Symbol | Definition |
---|---|
S | The number of susceptible animals |
E | The number of infectious doses in the environment |
L | The number of latently infected animals |
I | The number of diseased and infectious animals in SELIRS model |
D | The number of diseased and infectious animals in SELDCRS model |
C | The number of infectious carriers in the SELDCRS model |
N | The total number of host animals in the population |
R | The number of recovered animals |
ν | The rate at which latently infected animals develop clinical signs and become infectious |
μ | The rate at which infectious doses (bacteria) die in the environment, other than by host animals |
ω | The rate at which infectious doses (bacteria) are physically removed by each host animal in the population |
χ | The total rate at which infectious doses (bacteria) are removed from the environment, calculated as μ + ω N |
γ | The rate at which diseased and infectious animals stop showing clinical signs and are no longer infectious, in the SELIRS model |
κ | The rate at which diseased animals stop showing clinical signs, while continuing to be infectious in the SELDCRS model |
α | The rate at which infectious animals that no longer show clinical signs of the disease stop being infectious in the SELDCRS model |
λ | The rate at which recovered animals lose resistance and become susceptible |
ξ | The rate at which susceptible animals become infected by 1 unit of infectious dose in the environment |
φ | The rate at which an infectious animal sheds infectious doses in the environment |
p | The prevalence of the disease as observed from clinical signs |
R' | The notional reproductive rate of the infectious disease |