Table 2

Cumulative and annual EP spatial spread
EP ID
(n = 16)
 Farms reporting EP (farm ID)
 Cumulative distance over 18 years (EPdist, km)
 Years (between first and last isolation)
 Annual spread velocity between first and last isolation (EPspeed, km/year) [C/D]
A
 B
 C
 D
 E
15
 7 to 9, to 2, to 13+22, to 1+3
 965.46
 9
 107.27
79
 2 to 3, to 1+4
 208.01
 2
 104.01
7
 10 to 1, to 3
 389.58
 4
 97.40
16
 13 to 1, to 18
 335.03
 4
 83.76
37
 2 to 3, to 1
 175.58
 3
 58.53
10
 1 to 3+7, to 9, to 4, to 2
 643.87
 12
 53.65
62
 22 to 3, to 7
 203.23
 5
 40.65
29
 1+2+7, to 3, to 12, to 5, to 8, to 6 +22, to 21, to 17, to 4
 682.27
 17
 40.13
46
 3 to 2, to 6
 145.84
 4
 36.46
30
 2 to 7, to 1, to 4
 517.71
 17
 30.46
13
 2 to 3+6, to 7
 117.95
 6
 19.66
38
 7 to 20, to 8, to 2, to 3
 194.35
 17
 11.43
63
 14 to 3
 69.50
 7
 9.93
17
 3 +5 to 1
 104.87
 11
 9.53
26
 2 to 1
 37.36
 4
 9.34
31
 1 to 2+3, to 6
 113.63
 14
 8.11
Median
198.79
 6.5
 38.30

A: Farm identifiers.

B: Estimated route of EP dissemination, based on farm location (as reported in Table 1)

C: EP spatial spread (km) over the entire length of the study period (18 years), or EPdist

D: Time (years) between earliest and latest EP isolation

E: EP spread velocity (km/year), or EPspeed

Rivas et al. International Journal of Health Geographics 2008 7:58   doi:10.1186/1476-072X-7-58

Open Data