Includes A. equuli (from animal mouths), A. lignieresi, A. suis, A. ureae. A. actinomycetemcomicans (from human mouth) is now Aggregatibacter actinomycetemcomitans
A. actinomycetemcomicans is a cause of endocarditis (it puts the A in HACEK), head and neck infections and part of aspiration pneumonia with or without empyema. All the rest occasionally cause infections from animal bites.
Sloooooow growers and can take > 48 h to pop positive in blood cultures.