Actinomyces is a genus of the actinobacteria class of bacteria. They are all Gram-positive and can be either anaerobic or facultatively anaerobic . Actinomyces species don't form endospores, and, while individual bacteria are rod-shaped, morphologically Actinomyces colonies form fungus-like branched networks of hyphae. Actinomyces are known for causing disease in humans, and for the important role they play in soil ecology. They produce a number of enzymes that help degrade organic plant materi… (More on Actinomyces)