Aggregatibacter actinomycetemcomitans
BacteriaStrongly associated with aggressive periodontitis, especially in younger patients.
This is information about your result, not a diagnosis. Your provider can tell you what it means for you.
What is Aggregatibacter actinomycetemcomitans?
A. actinomycetemcomitans (Aa) is a gram-negative bacterium that produces a potent toxin (leukotoxin) capable of destroying immune cells. It is the primary pathogen associated with localized aggressive periodontitis.
Why it matters
Aa can get inside gum tissue cells, which makes it harder for the immune system and for treatment to reach. It is associated with faster-moving gum disease, especially in younger adults, even those with good oral hygiene.
What a high result can mean
A high level is associated with faster-moving gum disease, especially in people under 35. Your dentist will decide whether extra treatment is needed.
What usually happens next
Your dentist may pair a deep cleaning with an antibiotic. Whether that is right for you is their call to make with you.
Related markers
This page explains what the test measures. It is not a diagnosis, and it cannot tell you what your result means for you. Your provider can.