Electrophoresis result of PCR product of three genes LasA, LasB and PIV. Line 1, DNA Ladder 100 bp plus; Line 2, negative control (Master Mix without DNA) for the LasA gene; Line 3, positive control of the LasA gene; Line 4, positive sample carrying the LasA gene (1075 bp); Line 5, negative control for the LasB gene; Line 6, positive control of the LasB gene (284 bp); Line 7, positive sample carrying the LasB gene; Line 8, negative control for the PIV gene; Line 9, positive control of the PIV gene; Line 10, positive sample carrying the PIV gene (756 bp).