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PCR amplification of 284 bp DNA fragment from the invasion gene invA of Salmonella isolated from broilers farms in Tolima, Colombia. M—100 bp marker; (a) lanes 1–12 and (b) lanes 14–25—Salmonella isolates from Tolima broiler farms; lane 13 and 26—positive control Salmonella Enteritidis ATCC 13076.
