Molecular identification of P. multocida B:2 and Omph (A) M: O’Gene Ruler 100bp Plus DNA ladder, lane 1: the 480 bps species conserver region amplified by using KMT1T7 and KMT1SP6 primers, lane 2: negative control, lane 3: positive control; (B) M: O’Gene Ruler 100bp Plus DNA ladder, lane 1: the 620 bps serotype specific region amplified by using KMT1T7 and KMT1SP6 primers, lane 2: positive control, lane 3: negitive control. (C) M: O’Gene Ruler 1 kb DNA ladder, lane 1-10: amplified omph amplificaon, lane 11: positive control, lane 12: negitive control.