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. 2024 Mar 30;103(6):103707. doi: 10.1016/j.psj.2024.103707

Figure 1.

Figure 1

Endpoint multiplex PCR subjected to agarose gel electrophoresis to distinguish field versus vaccine origin S. Typhimurium strains. L = 100-bp ladder; 1 = true S. Typhimurium field isolate (positive control); 2 = S. Reading field isolate (S. Typhimurium negative control); 3 = S. Braenderup H9812 (S. Typhimurium negative control); 4 = E. coli K-12 MG1655 (Salmonella negative control); 5 = Megan Egg vaccine; 6 = Megan Vac 1 vaccine; 7 = Poulvac ST vaccine; 8 and 9 = vaccine-origin field isolates; 10 = no template negative control.