Loading metrics Open Access Peer-reviewed Research Article Alan Gutierrez, Keith R. Schneider Alan Gutierrez, Keith R. Schneider Published: April 19, 2022 https://doi.org/10.1371/journal.pone.0267178 Abstract The use of poultry litter as a biological soil amendment presents a risk for the preharvest contamination of fresh produce by Salmonella. In order to properly assess this risk, it is important to understand the factors influencing the persistence of Salmonella in poultry litter.