Skip to main content
. 2020 Nov 11;8(11):1772. doi: 10.3390/microorganisms8111772

Table 1.

Summary of the listeriosis quantitative risk assessment model for consumption of cultured milk at domestic level: variables, equations or distribution of the input parameters and data sources.

Variable/Parameter Description Value/Equation Distribution Unit Data Source
Co Initial concentration 103 to 104 Uniform cfu/g [22]
Tsl Storage time Minimum 0.5, and Pert Days [22]
Most likely: 6 to 10
Maximum: 45
μmaxSusce
( μmaxTol)
Maximum growth rate for
susceptible (tolerant) L. monocytogenes
Mean: 0.762 ± 0.047 (1.007 ± 0.047) Normal per hour Calculated
Serving Portion consumed Mean: 236.75 ± 170 Log normal gram [22]
Hold Increase during storage μmaxSusceTsl+(μmaxTol)Tsl cfu/g This study and [49]
model for exponential growth phase
D Ingested dose Serving × (Co+ Hold) cfu/serving Calculated
rh Dose–response parameter for
healthy subpopulation
2.37 × 1014 [51]
rs Dose–response parameter for
susceptible subpopulation
1.06 × 1012 [51]
rt Dose–response parameter for
healthy subpopulation
5.8 × 1010 [51]
PillH Probability of illness for
healthy subpopulation
1exp(rh*D) Exponential Exponential dose–response model
[51]
PillS Probability of illness for
susceptible subpopulation
1exp(rs*D) Exponential Exponential dose–response model
[51]
PillT Probability of illness for
transplant subpopulation
1exp(rt*D) Exponential Exponential dose–response model
[51]
NillH Number illness per million
servings for healthy subpopulation
B(1000000,PillH) Binomial Calculated
NillS Number illness per million
servings in susceptible subpopulation
B(1000000,PillS Binomial Calculated
NillT Number illness per million
servings for transplant subpopulation
B(1000000,PillT) Binomial Calculated