2.3 Information sources and search methodology
A single reviewer consulted PubMed, CAB Abstracts, Virtual Health Library (VHL), Science Direct, Scopus, and Web of Science from 24 February to 02 March 2020 to find scientific literature. To find the most relevant and specific publications, the reviewer conducted separated searches for each outcome (prevalence, serovars, and antimicrobial resistance). For this, we defined a common search term for the population [(salmonell* OR salmonella OR salmonellosis) AND (avian OR poultry OR broiler OR laying hen OR fowl OR chick)] that was used in conjunction with search terms for prevalence (prevalence OR incidence), serovars (genotype OR serotyping OR serovar), and antimicrobial resistance (resistance OR resistant). Full searches and the number of recovered records for each database are presented inSupplementary Table 1 of the supplementary material. After completing the searches, all the retrieved records were downloaded and stored in a single library in EndNote x9 (Thompson Reuters, USA).