[actino- + bacillus]
A genus of aerobic gram-negative coccobacilli that are parasites of hoofed mammals, and, rarely, of humans. The now-preferred but less common name is Aggregatibacter.
A species that often colonizes the upper respiratory tract, is an important cause of periodontal infection, and is sometimes implicated in blood-culture negative endocarditis, brain abscesses, meningitis, or osteomyelitis. A. actinomycetemcomitans was formerly called Haemophilus aphrophilus; its now-preferred but less common name is Aggregatibacter aphrophilus.
SEE: Aggregatibacter aphrophilus
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