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Table 2 Epidemiological state transitions of the event-driven, stochastic model

From: Clostridium difficile exposure as an insidious source of infection in healthcare settings: an epidemiological model

Event

Transition probability

State change

Antibiotic treatment of uncolonized individual

αUδt

U-1, U v +1

          exposed individual

αEδt

E-1, E v +1

          colonized individual

αCδt

C-1, C v +1

Gut microbiota recovery of uncolonized individual

λU v δt

U v -1, U+1

            exposed individual

λE v δt

E v -1, E+1

            colonized individual

λC v δt

C v -1, C+1

Exposure of individual without recent Ab use

β[(C+C v +DQ)U/N]δt

U-1, E+1

      individual with recent Ab use

β[(C+C v +DQ)U v /N]δt

U v -1, E v +1

Colonization of individual without recent Ab use

ηEδt

E-1, C+1

       individual with recent Ab use

ηE v δt

E v -1, C v +1

Symptoms develop in indiv. without recent Ab use

θCδt

C-1, D+1

          individual with recent Ab use

θ v Cvδt

C v -1, D+1

Symptoms resolve

ζDδt

D-1, C v +1

Full clearance following treatment

(1-σ)ρDδt

D-1, U v +1

Treatment does not result in full clearance

σρDδt

D-1, E v +1