Parameter | Interpretations |
| Human recruitment rate. |
| Human contact rate. |
| Human recovery rate. |
| Human Listeriosis induced death rate. |
| Human waning immunity. |
| Human natural death rate. |
| Animal recruitment rate. |
| Animal contact rate. |
| Animal recovery rate. |
| Animal Listeriosis induced death rate. |
| Animal waning immunity. |
| Animal natural death rate. |