Table 1

EP temporal spread among farms infected between 1988 and 2005
EP ID# (n = 23)
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
 00
 01
 02
 03
 04
 05
 Mean farms/yeara
# 2









2

2



0.50
# 5









2
 2
 2
 2



1.00
# 7











10
 1
 1
 3
 3
1.00
# 10


1
1,37
9
4
1,2
 1, 3
 1
 1
 1

1.00
# 13









2
 2
 2,36
 1,2, 6,7
 1
 1,7
 1
1.86
# 15




7
9

2
 13, 22
 1, 2,3
 1
 1


1.00
# 16










13
 1
 1
 1, 18
 1

1.20
# 17




3,5





1

1
 1
0.42
# 26










2
1
 1
 1

0.80
# 27












1
 1
 1
 1
1.00
# 29
 1, 2, 7
2,3
 12
1, 2,5
 12

8
 2
 2,6,22
 1,23,6 22
 6,7, 21
 1, 2
 1, 7, 17
 1,4
 4
 1.72
# 30
 2



2




2
 2
 7
 1
 1
 1, 4
 4
 0.55
# 31
 1



2,3





2, 3, 6
 6
 2


0.53
# 37












2
 2
 2,3
 1, 2
1.50
# 38
 7

20
7
7
 7
 8
 2
 2
 2,3
 2
2,3
 2,3
 3
 0.89
# 40
 2
2













2
 0.17
# 46











3

2, 3
 2, 6
1.00
# 53







14








1.00
# 58












6
 6
 6
 6
1.00
# 62










22


3
 3, 7
0.67
# 63







14





3

0.25
# 64













3
 3
 3
 3
 1.00
# 79













2
 2,3
 1, 4
1.67

Columns indicate the year (two-digit number) each EP was reported, and the farm(s) where it was located. Numbers in italics refer to farm identifiers, not number of isolations.

a: Mean farms/year: number of farms where the EP was isolated/times (years when EP was isolated). For example, EP 2 was found in one farm (farm 2) in the first year it was observed, not found in the following 2 years, and found again in the last year it was observed (4 years in total, with 1, 0, 0, and 1 findings, or a mean = 0.5)

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

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