ a short mean generation time (generally) produce what type of infection?

Answer 6

Fulminant (rapid) infections

–> high Ag dose

Question 7

Bacteria w/ a long mean GT generally produce what type of infections?

Answer 7

Chronic infections

–> low Ag dose

Question 8

Effects of chemotherapeutic agents:

Inhibitors of protein &/or peptidoglycan synthesis are more effective against _________

Answer 8

fast growing bacteria

Question 9

Slower growing infections are much less active and __________ to target w/ antibiotics

Answer 9

Harder to target