Actinomyces is a genus of bacteria that belongs to the Actinobacteria class. They are Gram-positive, rod-shaped, and non-motile. The genus is usually found in the environment and rarely causes disease, although they can be opportunistic pathogens in humans.
Actinomyces are anaerobic, meaning they prefer environments without oxygen. They are found in soil, decaying vegetation, and water, and they can form biofilms on surfaces such as teeth or medical implants. They are also found in the human mouth and gastrointestinal tract.
Actinomyces are not fungi, but they have been known to form filamentous structures that are similar to fungi. This is caused by the bacteria’s ability to produce a thick extracellular matrix which can form long filaments. It is also believed that Actinomyces can form symbiotic relationships with fungi, although this is still being studied.
In conclusion, Actinomyces are bacteria and not fungi. They are Gram-positive, rod-shaped, and anaerobic, and they are found in soil, decaying vegetation, and water. They are also capable of forming biofilms and filaments, and they may form symbiotic relationships with fungi.