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Table 1 Descriptive statistics by frequency of laboratory submissions sent to DTU Vet laboratory for testing PRRSV during the period from 2007 to 2010 for breeding (Breed) and production (Prod) herds. Each laboratory submission consisted of individual blood samples collected from the same herd on the same day

From: Spatial analysis and temporal trends of porcine reproductive and respiratory syndrome in Denmark from 2007 to 2010 based on laboratory submission data

Year 2007 2008 2009 2010
Herd type Breed Prod Breed Prod Breed Prod Breed Prod
Total number of tested herds 237 2982 233 2729 228 2720 220 2673
Median number of submissions per herd (Q1 – Q3) 12 (12–13) 1 (1–1) 12 (12–13) 1 (1–1) 12 (12–13) 1 (1–1) 12 (12–13) 1 (1–1)
Total number of samples 31,505 73,561 33,430 69,233 30,572 67,640 33,420 64,668
Median number of samples per herd (Q1–Q3) 10 (10–15) 20 (17–20) 10 (10–15) 20 (16–20) 10 (10–10) 20 (15–20) 10 (10–15) 20 (15–20)