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Table 5 The probability that farms infected with PRRSV will be detected through passive disease surveillance assuming 35% herd prevalence considering all farms and farms in individual risk strata

From: Risk factors for porcine reproductive and respiratory syndrome virus infection and resulting challenges for effective disease surveillance

  Probability of detection of infected farm Percentiles
  n EPI* Mode 5th 95th
All farms 2962 - 0.074 0.067 0.083
HDA* + live vaccine 303 1.000 0.069 0.054 0.084
HDA + no live vaccine 538 0.307 0.091 0.074 0.106
LDA* + live vaccine 765 0.425 0.068 0.053 0.084
LDA + no live vaccine 1356 0.113 0.089 0.074 0.106
  1. The probabilities are shown as proportions.
  2. *HDA=high pig density area, LDA=low pig density area, EPI=effective probability of infection.