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. 2010 Jan 18;41(3):32. doi: 10.1051/vetres/2010004

Figure 1.

Figure 1.

Structure of the metapopulation model. H y,a,z: proportion of birds in age class a, health state z of population y; V x,z: proportion of vectors living at location x that have the health state z; μ y,a: daily mortality rate of birds in age class a of population y; μ v: vector daily mortality rate; λ y,a: force of infection for hosts in age class a of population y; Tv: duration of viraemia in hosts; Tg x: duration of gonotrophic cycle in vectors living at location x; Tx x: duration of the extrinsic incubation period in vectors living at location incubation period in vectors living at location x; q y,a: proportion of bites that occur on birds of population y and age class a; and p y,a: proportion of viraemic birds in population y and age class a.