haemophilus pittmaniae haemophilus pittmaniae haemophilus pittmaniae is a gram-negative species of bacterium of the family pasteurellaceae. strains of this species were originally isolated from humans. the species may be associated with respiratory infections in individuals with lung disease. haemophilus pittmaniae scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: pasteurellales family: pasteurellaceae genus: haemophilus species: h. pittmaniae binomial name haemophilus pittmaniaenørskov-lauritsen et al. 2005