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. Author manuscript; available in PMC: 2008 Jun 19.
Published in final edited form as: J Theor Biol. 2007 Aug 25;249(3):487–499. doi: 10.1016/j.jtbi.2007.08.011

Table 3.

State variables of the DEM

Symbol Interpretation
HU (t) Fraction of HCW uncontaminated
HN (t) Fraction of HCW contaminated only by the non-resistant strain
HNR(t) Fraction of HCW contaminated by both the resistant and the non-resistant strains
HR(t) Fraction of HCW contaminated only by the resistant strain
PU(t) Fraction of patients uninfected
PN(t) Fraction of patients infected only by the non-resistant strain
PRS(t) Fraction of patients infected first by the non-resistant strain and then by the resistant strain
PNR(t) Fraction of patients infected by both the resistant and the non-resistant strain
PRR(t) Fraction of patients infected only by the resistant strain
pK(t, a) Infection age density of the fraction of infected patients of class K = N; RS; RR; NR
PKI(t) Fraction of patients infectious at time t with the strain K = N; NR; R