FN1 and infection: Similarly, the putative virulence genes found in Margibacter are homologs to outer membrane protein encoding genes ompA and ompH. It has been described that ompA and ompH mediate P. multocida-host cells interaction via heparin and/or fibronectin binding and therefore act as an important invasive factors which might determine the outcome of initial infection (Katoch et al., 2014).