Fusobacterium nucleatum causing a pyogenic liver abscess: a rare complication of periodontal disease that occurred during the COVID-19 pandemic http://orcid.org/0000-0003-0895-2244Laurence Collins1 and Tom Diamond2 1Hepatobiliary Surgery, Mater Infirmorum Hospital, Belfast, UK 2Hepatobiliary Surgery, Mater Hospital, Belfast, UK Correspondence to Laurence Collins; collins.laurence{at}doctors.org.uk Abstract Fusobacterium nucleatum is a periodontal commensal and pathogen.