Lecture 4 Outline - Dynamics of Microbial Growth

Question 1

Which environmental factors influence Microbial Growth?

Answer 1

Temperature, O2 availability, pH and water availability

Question 2

What are the temperature ranges of the following groups:

1. psychrophiles
2. psychrotrophs
3. mesophiles
4. thermophiles
5. hyperthermophies

Answer 2

remember psychro stands for cold, troph stands for nurishment, meso stands for middle, hyper stands for excessive (section 4.4)

1. psychrophile -5 to -15 C
2. psychrotroph 15 to 30 C
3. mesophile 25 to 45 C
4. thermophile 45 to 70 C
5. hyperthermophile 70 or greater