Growth Factors for Selected Bacteria
Water Activity (aW):
|
Pathogen |
Minimum Growth |
Optimal Growth |
Maximum Growth |
|
Salmonella spp. |
0.94 |
0.99 |
>0.99 |
|
Staphylococcus aureus |
0.83 |
0.98 |
>0.99 |
|
Escherichia coli |
0.95 |
0.995 |
- |
|
Listeria monocytogenes |
0.92 |
- |
- |
|
Clostridium perfringens |
0.97 |
0.95 to 0.96 |
0.93 |
Taken from References (Growth Factors) in the Pathogen Modeling Program at: www.arserrc.gov/mfs/pathogen.htm
pH:
|
Pathogen |
Minimum Growth |
Optimal Growth |
Maximum Growth |
|
Salmonella spp. |
3.8 |
7.0 to 7.5 |
9.5 |
|
Staphylococcus aureus |
4.0 |
6.0 to 7.0 |
10.0 |
|
Escherichia coli |
4.4 |
6.0 to 7.0 |
9.0 |
|
Listeria monocytogenes |
4.4 |
7.0 |
9.4 |
|
Clostridium perfringens |
5.5 to 5.8 |
7.2 |
8.0 to 9.0 |
Taken from References (Growth Factors) in the Pathogen Modeling Program at: www.arserrc.gov/mfs/pathogen.htm