Table 1

Characteristics of sites (n = 122) where PRRSV wild-type ORF5 sequence was identified according to production type
Characteristics of sites Breeding sites Growing sites
n = 53 n = 69
Categorical variables % %
Production type
Farrowing-to-wean 15 -
Farrow-to-grow 6 -
Farrow-to-finish 79 -
Weaners - 16
Weaner-to-finish - 14
Finishers - 70
Ownership
Independent producer 92 43
Contract producer 8 57
Distance from public road
>300 m 6 22
≤300 m 94 78
Continuous variables
Number of productive sows median (Q1-Q3) 185 (136–300) -
Total number of animalsa median (Q1-Q3) 1350 (891–2020) 1550 (1000–2450)
Distance from closest pig site (m)b median (Q1-Q3) 400 (220–610) 409 (200–1000)

a Including gilts, sows, weaners and finishers if present on site, b Approximated by the producer.

Lambert et al.

Lambert et al. BMC Veterinary Research 2012 8:76   doi:10.1186/1746-6148-8-76

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