Actinomyces naeslundii is a Gram-positive, rod-shaped bacterium found in the mouth of humans. The species has been implicated in periodontal disease, as well as various tooth cavities.
Description
A. naeslundii appears Gram-positive and pleomorphic by microscopy. It does not form spores, and is considered anaerobic or microaerophilic.
Role in disease
Many species of the genus Actinomyces, including A. naeslundii, cause a chronic disease called actinomycosis, which is characterized by swelling and formation of an abscess which may exude pus. This can be accompanied by tissue fibrosis.
Infections of the mouth, face, and neck are the most commonly recognized infections; however, the thoracic region, abdomen, pelvis, and the central nervous system can also be involved.
References
External links
- Actinomyces naeslundii MG1 Genome Page
- Type strain of Actinomyces naeslundii at BacDive - the Bacterial Diversity Metadatabase