| σti
|
Rate describing the number of infected flies from a single infected animal on a single day. Inserted into a random Poisson distribution. |
|
≥0 |
| nv
|
Expected number of vector bites per day |
After Gerry et al36 and consistent with studies from Scotland Searle et al14, Blackwell et al15. |
2500 |
| vi
|
Spatial adjustment to nv based upon landscape suitability and Culicoides species competence. |
After Purse et al13. |
0.5 ≤ vi ≤ 1 |
| LP
|
Proportion of 1 km buffer identified as pasture |
CORINE landcover 200040
|
≤1 |
| Lh
|
Proportion of 1 km buffer identified as heathland |
CORINE landcover 200040
|
≤1 |
| vt
|
Temporal adjustment to nv based upon temporal peaks in Culicoides abundance |
After Searle et al14. |
0.25, 1 |
| T |
Temperature. |
See supplementary material
|
9.3 −19°C |
| vm
|
Temperature dependant vector mortality rate. |
After Gerry et al37
|
<1 |
| ve
|
Extrinsic (within vector) incubation period |
After Carpenter et al25 work on BTV |
|
| vb
|
Time interval between bites |
After Mullens et al38 work on BTV |
|
| σv
|
Probability of transmission between host and vector. |
After Veronesi et al3
|
0.19 |
| nL
|
Number of susceptible livestock. |
From the Scottish June agricultural census. |
|
| σT
|
Probability of transmission from vector to host |
Derived from Baylis et al39
|
0.77 |
| latent period |
Period between infection and viraemia within the animal |
Approximation from experimental infections of 3 cattle1. |
2 days |
| Infectious period |
Period of infectiousness of an animal |
Approximation from experimental infections of 3 cattle1. |
4 days |
