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. 2013 Oct 22;8(10):e76636. doi: 10.1371/journal.pone.0076636

Figure 9. DDE model simulations.

Figure 9

A) Varying the time delay Inline graphic before exposed cattle (in the silent stage) move into the subclinical stage does not cause any significant change to the dynamics of the disease. B: Varying the delay Inline graphic associated with time spent in the subclinical stage contributes to variable disease transmission dynamics and different levels of environmental contamination. With Inline graphic varied from 2 years to 10 years in steps of 2 years.