Lecture 5 Microbial Growth I

Question 1

Importance of study microbial control?

Answer 1

prevent diseases
protect infrastructure

Question 2

define antimicrobial agent and list all

Answer 2

antimicrobial agent: chemical, physical, biological agent that inhibits or kills microbes

Sterilization: destroys all bacteria including spores
Disinfectant: kills most bacteria not including spores
Antisepsis: kills or inhibits growth of microorganism, but not endospores.

Chemotherapy: inhibits the growth of microbes on host tissue

Question 3

Physical agents

Answer 3

filtration
heat
radiation

Question 4

What conditions influence the effectiveness of antimicrobial agents?

Answer 4

population composition
population size
duration of exposure
concentration
temperature

Question 5

Decimal reduction time =D

Answer 5

D is the treatment time of a # of organisms to go down by one log

Question 6

Chemical controls

Answer 6

ethanol

chlorine for drinking water

Question 7

Biological controls

Answer 7

Virus, bacteriocins, predatory bacteria