Pneumonia with parapneumonic effusion due to <i>Fusobacterium necrophorum</i>: a case report

Fusobacterium is a genus of obligate anaerobic gram-negative bacilli that usually colonize the oropharynx, gastrointestinal tract, upper respiratory tract, and vaginal mucosa of humans as a part of the normal flora. [1,2]Infections may occur once host defense mechanisms are altered and mucosal barriers are disrupted. [3]The clinical spectrum is wide and includes pharyngitis, sinusitis, abscess formation, puerperal infections, bacteremia, and septic shock.Within this genus, two species are most commonly isolated: Fusobacterium nucleatum and Fusobacterium necrophorum (F.necrophorum).F. necrophorum is