Isolation and characterization of Salmonella enterica serovars from poultry in Egypt: a comprehensive genetic analysis of ESBLs, MCR, integron and other resistance genes

Based on serological identification, this study reports the detection of rare Salmonella enterica serovars, such as S. Colorado and S. Jerusalem, with extensive drug resistance (XDR) in broiler farms in Egypt. These isolates carried critical resistance genes, including intI1, mcr-1, and various β-lactamases. The findings underscore the urgent need for surveillance, biosecurity, and antimicrobial stewardship to protect public health and poultry production.