Skip to main content
Figure 3 | Veterinary Research

Figure 3

From: Risk based culling for highly infectious diseases of livestock

Figure 3

Overview of how to calculate the approximate risk that farms were infected in the past based on knowledge of the detected infections (equation 8). In the example below, at day 7 an infected farm is identified as being infected. On day 7 a neighboring farm has on average been exposed to the infected farm for the last 7 days. If the susceptible farm was not detected as being infected then on day 8, it has been on average exposed for 6 days. And so on, until day 14 when on average there is no further exposure. In equation 5 at, for example, day 9, t = 9, tjd = 7, and T = 7 which results in 5 days exposure.

Back to article page