The group consists of Haemophilus species (H parainfluenza, H aphrophilus, and H paraphrophilus), which may cause respiratory infections or, less commonly, endocarditis Aggregatibacter (formerly Actinobacillus) actinomycetemcomitans, which usually occurs with A israelii in actinomycosis Cardiobacterium hominis Eikenella corrodens, which usually occurs in human bite wounds, endocarditis (often in IV drug users), brain and visceral abscesses, osteomyelitis, respiratory infections (including empyemas), uterine infections related to intrauterine devices, and mixed soft-tissue infections Kingella kingae Antibiotic sensitivities differ among species, so treatment should be directed by susceptibility testing.