Table 2.
Overview of simulation parameters and default values. PERT distributions were defined as transformation of the Beta distribution with minimum (min), maximum (max) and most likely value (mode) and a mean .
| Variable name | Default value | Description | Reference |
|---|---|---|---|
| Modelling disease spread within a herd | |||
| Environment-related recurrence | |||
| envir | 1 | Switch on/off environment-related recurrence within-herd (0/1) | |
| αenvir | 2.5 | α in probability function for environment-related recurrence | Within-herd module validation |
| Within-herd dynamics | |||
| tds | 1 | Switch on/off time-dependent scaling of within-herd transmission | |
| x | 50 | Midpoint s-shape transmission curve | Within-herd module validation |
| k | 0.05 | Steepness of s-shape transmission curve | Within-herd module validation |
| hm | 1 | Switch on/off homogeneous mixing in small herds (0/1) | |
| thsmall | 200 | Herds sizes below or equal to thsmall are categorised as small herds – indicating random mixing within herd | Assumption |
| Modelling disease spread among herds | |||
| Spread via indirect contacts | |||
| ic | 1 | Switch on/off transmission via indirect contacts (0/1) | |
| λin | 0.256 | Average daily probability of indirect contact originating from an LA-MRSA-positive indoor herd | Adjusted based on Boklund et al.41 |
| λout | 0.1864 | Average daily probability of indirect contact originating from an LA-MRSA-positive outdoor herd | Adjusted based on Boklund et al.41 |
| probin | PERT (min = 0.001, max = 0.01, mode = 0.005071) |
Probability of infection via contact from an LA-MRSA-positive indoor herd | Expert opinion |
| probout | PERT (min = 0.001, max = 0.01, mode = 0.0035) |
Probability of infection via contact from an LA-MRSA-positive outdoor herd | Expert opinion |
| proba | PERT (min = 0.001, max = 0.01, mode = 0.004714) |
Probability of infection via abattoir movements | Expert opinion |