2.1 Protocol and objectives
A protocol, available from the corresponding author upon reasonable request, was developed a priori in accordance to the Preferred Reporting Items for Systematic reviews and Meta-analysis Protocol (PRISMA-P) statement (Moher et al., 2015). The study was conducted according to the Cochrane handbook for systematics reviews (Higgins et al., 2019) and it is reported in agreement with the PRISMA statement (Liberati et al., 2009). We conducted a systematic review and meta-analysis to address the following questions: What is the prevalence of NTS in samples of poultry from the Americas? Which are the main serovars of NTS identified in each type of sample? What is the prevalence and profile of antimicrobial resistance in NTS isolates of poultry?