DNA extraction of Salmonella isolates. 

Agarose gel electrophoresis showing amplification of 401 bp fragments of Typh gene. Lanes 1,2,3,4 showing positive amplification of Salmonella typhimurium 

Agarose gel electrophoresis showing amplification of 284bp fragments of invA gene. Lanes 1,3 showing positive amplification of Salmonella typhimurium 

Agarose gel electrophoresis showing amplification of 571bp fragments of SpvC gene. Lane 1 showing positive amplification of Salmonella typhimurium. 

Agarose gel electrophoresis showing amplification of 85bp fragments of fimA gene. Lanes 1,2 showing positive amplification of Salmonella typhimurium. 

Agarose gel electrophoresis showing amplification of 280bp fragments of stn gene. Lanes 1,2,3,4 showing negative amplification of Salmonella typhimurium.