Porphyromonas is a genus of bacteria that are primarily found in the human mouth and gastrointestinal tract. These bacteria are anaerobic, meaning they thrive in environments without oxygen. Some species within this genus are known to be associated with periodontal disease, which affects the gums and supporting structures of the teeth. In addition to their role in oral health, Porphyromonas species can also be involved in other infections, particularly in immunocompromised individuals. Research continues to explore their impact on human health, including their potential links to systemic diseases and inflammatory conditions.