Haemophilus ducreyi is the gram-negative, facultative anaerobic bacterium that causes chancroid. What is the Pathology of Haemophilus Ducreyi? The pathology of haemophilus ducreyi is: -Etiology: The cause of haemophilus ducreyi is bacteria. -Genes involved: lspA1, lspA2 and tadA. -Pathogenesis: The…