Identification of the Salmonella Genes Yafd and Xtha : A Step into the Control of Salmonella Food Poisoning Associated with Consumption of Eggs in Egypt

摘要

All serotypes of non-typhoid Salmonella are considered as a potential hazard to human health andmeasures to prevent food-borne salmonellosis should therefore be directed there wise. Here we sought to reportthe identification and incidence of S. enteritidis and S. typhimurium yafD and xthA gene families that areresponsible for their persistence in egg albumen and their survival in egg are important for their transmissionto the human population. The total incidence of Salmonella in the albumen samples was detected as 10.1% ofthe samples [Salmonella enteritidis (7.1%) and S. typhimurium (3.1%)]. As carrier for the yafD (86.7%) and xthA(13.3%) genes, S. enteritidis accounted for 85.0% of the Salmonella serotype isolates. On the other hand, S.typhimurium carrying the xthA gene, accounted for 100% of the total egg albumen Salmonella serotypes withthe absence of the yafD gene from all of the S. typhimurium isolates.