A state-time epidemiology model of tuberculosis: Importance of re-infection

Pienaar, Elsje (author): Linköpings universitet,Institutionen för klinisk och experimentell medicin,Hälsouniversitetet

(creator_code:org_t)

Elsevier, 2012
2012
English.
In: Computational biology and chemistry (Print). - : Elsevier. - 1476-9271 .- 1476-928X. ; 36, s. 15-22

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

An epidemiological model is presented that considers five possible states of a population: susceptible (S), exposed (W), infectious (Y), in treatment (Z) and recovered (R). in certain instances transition rates (from one state to another) depend on the time spent in the state; therefore the states W, Y and Z depend on time and length of stay in that state - similar to age-structured models. The model is particularly amenable to describe delays of exposed persons to become infectious and re-infection of exposed persons. Other transitions that depend on state time include the case finding and diagnosis, increased death rate and treatment interruption. The mathematical model comprises of a set of partial differential and ordinary differential equations. Non-steady state solutions are first presented, followed by a bifurcation study of the stationary states.

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