The qraLm R package is designed to conduct quantitative risk assessments (QRA) specifically for Listeria monocytogenes in various food products, including frozen vegetables, ready-to-eat (RTE) diced cantaloupe, and cold-smoked fish. The package was developed as part of the work under the Joint FAO/WHO Expert Meetings on Microbiological Risk Assessment (JEMRA).
-
Dose-Response Models: The package includes models to assess the risk based on different strain virulence and population susceptibility (age, health conditions).
-
Monte Carlo Simulations: It supports simulations to estimate risks at various stages of the food production chain, from processing to consumer handling practices.
-
Specific Food Pathways: Different modules represent distinct pathways for contamination and risk for each food type, such as blanching, packaging, and defrosting in frozen vegetables, or cross-contamination and processing stages in cold-smoked fish and cantaloupe.
-
Shiny Application: A built-in Shiny app allows users to interactively simulate risk assessments for different food types and contamination scenarios.
-
You can install
qraLmfrom GitHub: https://github.com/WorldHealthOrganization/qraLm using thedevtoolspackage, with the R code below. -
You must first install the
doseresponsemodelspackage from github: https://github.com/WorldHealthOrganization/DRLm/, which implements the dose-response models for Listeria monocytogenes. -
For Windows users it is recommended to install Rtools: https://cran.r-project.org/bin/windows/Rtools/ before.
-
The packages on which
qraLmdepends are:Hmisc,extraDistr,mc2d,matrixStats,DT,dplyr,ggplot2,plotly,doseresponsemodelsandBH; you should install them before installingqraLm.
if (!require("devtools")) install.packages("devtools")
devtools::install_github("https://github.com/WorldHealthOrganization/DRLm/")
devtools::install_github("https://github.com/WorldHealthOrganization/qraLm")You can find the vignettes at the qraLm website:
https://github.com/WorldHealthOrganization/qraLm/.
You can report bugs at: https://github.com/WorldHealthOrganization/qraLm/issues.