Genomic organization of sseJ in S . Typhi and S . Typhimurium. The figure shows the annealing localization of the primers designed (small arrows), the recognition sites of Eco RV and the sseJ probe hibridisation site (thick black line labelled 3450 bp for S. Typhimurium and 1800 bp for S. Typhi). The data were obtained from S. Typhi CT18 and S. Typhimurium LT2 genomes, available in public databases https://www.ncbi.nih.gov.