RT-PCR for confirmation of avian influenza H5, H7 and H9 viruses. Lane 1 = 100bp DNA marker (Fermentas, USA), lane 2 and 3= An expected PCR product size 499 bp was detected positive for influenza (H5), lane 4 and 5 = An expected PCR product size 409 bp positive for influenza (H7) and lane 6 and 7 = An expected PCR product size 221 bp positive for influenza (H9).