Table 2 Contrast of similar parameters in the SELIRS and SELDCRS models
Model | Symbol | Definition |
|---|---|---|
(1) The number of diseased and infectious animals | ||
SELIRS | I | From state I, animals recover and move to state R (recovered) at rate γ, and hence are no longer infectious |
SELDCRS | D | From state D, animals cease showing clinical signs at rate κ but continue to be infectious – this is state C (carrier) |
(2) The number of animals that are infectious but do not show clinical signs | ||
SELIRS | This does not occur in SELIRS; only animals showing clinical sign are infectious | |
SELDCRS | C | From state C, animals move to state R (recovered) at rate α, and hence are no longer infectious |