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Table 2 Mathematical representation of different control strategies and related parameters in the current modelling framework

From: A model-based analysis: what potential could there be for a S. aureus vaccine in a hospital setting on top of other preventative measures?

 

Unvaccinated

Vaccinated

Colonization rate CA-MRSA

(1 - η)F C , 0 ≤ η ≤ 1

(1 - ν CC )(1 - η)F C , 0 ≤ ν CC ≤ 1

ν CC : Vaccine efficacy against CA-MRSA colonization

 

η: Hygiene compliance parameter

F C = β CC (CC + CCV)/N + β IC (IC + ICV)/N

β CC = β CC baseline - s β CC baseline - β IC baseline , 0 ≤ s ≤ 1

β IC = β IC baseline

s: Screening efficacy parameter

Colonization rate HA-MRSA

(1 - η)F H , 0 ≤ η ≤ 1

(1 - ν CH )(1 - η)F H , 0 ≤ ν CH ≤ 1

ν CH : Vaccine efficacy against HA-MRSA colonization

 

F H = β CH (CH + CHV)/N + β IH (IH + IHV)/N

β CH = β CH baseline - s β CH baseline - β IH baseline , 0 ≤ s ≤ 1

β IH = β IH baseline

Decolonization rate CA-MRSA

α C

α C *

 

α C * = α C

α C = dγ CC , 0 ≤ d ≤ 1

d: Decolonization efficacy parameter

Decolonization rate HA-MRSA

α H

α H *

 

α H * = α H

α H = dγ CH , 0 ≤ d ≤ 1

Rate of progression to CA-MRSA infection after colonization

φ C

(1 - ν IC )φ C , 0 ≤ ν IC ≤ 1

ν IC : Vaccine efficacy against CA-MRSA infection

Rate of progression to HA-MRSA infection after colonization

φ H

(1 - ν IH ) φ H , 0 ≤ ν IH ≤ 1

ν IH : Vaccine efficacy against HA-MRSA infection

Vaccination prior to hospital admission

Fraction of vaccinated susceptible flowing into the hospital:

λ SV = c 1 - λ CC baseline - λ CH baseline - λ IC baseline - λ IH baseline

Fraction of vaccinated colonized CA-MRSA flowing into the hospital

λ CCV = c λ CC baseline

Fraction of vaccinated colonized HA-MRSA flowing into the hospital:

λ CHV = c λ CH baseline

Fraction of vaccinated infected CA-MRSA flowing into the hospital:

λ ICV = c λ IC baseline

Fraction of vaccinated infected HA-MRSA flowing into the hospital:

λ IHV = c λ IH baseline

Fraction of unvaccinated colonized CA-MRSA flowing into the hospital:

λ CC = 1 - c λ CC baseline

Fraction of unvaccinated colonized HA-MRSA flowing into the hospital:

λ CH = 1 - c λ CH baseline

Fraction of unvaccinated infected CA-MRSA flowing into the hospital:

λ IC = 1 - c λ IC baseline

Fraction of unvaccinated infected HA-MRSA flowing into the hospital:

λ IH = 1 - c λ IH baseline

 

c: Vaccine coverage parameter, 0 ≤ c ≤ 1