| A | B |
| Food | Bacteria needs something to consume in order to grow. Protein rich foods are most susceptible. |
| Acidity | Most bacteria prefer a slightly acidic to neutral environment to grow. |
| Time | The longer bacteria spends in an environment that promotes their growth, the more bacteria will grow. |
| Temperature | Bacteria grows quickly between 41F and 135F. It grows even faster between 70F and 125F. |
| Oxygen | Most bacteria are aerobic, meaning they need oxygen to grow. |
| Moisture | Bacteria need a high water activity to grow. |