<unk>  is a genus of Gram-positive bacteria. Some species are anaerobic, while others are facultatively anaerobic .<unk>  species do not form spores, and, while individual bacteria are rod-shaped, morphologically<unk>  colonies form fungus-like branched networks of hyphae.
Many<unk>  species are opportunistic pathogens of humans and other mammals, particularly in the oral cavity. In rare cases, these bacteria can cause<unk> is, a disease characterized by the formation of abscesses in the mouth, lungs, or the gastrointestinal tract.
Some species are responsible for the smell of topsoil, which is often particularly noticeable after rain.
Actinomyces
Candida 
Streptomyces
Corynebacterium
Peptococcus
Candida albicans
Mycoplasma
Pseudomonas